chore(ci): update error format ratchet baseline

Co-Authored-By: heihutu <heihutu@gmail.com> Co-Authored-By: zhi22915 <qiuzgang@gmail.com>
fix(ecstore): recover interrupted pool metadata writes
2026-09-07 12:35:54 +00:00 · 2026-09-07 20:29:06 +08:00 · 2026-09-07 20:29:06 +08:00 · 2026-09-07 20:20:21 +08:00 · 2026-09-07 19:55:29 +08:00 · 2026-09-07 19:55:20 +08:00
377 changed files with 79009 additions and 5840 deletions
@@ -0,0 +1,2 @@
+sha256-linux=4696a43b167ac608b3b8677027c9fe9fdac3396d37c8cca11dce531c720ac6d2
+sha256-darwin=9785867929047dfd8c6f768e0d2b1e0a8fdba85216f4a4139093b1619d03ff07
@@ -1,2 +1,2 @@
-sha256-darwin=a881fd7d3f5cb94654221ca85b8b30cce1b95e608824a55a15339cbc294e6d34
-sha256-linux=a2933d83dfe74ffa03410a0959333a1c48288b8469ca9f17273d449d7510c24b
+sha256-darwin=53b05ac745905809d3828c6994bdd8ecf9d20b2b61a8a9d80fe15eb62f932193
+sha256-linux=7c892afa4b9d1591b46bd79c976b647109a277284fddb3b98edced4b0297eda2
@@ -1 +1 @@
-sha256=a2542dc86bbff56b2177efc621785c56fa7e8d813b209b7d935e1e41a9f0ad15
+sha256=5db88c6fec94d4f269c7d9cfc128bd2adc27b3d7021127e2fa0b1daccc5f900f
@@ -40,6 +40,21 @@
      "invariant": "corrupt-part-arrays",
      "suite": "rustfs-filemeta",
      "name": "filemeta::test::crc_valid_but_part_arrays_corrupt_into_fileinfo_errors_not_panics"
+    },
+    {
+      "invariant": "odm-source-contract-s3",
+      "suite": "rustfs",
+      "name": "on_demand_migration::source_client::tests::s3_backend_satisfies_the_shared_backend_contract"
+    },
+    {
+      "invariant": "odm-source-contract-azure",
+      "suite": "rustfs",
+      "name": "on_demand_migration::azure::tests::azure_backend_satisfies_the_shared_backend_contract"
+    },
+    {
+      "invariant": "odm-source-contract-gcs",
+      "suite": "rustfs",
+      "name": "on_demand_migration::gcs::tests::gcs_native_backend_satisfies_the_shared_backend_contract"
    }
  ],
  "fixtures": [
@@ -3,9 +3,10 @@
 .NOTPARALLEL: pre-commit pre-pr dev-check

 .PHONY: setup-hooks
-setup-hooks: ## Set up git hooks
+setup-hooks: ## Install the configured pre-commit hooks
 	@echo "🔧 Setting up git hooks..."
-	chmod +x .git/hooks/pre-commit
+	pre-commit validate-config
+	pre-commit install
 	@echo "✅ Git hooks setup complete!"

 .PHONY: doc-paths-check
@@ -31,6 +31,7 @@ script-tests: ## Run shell script tests
 	./scripts/test_object_batch_bench_enhanced.sh
 	./scripts/test_hotpath_warp_ab_gate.sh
 	./scripts/test_hotpath_warp_abba.sh
+	./scripts/test_scanner_validation_harness.sh
 	./scripts/test_exact_1mib_handoff_abba.sh
 	./scripts/test_pinned_paired_abba_bench.sh
 	./scripts/test_manual_transition_runbooks.sh
@@ -41,10 +42,12 @@ script-tests: ## Run shell script tests
 	$(RUSTFS_PYTHON_BIN) ./scripts/check_security_coverage.py --self-test
 	$(RUSTFS_PYTHON_BIN) ./scripts/check_scheduled_validation_freshness.py --self-test
 	$(RUSTFS_PYTHON_BIN) ./scripts/test_security_workflow.py
+	$(RUSTFS_PYTHON_BIN) ./scripts/test_nightly_candidate.py
 	$(RUSTFS_PYTHON_BIN) ./scripts/s3-tests/test_report_compat.py
 	bash -n ./scripts/validate_object_data_cache_cold_stampede.sh
 	$(RUSTFS_PYTHON_BIN) ./scripts/check_object_data_cache_follower_samples.py --self-test
 	./scripts/validate_object_data_cache_cold_stampede.sh --self-test
+	./scripts/run_scanner_heal_evidence_case.sh --self-test

 .PHONY: test
 test: core-deps script-tests ## Run all tests (needs cargo-nextest; RUSTFS_ALLOW_CARGO_TEST_FALLBACK=1 to override)
@@ -1,10 +1,11 @@
 # Committed floor for the number of tests selected by the migration-critical
 # CI gate (see scripts/check_migration_gate_count.sh, backlog#1153 infra-12).
 #
-# The floor equals the exact count of rustfs-ecstore --lib tests matching the
-# gate filter (name substrings: data_movement, rebalance, decommission,
-# source_cleanup, delete_marker) at the time this file was last updated.
+# The floor equals the exact count of rustfs-ecstore --lib tests, with the
+# test-util feature enabled, matching the gate filter (name substrings:
+# data_movement, rebalance, decommission, source_cleanup, delete_marker) at
+# the time this file was last updated.
 # CI fails if the selected count drops below this number, so renames or
 # removals that thin the gate must update this file in the same PR.
 # Adding tests does not require a bump, but bumping keeps the guard tight.
-571
+946
@@ -183,6 +183,13 @@ test-group = 'e2e-reliability'
 filter = 'package(e2e_test) & test(/^inline_fast_path_cluster_test::/)'
 test-group = 'e2e-inline-boundaries'

+# 4-node 4-drive distributed Actions suite: each case starts four rustfs
+# processes and up to sixteen data directories. Serialize across nextest's
+# process boundary so several 4x4 clusters never overlap.
+[[profile.default.overrides]]
+filter = 'package(e2e_test) & test(/^distributed::/)'
+test-group = 'e2e-cluster-nightly'
+
 # Vault KMS tests share the fixed dev-server port 8200. serial_test's #[serial]
 # does not cross nextest process boundaries, so keep every Vault-backed test in
 # one group.
@@ -526,6 +533,27 @@ path = "junit.xml"
 filter = 'package(e2e_test)'
 test-group = 'e2e-cluster-nightly'

+# ---------------------------------------------------------------------------
+# e2e-distributed profile — 4-node 4-disk Actions suite
+# ---------------------------------------------------------------------------
+# Storage-sensitive PR / nightly / dispatch lane owned by
+# .github/workflows/e2e-distributed.yml.
+# Each case starts four rustfs processes (and for site replication, two
+# clusters). Upgrade cases also require RUSTFS_UPGRADE_SOURCE_BINARY.
+# Serialized via e2e-cluster-nightly with no retries.
+[profile.e2e-distributed]
+default-filter = 'package(e2e_test) & test(/^distributed::/)'
+fail-fast = false
+# Decommission / rebalance cases poll for up to 180s with little stdout.
+slow-timeout = { period = "120s", terminate-after = 6 }
+
+[profile.e2e-distributed.junit]
+path = "junit.xml"
+
+[[profile.e2e-distributed.overrides]]
+filter = 'package(e2e_test)'
+test-group = 'e2e-cluster-nightly'
+
 # ---------------------------------------------------------------------------
 # e2e-odm-interop profile — on-demand migration provider interop lane (ODM-20)
 # ---------------------------------------------------------------------------
@@ -586,6 +614,10 @@ path = "junit.xml"
 #     cluster-fault lane. heal_erasure_disk_rebuild is intentionally not
 #     excluded here because backlog#2213 promotes core heal rebuild coverage to
 #     this merge/main lane while retaining nightly coverage.
+#   * distributed:: — 4-node 4-disk Actions suite (S3, lock, versioning,
+#     replication, quota, observability, expand/decommission/rebalance, site
+#     replication, chaos, upgrade history/IAM). Owns [profile.e2e-distributed] and
+#     .github/workflows/e2e-distributed.yml.
 #   * on_demand_migration::interop_test — the ODM-20 provider interoperability
 #     cases, which are meaningless without a source: they run in the dedicated
 #     [profile.e2e-odm-interop] lane below, where the workflow points them at a
@@ -607,6 +639,7 @@ default-filter = """
    package(e2e_test)
    & !test(/^protocols::/)
    & !test(/^(admin_timeout_regression_test|cluster_concurrency_test|cluster_multidrive_pool_test|degraded_listing_availability_test|namespace_lock_quorum_test|object_lambda_test|stale_multipart_cleanup_cluster_test)::/)
+    & !test(/^distributed::/)
    & !test(/^replication_extension_test::/)
    & !test(/^replication_target_matrix_test::/)
    & !test(/^on_demand_migration::(concurrency_test|fault_test|interop_test|real_source_test)::/)
@@ -0,0 +1,56 @@
+{
+  "schema": 1,
+  "cases": {
+    "background-target-restart": {
+      "gate": "G14",
+      "task": "W21",
+      "lane": "e2e-nightly",
+      "suite": "e2e_test",
+      "name": "heal_erasure_disk_rebuild_test::tests::test_cluster_root_heal_recovers_remote_shards_after_background_target_restart",
+      "oracle": "background-target-restart.json",
+      "evidence": "process-restart",
+      "unclean_shutdown_marker": false,
+      "min_objects": 9,
+      "max_objects": 65,
+      "topology": {"nodes": 4, "drives_per_node": 1},
+      "scope": "Target process restart, exact unversioned S3 bodies and replacement-disk shards; not power loss or EC8+4."
+    },
+    "background-target-crash": {
+      "gate": "G14",
+      "task": "W21",
+      "lane": "e2e-nightly",
+      "suite": "e2e_test",
+      "name": "heal_erasure_disk_rebuild_test::tests::test_cluster_root_heal_recovers_remote_shards_after_background_target_crash",
+      "oracle": "background-target-crash.json",
+      "evidence": "process-crash-restart",
+      "unclean_shutdown_marker": true,
+      "min_objects": 9,
+      "max_objects": 65,
+      "topology": {"nodes": 4, "drives_per_node": 1},
+      "scope": "Target process killed during partial background rebuild, real unclean-shutdown marker, exact unversioned S3 bodies and replacement-disk shards; not power loss or EC8+4."
+    }
+  },
+  "release_pending": {
+    "G01": "W02/W04 complete root and quota authority coverage",
+    "G02": "W03 bounded checkpoint progress and independent version inventory",
+    "G03": "W17/W18 exact scoped ACK with durable publication and mixed peers",
+    "G04": "W03/W15/W16 crash at every cache/root/floor/intent boundary",
+    "G05": "W06/W07 per-object outcomes and bounded terminal retention",
+    "G06": "W06/W08/W23 concurrent status, legacy clients and truncation",
+    "G07": "W12/W13/W14 durable MRF responsibility at every commit boundary",
+    "G08": "W12/W13/W14 MRF capacity, disk-full and replica-loss matrix",
+    "G09": "W13/W18/W23 actual mixed-version reader/writer and rollback payloads",
+    "G10": "W05/W09/W10/W11 bounded scheduling and pressure recovery",
+    "G11": "W04/W19/W24 maintenance and complete producer coverage",
+    "G12": "W02/W15/W16 both quota paths during reset and settlement",
+    "G13": "W07/W14 quorum-minus-one, unknown disks, remount, Object Lock, dry-run, grace and commit tail",
+    "G14": "W20/W21 same-window field evidence; 3x4 EC8+4 and multi-set/pool coverage",
+    "P1": "W20 measured cold-walk share and foreground latency/throughput",
+    "P2": "W20/W24 measured post-stop convergence and cold segment reuse",
+    "P3": "W20 measured two-hour pressure/heal capacity and recovery window",
+    "P4": "W20 measured MRF scale and replay cost with retained responsibility",
+    "R-E": "W03/W05 fixed-budget real process restart through enumeration and classification",
+    "R-D": "W07/W14 manager-to-event-to-ledger exact disposition, including grace",
+    "R-L": "W13/W14 legacy source conflicts, migration gaps and crash-safe source retirement"
+  }
+}
@@ -0,0 +1,120 @@
+# Copyright 2024 RustFS Team
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Quick Checks
+description: Run the shared compile-free RustFS quality checks.
+
+runs:
+  using: composite
+  steps:
+    - name: Install quality tools
+      uses: taiki-e/install-action@bffeee26d4db9be238a4ea78d8826604ebcb594d # v2
+      with:
+        tool: |
+          ripgrep@15.2.0
+          shellcheck@0.11.0
+
+    - name: Install actionlint
+      shell: bash
+      run: |
+        actionlint_dir="$(mktemp -d "${RUNNER_TEMP}/actionlint.XXXXXX")"
+        curl --fail --location --silent --show-error \
+          --output "$actionlint_dir/actionlint.tar.gz" \
+          https://github.com/rhysd/actionlint/releases/download/v1.7.12/actionlint_1.7.12_linux_amd64.tar.gz
+        echo "8aca8db96f1b94770f1b0d72b6dddcb1ebb8123cb3712530b08cc387b349a3d8  $actionlint_dir/actionlint.tar.gz" | sha256sum --check --status
+        tar -xzf "$actionlint_dir/actionlint.tar.gz" -C "$actionlint_dir" actionlint
+        rm "$actionlint_dir/actionlint.tar.gz"
+        echo "$actionlint_dir" >> "$GITHUB_PATH"
+
+    - name: Install Rust toolchain
+      uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8 # stable
+      with:
+        components: rustfmt
+
+    - name: Check workflow syntax and shell scripts
+      shell: bash
+      run: shellcheck --version && actionlint
+
+    - name: Check code formatting
+      shell: bash
+      run: cargo fmt --all --check
+
+    - name: Check unsafe code allowances
+      shell: bash
+      run: ./scripts/check_unsafe_code_allowances.sh
+
+    - name: Check layered dependencies
+      shell: bash
+      run: ./scripts/check_layer_dependencies.sh
+
+    - name: Check architecture migration rules
+      shell: bash
+      run: ./scripts/check_architecture_migration_rules.sh
+
+    - name: Check logging guardrails
+      shell: bash
+      run: ./scripts/check_logging_guardrails.sh
+
+    - name: Check error other(format!) ratchet
+      shell: bash
+      run: ./scripts/check_error_other_format_ratchet.sh
+
+    - name: Check tokio io-uring feature guard
+      shell: bash
+      run: ./scripts/check_no_tokio_io_uring.sh
+
+    - name: Check extension schema boundaries
+      shell: bash
+      run: ./scripts/check_extension_schema_boundaries.sh
+
+    - name: Check body-cache whitelist guard
+      shell: bash
+      run: ./scripts/check_body_cache_whitelist.sh
+
+    - name: Check s3s footprint ratchet
+      shell: bash
+      run: ./scripts/check_s3s_footprint.sh
+
+    - name: Check cryptographic capability wording
+      shell: bash
+      run: ./scripts/check_fips_wording.sh
+
+    - name: Check no embedded secret material
+      shell: bash
+      run: ./scripts/check_embedded_secrets.sh
+
+    - name: Run script contract tests
+      shell: bash
+      run: make script-tests
+
+    - name: Check test wiring
+      shell: bash
+      run: |
+        python3 ./scripts/check_test_wiring.py --self-test
+        python3 ./scripts/check_scheduled_validation_freshness.py --self-test
+        python3 ./scripts/test_security_workflow.py
+        python3 ./scripts/test_nightly_candidate.py
+        python3 ./scripts/check_test_wiring.py
+
+    - name: Check no planning docs committed
+      shell: bash
+      run: ./scripts/check_no_planning_docs.sh
+
+    - name: Check CI paths stay in sync
+      shell: bash
+      run: ./scripts/check_ci_paths_sync.sh
+
+    - name: Check io_uring lane --lib precondition
+      shell: bash
+      run: ./scripts/check_uring_lane_lib_only.sh
@@ -4,6 +4,11 @@
  { "workflow": ".github/workflows/ci.yml", "max_age_hours": 192 },
  { "workflow": ".github/workflows/coverage.yml", "max_age_hours": 192 },
  { "workflow": ".github/workflows/e2e-replication-nightly.yml", "max_age_hours": 36 },
+  {
+    "workflow": ".github/workflows/e2e-distributed.yml",
+    "max_age_hours": 36,
+    "never_ran_grace_until": "2026-09-18T00:00:00Z"
+  },
  { "workflow": ".github/workflows/e2e-s3tests.yml", "max_age_hours": 192 },
  { "workflow": ".github/workflows/fuzz.yml", "max_age_hours": 36 },
  { "workflow": ".github/workflows/mint.yml", "max_age_hours": 192 },
@@ -12,24 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.

-# Companion to ci.yml for required status checks.
-#
-# ci.yml skips docs-only pull requests via paths-ignore, but the branch ruleset
-# requires a check named "Test and Lint" — without this workflow a docs-only PR
-# would wait on it forever. This workflow triggers on exactly the paths ci.yml
-# ignores and reports success under the same job name. Mixed PRs trigger both
-# workflows and the real check still gates: a required check with any failing
-# run blocks the merge.
-# https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/defining-the-mergeability-of-pull-requests/troubleshooting-required-status-checks#handling-skipped-but-required-checks
-#
-# "Quick Checks" is mirrored here ahead of the ruleset change that will make it
-# required too (rustfs/backlog#1599). Until that change lands this job is
-# inert; mirroring it first is what lets the ruleset change happen without
-# stranding docs-only PRs on a check nobody reports.
-#
-# Keep the paths list below in sync with the pull_request paths-ignore list
-# in ci.yml, and keep the quick-checks steps below byte-identical to the
-# quick-checks job in ci.yml.
+# Reports the existing required checks for paths excluded by ci.yml.
+# Mixed PRs can trigger both workflows; their Quick Checks jobs use one shared
+# action to keep validation coverage aligned. Keep this paths list in sync with
+# ci.yml's pull_request.paths-ignore via scripts/check_ci_paths_sync.sh.

 name: Continuous Integration (docs only)

@@ -59,19 +45,6 @@ permissions:
  contents: read

 jobs:
-  # Deliberately NOT a bare `echo`. Once "Quick Checks" becomes a required
-  # check, ci.yml gates every expensive job behind it, so a mixed PR reports
-  # two check runs with this name: the real one (45-51s) and this companion.
-  # GitHub has no written contract for how it picks between same-named
-  # required check runs ("latest wins" vs "any failure blocks"), so instead of
-  # relying on ordering we make both runs execute the same commands against
-  # the same merge ref — their conclusions are then necessarily identical and
-  # the choice does not matter. Keep these steps byte-identical to the
-  # quick-checks job in ci.yml (a guard script that asserts this, and the paths
-  # sync below, is tracked in rustfs/backlog#1603).
-  #
-  # For a genuinely docs-only PR this adds no strictness (no code changed, so
-  # fmt and the guards always pass) and costs ~50s of ubuntu-latest.
  quick-checks:
    name: Quick Checks
    runs-on: ubuntu-latest
@@ -82,64 +55,8 @@ jobs:
        with:
          persist-credentials: false

-      - name: Install ripgrep
-        uses: taiki-e/install-action@bffeee26d4db9be238a4ea78d8826604ebcb594d # v2
-        with:
-          tool: ripgrep@15.2.0
-
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8 # stable
-        with:
-          components: rustfmt
-
-      - name: Check code formatting
-        run: cargo fmt --all --check
-
-      - name: Check unsafe code allowances
-        run: ./scripts/check_unsafe_code_allowances.sh
-
-      - name: Check layered dependencies
-        run: ./scripts/check_layer_dependencies.sh
-
-      - name: Check architecture migration rules
-        run: ./scripts/check_architecture_migration_rules.sh
-
-      - name: Check logging guardrails
-        run: ./scripts/check_logging_guardrails.sh
-
-      - name: Check tokio io-uring feature guard
-        run: ./scripts/check_no_tokio_io_uring.sh
-
-      - name: Check extension schema boundaries
-        run: ./scripts/check_extension_schema_boundaries.sh
-
-      - name: Check body-cache whitelist guard
-        run: ./scripts/check_body_cache_whitelist.sh
-
-      - name: Check s3s footprint ratchet
-        run: ./scripts/check_s3s_footprint.sh
-
-      - name: Check cryptographic capability wording
-        run: ./scripts/check_fips_wording.sh
-
-      - name: Check no embedded secret material
-        run: ./scripts/check_embedded_secrets.sh
-
-      - name: Check test wiring
-        run: |
-          python3 ./scripts/check_test_wiring.py --self-test
-          python3 ./scripts/check_scheduled_validation_freshness.py --self-test
-          python3 ./scripts/test_security_workflow.py
-          python3 ./scripts/check_test_wiring.py
-
-      - name: Check no planning docs committed
-        run: ./scripts/check_no_planning_docs.sh
-
-      - name: Check CI paths stay in sync
-        run: ./scripts/check_ci_paths_sync.sh
-
-      - name: Check io_uring lane --lib precondition
-        run: ./scripts/check_uring_lane_lib_only.sh
+      - name: Run shared quick checks
+        uses: ./.github/actions/quick-checks

  test-and-lint:
    name: Test and Lint
@@ -100,12 +100,7 @@ jobs:
      - name: Typos check with custom config file
        uses: crate-ci/typos@37bb98842b0d8c4ffebdb75301a13db0267cef89 # master

-  # Fast, compile-free checks that fail early so contributors get feedback in
-  # ~1 minute instead of waiting for the full test job.
-  #
-  # These steps are mirrored byte-for-byte in ci-docs-only.yml so that a mixed
-  # PR, which reports two check runs named "Quick Checks", cannot get one red
-  # and one green. Edit both jobs together.
+  # Fail early with compile-free checks shared with docs-only CI.
  quick-checks:
    name: Quick Checks
    if: github.event_name != 'pull_request' || github.event.action != 'closed'
@@ -117,67 +112,8 @@ jobs:
        with:
          persist-credentials: false

-      - name: Install ripgrep
-        uses: taiki-e/install-action@bffeee26d4db9be238a4ea78d8826604ebcb594d # v2
-        with:
-          tool: ripgrep@15.2.0
-
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8 # stable
-        with:
-          components: rustfmt
-
-      - name: Check code formatting
-        run: cargo fmt --all --check
-
-      - name: Check unsafe code allowances
-        run: ./scripts/check_unsafe_code_allowances.sh
-
-      - name: Check layered dependencies
-        run: ./scripts/check_layer_dependencies.sh
-
-      - name: Check architecture migration rules
-        run: ./scripts/check_architecture_migration_rules.sh
-
-      - name: Check logging guardrails
-        run: ./scripts/check_logging_guardrails.sh
-
-      - name: Check error other(format!) ratchet
-        run: ./scripts/check_error_other_format_ratchet.sh
-
-      - name: Check tokio io-uring feature guard
-        run: ./scripts/check_no_tokio_io_uring.sh
-
-      - name: Check extension schema boundaries
-        run: ./scripts/check_extension_schema_boundaries.sh
-
-      - name: Check body-cache whitelist guard
-        run: ./scripts/check_body_cache_whitelist.sh
-
-      - name: Check s3s footprint ratchet
-        run: ./scripts/check_s3s_footprint.sh
-
-      - name: Check cryptographic capability wording
-        run: ./scripts/check_fips_wording.sh
-
-      - name: Check no embedded secret material
-        run: ./scripts/check_embedded_secrets.sh
-
-      - name: Check test wiring
-        run: |
-          python3 ./scripts/check_test_wiring.py --self-test
-          python3 ./scripts/check_scheduled_validation_freshness.py --self-test
-          python3 ./scripts/test_security_workflow.py
-          python3 ./scripts/check_test_wiring.py
-
-      - name: Check no planning docs committed
-        run: ./scripts/check_no_planning_docs.sh
-
-      - name: Check CI paths stay in sync
-        run: ./scripts/check_ci_paths_sync.sh
-
-      - name: Check io_uring lane --lib precondition
-        run: ./scripts/check_uring_lane_lib_only.sh
+      - name: Run shared quick checks
+        uses: ./.github/actions/quick-checks

  test-and-lint:
    name: Test and Lint
@@ -914,6 +850,17 @@ jobs:
          cache-save-if: 'false'
          install-build-packaging-tools: 'false'

+      - name: Install network fault-injection tools
+        run: |
+          sudo apt-get install -y iptables
+          sudo -n iptables --version
+          # The endpoint-blackhole heal scenario needs CAP_NET_ADMIN. Containerised
+          # runners can run iptables but not touch the rule set; the test then logs
+          # a skip instead of failing, so surface that here where it is visible.
+          if ! sudo -n iptables -w 5 -S OUTPUT >/dev/null 2>&1; then
+            echo "::warning::iptables cannot read the OUTPUT chain on this runner (no CAP_NET_ADMIN); the endpoint-blackhole heal scenario will be skipped"
+          fi
+
      - name: Set up Python
        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
        with:
@@ -121,6 +121,22 @@ jobs:
          create_latest=false
          source_ref="$GITHUB_SHA"

+          # Pre-GA policy: until the first stable (vX.Y.Z) tag exists, every
+          # prerelease (alpha/beta/rc) also moves `latest`, so users pulling
+          # `latest` get the newest test build. Once a stable tag is published
+          # this returns false and `latest` follows stable releases only.
+          prerelease_moves_latest() {
+            local stable_tags
+            stable_tags=$(git ls-remote --tags --refs origin 2>/dev/null \
+              | awk '{print $2}' \
+              | grep -E '^refs/tags/v?[0-9]+\.[0-9]+\.[0-9]+$' || true)
+            if [[ -z "$stable_tags" ]]; then
+              return 0
+            fi
+            echo "ℹ️  Stable release tag(s) already exist; prereleases no longer update latest"
+            return 1
+          }
+
          if [[ "${{ github.event_name }}" == "workflow_run" ]]; then
            # Triggered by build workflow completion
            echo "🔗 Triggered by build workflow completion"
@@ -184,8 +200,8 @@ jobs:
                if [[ "$version" == *"alpha"* ]] || [[ "$version" == *"beta"* ]] || [[ "$version" == *"rc"* ]]; then
                  build_type="prerelease"
                  is_prerelease=true
-                  # Current policy: create latest tags for stable releases and selected prereleases (alpha/beta).
-                  if [[ "$version" == *"alpha"* ]] || [[ "$version" == *"beta"* ]]; then
+                  # Pre-GA policy: prereleases update latest until the first stable tag exists.
+                  if prerelease_moves_latest; then
                    create_latest=true
                    echo "🧪 Building Docker image for prerelease: $version (creating latest tag)"
                  else
@@ -243,8 +259,8 @@ jobs:
              v*alpha*|v*beta*|v*rc*|*alpha*|*beta*|*rc*)
                build_type="prerelease"
                is_prerelease=true
-                # Current policy: create latest tags for stable releases and selected prereleases (alpha/beta).
-                if [[ "$version" == *"alpha"* ]] || [[ "$version" == *"beta"* ]]; then
+                # Pre-GA policy: prereleases update latest until the first stable tag exists.
+                if prerelease_moves_latest; then
                  create_latest=true
                  echo "🧪 Building with prerelease version: $input_version (creating latest tag)"
                else
@@ -394,11 +410,13 @@ jobs:
          TAG_BASE="${VERSION}${VARIANT_SUFFIX}"
          TAGS="${{ env.REGISTRY_DOCKERHUB }}:$TAG_BASE,${{ env.REGISTRY_GHCR }}:$TAG_BASE,${{ env.REGISTRY_QUAY }}:$TAG_BASE"

-          # Add channel tags for prereleases and latest for stable
+          # Add latest when requested (stable releases, and prereleases before GA)
          if [[ "$CREATE_LATEST" == "true" ]]; then
-            # Create latest tags for stable releases and selected prereleases when CREATE_LATEST=true.
            TAGS="$TAGS,${{ env.REGISTRY_DOCKERHUB }}:latest${VARIANT_SUFFIX},${{ env.REGISTRY_GHCR }}:latest${VARIANT_SUFFIX},${{ env.REGISTRY_QUAY }}:latest${VARIANT_SUFFIX}"
-          elif [[ "$BUILD_TYPE" == "prerelease" ]]; then
+          fi
+
+          # Always add the channel tag for prereleases, independent of latest
+          if [[ "$BUILD_TYPE" == "prerelease" ]]; then
            # Prerelease channel tags (alpha, beta, rc)
            if [[ "$VERSION" == *"alpha"* ]]; then
              CHANNEL="alpha"
@@ -555,7 +573,7 @@ jobs:
            "prerelease")
              echo "🧪 Prerelease Docker image has been built with ${VERSION} tags"
              echo "⚠️  This is a prerelease image - use with caution"
-              # Create latest tags for stable releases and selected prereleases when CREATE_LATEST=true.
+              # Prereleases move latest until the first stable tag exists (pre-GA policy).
              if [[ "$CREATE_LATEST" == "true" ]]; then
                echo "🏷️  Latest tag has been created for prerelease: $VERSION"
              else
@@ -0,0 +1,216 @@
+# Copyright 2024 RustFS Team
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# 4-node 4-disk distributed e2e lane.
+#
+# Each selected test starts a real localhost cluster via
+# `RustFSTestClusterEnvironment` (4 processes; 4 drives per node unless the
+# case is a two-site 4-node 1-drive pair or a 4-node upgrade). Membership is
+# `[profile.e2e-distributed]` in `.config/nextest.toml`. Storage-sensitive PRs,
+# nightly runs, and manual dispatches all execute the same fail-closed suite.
+# Upgrade cases download the same pinned previous release as e2e-upgrade.yml.
+#
+# Isolated pool filesystems: expand/decommission/rebalance cases require
+# independent `statfs` capacity. This job runs on GitHub-hosted
+# `ubuntu-latest` because the self-hosted `sm-standard-4` ARC pods cannot
+# create filesystems: `mount -o loop` fails with ENOENT (no
+# `/dev/loop-control`), and `mount -t tmpfs` fails with "cannot mount tmpfs
+# read-only" (no `CAP_SYS_ADMIN` in the initial namespace). The same reason
+# `uring-integration` and `e2e-s3tests.yml` left that label. The prepare
+# step mounts four 1 GiB tmpfs instances and exports `RUSTFS_E2E_POOL_ROOTS`.
+
+name: e2e-distributed
+
+on:
+  pull_request:
+    paths:
+      - "Cargo.lock"
+      - "Cargo.toml"
+      - ".config/nextest.toml"
+      - ".github/workflows/e2e-distributed.yml"
+      - "crates/audit/**"
+      - "crates/common/**"
+      - "crates/config/**"
+      - "crates/e2e_test/**"
+      - "crates/ecstore/**"
+      - "crates/filemeta/**"
+      - "crates/heal/**"
+      - "crates/iam/**"
+      - "crates/lock/**"
+      - "crates/madmin/**"
+      - "crates/notify/**"
+      - "crates/replication/**"
+      - "crates/s3-client/**"
+      - "crates/s3-ops/**"
+      - "crates/s3-types/**"
+      - "crates/scanner/**"
+      - "crates/storage-api/**"
+      - "crates/utils/**"
+      - "rustfs/**"
+  workflow_dispatch:
+    inputs:
+      filter:
+        description: "Optional nextest -E filter (default: the whole e2e-distributed profile)"
+        required: false
+        default: ""
+  schedule:
+    # 05:53 UTC nightly — clear of e2e-nightly (04:29) and ODM interop (05:23).
+    - cron: "53 5 * * *"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name != 'schedule' }}
+
+jobs:
+  distributed:
+    name: Distributed 4-node 4-disk e2e
+    # GitHub-hosted VM: loop and tmpfs mounts work here. sm-standard-4 is an
+    # ARC pod and rejects both (`mount -o loop` ENOENT, tmpfs "read-only").
+    runs-on: ubuntu-latest
+    timeout-minutes: 180
+    env:
+      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+      NO_PROXY: 127.0.0.1,localhost
+      HTTP_PROXY: ""
+      HTTPS_PROXY: ""
+      # Pinned previous release used by distributed::upgrade_test (same pin as e2e-upgrade.yml).
+      UPGRADE_SOURCE_VERSION: 1.0.0-rc.2
+      UPGRADE_SOURCE_ASSET: rustfs-linux-x86_64-gnu-v1.0.0-rc.2.zip
+      UPGRADE_SOURCE_SHA256: 7c789386bf85278f865b8e0d359bf4edb84d5aa408cc3fa54a18c25ca74cd6e7
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Setup Rust environment
+        uses: ./.github/actions/setup
+        with:
+          rust-version: stable
+          # Dedicated key: ubuntu-latest and sm-standard-4 share runner.os, so
+          # a shared key would mix VM and ARC pod target/ artifacts.
+          cache-shared-key: ci-e2e-distributed-hosted
+          cache-save-if: ${{ github.ref == 'refs/heads/main' }}
+          install-build-packaging-tools: 'false'
+
+      - name: Prepare isolated filesystems for pool movement
+        run: |
+          set -euo pipefail
+          mount_base="${RUNNER_TEMP}/rustfs-e2e-pools"
+          mkdir -p "${mount_base}"
+          roots=()
+          for pool in 0 1 2 3; do
+            mountpoint="${mount_base}/pool-${pool}"
+            mkdir -p "${mountpoint}"
+            # Sized tmpfs reports a distinct st_dev and independent 1G
+            # statfs capacity. Requires a VM runner (ubuntu-latest).
+            if ! sudo mount -t tmpfs -o size=1G,nosuid,nodev,mode=1777 tmpfs "${mountpoint}"; then
+              echo "tmpfs mount failed on $(uname -a)" >&2
+              findmnt || true
+              grep Cap /proc/self/status || true
+              exit 1
+            fi
+            sudo chmod 1777 "${mountpoint}"
+            roots+=("${mountpoint}")
+          done
+          printf -v joined_roots '%s:' "${roots[@]}"
+          echo "RUSTFS_E2E_POOL_ROOTS=${joined_roots%:}" >> "${GITHUB_ENV}"
+          findmnt --noheadings --output TARGET,SOURCE,FSTYPE,SIZE --target "${roots[0]}"
+          findmnt --noheadings --output TARGET,SOURCE,FSTYPE,SIZE --target "${roots[1]}"
+          findmnt --noheadings --output TARGET,SOURCE,FSTYPE,SIZE --target "${roots[2]}"
+          findmnt --noheadings --output TARGET,SOURCE,FSTYPE,SIZE --target "${roots[3]}"
+
+      - name: Download pinned previous release
+        env:
+          SOURCE_DIR: ${{ runner.temp }}/rustfs-upgrade-source
+        run: |
+          set -euo pipefail
+          mkdir -p "$SOURCE_DIR"
+          archive="$SOURCE_DIR/$UPGRADE_SOURCE_ASSET"
+          curl --fail --location --retry 3 --output "$archive" \
+            "https://github.com/${GITHUB_REPOSITORY}/releases/download/${UPGRADE_SOURCE_VERSION}/${UPGRADE_SOURCE_ASSET}"
+          echo "$UPGRADE_SOURCE_SHA256  $archive" | sha256sum --check --strict
+          unzip -q "$archive" -d "$SOURCE_DIR"
+          chmod +x "$SOURCE_DIR/rustfs"
+          test -x "$SOURCE_DIR/rustfs"
+          echo "RUSTFS_UPGRADE_SOURCE_BINARY=$SOURCE_DIR/rustfs" >> "$GITHUB_ENV"
+
+      - name: Build rustfs binary
+        run: |
+          cargo build -p rustfs --bins
+          : > target/debug/rustfs.features
+
+      - name: Verify distributed e2e membership
+        env:
+          NEXTEST_LISTING: ${{ runner.temp }}/rustfs-e2e-distributed-list.json
+        run: |
+          cargo nextest list --profile e2e-distributed -p e2e_test --message-format json > "${NEXTEST_LISTING}"
+          python3 ./scripts/check_test_wiring.py --check-profile e2e-distributed "${NEXTEST_LISTING}"
+
+      - name: Run distributed 4-node e2e suite
+        env:
+          RUSTFS_E2E_LOG_DIR: ${{ runner.temp }}/rustfs-e2e-distributed-logs
+          FILTER: ${{ inputs.filter }}
+        run: |
+          set -euo pipefail
+          if [ -n "${FILTER}" ]; then
+            cargo nextest run --profile e2e-distributed -p e2e_test -E "${FILTER}"
+          else
+            cargo nextest run --profile e2e-distributed -p e2e_test --no-tests=fail
+          fi
+
+      - name: Upload distributed e2e diagnostics
+        if: always()
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        with:
+          name: e2e-distributed-${{ github.run_number }}
+          path: |
+            target/nextest/e2e-distributed/junit.xml
+            ${{ runner.temp }}/rustfs-e2e-distributed-list.json
+            ${{ runner.temp }}/rustfs-e2e-distributed-logs/
+          retention-days: 7
+          if-no-files-found: warn
+
+      - name: Unmount isolated pool filesystems
+        if: always()
+        run: |
+          set -euo pipefail
+          mount_base="${RUNNER_TEMP}/rustfs-e2e-pools"
+          for pool in 0 1 2 3; do
+            mountpoint="${mount_base}/pool-${pool}"
+            if mountpoint --quiet "${mountpoint}"; then
+              sudo umount "${mountpoint}"
+            fi
+          done
+
+  alert-on-failure:
+    name: Alert on scheduled failure
+    needs: [distributed]
+    if: always() && github.event_name == 'schedule' && contains(needs.*.result, 'failure')
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      issues: write
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+      - name: Open or update failure-tracking issue
+        uses: ./.github/actions/schedule-failure-issue
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -19,7 +19,9 @@ on:
    paths:
      - ".github/workflows/e2e-upgrade.yml"
      - "crates/e2e_test/src/common.rs"
+      - "crates/e2e_test/src/fake_s3_target/**"
      - "crates/e2e_test/src/lib.rs"
+      - "crates/e2e_test/src/replication_extension_test.rs"
      - "crates/e2e_test/src/upgrade_compatibility_test.rs"
      - "crates/ecstore/**"
      - "crates/filemeta/**"
@@ -44,9 +46,9 @@ concurrency:
 env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1
-  UPGRADE_SOURCE_VERSION: 1.0.0-rc.2
-  UPGRADE_SOURCE_ASSET: rustfs-linux-x86_64-gnu-v1.0.0-rc.2.zip
-  UPGRADE_SOURCE_SHA256: 7c789386bf85278f865b8e0d359bf4edb84d5aa408cc3fa54a18c25ca74cd6e7
+  UPGRADE_SOURCE_VERSION: 1.0.0-rc.5
+  UPGRADE_SOURCE_ASSET: rustfs-linux-x86_64-gnu-v1.0.0-rc.5.zip
+  UPGRADE_SOURCE_SHA256: 3ee8df71e8edcfada533be452c4135868f697bc515460ae97b027313eade7a3d

 jobs:
  upgrade:
@@ -55,14 +57,31 @@ jobs:
      fail-fast: false
      matrix:
        include:
-          - name: Direct upgrade from rc.2
+          # The two `_from_rc2_` tests keep their names: they assert
+          # release-independent object contracts and pass unchanged against the
+          # newer pinned source, so renaming them would only churn history and
+          # the CI required-check names. UPGRADE_SOURCE_VERSION above is the
+          # single source of truth for which release they actually run against.
+          - name: Direct upgrade from the previous release
            cache_key: e2e-direct-upgrade
            test: direct_upgrade_from_rc2_preserves_object_contracts
            artifact: direct-upgrade
-          - name: Mixed-version rolling upgrade from rc.2
+          - name: Mixed-version rolling upgrade from the previous release
            cache_key: e2e-mixed-version-upgrade
            test: rolling_upgrade_from_rc2_preserves_mixed_version_contracts
            artifact: mixed-version-upgrade
+          - name: Bucket configuration survives the upgrade
+            cache_key: e2e-bucket-config-upgrade
+            test: direct_upgrade_from_previous_release_preserves_bucket_configuration
+            artifact: bucket-config-upgrade
+          - name: Rollback reads current bucket metadata
+            cache_key: e2e-bucket-config-rollback
+            test: rollback_to_previous_release_reads_current_bucket_metadata
+            artifact: bucket-config-rollback
+          - name: ODM configuration recovery after rc.5 rollback
+            cache_key: e2e-odm-config-rollback
+            test: rc5_rollback_requires_restoring_odm_configuration
+            artifact: odm-config-rollback
    runs-on: ubuntu-latest
    timeout-minutes: 60
    env:
@@ -166,8 +166,9 @@ jobs:
      # e.g. https://dl.rustfs.com/artifacts/rustfs/packages/nightly/... .
      # Skipped when the R2 secrets are not configured (artifact-only mode).
      - name: Upload DEB to Cloudflare R2
-        if: env.R2_ACCESS_KEY_ID != ''
+        id: publish
        env:
+          DEB_FILE: ${{ steps.deb.outputs.deb_file }}
          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
@@ -182,28 +183,70 @@ jobs:
            exit 0
          fi

-          if ! command -v aws >/dev/null 2>&1; then
-            sudo apt-get update && sudo apt-get install -y -qq awscli
-          fi
-
          export AWS_ACCESS_KEY_ID="$R2_ACCESS_KEY_ID"
          export AWS_SECRET_ACCESS_KEY="$R2_SECRET_ACCESS_KEY"
          export AWS_DEFAULT_REGION="auto"

-          DEB_FILE="${{ steps.deb.outputs.deb_file }}"
+          SOURCE_SHA="$(git rev-parse HEAD)"
+          if [[ "${SOURCE_SHA}" != "${GITHUB_SHA}" ]]; then
+            echo "Checkout SHA does not match the nightly build run" >&2
+            exit 1
+          fi
+          DEB_SHA256="$(sha256sum "${DEB_FILE}" | cut -d ' ' -f 1)"
+          CANDIDATE_KEY="artifacts/rustfs/packages/nightly/runs/${GITHUB_RUN_ID}/${GITHUB_RUN_ATTEMPT}/${DEB_SHA256}/rustfs.deb"
+          CANDIDATE_URL="https://dl.rustfs.com/${CANDIDATE_KEY}"
+
+          # Old AWS CLI models lack conditional PutObject support. Never fall
+          # back to an overwriting upload for a candidate.
+          AWS_CLI=aws
+          if ! "${AWS_CLI}" s3api put-object --generate-cli-skeleton input | jq -e 'has("IfNoneMatch")' >/dev/null; then
+            sudo apt-get update
+            sudo apt-get install -y -qq python3-venv
+            AWS_CLI_DIR="$(mktemp -d "${RUNNER_TEMP}/nightly-awscli.XXXXXX")"
+            trap 'rm -rf "${AWS_CLI_DIR}"' EXIT
+            python3 -m venv "${AWS_CLI_DIR}"
+            "${AWS_CLI_DIR}/bin/python" -m pip install --disable-pip-version-check 'awscli==1.44.79'
+            AWS_CLI="${AWS_CLI_DIR}/bin/aws"
+          fi
+          "${AWS_CLI}" s3api put-object --generate-cli-skeleton input | jq -e 'has("IfNoneMatch")' >/dev/null
+          "${AWS_CLI}" --version
+          "${AWS_CLI}" s3api put-object --bucket "${R2_BUCKET}" --key "${CANDIDATE_KEY}" \
+            --body "${DEB_FILE}" --if-none-match '*' --endpoint-url "${R2_ENDPOINT}"
+          PUBLISHED_SHA256="$(curl -fsSL --retry 3 --connect-timeout 15 --max-time 300 "${CANDIDATE_URL}" | sha256sum | cut -d ' ' -f 1)"
+          if [[ "${PUBLISHED_SHA256}" != "${DEB_SHA256}" ]]; then
+            echo "Published candidate checksum does not match the built package" >&2
+            exit 1
+          fi
+
          R2_PREFIX="s3://${R2_BUCKET}/artifacts/rustfs/packages/nightly/"

          echo "📤 Uploading ${DEB_FILE} to ${R2_PREFIX}"
-          aws s3 cp "${DEB_FILE}" "${R2_PREFIX}" --endpoint-url "$R2_ENDPOINT" --only-show-errors
+          "${AWS_CLI}" s3 cp "${DEB_FILE}" "${R2_PREFIX}" --endpoint-url "$R2_ENDPOINT" --only-show-errors

          # Stable "latest" alias so tests can fetch the newest nightly
          # without knowing today's date.
          echo "📤 Uploading latest alias"
-          aws s3 cp "${DEB_FILE}" "${R2_PREFIX}rustfs-nightly-latest.deb" \
+          "${AWS_CLI}" s3 cp "${DEB_FILE}" "${R2_PREFIX}rustfs-nightly-latest.deb" \
            --endpoint-url "$R2_ENDPOINT" --only-show-errors

          echo "✅ R2 upload complete"

+          CANDIDATE_FILE="${RUNNER_TEMP}/nightly-candidate-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}.json"
+          jq -n --arg source_sha "${SOURCE_SHA}" \
+            --argjson build_run_id "${GITHUB_RUN_ID}" --argjson build_run_attempt "${GITHUB_RUN_ATTEMPT}" \
+            --arg package_url "${CANDIDATE_URL}" --arg package_sha256 "${DEB_SHA256}" \
+            '{schema: 1, source_sha: $source_sha, build_run_id: $build_run_id, build_run_attempt: $build_run_attempt, package_url: $package_url, package_sha256: $package_sha256}' \
+            > "${CANDIDATE_FILE}"
+          echo "candidate_file=${CANDIDATE_FILE}" >> "${GITHUB_OUTPUT}"
+
+      - name: Upload nightly candidate manifest
+        if: ${{ steps.publish.outputs.candidate_file != '' }}
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        with:
+          name: nightly-candidate-${{ github.run_id }}-${{ github.run_attempt }}
+          path: ${{ steps.publish.outputs.candidate_file }}
+          if-no-files-found: error
+
  # Live-Vault lane for the rustfs-kms suite (rustfs/backlog#1774).
  #
  # RUSTFS_KMS_VAULT_TOKEN is the single switch that adds the Vault KV2 and
@@ -14,8 +14,8 @@

 # Functional chain driver: runs the ten functional suites in a fixed order
 # (upgrade -> s3 -> kms -> tier -> storage -> heal -> pool -> security ->
-# replication, with performance on its own runner in parallel) and guarantees
-# the chain keeps moving even when individual suites fail.
+# replication -> performance). Each suite attempts the next handoff even
+# when its tests fail.
 #
 # Each suite workflow can still be dispatched standalone (workflow_dispatch);
 # only chain-triggered runs forward to the next suite via repository_dispatch,
@@ -59,16 +59,3 @@ jobs:
          gh api --method POST repos/rustfs/rustfs/dispatches \
            -f event_type='rustfs-chain-upgrade' \
            -F 'client_payload[from_suite]=nightly-build'
-
-      - name: Dispatch performance suite (parallel, own runner)
-        env:
-          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
-        run: |
-          set -euo pipefail
-          if [ -z "${GH_TOKEN:-}" ]; then
-            echo "PF_TESTING_GH_TOKEN is not configured; cannot dispatch performance" >&2
-            exit 1
-          fi
-          gh api --method POST repos/rustfs/rustfs/dispatches \
-            -f event_type='rustfs-chain-performance' \
-            -F 'client_payload[from_suite]=nightly-build'
@@ -54,14 +54,26 @@ env:
 jobs:
  heal-test:
    runs-on: smoke-testing
-    # Requirement: a failing suite must not fail the workflow; failures
-    # are filed to rustfs/backlog and the chain continues.
-    continue-on-error: true
    timeout-minutes: 480
    # Standalone manual run, or one link of the nightly functional chain
    # (storage -> heal -> pool). Pool expansion no longer re-runs heal.
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-heal-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'RUSTFS_WARP_LOG_FILE=%s/warp.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -117,7 +129,7 @@ jobs:
          else
            ARGS+=(--package-url "${{ env.RUSTFS_NIGHTLY_PACKAGE_URL }}")
          fi
-          ./auto-testing/rustfs_heal_test.sh "${ARGS[@]}"
+          ./auto-testing/rustfs_heal_test.sh "${ARGS[@]}" --log-file "${LOG_FILE}"

      - name: Preflight checks
        run: |
@@ -127,7 +139,7 @@ jobs:
          else
            ARGS+=(--package-url "${{ env.RUSTFS_NIGHTLY_PACKAGE_URL }}")
          fi
-          ./auto-testing/rustfs_heal_test.sh "${ARGS[@]}"
+          ./auto-testing/rustfs_heal_test.sh "${ARGS[@]}" --log-file "${LOG_FILE}"

      - name: Run heal test (write -> outage -> heal -> verify)
        id: test
@@ -137,13 +149,10 @@ jobs:
            --endpoint "${{ env.RUSTFS_API_ENDPOINT }}" \
            --stop-node-gb "${{ inputs.stop_node_gb || '15' }}" \
            --warp-stop-gb "${{ inputs.warp_stop_gb || '40' }}" \
-            --log-file /tmp/rustfs-heal-test.log
+            --log-file "${LOG_FILE}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-heal-test.log
-          REPORT_FILE: /tmp/rustfs-heal-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          PACKAGE_URL='${{ inputs.package_url }}'
@@ -152,8 +161,9 @@ jobs:
          else
            PACKAGE_SOURCE="${RUSTFS_NIGHTLY_PACKAGE_URL}"
          fi
-          STEPS_TABLE="/tmp/rustfs-heal-steps.md"
-          python3 - "${LOG_FILE}" "${STEPS_TABLE}" <<'PY'
+          STEPS_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/steps.md"
+          CASE_RESULT=success
+          python3 - "${LOG_FILE}" "${STEPS_TABLE}" <<'PY' || CASE_RESULT=failure
          import re
          import sys

@@ -165,6 +175,7 @@ jobs:

          steps = {}
          order = []
+          status_rank = {'SKIP': 0, 'PASS': 1, 'FAIL': 2}
          version = None
          version_node = None
          verdict = None
@@ -178,14 +189,15 @@ jobs:
                          n, desc, status = m.group(1), m.group(2), m.group(3)
                          if n not in steps:
                              order.append(n)
-                          steps[n] = (desc, status)  # later lines win (fail after pass)
+                          if n not in steps or status_rank[status] > status_rank[steps[n][1]]:
+                              steps[n] = (desc, status)
                          continue
                      m = ver_re.match(line)
                      if m:
                          version, version_node = m.group(1), m.group(2)
                          continue
                      m = result_re.match(line)
-                      if m:
+                      if m and verdict != 'FAIL':
                          verdict, verdict_detail = m.group(1), m.group(2)
          except FileNotFoundError:
              pass
@@ -205,30 +217,43 @@ jobs:
                  out.write(f'| {n} | {desc} | {status} |\n')
              if not order:
                  out.write('| - | - | NOT RUN (no step result lines found) |\n')
+          complete = set(steps) == {str(n) for n in range(1, 8)}
+          sys.exit(0 if complete and verdict != 'FAIL' and all(status == 'PASS' for _, status in steps.values()) else 1)
          PY
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS heal test report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- Package: ${PACKAGE_SOURCE}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${STEPS_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${STEPS_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial step results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-heal-report.md
          SUITE: heal
        run: |
          set -euo pipefail
@@ -238,28 +263,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'heal'
          SUITE_LABEL: 'Heal'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-heal-report.md'
-          LOG_FILE: '/tmp/rustfs-heal-test.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -287,14 +316,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -310,14 +341,16 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload test logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-heal-test-${{ github.run_id }}
+          name: rustfs-heal-test-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-heal-test*.log
-            /tmp/rustfs-warp.*.log
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/warp.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/steps.md
+          if-no-files-found: error

      - name: Cleanup environment (after)
        if: ${{ always() && inputs.cleanup_after != 'false' }}
@@ -49,10 +49,28 @@ env:
 jobs:
  kms-test:
    runs-on: smoke-testing
-    continue-on-error: true
    timeout-minutes: 420
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Checkout repository (for report parser)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-kms-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -109,9 +127,6 @@ jobs:

      - name: Run KMS suite
        id: test
-        continue-on-error: true
-        env:
-          LOG_FILE: /tmp/rustfs-kms.log
        run: |
          set -euo pipefail
          chmod +x auto-testing/rustfs-kms-test.sh
@@ -141,10 +156,7 @@ jobs:
          ./auto-testing/rustfs-kms-test.sh "${ARGS[@]}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-kms.log
-          REPORT_FILE: /tmp/rustfs-kms-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          PACKAGE_URL='${{ inputs.package_url }}'
@@ -156,79 +168,43 @@ jobs:
          else
            PACKAGE_SOURCE="${RUSTFS_NIGHTLY_PACKAGE_URL}"
          fi
-          CASE_TABLE="/tmp/rustfs-kms-cases.md"
-          python3 - "${LOG_FILE}" "${CASE_TABLE}" <<'PY'
-          import re
-          import sys
-
-          log_file, out_file = sys.argv[1], sys.argv[2]
-          ansi = re.compile(r'\x1b\[[0-9;]*m')
-          start_re = re.compile(r'^---\s+([A-Z]+-[0-9]+)\s+(.+?)\s+---$')
-          done_re = re.compile(r'^\[(PASS|FAIL|UNSUPPORTED)\]\s+([A-Z]+-[0-9]+)\b')
-
-          rows = []
-          index = {}
-          try:
-            with open(log_file, 'r', encoding='utf-8', errors='replace') as fh:
-              for raw in fh:
-                line = ansi.sub('', raw).strip()
-                m = start_re.match(line)
-                if m:
-                  case_id, name = m.group(1), m.group(2)
-                  if case_id not in index:
-                    index[case_id] = len(rows)
-                    rows.append([case_id, name, 'RUNNING'])
-                  continue
-                m = done_re.match(line)
-                if m:
-                  status, case_id = m.group(1), m.group(2)
-                  if case_id in index:
-                    rows[index[case_id]][2] = status
-                  else:
-                    rows.append([case_id, case_id, status])
-                    index[case_id] = len(rows) - 1
-          except FileNotFoundError:
-            rows = []
-
-          counts = {'PASS': 0, 'FAIL': 0, 'UNSUPPORTED': 0, 'RUNNING': 0}
-          for _, _, status in rows:
-            counts[status] = counts.get(status, 0) + 1
-
-          with open(out_file, 'w', encoding='utf-8') as out:
-            out.write('## Case Summary\n\n')
-            out.write(f"- Total: {len(rows)}\\n")
-            out.write(f"- PASS: {counts.get('PASS', 0)}\\n")
-            out.write(f"- FAIL: {counts.get('FAIL', 0)}\\n")
-            out.write(f"- UNSUPPORTED: {counts.get('UNSUPPORTED', 0)}\\n")
-            out.write('\\n')
-            out.write('| Case | Name | Status |\\n')
-            out.write('| --- | --- | --- |\\n')
-            for case_id, name, status in rows:
-              out.write(f'| {case_id} | {name} | {status} |\\n')
-          PY
+          CASE_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/cases.md"
+          CASE_RESULT=success
+          python3 scripts/functional_case_report.py "${LOG_FILE}" "${CASE_TABLE}" || CASE_RESULT=failure
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS KMS test report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- Package: ${PACKAGE_SOURCE}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${CASE_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${CASE_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial case results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-kms-report.md
          SUITE: kms
        run: |
          set -euo pipefail
@@ -238,28 +214,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'kms'
          SUITE_LABEL: 'KMS'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-kms-report.md'
-          LOG_FILE: '/tmp/rustfs-kms.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -287,14 +267,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -310,14 +292,15 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload report and logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-kms-test-${{ github.run_id }}
+          name: rustfs-kms-test-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-kms.log
-            /tmp/rustfs-kms-report.md
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/cases.md
+          if-no-files-found: error

      - name: Cleanup environment (after)
        if: always()
@@ -49,17 +49,16 @@ on:
        type: boolean
        default: true
  repository_dispatch:
-    # Chain entry: dispatched by rustfs-functional-chain.yml (runs on its own
-    # pf-testing runner, in parallel with the shared-VM chain).
+    # Chain handoff: dispatched when the replication suite finishes.
    types: [rustfs-chain-performance]

 permissions:
  contents: read

-# Dedicated pf-testing runner/environment: own concurrency group so perf runs
-# never block (or are blocked by) the pool-expansion / heal tests.
+# The default performance nodes overlap the other suites' remote VMs, even
+# though the runner differs. Hold the shared lock through cleanup as well.
 concurrency:
-  group: rustfs-performance-test
+  group: rustfs-shared-functional-tests
  cancel-in-progress: false

 defaults:
@@ -76,22 +75,33 @@ env:
  # Package used by the nightly run (workflow_dispatch inputs are empty for
  # workflow_run events), i.e. the latest nightly deb published by nightly-gnu.yml.
  RUSTFS_NIGHTLY_PACKAGE_URL: ${{ vars.RUSTFS_NIGHTLY_PACKAGE_URL || 'https://dl.rustfs.com/artifacts/rustfs/packages/nightly/rustfs-nightly-latest.deb' }}
-  # Fixed benchmark result directory so later steps can read summary.md
-  RUSTFS_RESULT_DIR: /tmp/rustfs-perf-results
  # Cross-repo token for uploading reports to rustfs/dashboard (set in repo settings)
  PF_TESTING_GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}

 jobs:
  performance-test:
    runs-on: pf-testing
-    # Requirement: a failing benchmark must not fail the workflow;
-    # failures are filed to rustfs/backlog.
-    continue-on-error: true
    timeout-minutes: 900
    # Run on manual dispatch, or when the nightly build completed successfully.
    # Skipped when nightly failed.
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-performance-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'RUSTFS_RESULT_DIR=%s/results\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'VERSION_FILE=%s/version.txt\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -123,7 +133,7 @@ jobs:
        if: ${{ inputs.cleanup_before != 'false' }}
        run: |
          chmod +x auto-testing/rustfs_performance_test.sh
-          ./auto-testing/rustfs_performance_test.sh --step 1 -y
+          ./auto-testing/rustfs_performance_test.sh --step 1 -y --log-file "${LOG_FILE:-/dev/null}"

      - name: Install RustFS package & start cluster (4x4)
        run: |
@@ -133,7 +143,7 @@ jobs:
          else
            ARGS+=(--package-url "${{ env.RUSTFS_NIGHTLY_PACKAGE_URL }}")
          fi
-          ./auto-testing/rustfs_performance_test.sh "${ARGS[@]}"
+          ./auto-testing/rustfs_performance_test.sh "${ARGS[@]}" --log-file "${LOG_FILE}"

      - name: Preflight checks
        run: |
@@ -143,7 +153,7 @@ jobs:
          else
            ARGS+=(--package-url "${{ env.RUSTFS_NIGHTLY_PACKAGE_URL }}")
          fi
-          ./auto-testing/rustfs_performance_test.sh "${ARGS[@]}"
+          ./auto-testing/rustfs_performance_test.sh "${ARGS[@]}" --log-file "${LOG_FILE}"

      - name: Run benchmark (GET/PUT/MIXED)
        id: benchmark
@@ -156,17 +166,15 @@ jobs:
            --step 5 -y \
            --warp-duration "${{ inputs.warp_duration || '5m' }}" \
            --warp-concurrency "${{ inputs.warp_concurrency || '64' }}" \
-            --log-file /tmp/rustfs-perf-test.log
+            --log-file "${LOG_FILE}"

      - name: Analyze results
        if: ${{ steps.benchmark.conclusion == 'success' }}
        run: |
-          ./auto-testing/rustfs_performance_test.sh --step 6 -y
+          ./auto-testing/rustfs_performance_test.sh --step 6 -y --log-file "${LOG_FILE:-/dev/null}"

      - name: Collect RustFS version info
        if: ${{ steps.benchmark.conclusion == 'success' }}
-        env:
-          VERSION_FILE: /tmp/rustfs-version.txt
        run: |
          set -euo pipefail
          read -r -a NODES <<< "${RUSTFS_NODES}"
@@ -186,7 +194,6 @@ jobs:
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
          RESULT_DIR: ${{ env.RUSTFS_RESULT_DIR }}
-          VERSION_FILE: /tmp/rustfs-version.txt
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -194,7 +201,7 @@ jobs:
            exit 0
          fi
          SUMMARY="${RESULT_DIR}/summary.md"
-          [ -f "${SUMMARY}" ] || { echo "summary.md not found at ${SUMMARY}"; exit 1; }
+          [ -s "${SUMMARY}" ] || { echo "summary.md not found at ${SUMMARY}"; exit 1; }
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="reports/${DATE}.md"
          {
@@ -202,6 +209,8 @@ jobs:
            echo ""
            echo "- **Date**: ${DATE}"
            echo "- **Run**: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- **Attempt**: ${GITHUB_RUN_ATTEMPT}"
+            echo "- **Workflow Commit**: ${GITHUB_SHA}"
            echo "- **Trigger**: ${{ github.event_name }}"
            echo "- **Package**: ${{ inputs.package_url || 'nightly (R2 latest)' }}"
            echo ""
@@ -211,8 +220,8 @@ jobs:
            echo '```text'
            cat "${VERSION_FILE}"
            echo '```'
-          } > /tmp/rustfs-perf-report.md
-          CONTENT="$(python3 -c 'import base64; print(base64.b64encode(open("/tmp/rustfs-perf-report.md","rb").read()).decode())')"
+          } > "${REPORT_FILE}"
+          CONTENT="$(python3 -c 'import base64,sys; print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
            jq -n --arg msg "report: ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
@@ -231,11 +240,10 @@ jobs:
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'performance'
          SUITE_LABEL: 'Performance'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-perf-report.md'
-          LOG_FILE: '/tmp/rustfs-perf-test.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -263,14 +271,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -286,20 +296,26 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload test logs & results
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-perf-test-${{ github.run_id }}
+          name: rustfs-perf-test-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-perf-test*.log
-            /tmp/rustfs-perf-results/**
-            /tmp/rustfs-version.txt
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/version.txt
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/master.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/summary.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/summary.tsv
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/get_*.txt
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/put_*.txt
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/results/mixed_*.txt
+          if-no-files-found: error

      - name: Reset test environment (after)
        if: ${{ always() && inputs.cleanup_after != 'false' }}
        run: |
-          ./auto-testing/rustfs_performance_test.sh --step 7 -y
+          ./auto-testing/rustfs_performance_test.sh --step 7 -y --log-file "${LOG_FILE:-/dev/null}"

      - name: Notify on failure
        if: failure()
@@ -76,9 +76,6 @@ jobs:
  pool-expansion-test:
    name: Pool expansion / decommission test
    runs-on: smoke-testing
-    # Requirement: a failing suite must not fail the workflow; failures
-    # are filed to rustfs/backlog and the chain continues.
-    continue-on-error: true
    timeout-minutes: 360
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    env:
@@ -542,17 +539,22 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.pool_test.outcome == 'failure' || steps.pool_test.outcome == 'cancelled') }}
@@ -34,8 +34,7 @@ on:
          - site
        default: all
  repository_dispatch:
-    # Chain handoff: dispatched when the security suite finishes. This is the
-    # last link of the functional chain.
+    # Chain handoff: dispatched when the security suite finishes.
    types: [rustfs-chain-replication]

 permissions:
@@ -62,12 +61,28 @@ env:
 jobs:
  replication-test:
    runs-on: smoke-testing
-    # A failed replication run must not break the chain or the workflow: the
-    # failure is reported to rustfs/backlog instead (see the issue step).
-    continue-on-error: true
    timeout-minutes: 360
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Checkout repository (for report parser)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-replication-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -116,9 +131,6 @@ jobs:

      - name: Run replication suite
        id: test
-        continue-on-error: true
-        env:
-          LOG_FILE: /tmp/rustfs-replication.log
        run: |
          set -euo pipefail
          chmod +x auto-testing/rustfs-replication-test.sh
@@ -141,10 +153,7 @@ jobs:
          ./auto-testing/rustfs-replication-test.sh "${ARGS[@]}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-replication.log
-          REPORT_FILE: /tmp/rustfs-replication-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          PACKAGE_URL='${{ inputs.package_url }}'
@@ -166,80 +175,44 @@ jobs:
              RUSTFS_VERSION_INFO="${DETECTED_VERSION}"
            fi
          fi
-          CASE_TABLE="/tmp/rustfs-replication-cases.md"
-          python3 - "${LOG_FILE}" "${CASE_TABLE}" <<'PY'
-          import re
-          import sys
-
-          log_file, out_file = sys.argv[1], sys.argv[2]
-          ansi = re.compile(r'\x1b\[[0-9;]*m')
-          start_re = re.compile(r'^---\s+([A-Z0-9]+-[0-9]+)\s+(.+?)\s+---$')
-          done_re = re.compile(r'^\[(PASS|FAIL|UNSUPPORTED)\]\s+([A-Z0-9]+-[0-9]+)\b')
-
-          rows = []
-          index = {}
-          try:
-              with open(log_file, 'r', encoding='utf-8', errors='replace') as fh:
-                  for raw in fh:
-                      line = ansi.sub('', raw).strip()
-                      m = start_re.match(line)
-                      if m:
-                          case_id, name = m.group(1), m.group(2)
-                          if case_id not in index:
-                              index[case_id] = len(rows)
-                              rows.append([case_id, name, 'RUNNING'])
-                          continue
-                      m = done_re.match(line)
-                      if m:
-                          status, case_id = m.group(1), m.group(2)
-                          if case_id in index:
-                              rows[index[case_id]][2] = status
-                          else:
-                              rows.append([case_id, case_id, status])
-                              index[case_id] = len(rows) - 1
-          except FileNotFoundError:
-              rows = []
-
-          counts = {'PASS': 0, 'FAIL': 0, 'UNSUPPORTED': 0, 'RUNNING': 0}
-          for _, _, status in rows:
-              counts[status] = counts.get(status, 0) + 1
-
-          with open(out_file, 'w', encoding='utf-8') as out:
-              out.write('## Case Summary\n\n')
-              out.write(f"- Total: {len(rows)}\\n")
-              out.write(f"- PASS: {counts.get('PASS', 0)}\\n")
-              out.write(f"- FAIL: {counts.get('FAIL', 0)}\\n")
-              out.write(f"- UNSUPPORTED: {counts.get('UNSUPPORTED', 0)}\\n")
-              out.write('\\n')
-              out.write('| Case | Name | Status |\\n')
-              out.write('| --- | --- | --- |\\n')
-              for case_id, name, status in rows:
-                  out.write(f'| {case_id} | {name} | {status} |\\n')
-          PY
+          CASE_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/cases.md"
+          CASE_RESULT=success
+          python3 scripts/functional_case_report.py "${LOG_FILE}" "${CASE_TABLE}" || CASE_RESULT=failure
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS replication test report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- Package: ${PACKAGE_SOURCE}"
            echo "- RustFS Version: ${RUSTFS_VERSION_INFO}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${CASE_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${CASE_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial case results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-replication-report.md
          SUITE: replication
        run: |
          set -euo pipefail
@@ -249,28 +222,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'replication'
          SUITE_LABEL: 'Replication (bucket + site)'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-replication-report.md'
-          LOG_FILE: '/tmp/rustfs-replication.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -298,14 +275,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -321,14 +300,15 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload report and logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-replication-${{ github.run_id }}
+          name: rustfs-replication-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-replication.log
-            /tmp/rustfs-replication-report.md
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/cases.md
+          if-no-files-found: error

      - name: Cleanup environment (after)
        if: always()
@@ -349,13 +329,50 @@ jobs:
            '
          done

-      - name: Chain complete
-        # Replication is the last link of the functional chain: nothing to
-        # dispatch after it. This step just records that the chain finished.
+      - name: "Continue functional chain (next: Performance)"
        if: ${{ always() && github.event_name == 'repository_dispatch' }}
+        env:
+          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
        run: |
-          echo "Functional chain complete: replication (final suite) finished."
-          echo "from_suite=security trigger=${{ github.event_name }} outcome=${{ steps.test.outcome }}"
+          set -uo pipefail
+          if [ -z "${GH_TOKEN:-}" ]; then
+            echo "PF_TESTING_GH_TOKEN is not configured; cannot dispatch the next suite" >&2
+            exit 1
+          fi
+          DISPATCHED=0
+          for attempt in 1 2 3; do
+            if gh api --method POST repos/rustfs/rustfs/dispatches \
+              -f event_type='rustfs-chain-performance' \
+              -F 'client_payload[from_suite]=replication'; then
+              echo "dispatched next suite Performance (attempt ${attempt})"
+              DISPATCHED=1
+              break
+            fi
+            echo "dispatch attempt ${attempt} failed; retrying in ${attempt}0s" >&2
+            sleep "${attempt}0"
+          done
+          if [ "${DISPATCHED:-0}" -ne 1 ]; then
+            echo "ERROR: functional chain stalled: could not dispatch Performance after 3 attempts" >&2
+            TITLE="[functional][chain] stalled after replication (run ${GITHUB_RUN_ID})"
+            BODY_FILE="$(mktemp)"
+            trap 'rm -f "${BODY_FILE}"' EXIT
+            {
+              echo "The functional chain could not hand off from **replication** to **Performance** after 3 attempts."
+              echo ""
+              echo "- Failed suite job: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}"
+              echo "- Expected next event: 'rustfs-chain-performance'"
+              echo "- Likely cause: PF_TESTING_GH_TOKEN lacks contents:write on rustfs/rustfs, or the GitHub API was unavailable."
+              echo "- Recovery: re-dispatch manually with"
+              FENCE="$(printf "\x60\x60\x60")"; echo "  ${FENCE}"
+              echo "  gh api --method POST repos/rustfs/rustfs/dispatches -f event_type='rustfs-chain-performance'"
+              FENCE="$(printf "\x60\x60\x60")"; echo "  ${FENCE}"
+            } > "${BODY_FILE}"
+            gh issue create -R rustfs/backlog --title "${TITLE}" \
+              --body-file "${BODY_FILE}" --label functional-test \
+              || gh issue create -R rustfs/backlog --title "${TITLE}" --body-file "${BODY_FILE}" \
+              || echo "could not file the stall alert issue either; check the token" >&2
+            exit 1
+          fi

      - name: Notify on failure
        if: failure()
@@ -37,10 +37,28 @@ env:
 jobs:
  s3-compat-test:
    runs-on: smoke-testing
-    continue-on-error: true
    timeout-minutes: 360
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Checkout repository (for report parser)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-s3-compat-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -88,9 +106,6 @@ jobs:

      - name: Run S3 compatibility suite
        id: test
-        continue-on-error: true
-        env:
-          LOG_FILE: /tmp/rustfs-s3-compat.log
        run: |
          set -euo pipefail
          chmod +x auto-testing/rustfs-s3-compat-test.sh
@@ -107,10 +122,7 @@ jobs:
          ./auto-testing/rustfs-s3-compat-test.sh "${ARGS[@]}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-s3-compat.log
-          REPORT_FILE: /tmp/rustfs-s3-compat-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          PACKAGE_URL='${{ inputs.package_url }}'
@@ -132,83 +144,44 @@ jobs:
              RUSTFS_VERSION_INFO="${DETECTED_VERSION}"
            fi
          fi
-          CASE_TABLE="/tmp/rustfs-s3-compat-cases.md"
-          python3 - "${LOG_FILE}" "${CASE_TABLE}" <<'PY'
-          import re
-          import sys
-
-          log_file, out_file = sys.argv[1], sys.argv[2]
-          ansi = re.compile(r'\x1b\[[0-9;]*m')
-          start_re = re.compile(r'^---\s+([A-Z0-9]+-[0-9]+)\s+(.+?)\s+---$')
-          done_re = re.compile(r'^\[(PASS|FAIL|UNSUPPORTED)\]\s+([A-Z0-9]+-[0-9]+)\b')
-
-          rows = []
-          index = {}
-          current = None
-          try:
-            with open(log_file, 'r', encoding='utf-8', errors='replace') as fh:
-              for raw in fh:
-                line = ansi.sub('', raw).strip()
-                m = start_re.match(line)
-                if m:
-                  case_id, name = m.group(1), m.group(2)
-                  current = case_id
-                  if case_id not in index:
-                    index[case_id] = len(rows)
-                    rows.append([case_id, name, 'RUNNING'])
-                  continue
-                m = done_re.match(line)
-                if m:
-                  status, case_id = m.group(1), m.group(2)
-                  if case_id in index:
-                    rows[index[case_id]][2] = status
-                  else:
-                    rows.append([case_id, case_id, status])
-                    index[case_id] = len(rows) - 1
-                  current = None
-          except FileNotFoundError:
-            rows = []
-
-          counts = {'PASS': 0, 'FAIL': 0, 'UNSUPPORTED': 0, 'RUNNING': 0}
-          for _, _, status in rows:
-            counts[status] = counts.get(status, 0) + 1
-
-          with open(out_file, 'w', encoding='utf-8') as out:
-            out.write('## Case Summary\n\n')
-            out.write(f"- Total: {len(rows)}\\n")
-            out.write(f"- PASS: {counts.get('PASS', 0)}\\n")
-            out.write(f"- FAIL: {counts.get('FAIL', 0)}\\n")
-            out.write(f"- UNSUPPORTED: {counts.get('UNSUPPORTED', 0)}\\n")
-            out.write('\\n')
-            out.write('| Case | Name | Status |\\n')
-            out.write('| --- | --- | --- |\\n')
-            for case_id, name, status in rows:
-              out.write(f'| {case_id} | {name} | {status} |\\n')
-          PY
+          CASE_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/cases.md"
+          CASE_RESULT=success
+          python3 scripts/functional_case_report.py "${LOG_FILE}" "${CASE_TABLE}" || CASE_RESULT=failure
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS S3 compatibility test report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- Package: ${PACKAGE_SOURCE}"
            echo "- RustFS Version: ${RUSTFS_VERSION_INFO}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${CASE_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${CASE_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial case results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-s3-compat-report.md
          SUITE: s3
        run: |
          set -euo pipefail
@@ -218,28 +191,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 's3'
          SUITE_LABEL: 'S3 compatibility'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-s3-compat-report.md'
-          LOG_FILE: '/tmp/rustfs-s3-compat.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -267,14 +244,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -290,14 +269,15 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload report and logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-s3-compat-${{ github.run_id }}
+          name: rustfs-s3-compat-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-s3-compat.log
-            /tmp/rustfs-s3-compat-report.md
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/cases.md
+          if-no-files-found: error

      - name: Cleanup environment (after)
        if: always()
@@ -77,10 +77,14 @@ jobs:
    timeout-minutes: 360
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      # Checkout the repository into its own subdirectory. Checking out at
+      # the workspace root would wipe the auto-testing clone above (that is
+      # exactly how run 33934141181 lost rustfs-security-test.sh).
      - name: Checkout repository (for the OIDC live gate script)
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false
+          path: rustfs-repo

      - name: Initialize security evidence
        id: evidence
@@ -88,7 +92,7 @@ jobs:
          set -euo pipefail
          umask 077
          SECURITY_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-security-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
-          mkdir -- "${SECURITY_ARTIFACTS_DIR}"
+          mkdir -- "${SECURITY_ARTIFACTS_DIR}" "${SECURITY_ARTIFACTS_DIR}-scratch"
          printf 'SECURITY_ARTIFACTS_DIR=%s\n' "${SECURITY_ARTIFACTS_DIR}" >> "${GITHUB_ENV}"

      # auto-testing is private: clone it with the dedicated PF token (not
@@ -144,8 +148,8 @@ jobs:
        continue-on-error: true
        env:
          REPORT_FILE: ${{ env.SECURITY_ARTIFACTS_DIR }}/suite-report.md
-          TMPDIR: ${{ env.SECURITY_ARTIFACTS_DIR }}
-          RUSTFS_SECURITY_OIDC_LIVE_SCRIPT: ${{ github.workspace }}/scripts/test/oidc_keycloak_live.sh
+          TMPDIR: ${{ env.SECURITY_ARTIFACTS_DIR }}-scratch
+          RUSTFS_SECURITY_OIDC_LIVE_SCRIPT: ${{ github.workspace }}/rustfs-repo/scripts/test/oidc_keycloak_live.sh
        run: |
          set -euo pipefail
          chmod +x auto-testing/rustfs-security-test.sh
@@ -168,7 +172,7 @@ jobs:
          else
            ARGS+=(--package-url "${RUSTFS_NIGHTLY_PACKAGE_URL}")
          fi
-          GITHUB_STEP_SUMMARY=/dev/null ./auto-testing/rustfs-security-test.sh "${ARGS[@]}"
+          GITHUB_STEP_SUMMARY=/dev/null ./auto-testing/rustfs-security-test.sh "${ARGS[@]}" 2>&1 | tee "${SECURITY_ARTIFACTS_DIR}/suite.log"

      - name: Generate report
        id: report
@@ -219,17 +223,22 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
@@ -296,7 +305,10 @@ jobs:
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
          name: rustfs-security-test-${{ github.run_id }}-${{ github.run_attempt }}
-          path: ${{ env.SECURITY_ARTIFACTS_DIR }}/
+          path: |
+            ${{ env.SECURITY_ARTIFACTS_DIR }}/report.md
+            ${{ env.SECURITY_ARTIFACTS_DIR }}/suite.log
+            ${{ env.SECURITY_ARTIFACTS_DIR }}/suite-report.md
          if-no-files-found: error
          retention-days: 3

@@ -46,10 +46,28 @@ env:
 jobs:
  storage-test:
    runs-on: smoke-testing
-    continue-on-error: true
    timeout-minutes: 360
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Checkout repository (for report parser)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-storage-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -97,9 +115,6 @@ jobs:

      - name: Run storage engine suite
        id: test
-        continue-on-error: true
-        env:
-          LOG_FILE: /tmp/rustfs-storage.log
        run: |
          set -euo pipefail
          chmod +x auto-testing/rustfs-storage-test.sh
@@ -122,10 +137,7 @@ jobs:
          ./auto-testing/rustfs-storage-test.sh "${ARGS[@]}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-storage.log
-          REPORT_FILE: /tmp/rustfs-storage-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          PACKAGE_URL='${{ inputs.package_url }}'
@@ -147,83 +159,44 @@ jobs:
              RUSTFS_VERSION_INFO="${DETECTED_VERSION}"
            fi
          fi
-          CASE_TABLE="/tmp/rustfs-storage-cases.md"
-          python3 - "${LOG_FILE}" "${CASE_TABLE}" <<'PY'
-          import re
-          import sys
-
-          log_file, out_file = sys.argv[1], sys.argv[2]
-          ansi = re.compile(r'\x1b\[[0-9;]*m')
-          start_re = re.compile(r'^---\s+([A-Z0-9]+-[0-9]+)\s+(.+?)\s+---$')
-          done_re = re.compile(r'^\[(PASS|FAIL|UNSUPPORTED)\]\s+([A-Z0-9]+-[0-9]+)\b')
-
-          rows = []
-          index = {}
-          current = None
-          try:
-            with open(log_file, 'r', encoding='utf-8', errors='replace') as fh:
-              for raw in fh:
-                line = ansi.sub('', raw).strip()
-                m = start_re.match(line)
-                if m:
-                  case_id, name = m.group(1), m.group(2)
-                  current = case_id
-                  if case_id not in index:
-                    index[case_id] = len(rows)
-                    rows.append([case_id, name, 'RUNNING'])
-                  continue
-                m = done_re.match(line)
-                if m:
-                  status, case_id = m.group(1), m.group(2)
-                  if case_id in index:
-                    rows[index[case_id]][2] = status
-                  else:
-                    rows.append([case_id, case_id, status])
-                    index[case_id] = len(rows) - 1
-                  current = None
-          except FileNotFoundError:
-            rows = []
-
-          counts = {'PASS': 0, 'FAIL': 0, 'UNSUPPORTED': 0, 'RUNNING': 0}
-          for _, _, status in rows:
-            counts[status] = counts.get(status, 0) + 1
-
-          with open(out_file, 'w', encoding='utf-8') as out:
-            out.write('## Case Summary\n\n')
-            out.write(f"- Total: {len(rows)}\\n")
-            out.write(f"- PASS: {counts.get('PASS', 0)}\\n")
-            out.write(f"- FAIL: {counts.get('FAIL', 0)}\\n")
-            out.write(f"- UNSUPPORTED: {counts.get('UNSUPPORTED', 0)}\\n")
-            out.write('\\n')
-            out.write('| Case | Name | Status |\\n')
-            out.write('| --- | --- | --- |\\n')
-            for case_id, name, status in rows:
-              out.write(f'| {case_id} | {name} | {status} |\\n')
-          PY
+          CASE_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/cases.md"
+          CASE_RESULT=success
+          python3 scripts/functional_case_report.py "${LOG_FILE}" "${CASE_TABLE}" || CASE_RESULT=failure
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS storage engine test report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- Package: ${PACKAGE_SOURCE}"
            echo "- RustFS Version: ${RUSTFS_VERSION_INFO}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${CASE_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${CASE_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial case results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-storage-report.md
          SUITE: storage
        run: |
          set -euo pipefail
@@ -233,28 +206,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'storage'
          SUITE_LABEL: 'Storage engine'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-storage-report.md'
-          LOG_FILE: '/tmp/rustfs-storage.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -282,14 +259,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -305,14 +284,15 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload report and logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-storage-${{ github.run_id }}
+          name: rustfs-storage-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-storage.log
-            /tmp/rustfs-storage-report.md
-          if-no-files-found: warn
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/cases.md
+          if-no-files-found: error

      - name: Cleanup environment (after)
        if: always()
@@ -61,9 +61,6 @@ env:
 jobs:
  tier-test:
    runs-on: smoke-testing
-    # Requirement: a failing suite must not fail the workflow; failures
-    # are filed to rustfs/backlog and the chain continues.
-    continue-on-error: true
    timeout-minutes: 420
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
@@ -380,17 +377,22 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: Verify required tier evidence
        id: evidence_verify
@@ -79,10 +79,28 @@ env:
 jobs:
  upgrade-test:
    runs-on: smoke-testing
-    continue-on-error: true
    timeout-minutes: 420
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'repository_dispatch' }}
    steps:
+      - name: Checkout repository (for report parser)
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Initialize functional evidence
+        id: evidence
+        run: |
+          set -euo pipefail
+          umask 077
+          FUNCTIONAL_ARTIFACTS_DIR="${RUNNER_TEMP}/rustfs-upgrade-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          mkdir -- "${FUNCTIONAL_ARTIFACTS_DIR}" "${FUNCTIONAL_ARTIFACTS_DIR}-scratch"
+          {
+            printf 'FUNCTIONAL_ARTIFACTS_DIR=%s\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'LOG_FILE=%s/suite.log\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'REPORT_FILE=%s/report.md\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+            printf 'TMPDIR=%s-scratch\n' "${FUNCTIONAL_ARTIFACTS_DIR}"
+          } >> "${GITHUB_ENV}"
+
      # auto-testing is private: clone it with the dedicated PF token (not
      # GITHUB_TOKEN) and retry transient GitHub/network failures.
      - name: Checkout auto-testing scripts (with retry)
@@ -142,9 +160,7 @@ jobs:

      - name: Run upgrade compatibility suite
        id: test
-        continue-on-error: true
        env:
-          LOG_FILE: /tmp/rustfs-upgrade.log
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
        run: |
          set -euo pipefail
@@ -202,10 +218,7 @@ jobs:
          ./auto-testing/rustfs-upgrade-test.sh "${ARGS[@]}"

      - name: Generate report
-        if: always()
-        env:
-          LOG_FILE: /tmp/rustfs-upgrade.log
-          REPORT_FILE: /tmp/rustfs-upgrade-report.md
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        run: |
          set -euo pipefail
          FROM_URL='${{ inputs.from_url }}'
@@ -226,103 +239,47 @@ jobs:
          else
            TO_SOURCE="${RUSTFS_NIGHTLY_PACKAGE_URL}"
          fi
-          CASE_TABLE="/tmp/rustfs-upgrade-cases.md"
-          MATRIX_TABLE="/tmp/rustfs-upgrade-matrix.md"
-          python3 - "${LOG_FILE}" "${CASE_TABLE}" "${MATRIX_TABLE}" <<'PY'
-          import re
-          import sys
-
-          log_file, out_file, matrix_file = sys.argv[1], sys.argv[2], sys.argv[3]
-          ansi = re.compile(r'\x1b\[[0-9;]*m')
-          start_re = re.compile(r'^---\s+([A-Z]+-[0-9]+)\s+(.+?)\s+---$')
-          done_re = re.compile(r'^\[(PASS|FAIL|UNSUPPORTED)\]\s+([A-Z]+-[0-9]+)\b')
-          topo_re = re.compile(
-              r'^\[UPG-TOPO\]\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+PASS=(\d+)\s+FAIL=(\d+)\s*$')
-
-          rows = []
-          index = {}
-          topo_rows = []
-          try:
-              with open(log_file, 'r', encoding='utf-8', errors='replace') as fh:
-                  for raw in fh:
-                      line = ansi.sub('', raw).strip()
-                      m = topo_re.match(line)
-                      if m:
-                          topo_rows.append(m.groups())
-                          continue
-                      m = start_re.match(line)
-                      if m:
-                          case_id, name = m.group(1), m.group(2)
-                          if case_id not in index:
-                              index[case_id] = len(rows)
-                              rows.append([case_id, name, 'RUNNING'])
-                          continue
-                      m = done_re.match(line)
-                      if m:
-                          status, case_id = m.group(1), m.group(2)
-                          if case_id in index:
-                              rows[index[case_id]][2] = status
-                          else:
-                              rows.append([case_id, case_id, status])
-                              index[case_id] = len(rows) - 1
-          except FileNotFoundError:
-              rows = []
-
-          counts = {'PASS': 0, 'FAIL': 0, 'UNSUPPORTED': 0, 'RUNNING': 0}
-          for _, _, status in rows:
-              counts[status] = counts.get(status, 0) + 1
-
-          with open(out_file, 'w', encoding='utf-8') as out:
-              out.write('## Case Summary\n\n')
-              out.write(f"- Total: {len(rows)}\\n")
-              out.write(f"- PASS: {counts.get('PASS', 0)}\\n")
-              out.write(f"- FAIL: {counts.get('FAIL', 0)}\\n")
-              out.write(f"- UNSUPPORTED: {counts.get('UNSUPPORTED', 0)}\\n")
-              out.write('\\n')
-              out.write('| Case | Name | Status |\\n')
-              out.write('| --- | --- | --- |\\n')
-              for case_id, name, status in rows:
-                  out.write(f'| {case_id} | {name} | {status} |\\n')
-
-          # Upgrade matrix: one row per topology/backend with the versions
-          # captured on the nodes (rustfs --version) and the aggregated
-          # result. The dashboard renders this table directly.
-          with open(matrix_file, 'w', encoding='utf-8') as out:
-              out.write('## Upgrade Matrix\n\n')
-              out.write('| Topology | KMS Backend | From Version | To Version | Result |\n')
-              out.write('| --- | --- | --- | --- | --- |\n')
-              for topo, backend, old_v, new_v, npass, nfail in topo_rows:
-                  result = 'PASS' if nfail == '0' else 'FAIL'
-                  out.write(f'| {topo} | {backend} | {old_v} | {new_v} | {result} (PASS={npass} FAIL={nfail}) |\n')
-              if not topo_rows:
-                  out.write('| - | - | - | - | NOT RUN (suite failed before upgrade) |\n')
-          PY
+          CASE_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/cases.md"
+          MATRIX_TABLE="${FUNCTIONAL_ARTIFACTS_DIR}/matrix.md"
+          CASE_RESULT=success
+          python3 scripts/functional_case_report.py "${LOG_FILE}" "${CASE_TABLE}" "${MATRIX_TABLE}" || CASE_RESULT=failure
+          RESULT=failure
+          if [ '${{ steps.test.outcome }}' = 'success' ] && [ "${CASE_RESULT}" = 'success' ]; then
+            RESULT=success
+          fi
          {
            echo "# RustFS upgrade compatibility report"
            echo ""
            echo "- Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${{ github.event_name }}"
            echo "- From: ${FROM_SOURCE}"
            echo "- To: ${TO_SOURCE}"
-            echo "- Test Step Outcome: ${{ steps.test.outcome }}"
+            echo "- Test Step Outcome: ${RESULT}"
+            echo "- Suite Step Outcome: ${{ steps.test.outcome }}"
            echo ""
-            cat "${MATRIX_TABLE}" || true
+            if [ "${RESULT}" = "success" ]; then
+              cat "${MATRIX_TABLE}"
              echo ""
-            cat "${CASE_TABLE}" || true
+              cat "${CASE_TABLE}"
              echo ""
              echo "## Log tail"
              echo '```text'
-            tail -n 200 "${LOG_FILE}" || true
+              tail -n 200 "${LOG_FILE}"
              echo '```'
+            else
+              echo "The suite or evidence validation failed. See this run's artifact for partial case results and suite.log."
+            fi
          } | tee "${REPORT_FILE}"
          cat "${REPORT_FILE}" >> "${GITHUB_STEP_SUMMARY}"
+          [ "${RESULT}" = "success" ]

      - name: Upload functional report to dashboard
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PF_TESTING_GH_TOKEN }}
-          REPORT_FILE: /tmp/rustfs-upgrade-report.md
          SUITE: upgrade
        run: |
          set -euo pipefail
@@ -332,28 +289,32 @@ jobs:
          fi
          DATE="$(date -u +%Y-%m-%d)"
          REPORT_PATH="functional-reports/${SUITE}/${DATE}.md"
-          CONTENT="$(python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}")"
+          # Base64-encode the report into a temp file and feed it to jq via
+          # --rawfile: large reports (e.g. pool) exceed the OS argv limit and
+          # make `jq --arg content "${CONTENT}"` fail with "Argument list too long".
+          B64_FILE="$(mktemp)"
+          python3 -c 'import base64,sys;print(base64.b64encode(open(sys.argv[1],"rb").read()).decode())' "${REPORT_FILE}" > "${B64_FILE}"
          SHA="$(gh api "repos/rustfs/dashboard/contents/${REPORT_PATH}" -q '.sha' 2>/dev/null || true)"
          if [ -n "${SHA}" ]; then
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" --arg sha "${SHA}" \
-              '{message:$msg, content:$content, sha:$sha}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" --arg sha "${SHA}" \
+              '{message:$msg, content:($content|rtrimstr("\n")), sha:$sha}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          else
-            jq -n --arg msg "report(${SUITE}): ${DATE}" --arg content "${CONTENT}" \
-              '{message:$msg, content:$content}' \
+            jq -n --arg msg "report(${SUITE}): ${DATE}" --rawfile content "${B64_FILE}" \
+              '{message:$msg, content:($content|rtrimstr("\n"))}' \
              | gh api --method PUT "repos/rustfs/dashboard/contents/${REPORT_PATH}" --input - >/dev/null
          fi
+          rm -f "${B64_FILE}"

      - name: File failure issue in rustfs/backlog
        if: ${{ always() && (failure() || steps.test.outcome == 'failure' || steps.test.outcome == 'cancelled') }}
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.PF_TESTING_GH_TOKEN }}
+          EVIDENCE_OUTCOME: ${{ steps.evidence.outcome }}
          SUITE: 'upgrade'
          SUITE_LABEL: 'Upgrade compatibility'
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-          REPORT_FILE: '/tmp/rustfs-upgrade-report.md'
-          LOG_FILE: '/tmp/rustfs-upgrade.log'
        run: |
          set -euo pipefail
          if [ -z "${GH_TOKEN:-}" ]; then
@@ -381,14 +342,16 @@ jobs:
            echo ""
            echo "- Suite: \`${SUITE}\`"
            echo "- Run: ${RUN_URL}"
+            echo "- Attempt: ${GITHUB_RUN_ATTEMPT}"
+            echo "- Workflow Commit: ${GITHUB_SHA}"
            echo "- Trigger: ${GITHUB_EVENT_NAME}"
            echo "- Date: $(date -u +%Y-%m-%d)"
            echo ""
            echo "## Report (errors and symptoms)"
            echo ""
-            if [ -s "${REPORT_FILE}" ]; then
+            if [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${REPORT_FILE}" ]; then
              redact < "${REPORT_FILE}"
-            elif [ -s "${LOG_FILE:-}" ]; then
+            elif [ "${EVIDENCE_OUTCOME}" = "success" ] && [ -s "${LOG_FILE:-}" ]; then
              echo "(report file missing; log tail below)"
              echo ""
              tail -n 200 "${LOG_FILE}" | redact
@@ -404,14 +367,16 @@ jobs:
          echo "filed backlog issue for suite ${SUITE}"

      - name: Upload report and logs
-        if: always()
+        if: ${{ always() && steps.evidence.outcome == 'success' }}
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
        with:
-          name: rustfs-upgrade-test-${{ github.run_id }}
+          name: rustfs-upgrade-test-${{ github.run_id }}-${{ github.run_attempt }}
          path: |
-            /tmp/rustfs-upgrade-report.md
-            /tmp/rustfs-upgrade.*/*
-          if-no-files-found: ignore
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/report.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/suite.log
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/cases.md
+            ${{ env.FUNCTIONAL_ARTIFACTS_DIR }}/matrix.md
+          if-no-files-found: error
          retention-days: 3

      - name: Cleanup environment (after)
@@ -22,6 +22,7 @@ on:
      - "Continuous Integration"
      - "coverage"
      - "e2e-nightly"
+      - "e2e-distributed"
      - "e2e-s3tests"
      - "Fuzz"
      - "mint"
@@ -3,9 +3,9 @@
 repos:
  - repo: local
    hooks:
-      - id: rustfs-dev-check
-        name: rustfs dev-check
-        entry: make dev-check
+      - id: rustfs-fmt-check
+        name: Rust formatting
+        entry: cargo fmt --all --check
        language: system
        types: [rust]
        pass_filenames: false
@@ -18,7 +18,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  - Read paths: an object at or below `policy.inline_max_bytes` (16 MiB by default) is teed to the client and to the local store in a single source read; a larger object or a Range read streams through and a background pull stores the whole object. A HEAD miss is proxied to the source and stores nothing (`policy.head = local_only` disables it). Every source-backed response carries `x-rustfs-on-demand-migration: source`
  - Protections: a per-source circuit breaker, a per-key negative cache, singleflight per key, a concurrency limit and a bounded pull queue shared by the inline and background paths, an optional bandwidth limit, an anti-loop request marker, and the shared outbound-endpoint (SSRF) policy
  - Metrics under `rustfs_on_demand_migration_*` (`requests_total`, `pulled_bytes_total`, `pulled_objects_total`, `pull_failures_total`, `inflight_pulls`, `queue_depth`, `source_latency_seconds_*`, `breaker_state`), mirrored per node by the admin status route
-  - Limitations: listings show only local objects (the source is not merged into `ListObjectsV2`); PUT and DELETE never reach the source; a source object updated after it was pulled is not re-fetched; SSE-C source objects are unsupported and answer 424; `Last-Modified` on a pulled object is the local write time, with the source timestamp kept in metadata
+  - Listings: `ListObjects` v1 remains local with ordinary key markers. `ListObjectsV2` can merge source objects when `policy.list_through = true`; this is off by default
+  - Upgrade and rollback: finish upgrading every node before enabling ODM. An rc.5 node that writes bucket configuration drops the ODM fields from metadata; neither a later restart nor moving the service out of ECStore recovers them. Before rollback, disable ODM and securely retain the original full configuration and credentials. After every node returns to a compatible version, restore and validate that configuration. Redacted exports cannot replace the credential backup; source-only objects are unavailable through RustFS while ODM is disabled. See the upgrade and rollback section of `docs/operations/on-demand-migration.md`
+  - Optional Google dependencies: default and `full` server builds retain native GCS support. `cargo build -p rustfs --no-default-features --features ftps,webdav` excludes Google SDKs while preserving configuration decoding and redaction; native GCS ODM and tier operations require the `gcs` feature. Do not use that build with existing GCS-tiered data
+  - Limitations: PUT and DELETE never reach the source; a source object updated after it was pulled is not re-fetched; SSE-C source objects are unsupported and answer 424; `Last-Modified` on a pulled object is the local write time, with the source timestamp kept in metadata
 - **NATS JetStream Publish Path**: Opt-in at-least-once delivery for the NATS notify and audit targets. A NATS Core publish flushes to the connection without awaiting a broker acknowledgement, so an event can be lost across a broker restart or a reconnect after the send queue has already cleared it. A queued event now clears only after the JetStream `PublishAck`, so bucket notifications survive those interruptions. Off by default and byte-identical to the NATS Core path when disabled.
  - Three configuration keys per target: `JETSTREAM_ENABLE`, `JETSTREAM_STREAM_NAME`, and `JETSTREAM_ACK_TIMEOUT_SECS`, under the `RUSTFS_NOTIFY_NATS_` and `RUSTFS_AUDIT_NATS_` prefixes
  - Durable store-and-forward with a stable dedup id sent as the `Nats-Msg-Id` header, so a replay after a crash is collapsed by the server duplicate window
@@ -109,24 +109,17 @@ affected boundaries and risks. CI still runs its configured repository gates.

 ### 🔒 Git Pre-commit Hooks (optional)

-Git hooks are **not** versioned in this repository, so a fresh clone has no
-active pre-commit hook. If you add your own `.git/hooks/pre-commit` (a good
-choice is a one-liner that runs `make pre-commit`), you can mark it executable
-with:
+The optional hook uses the checked-in `.pre-commit-config.yaml`. Install [pre-commit](https://pre-commit.com/#installation), then run this from the checkout or a linked worktree:

 ```bash
 make setup-hooks
 ```

-Or manually:
+The hook runs `cargo fmt --all --check` when staged files include Rust source. It does not compile the workspace or run tests. Fix formatting with `cargo fmt --all`, inspect and stage the result, then commit again.

-```bash
-chmod +x .git/hooks/pre-commit
-```
+`pre-commit install` resolves Git's hook directory for linked worktrees and preserves an existing hook in migration mode. If you use `core.hooksPath`, keep that hook manager and integrate `pre-commit run` there; the installer refuses to silently replace that configuration.

-With or without a hook, follow the verification tiers in `AGENTS.md`. Run the
-applicable scoped checks, and reserve `make pre-pr` for broad cross-module
-changes whose impact cannot be bounded by those checks.
+A local hook provides early formatting feedback. With or without it, follow the verification tiers in `AGENTS.md`, run relevant behavioral tests, and satisfy the CI merge gates. `make pre-commit` and `make dev-check` remain explicit broader commands.

 ### 📝 Formatting Configuration

@@ -138,31 +131,11 @@ fn_call_width = 90
 single_line_let_else_max_width = 100
 ```

-### 🚫 Commit Prevention
-
-If you set up a pre-commit hook and your code doesn't meet the formatting requirements, the hook will:
-
-1. **Block the commit** and show clear error messages
-2. **Provide exact commands** to fix the issues
-3. **Guide you through** the resolution process
-
-Example output when formatting fails:
-
-```
-❌ Code formatting check failed!
-💡 Please run 'cargo fmt --all' to format your code before committing.
-
-🔧 Quick fix:
-   cargo fmt --all
-   git add .
-   git commit
-```
-
 ### 🔄 Development Workflow

 1. **Make your changes**
 2. **Format your code**: `make fmt` or `cargo fmt --all`
-3. **Run the fast gate**: `make pre-commit` (no clippy, no tests)
+3. **Select relevant checks** using the validation tier in `AGENTS.md`; use `make pre-commit` when its broader fast gate adds useful coverage
 4. **Commit your changes**: `git commit -m "your message"`
 5. **Complete the applicable multi-role adversarial review** for non-exempt changes (see `AGENTS.md`)
 6. **Run applicable scoped checks before opening/updating a PR**; consider
@@ -206,11 +179,12 @@ Configure your IDE to:
 #### Pre-commit hook not running?

 ```bash
-# Check if hook is executable
-ls -la .git/hooks/pre-commit
-
-# Make it executable if needed
-chmod +x .git/hooks/pre-commit
+pre-commit validate-config
+pre-commit run --all-files
+# Inspect any configured hook manager; do not overwrite it.
+git config --get core.hooksPath
+# Install if no separate hook manager is configured.
+make setup-hooks
 ```

 #### Formatting issues?
@@ -315,7 +315,7 @@ dependencies = [
 "strum",
 "thiserror 2.0.20",
 "uuid",
- "zstd",
+ "zstd 0.13.3",
 ]

 [[package]]
@@ -508,7 +508,7 @@ dependencies = [
 "arrow-select",
 "flatbuffers",
 "lz4_flex",
- "zstd",
+ "zstd 0.13.3",
 ]

 [[package]]
@@ -1679,7 +1679,7 @@ version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
 dependencies = [
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 ]

 [[package]]
@@ -1698,7 +1698,7 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8894febbff9f758034a5b8e12d87918f56dfc64a8e1fe757d65e29041538d93"
 dependencies = [
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 ]

 [[package]]
@@ -2110,7 +2110,7 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
 dependencies = [
- "crypto-common 0.1.7",
+ "crypto-common 0.1.6",
 "inout 0.1.4",
 ]

@@ -2249,8 +2249,8 @@ dependencies = [
 "liblzma",
 "lz4",
 "memchr",
- "zstd",
- "zstd-safe",
+ "zstd 0.13.3",
+ "zstd-safe 7.3.0",
 ]

 [[package]]
@@ -2527,18 +2527,18 @@ checksum = "790eea4361631c5e7d22598ecd5723ff611904e3344ce8720784c93e3d83d40b"

 [[package]]
 name = "crossbeam-channel"
-version = "0.5.16"
+version = "0.5.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d85363c37faeca707aef026efa9f3b34d077bce547e48f770770625c6013679e"
+checksum = "98b0cc327b5bc766e7fda9c9260cc0fa81b43a8e240440422dff70788e3f9ef1"
 dependencies = [
 "crossbeam-utils",
 ]

 [[package]]
 name = "crossbeam-deque"
-version = "0.8.7"
+version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5181e0de7b61eb03a81e347d6dd8797bae9da5146707b51077e2d71a54ec0ceb"
+checksum = "622f3fc73690be383c7214310406f28a90e6edeadc3cea882f9d71e495b9711a"
 dependencies = [
 "crossbeam-epoch",
 "crossbeam-utils",
@@ -2546,27 +2546,27 @@ dependencies = [

 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.20"
+version = "0.9.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d6914041f254d6e9176c01941b21115dcfb7089e55135a35411081bd106ef3f"
+checksum = "dc74980687109a3b14c72fd458107bf0baa1da1a1a805e178d15501ba9b86d9d"
 dependencies = [
 "crossbeam-utils",
 ]

 [[package]]
 name = "crossbeam-queue"
-version = "0.3.13"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "803d13fb3b09d88be9f4dbc29062c66b19bf7170867ceb746d2a8689bf6c7a26"
+checksum = "03e8bd762f7479489c70ed6c768ddca99d7296857de437a68dcb2a94365b3fae"
 dependencies = [
 "crossbeam-utils",
 ]

 [[package]]
 name = "crossbeam-utils"
-version = "0.8.22"
+version = "0.8.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61803da095bee82a81bb1a452ecc25d3b2f1416d1897eb86430c6159ef717c17"
+checksum = "a31eee39dddec8330830986fcd7625edb5a24ec90ea038215273bbc3adb08ac6"

 [[package]]
 name = "crunchy"
@@ -2580,7 +2580,7 @@ version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0dc92fb57ca44df6db8059111ab3af99a63d5d0f8375d9972e319a379c6bab76"
 dependencies = [
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 "rand_core 0.6.4",
 "subtle",
 "zeroize",
@@ -2605,11 +2605,11 @@ dependencies = [

 [[package]]
 name = "crypto-common"
-version = "0.1.7"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
 dependencies = [
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 "typenum",
 ]

@@ -3673,9 +3673,9 @@ dependencies = [

 [[package]]
 name = "der"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a69dedd701da44b0536442edf09c81a64b0ab97a7a4a5e3d1971f00027cbc63d"
+checksum = "a878c850e9e421b20262e9b41f9c860e4785fa07541c266b62ff9d1ef998a80a"
 dependencies = [
 "const-oid 0.10.2",
 "pem-rfc7468 1.0.0",
@@ -3901,7 +3901,7 @@ checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
 "block-buffer 0.10.4",
 "const-oid 0.9.6",
- "crypto-common 0.1.7",
+ "crypto-common 0.1.6",
 "subtle",
 ]

@@ -4067,7 +4067,7 @@ dependencies = [
 "uuid",
 "walkdir",
 "zip",
- "zstd",
+ "zstd 0.14.0",
 ]

 [[package]]
@@ -4090,7 +4090,7 @@ version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0681a4fc24c767085329728d8dfba959af91228aa4610cca4f8ce317ba46ae0"
 dependencies = [
- "der 0.8.1",
+ "der 0.8.2",
 "digest 0.11.3",
 "elliptic-curve 0.14.1",
 "rfc6979 0.6.0",
@@ -4166,7 +4166,7 @@ dependencies = [
 "crypto-bigint 0.5.5",
 "digest 0.10.7",
 "ff 0.13.1",
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 "group 0.13.0",
 "hkdf 0.12.4",
 "pem-rfc7468 0.7.0",
@@ -4499,7 +4499,7 @@ checksum = "94e7099f6313ecacbe1256e8ff9d617b75d1bcb16a6fddef94866d225a01a14a"
 dependencies = [
 "io-lifetimes 2.0.4",
 "rustix",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]

 [[package]]
@@ -4622,9 +4622,9 @@ dependencies = [

 [[package]]
 name = "generic-array"
-version = "0.14.7"
+version = "0.14.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+checksum = "4bb6743198531e02858aeaea5398fcc883e71851fcbcb5a2f773e2fb6cb1edf2"
 dependencies = [
 "typenum",
 "version_check",
@@ -4637,7 +4637,7 @@ version = "1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "337d46834ee672ab3e48caca2cb0c78cc174fb12b3a68d0d88f99a0519a5e36e"
 dependencies = [
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 "rustversion",
 "typenum",
 ]
@@ -5319,9 +5319,9 @@ dependencies = [

 [[package]]
 name = "hotpath-macros"
-version = "0.25.0"
+version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "929b2285d2cd21b2733a7fb6ebc843bb4f83dbd1db0122f5f9ebb9567b1e2613"
+checksum = "846bde0d9600d98434e1aac376977d7718bfe3d2f5312a041b7c59a6a466c51a"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -5660,7 +5660,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
 dependencies = [
 "block-padding 0.3.3",
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 ]

 [[package]]
@@ -5693,7 +5693,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "20fd6de4ccfcc187e38bc21cfa543cb5a302cb86a8b114eb7f0bf0dc9f8ac00f"
 dependencies = [
 "io-lifetimes 3.0.1",
- "windows-sys 0.52.0",
+ "windows-sys 0.60.2",
 ]

 [[package]]
@@ -5734,9 +5734,9 @@ dependencies = [

 [[package]]
 name = "ipnet"
-version = "2.12.1"
+version = "2.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a756c3fac73139e83f14c2d742155dd2b78d3ee56597b419a0579b7bdd6dd78"
+checksum = "791930b43c0d5973160d90a8f3894509f2b273430f5c5c73b668636d0287c5c0"
 dependencies = [
 "serde",
 ]
@@ -5971,7 +5971,7 @@ dependencies = [
 "lz4",
 "snap",
 "uuid",
- "zstd",
+ "zstd 0.13.3",
 ]

 [[package]]
@@ -6139,9 +6139,9 @@ checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"

 [[package]]
 name = "libflate"
-version = "2.3.1"
+version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4da9b700e758e57152a1fd1c52cbdc5727c1aa6d8743dc1acda917398f1d76c"
+checksum = "561a8da1a50e1428d3c51321dafeca849df992a5bb67720c386131234caba82e"
 dependencies = [
 "adler32",
 "crc32fast",
@@ -7115,7 +7115,7 @@ version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51e219e79014df21a225b1860a479e2dcd7cbd9130f4defd4bd0e191ea31d67d"
 dependencies = [
- "base64 0.21.7",
+ "base64 0.22.1",
 "chrono",
 "getrandom 0.2.17",
 "http 1.5.0",
@@ -7658,7 +7658,7 @@ dependencies = [
 "snap",
 "tokio",
 "twox-hash",
- "zstd",
+ "zstd 0.13.3",
 ]

 [[package]]
@@ -7933,7 +7933,7 @@ version = "0.8.0-rc.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "986d2e952779af96ea048f160fd9194e1751b4faea78bcf3ceb456efe008088e"
 dependencies = [
- "der 0.8.1",
+ "der 0.8.2",
 "spki 0.8.0",
 ]

@@ -7976,7 +7976,7 @@ dependencies = [
 "aes 0.9.3",
 "aes-gcm",
 "cbc 0.2.1",
- "der 0.8.1",
+ "der 0.8.2",
 "pbkdf2 0.13.0",
 "rand_core 0.10.1",
 "scrypt 0.12.0",
@@ -8000,7 +8000,7 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "451913da69c775a56034ea8d9003d27ee8948e12443eae7c038ba100a4f21cb7"
 dependencies = [
- "der 0.8.1",
+ "der 0.8.2",
 "pkcs5 0.8.1",
 "rand_core 0.10.1",
 "spki 0.8.0",
@@ -8942,9 +8942,9 @@ dependencies = [

 [[package]]
 name = "redis"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e37a4ca5c6ca42aa3e6df2fd32b987a65d32a4c2159a6f3fe0fd1df306a2658f"
+checksum = "2acbc41a996f7652b2ddd9dfd98cc4ff602cfd742ae35382f07f608405ab50ed"
 dependencies = [
 "arc-swap",
 "arcstr",
@@ -9326,7 +9326,7 @@ dependencies = [
 "curve25519-dalek 5.0.0",
 "data-encoding",
 "delegate",
- "der 0.8.1",
+ "der 0.8.2",
 "digest 0.11.3",
 "ecdsa 0.17.0",
 "ed25519-dalek 3.0.0",
@@ -9493,6 +9493,8 @@ dependencies = [
 "atomic_enum",
 "aws-config",
 "aws-sdk-s3",
+ "aws-smithy-runtime-api",
+ "aws-smithy-types",
 "axum",
 "base64-simd",
 "bytes",
@@ -9501,11 +9503,13 @@ dependencies = [
 "clap",
 "const-str",
 "datafusion",
+ "faster-hex",
 "flatbuffers",
 "flate2",
 "futures",
 "futures-lite",
 "futures-util",
+ "google-cloud-auth",
 "hashbrown 0.17.1",
 "hex-simd",
 "hmac 0.13.0",
@@ -9524,6 +9528,7 @@ dependencies = [
 "metrics",
 "metrics-util",
 "mime_guess",
+ "moka",
 "opentelemetry",
 "opentelemetry_sdk",
 "p256 0.14.0",
@@ -9616,9 +9621,10 @@ dependencies = [
 "urlencoding",
 "uuid",
 "x509-parser",
+ "xxhash-rust",
 "zeroize",
 "zip",
- "zstd",
+ "zstd 0.14.0",
 ]

 [[package]]
@@ -9993,6 +9999,7 @@ dependencies = [
 "rustls-pki-types",
 "serde",
 "serde_json",
+ "serde_with",
 "serial_test",
 "sha1 0.11.0",
 "sha2 0.11.0",
@@ -10228,7 +10235,7 @@ dependencies = [
 "thiserror 2.0.20",
 "walkdir",
 "zip",
- "zstd",
+ "zstd 0.14.0",
 ]

 [[package]]
@@ -10395,7 +10402,7 @@ dependencies = [
 "tracing-opentelemetry",
 "tracing-subscriber",
 "url",
- "zstd",
+ "zstd 0.14.0",
 ]

 [[package]]
@@ -10739,6 +10746,7 @@ dependencies = [
 "rustfs-data-usage",
 "rustfs-ecstore",
 "rustfs-filemeta",
+ "rustfs-heal",
 "rustfs-heal-contracts",
 "rustfs-lifecycle",
 "rustfs-lock",
@@ -10936,9 +10944,9 @@ dependencies = [

 [[package]]
 name = "rustfs-uring"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0486e62d0efe25db95c00aeacb2da84368adcba299216cda99fcb11328061c84"
+checksum = "b29bc57b4bd62a73f4fae408b536adf578332e50e464797d09dc2382c7cb68c2"
 dependencies = [
 "io-uring",
 "libc",
@@ -10985,7 +10993,7 @@ dependencies = [
 "transform-stream",
 "url",
 "windows",
- "zstd",
+ "zstd 0.14.0",
 ]

 [[package]]
@@ -11399,7 +11407,7 @@ checksum = "d3e97a565f76233a6003f9f5c54be1d9c5bdfa3eccfb189469f11ec4901c47dc"
 dependencies = [
 "base16ct 0.2.0",
 "der 0.7.10",
- "generic-array 0.14.7",
+ "generic-array 0.14.9",
 "pkcs8 0.10.2",
 "subtle",
 "zeroize",
@@ -11413,7 +11421,7 @@ checksum = "d56d437c2f19203ce5f7122e507831de96f3d2d4d3be5af44a0b0a09d8a80e4d"
 dependencies = [
 "base16ct 1.0.0",
 "ctutils",
- "der 0.8.1",
+ "der 0.8.2",
 "hybrid-array",
 "subtle",
 "zeroize",
@@ -11987,7 +11995,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d9efca8738c78ee9484207732f728b1ef517bbb1833d6fc0879ca898a522f6f"
 dependencies = [
 "base64ct",
- "der 0.8.1",
+ "der 0.8.2",
 ]

 [[package]]
@@ -12399,7 +12407,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd"
 dependencies = [
 "fastrand",
- "getrandom 0.3.4",
+ "getrandom 0.4.3",
 "once_cell",
 "rustix",
 "windows-sys 0.61.2",
@@ -13651,6 +13659,15 @@ dependencies = [
 "windows-targets 0.52.6",
 ]

+[[package]]
+name = "windows-sys"
+version = "0.59.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+dependencies = [
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.60.2"
@@ -13823,7 +13840,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f3fd376f71958b862e7afb20cfe5a22830e1963462f3a17f49d82a6c1d1f42d"
 dependencies = [
 "bitflags 2.13.1",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]

 [[package]]
@@ -14095,7 +14112,7 @@ dependencies = [
 "typed-path",
 "zeroize",
 "zopfli",
- "zstd",
+ "zstd 0.13.3",
 ]

 [[package]]
@@ -14128,7 +14145,16 @@ version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e91ee311a569c327171651566e07972200e76fcfe2242a4fa446149a3881c08a"
 dependencies = [
- "zstd-safe",
+ "zstd-safe 7.3.0",
+]
+
+[[package]]
+name = "zstd"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf06bd8162af0734b344780deb55b42a2429ae430870d13fcc12f238e880fe6e"
+dependencies = [
+ "zstd-safe 8.0.0",
 ]

 [[package]]
@@ -14140,6 +14166,15 @@ dependencies = [
 "zstd-sys",
 ]

+[[package]]
+name = "zstd-safe"
+version = "8.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae42c0555055784c70058d19ba8e275528e8a99a706684868ace5da4e716a4ab"
+dependencies = [
+ "zstd-sys",
+]
+
 [[package]]
 name = "zstd-sys"
 version = "2.1.0+zstd.1.5.7"
@@ -191,6 +191,7 @@ rmp = { version = "0.8.15" }
 rmp-serde = { version = "1.3.1" }
 serde = { version = "1.0.229" }
 serde_ignored = { version = "0.1" }
+serde_with = { version = "3", default-features = false, features = ["macros", "std"] }
 serde_json = { version = "1.0.151" }
 serde_urlencoded = "0.7.1"

@@ -199,10 +200,10 @@ serde_urlencoded = "0.7.1"
 # matching stable releases are not available yet, while previous stable lines
 # have incompatible APIs. Keep them exact-pinned and monitor upstream for stable
 # releases.
-aes-gcm = { version = "=0.11.1" }
-argon2 = { version = "=0.6.0" }
-blake2 = "=0.11.0"
-chacha20poly1305 = { version = "=0.11.0" }
+aes-gcm = { version = "0.11.1" }
+argon2 = { version = "0.6.0" }
+blake2 = "0.11.0"
+chacha20poly1305 = { version = "0.11.0" }
 crc-fast = "1.10.0"
 hmac = { version = "0.13.0" }
 jsonwebtoken = { version = "11.0.0" }
@@ -256,10 +257,10 @@ clap = { version = "4.6.6" }
 const-str = { version = "1.1.0" }
 convert_case = "0.12.0"
 criterion = { version = "0.8" }
-crossbeam-queue = "0.3.13"
-crossbeam-channel = "0.5.16"
-crossbeam-deque = "0.8.7"
-crossbeam-utils = "0.8.22"
+crossbeam-queue = "0.3.14"
+crossbeam-channel = "0.5.17"
+crossbeam-deque = "0.8.8"
+crossbeam-utils = "0.8.23"
 datafusion = { default-features = false, version = "55.0.0" }
 derive_builder = "0.20.2"
 enumset = "1.1.14"
@@ -306,7 +307,7 @@ rustfs-erasure-codec = { version = "8.0.2" }
 reed-solomon-simd = "3.1.0"
 regex = { version = "1.13.1" }
 rumqttc = { package = "rumqttc-next", version = "0.34.0" }
-redis = { version = "1.6.0" }
+redis = { version = "1.7.0" }
 rustify = { version = "0.7", default-features = false }
 rustix = { version = "1.1.4" }
 rust-embed = { version = "8.12.0" }
@@ -343,7 +344,7 @@ windows = { version = "0.62.2" }
 windows-sys = "0.61.2"
 xxhash-rust = { version = "0.8.18" }
 zip = "8.6.0"
-zstd = "0.13.3"
+zstd = "0.14.0"

 # Observability and Metrics
 metrics = "0.24.6"
@@ -371,7 +372,8 @@ dav-server = "0.11.0"

 # Performance Analysis and Memory Profiling
 rustfs-mimalloc = { version = "0.5.3" }
-hotpath = { version = "0.25.0", default-features = false }
+# Preserve Unicode focus filters until rustfs/backlog#2302 is resolved.
+hotpath = { version = "=0.25.0", default-features = false }
 # Snapshot testing for output format regression detection
 insta = { version = "1.48" }

@@ -109,6 +109,15 @@ Star RustFS on GitHub and be instantly notified of new releases.

 ## Quickstart

+> [!IMPORTANT]
+> **Pool expansion notice:**
+>
+> - A single-node single-drive (SNSD) deployment is supported only as a standalone local path. It cannot expand in place or be added as a Pool. To move to a multi-drive topology, create a new deployment and migrate data through S3.
+> - Keep an existing multi-drive Pool's endpoints and Erasure Set width unchanged; expand by appending a new Pool. With ellipsis-based expansion, every Pool argument must contain an ellipsis expression and expand to at least two drive endpoints.
+> - Single-node multi-drive Pools and multi-node Pools with one drive per node are allowed, subject to valid Erasure Set geometry and EC settings; acceptance does not guarantee host-failure tolerance.
+>
+> These topology rules follow MinIO, but automatic parity selection differs between the projects. See the [Pool layout compatibility and regression tests](docs/testing/pool-layout-compatibility.md) before expanding a deployment.
+
 To get started with RustFS, follow these steps:

 ### 1. One-click Installation (Option 1)
@@ -89,6 +89,15 @@ RustFS 是一个基于 Rust 构建的高性能分布式对象存储系统。Rust

 ## 快速开始

+> [!IMPORTANT]
+> **Pool 扩容 Notice：**
+>
+> - 单节点单盘（SNSD）部署仅支持使用本地路径独立运行，不支持原地扩容，也不能作为 Pool 加入集群。如需改为多盘拓扑，请创建新部署并通过 S3 迁移数据。
+> - 已有多盘 Pool 的端点和 Erasure Set 宽度应保持不变，扩容应追加新的 Pool。使用省略号表达式扩容时，每个 Pool 参数都必须包含省略号表达式，并展开为至少两个磁盘端点。
+> - 允许单节点多盘 Pool，也允许多节点、每节点一盘的 Pool，但必须满足 Erasure Set 布局和 EC 配置要求；配置合法不代表能够容忍整台主机故障。
+>
+> 这些拓扑规则与 MinIO 一致，但两者的默认 parity 选择方式存在差异。扩容前请阅读 [Pool 布局兼容性与回归测试说明](docs/testing/pool-layout-compatibility.md)。
+
 请按照以下步骤快速上手 RustFS：

 ### 1. 一键安装脚本 (选项 1)
@@ -422,9 +422,9 @@ fn unix_now_ms() -> u64 {
        .unwrap_or(0)
 }

-/// A repair the MRF consumer landed, fanned out so retry ledgers can drop
-/// entries the journal no longer tracks (backlog#1894 axis B). The payload
-/// mirrors the intent identity so consumers match without re-parsing.
+/// Legacy, unverified repair notice. Its identity lacks kind, set scope,
+/// bucket incarnation and responsibility generation. Consumers must not use
+/// it to discharge persisted repair responsibility.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct MrfRepairedEvent {
    pub bucket: Arc<str>,
@@ -439,8 +439,8 @@ const MRF_REPAIRED_EVENT_CAP: usize = 4096;

 static MRF_REPAIRED_EVENTS: OnceLock<std::sync::Mutex<std::collections::VecDeque<MrfRepairedEvent>>> = OnceLock::new();

-/// Record that the MRF consumer landed a repair. Never blocks: the critical
-/// section is a deque push under a std mutex.
+/// Record a legacy notification for compatibility. This is not an
+/// acknowledgement of storage verification or durable repair completion.
 pub fn note_mrf_repaired(bucket: &str, object: &str, version_id: Option<[u8; 16]>) {
    let registry = MRF_REPAIRED_EVENTS.get_or_init(|| std::sync::Mutex::new(std::collections::VecDeque::new()));
    let Ok(mut events) = registry.lock() else {
@@ -515,6 +515,9 @@ mod tests {
        }
        coalescer_release(&key, Some(lease));
        let retry_lease = coalescer_admit(key.clone()).expect("released identity must admit a retry");
+        assert_ne!(lease, retry_lease);
+        coalescer_release(&key, Some(lease));
+        assert_eq!(coalescer_admit(key.clone()), Err(MrfIngressResult::Coalesced));
        coalescer_release(&key, Some(retry_lease));
    }

@@ -130,6 +130,52 @@ Scanner cycle budget controls:
  - timeout returns S3 `SlowDown`, so clients should use normal SDK retry handling.
  - this is not a fdatasync or group-commit switch. Track fdatasync batching separately with `rustfs_s3_put_object_rename_fdatasync_batch_files`.

+## Foreground write admission environment variables
+
+Large direct `PutObject` requests and multipart `UploadPart` requests share one
+per-process permit pool that bounds how many bodies are ingested and written
+concurrently. Small direct PUTs stay on the legacy path.
+
+- `RUSTFS_PUT_LARGE_FOREGROUND_ADMISSION_ENABLE`
+  - enables the default-on pool; `false` keeps only the soft request counter.
+  - default is `true`.
+- `RUSTFS_PUT_LARGE_FOREGROUND_ADMISSION_LIMIT`
+  - permits in the pool; `0` derives half of `RUSTFS_OBJECT_MAX_CONCURRENT_DISK_READS`, clamped to `32`.
+  - default is `0` (32 permits at stock settings).
+- `RUSTFS_PUT_LARGE_FOREGROUND_ADMISSION_MIN_SIZE_BYTES`
+  - smallest direct `PutObject` that takes a permit; unknown-size requests always do.
+  - default is `33554432` (32 MiB).
+- `RUSTFS_PUT_LARGE_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS`
+  - how long a direct `PutObject` waits for a permit before returning S3 `SlowDown`.
+  - default is `250`.
+- `RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_MIN_SIZE_BYTES`
+  - smallest `UploadPart` that takes a permit; `0` gates every part.
+  - default is `0`.
+- `RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS`
+  - how long an `UploadPart` waits in the bounded queue for a permit before returning S3 `SlowDown`; `0` rejects immediately when the pool is full.
+  - default is `30000`. Parts wait before body ingest, so SDK-default clients that send every part of an upload concurrently drain through the pool instead of failing.
+- `RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_MAX_PENDING`
+  - maximum `UploadPart` requests waiting for a permit at once; parts beyond it return `SlowDown` without waiting.
+  - default is `0`, which derives 16 times the permit limit (512 at stock settings).
+- `RUSTFS_PUT_FOREGROUND_ADMISSION_ENABLE`, `RUSTFS_PUT_FOREGROUND_ADMISSION_LIMIT`, `RUSTFS_PUT_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS`
+  - experimental strict gate that applies to every foreground write regardless of size and replaces the pool above when enabled.
+  - default is disabled; enabling it with limit `0` disables foreground write admission entirely.
+
+## Remote tier timeout environment variables
+
+- `RUSTFS_TIER_REMOTE_CONNECT_TIMEOUT_SECS`
+  - remote tier TCP connect timeout.
+  - default is `10`.
+  - must be positive; zero fails tier client initialization, while an invalid integer is logged and falls back to the default.
+- `RUSTFS_TIER_REMOTE_REQUEST_TIMEOUT_SECS`
+  - remote tier request timeout through response headers.
+  - default is `86400` so large transition uploads keep a production-safe budget.
+  - must be positive; zero fails tier client initialization, while an invalid integer is logged and falls back to the default. Very large values are accepted and act as a correspondingly long budget.
+- `RUSTFS_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS`
+  - maximum idle time between remote tier response-body chunks.
+  - default is `60`; the timer resets only when non-empty body data keeps progressing.
+  - must be positive; zero fails tier client initialization, while an invalid integer is logged and falls back to the default.
+
 ## Drive timeout environment variables

 - `RUSTFS_DRIVE_METADATA_TIMEOUT_SECS`
@@ -157,6 +203,14 @@ Drive timeout profile preset:
  - Then `RUSTFS_DRIVE_MAX_TIMEOUT_DURATION` legacy fallback.
  - Then the profile-derived default (`default` or `high_latency`).

+## Admin peer probe timeout
+
+- `RUSTFS_ADMIN_PEER_PROBE_TIMEOUT_SECS`
+  - total per-peer budget for the `server_info`/`storage_info` admin probe round; `server_info` may reconnect once and `storage_info` remains a single attempt.
+  - default is `10` seconds, preserving the previous two-attempt worst-case budget.
+  - values must be positive; `0` or an invalid value falls back to the default, and values above `60` are clamped to `60`.
+  - the setting is read by the aggregating node only; it does not change the internode RPC wire contract. Any retry shares one round deadline rather than receiving a fresh timeout.
+
 ## Startup filesystem boundary policy

 - `RUSTFS_UNSUPPORTED_FS_POLICY` controls startup behavior when RustFS detects local endpoint filesystems that are outside the supported production boundary.
@@ -39,6 +39,15 @@ pub const DEFAULT_INTERNODE_HTTP2_KEEPALIVE_TIMEOUT_SECS: u64 = 20;
 pub const ENV_INTERNODE_RPC_TIMEOUT_SECS: &str = "RUSTFS_INTERNODE_RPC_TIMEOUT_SECS";
 pub const DEFAULT_INTERNODE_RPC_TIMEOUT_SECS: u64 = 30;

+/// Total budget for one admin peer probe round, including any reconnect retry.
+///
+/// This is intentionally separate from the transport-level RPC timeout: admin
+/// probes may retry once, but the retry must consume the same round budget.
+pub const ENV_ADMIN_PEER_PROBE_TIMEOUT_SECS: &str = "RUSTFS_ADMIN_PEER_PROBE_TIMEOUT_SECS";
+pub const DEFAULT_ADMIN_PEER_PROBE_TIMEOUT_SECS: u64 = 10;
+pub const MAX_ADMIN_PEER_PROBE_TIMEOUT_SECS: u64 = 60;
+const _: () = assert!(DEFAULT_ADMIN_PEER_PROBE_TIMEOUT_SECS <= MAX_ADMIN_PEER_PROBE_TIMEOUT_SECS);
+
 // ── Client-side internode gRPC channel tuning (P0) ──
 // These mirror the server-side HTTP/2 transport tuning in `rustfs/src/server/http.rs`
 // on the *client* `tonic` `Endpoint` used for internode control-plane RPCs. Prior to
@@ -312,6 +321,7 @@ mod tests {
        assert_eq!(DEFAULT_INTERNODE_HTTP2_KEEPALIVE_INTERVAL_SECS, 5);
        assert_eq!(DEFAULT_INTERNODE_HTTP2_KEEPALIVE_TIMEOUT_SECS, 20);
        assert_eq!(DEFAULT_INTERNODE_RPC_TIMEOUT_SECS, 30);
+        assert_eq!(DEFAULT_ADMIN_PEER_PROBE_TIMEOUT_SECS, 10);
        assert_eq!(DEFAULT_INTERNODE_HTTP_TUNING_PROFILE, "legacy");
    }

@@ -412,6 +422,7 @@ mod tests {
            "RUSTFS_INTERNODE_HTTP2_KEEPALIVE_TIMEOUT_SECS"
        );
        assert_eq!(ENV_INTERNODE_RPC_TIMEOUT_SECS, "RUSTFS_INTERNODE_RPC_TIMEOUT_SECS");
+        assert_eq!(ENV_ADMIN_PEER_PROBE_TIMEOUT_SECS, "RUSTFS_ADMIN_PEER_PROBE_TIMEOUT_SECS");
        assert_eq!(ENV_INTERNODE_HTTP_TUNING_PROFILE, "RUSTFS_INTERNODE_HTTP_TUNING_PROFILE");
        assert_eq!(ENV_INTERNODE_HTTP_POOL_MAX_IDLE_PER_HOST, "RUSTFS_INTERNODE_HTTP_POOL_MAX_IDLE_PER_HOST");
        assert_eq!(ENV_INTERNODE_HTTP_POOL_IDLE_TIMEOUT_SECS, "RUSTFS_INTERNODE_HTTP_POOL_IDLE_TIMEOUT_SECS");
@@ -137,6 +137,28 @@ pub const DEFAULT_TIER_REMOTE_VERSION_STATE_FLEET_CONFIRMED: bool = false;
 const _: () = assert!(!DEFAULT_TIER_REMOTE_VERSION_STATE_WRITE);
 const _: () = assert!(!DEFAULT_TIER_REMOTE_VERSION_STATE_FLEET_CONFIRMED);

+/// Environment variable for remote tier TCP connect timeout in seconds.
+pub const ENV_TIER_REMOTE_CONNECT_TIMEOUT_SECS: &str = "RUSTFS_TIER_REMOTE_CONNECT_TIMEOUT_SECS";
+/// Default remote tier TCP connect timeout in seconds.
+pub const DEFAULT_TIER_REMOTE_CONNECT_TIMEOUT_SECS: u64 = 10;
+
+/// Environment variable for the remote tier request timeout in seconds.
+///
+/// This bounds upload/download request progress through response headers. The
+/// default is intentionally large so multi-TiB transition uploads keep their
+/// previous production budget while black-hole remotes no longer wait forever.
+pub const ENV_TIER_REMOTE_REQUEST_TIMEOUT_SECS: &str = "RUSTFS_TIER_REMOTE_REQUEST_TIMEOUT_SECS";
+/// Default remote tier request timeout in seconds.
+pub const DEFAULT_TIER_REMOTE_REQUEST_TIMEOUT_SECS: u64 = 24 * 60 * 60;
+
+/// Environment variable for remote tier response-body idle timeout in seconds.
+///
+/// The timer is re-armed on every non-empty response-body chunk, so slow but
+/// progressing remotes can continue while silent response bodies are cancelled.
+pub const ENV_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS: &str = "RUSTFS_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS";
+/// Default remote tier response-body idle timeout in seconds.
+pub const DEFAULT_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS: u64 = 60;
+
 /// Request the object-transaction fencing contract used by storage-owned
 /// cleanup receipts and lock-window optimizations.
 ///
@@ -343,13 +365,36 @@ pub const ENV_PUT_MULTIPART_FOREGROUND_ADMISSION_MIN_SIZE_BYTES: &str =
    "RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_MIN_SIZE_BYTES";
 pub const DEFAULT_PUT_MULTIPART_FOREGROUND_ADMISSION_MIN_SIZE_BYTES: usize = 0;

-/// Time in milliseconds an automatic foreground write waits for a permit.
+/// Time in milliseconds an automatic foreground direct PutObject waits for a permit.
 ///
 /// A short wait smooths transient bursts while still returning S3
 /// `SlowDown`/503 before body ingest when the node is already saturated.
 pub const ENV_PUT_LARGE_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS: &str = "RUSTFS_PUT_LARGE_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS";
 pub const DEFAULT_PUT_LARGE_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS: u64 = 250;

+/// Time in milliseconds a multipart UploadPart waits for a foreground write permit.
+///
+/// SDK-default multipart clients send every part of an upload concurrently, so
+/// a single node routinely sees several times more parts in flight than the
+/// permit pool allows. Those parts have not ingested a body yet, so queueing
+/// them costs a connection rather than memory or internode streams; the pool
+/// still bounds the number of parts being written. The wait is long enough for
+/// an ordinary queue to drain on modest hardware, and a part that cannot get a
+/// permit within it fails with S3 `SlowDown`/503 for the client to retry.
+/// `0` rejects immediately when the pool is full.
+pub const ENV_PUT_MULTIPART_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS: &str =
+    "RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS";
+pub const DEFAULT_PUT_MULTIPART_FOREGROUND_ADMISSION_WAIT_TIMEOUT_MS: u64 = 30_000;
+
+/// Maximum multipart UploadPart requests waiting for a foreground write permit per process.
+///
+/// Parts beyond this queue depth are rejected with S3 `SlowDown`/503 without
+/// waiting, so a genuinely saturated node still fails fast instead of holding
+/// an unbounded set of connections open for the whole wait timeout.
+/// `0` derives the depth from the permit limit.
+pub const ENV_PUT_MULTIPART_FOREGROUND_ADMISSION_MAX_PENDING: &str = "RUSTFS_PUT_MULTIPART_FOREGROUND_ADMISSION_MAX_PENDING";
+pub const DEFAULT_PUT_MULTIPART_FOREGROUND_ADMISSION_MAX_PENDING: usize = 0;
+
 const _: () = assert!(DEFAULT_PUT_LARGE_FOREGROUND_ADMISSION_ENABLE);

 /// Environment variable for minimum GetObject timeout in seconds.
@@ -812,6 +857,16 @@ mod remote_version_state_tests {
        );
    }

+    #[test]
+    fn remote_tier_timeout_env_names_are_stable() {
+        assert_eq!(super::ENV_TIER_REMOTE_CONNECT_TIMEOUT_SECS, "RUSTFS_TIER_REMOTE_CONNECT_TIMEOUT_SECS");
+        assert_eq!(super::ENV_TIER_REMOTE_REQUEST_TIMEOUT_SECS, "RUSTFS_TIER_REMOTE_REQUEST_TIMEOUT_SECS");
+        assert_eq!(
+            super::ENV_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS,
+            "RUSTFS_TIER_REMOTE_RESPONSE_BODY_IDLE_TIMEOUT_SECS"
+        );
+    }
+
    #[test]
    fn data_movement_part_checksum_gate_uses_stable_environment_names() {
        assert_eq!(super::ENV_DATA_MOVEMENT_PART_CHECKSUMS_WRITE, "RUSTFS_DATA_MOVEMENT_PART_CHECKSUMS_WRITE");
@@ -26,6 +26,7 @@ Registered in [`src/lib.rs`](src/lib.rs). Grouped by concern:
 | **protocols** | [`src/protocols/`](src/protocols) | FTPS, WebDAV, SFTP compliance. Fixed ports, own guide: [`src/protocols/README.md`](src/protocols/README.md) |
 | **reliant** | [`src/reliant/`](src/reliant) | Tests that reuse an **externally started** server (SQL/select, conditional writes, lifecycle, deleted-object reads, node-interact). Run via [`scripts/run_e2e_tests.sh`](../../scripts/run_e2e_tests.sh); see [`src/reliant/README.md`](src/reliant/README.md) |
 | **cluster** | `cluster_concurrency_test`, `stale_multipart_cleanup_cluster_test`, `namespace_lock_quorum_test`, `admin_timeout_regression_test`, `object_lambda_test`, `replication_extension_test`, `tier_stats_cluster_test` | Multi-node scenarios via `RustFSTestClusterEnvironment` |
+| **distributed 4×4** | [`src/distributed/`](src/distributed) | Storage-sensitive PR and nightly `e2e-distributed` lane: S3, object lock/WORM, versioning, bucket/site replication, quota, expand/decommission/rebalance, concurrency, chaos, 4-node upgrade of historical data and IAM AK/SK. Map: [`docs/testing/distributed-e2e.md`](../../docs/testing/distributed-e2e.md) |
 | **chaos / reliability** | [`src/chaos.rs`](src/chaos.rs), `reliability_disk_fault_test`, `heal_erasure_disk_rebuild_test`, `server_startup_failfast_test` | Disk offline/replace/corrupt, EC rebuild, heal, fail-fast startup |
 | **upgrade compatibility** | `upgrade_compatibility_test` | Pinned previous-release writes followed by current-build reads on the same data directory |

@@ -171,6 +172,7 @@ the same profile for membership and execution with one nightly worker.
 | KMS suite | `e2e-full` job, merge queue + main | **Active** |
 | Direct and mixed-version rolling upgrades from pinned previous release | `e2e-upgrade.yml`, storage-sensitive PRs + release tags + weekly | **Active** |
 | Cluster faults (`e2e-nightly` profile) | consolidated nightly workflow | **Active** (backlog#1149 ci-7) |
+| Distributed 4-node 4-disk (`e2e-distributed` profile) | `.github/workflows/e2e-distributed.yml` | **Active** (storage-sensitive PR / nightly / dispatch) |
 | Protocols (FTPS/WebDAV/SFTP) | consolidated nightly workflow, serial | **Active** (backlog#1149 ci-7) |
 | Replication (fast subset) | `e2e-smoke` profile, `e2e-tests` job, every PR | **Active** (backlog#1147 repl-1) |
 | Replication (slow + multi-node) | `e2e-repl-nightly` profile, consolidated nightly workflow | **Active** (backlog#1147 repl-1) |
@@ -182,6 +184,8 @@ the wiring source of truth. Committed test-ID digests under

 ## Troubleshooting

+**Endpoint blackhole scenario skipped** — `heal_erasure_disk_rebuild_test::tests::test_cluster_root_heal_recovers_after_target_endpoint_blackhole` installs a loopback `iptables` DROP rule and therefore needs `CAP_NET_ADMIN` (root or passwordless `sudo -n iptables`). A host where `iptables` is missing or cannot read the OUTPUT chain (typical inside an unprivileged container, where the nf_tables backend reports "Permission denied" even under `sudo`) logs a `heal_interruption_skipped` warning and returns without exercising heal. Set `RUSTFS_E2E_REQUIRE_NET_FAULT_INJECTION=1` on lanes that do provision the capability so a broken runner fails instead of skipping.
+
 **Reproduce a CI failure locally** — run the exact profile/lane:

 ```bash
@@ -191,6 +195,9 @@ cargo nextest run --profile e2e-smoke -p e2e_test
 cargo nextest run --profile e2e-full -p e2e_test
 # Cluster fault nightly lane
 cargo nextest run --profile e2e-nightly -p e2e_test
+# 4-node 4-disk distributed lane (S3 / lock / versioning / replication / decommission / chaos / upgrade)
+# Upgrade cases need RUSTFS_UPGRADE_SOURCE_BINARY; without it they fail closed.
+cargo nextest run --profile e2e-distributed -p e2e_test
 # Replication nightly lane; awscurl is required for STS paths
 cargo nextest run --profile e2e-repl-nightly -p e2e_test
 # Fixed-port protocol nightly lane
@@ -0,0 +1,74 @@
+// Copyright 2024 RustFS Team
+// Licensed under the Apache License, Version 2.0.
+
+use std::path::Path;
+use std::process::Command;
+
+fn git(root: &Path, args: &[&str]) -> Option<String> {
+    let output = Command::new("git").args(args).current_dir(root).output().ok()?;
+    output
+        .status
+        .success()
+        .then(|| String::from_utf8_lossy(&output.stdout).trim().to_owned())
+}
+
+fn emit(name: &str, value: &str) {
+    let value = if value.contains(['\n', '\r']) { "unknown" } else { value };
+    println!("cargo:rustc-env=RUSTFS_E2E_BUILD_{name}={value}");
+}
+
+fn main() {
+    let manifest = std::env::var_os("CARGO_MANIFEST_DIR").unwrap_or_default();
+    let root = Path::new(&manifest).join("../..");
+    // Cover dependency/common sources as well as this crate. HEAD/ref/index
+    // changes must refresh identity even when no Rust source mtime changes.
+    for path in [
+        "crates",
+        "rustfs",
+        "Cargo.toml",
+        "Cargo.lock",
+        "rust-toolchain.toml",
+        ".cargo",
+        ".config",
+    ] {
+        println!("cargo:rerun-if-changed={}", root.join(path).display());
+    }
+    let mut git_paths = vec!["HEAD".to_owned(), "index".to_owned(), "packed-refs".to_owned()];
+    if let Some(reference) = git(&root, &["symbolic-ref", "-q", "HEAD"]) {
+        git_paths.push(reference);
+    }
+    for path in git_paths {
+        if let Some(path) = git(&root, &["rev-parse", "--git-path", &path]) {
+            let path = Path::new(&path);
+            let path = if path.is_absolute() {
+                path.to_owned()
+            } else {
+                root.join(path)
+            };
+            if path.exists() {
+                println!("cargo:rerun-if-changed={}", path.display());
+            }
+        }
+    }
+    let revision = git(&root, &["rev-parse", "HEAD"]).unwrap_or_else(|| "unknown".to_owned());
+    let dirty = git(&root, &["status", "--porcelain", "--untracked-files=normal"]).is_none_or(|status| !status.is_empty());
+    let lock = git(&root, &["hash-object", "Cargo.lock"]).unwrap_or_else(|| "unknown".to_owned());
+    let mut features = std::env::vars()
+        .filter_map(|(key, _)| {
+            key.strip_prefix("CARGO_FEATURE_")
+                .map(|name| name.to_ascii_lowercase().replace('_', "-"))
+        })
+        .collect::<Vec<_>>();
+    features.sort();
+    emit("COMMIT", &revision);
+    emit("DIRTY", if dirty { "true" } else { "false" });
+    emit("LOCK", &lock);
+    emit("FEATURES", &features.join(","));
+    for name in ["TARGET", "PROFILE"] {
+        emit(name, &std::env::var(name).unwrap_or_else(|_| "unknown".to_owned()));
+    }
+    println!("cargo:rerun-if-env-changed=CARGO_ENCODED_RUSTFLAGS");
+    let flags = std::env::var("CARGO_ENCODED_RUSTFLAGS").unwrap_or_default();
+    let flags: String = flags.as_bytes().iter().map(|byte| format!("{byte:02x}")).collect();
+    emit("RUSTFLAGS_HEX", &flags);
+}
@@ -55,18 +55,20 @@ type ChaosResult<T> = Result<T, Box<dyn Error + Send + Sync>>;
 /// A successful S3 GET only proves that a quorum can serve an object. Replacement
 /// tests need this lower-level record to prove that the rebuilt target holds the
 /// `xl.meta` selected for a specific version and every `part.N` it declares.
-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
 pub(crate) struct VersionShardCensus {
    pub version_id: Option<String>,
    pub has_xl_meta: bool,
    pub data_dir: Option<String>,
    pub erasure_index: Option<usize>,
+    pub data_blocks: Option<usize>,
+    pub parity_blocks: Option<usize>,
    pub expected_part_numbers: BTreeSet<usize>,
    pub present_part_fingerprints: BTreeMap<usize, PartShardFingerprint>,
    pub inline_data_fingerprint: Option<PartShardFingerprint>,
 }

-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
 pub(crate) struct PartShardFingerprint {
    pub size: u64,
    pub sha256: String,
@@ -88,13 +90,15 @@ impl VersionShardCensus {
            && manifest.is_complete()
            && self.data_dir == manifest.data_dir
            && self.erasure_index == manifest.erasure_index
+            && self.data_blocks == manifest.data_blocks
+            && self.parity_blocks == manifest.parity_blocks
            && self.expected_part_numbers == manifest.expected_part_numbers
            && self.present_part_fingerprints == manifest.present_part_fingerprints
            && self.inline_data_fingerprint == manifest.inline_data_fingerprint
    }
 }

-fn sha256_hex(data: &[u8]) -> String {
+pub(crate) fn sha256_hex(data: &[u8]) -> String {
    let digest = Sha256::digest(data);
    digest.iter().map(|byte| format!("{byte:02x}")).collect()
 }
@@ -313,6 +317,8 @@ pub(crate) fn census_object_version_on_disk(
            has_xl_meta: false,
            data_dir: None,
            erasure_index: None,
+            data_blocks: None,
+            parity_blocks: None,
            expected_part_numbers: BTreeSet::new(),
            present_part_fingerprints: BTreeMap::new(),
            inline_data_fingerprint: None,
@@ -360,6 +366,8 @@ pub(crate) fn census_object_version_on_disk(
        has_xl_meta: true,
        data_dir,
        erasure_index,
+        data_blocks: Some(file_info.erasure.data_blocks),
+        parity_blocks: Some(file_info.erasure.parity_blocks),
        expected_part_numbers,
        present_part_fingerprints,
        inline_data_fingerprint,
@@ -413,6 +421,8 @@ mod tests {
            has_xl_meta: true,
            data_dir: Some("data-dir".to_string()),
            erasure_index: Some(3),
+            data_blocks: Some(2),
+            parity_blocks: Some(2),
            expected_part_numbers: BTreeSet::from([1]),
            present_part_fingerprints: BTreeMap::from([(1, shard_fingerprint(b"part").unwrap())]),
            inline_data_fingerprint: None,
@@ -57,6 +57,8 @@ const RUSTFS_FULL_FEATURE: &str = "full";
 const TEST_PORT_MIN: u16 = 20_000;
 // Keep allocator ports below the ephemeral range used by bind(..., 0) test helpers.
 const TEST_PORT_RANGE: u16 = 10_000;
+const TEST_PORT_MIN_ENV: &str = "RUSTFS_E2E_TEST_PORT_MIN";
+const TEST_PORT_RANGE_ENV: &str = "RUSTFS_E2E_TEST_PORT_RANGE";
 const TEST_PORT_COUNTER_PATH: &str = "/tmp/rustfs_e2e_next_port";
 const TEST_PORT_LOCK_DIR: &str = "/tmp/rustfs_e2e_port_allocator.lock";
 const TEST_PORT_LOCK_STALE_AFTER: Duration = Duration::from_secs(30);
@@ -99,22 +101,74 @@ impl Drop for PortAllocatorGuard {
    }
 }

-fn advance_test_port(port: u16) -> u16 {
-    let offset = (port - TEST_PORT_MIN + 1) % TEST_PORT_RANGE;
-    TEST_PORT_MIN + offset
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+struct TestPortAllocatorConfig {
+    min: u16,
+    range: u16,
 }

-fn seeded_test_port() -> u16 {
-    let offset = (Uuid::new_v4().as_u128() % u128::from(TEST_PORT_RANGE)) as u16;
-    TEST_PORT_MIN + offset
+impl TestPortAllocatorConfig {
+    fn max_exclusive(self) -> u32 {
+        u32::from(self.min) + u32::from(self.range)
+    }
+
+    fn contains(self, port: &u16) -> bool {
+        (u32::from(self.min)..self.max_exclusive()).contains(&u32::from(*port))
+    }
 }

-fn read_next_test_port() -> u16 {
+fn parse_test_port_allocator_config(
+    min_override: Option<&str>,
+    range_override: Option<&str>,
+) -> Result<TestPortAllocatorConfig, Box<dyn std::error::Error + Send + Sync>> {
+    let min = match min_override {
+        Some(value) => value
+            .parse::<u16>()
+            .map_err(|err| format!("{TEST_PORT_MIN_ENV} must be a valid u16: {err}"))?,
+        None => TEST_PORT_MIN,
+    };
+    let range = match range_override {
+        Some(value) => value
+            .parse::<u16>()
+            .map_err(|err| format!("{TEST_PORT_RANGE_ENV} must be a valid u16: {err}"))?,
+        None => TEST_PORT_RANGE,
+    };
+    if range == 0 {
+        return Err(format!("{TEST_PORT_RANGE_ENV} must be greater than zero").into());
+    }
+    if min < 1024 {
+        return Err(format!("{TEST_PORT_MIN_ENV} must be at least 1024").into());
+    }
+    let max_exclusive = u32::from(min) + u32::from(range);
+    if max_exclusive > u32::from(u16::MAX) + 1 {
+        return Err(format!("{TEST_PORT_MIN_ENV} + {TEST_PORT_RANGE_ENV} exceeds u16 port space").into());
+    }
+    Ok(TestPortAllocatorConfig { min, range })
+}
+
+fn test_port_allocator_config() -> Result<TestPortAllocatorConfig, Box<dyn std::error::Error + Send + Sync>> {
+    parse_test_port_allocator_config(
+        std::env::var(TEST_PORT_MIN_ENV).ok().as_deref(),
+        std::env::var(TEST_PORT_RANGE_ENV).ok().as_deref(),
+    )
+}
+
+fn advance_test_port(port: u16, config: TestPortAllocatorConfig) -> u16 {
+    let offset = (port - config.min + 1) % config.range;
+    config.min + offset
+}
+
+fn seeded_test_port(config: TestPortAllocatorConfig) -> u16 {
+    let offset = (Uuid::new_v4().as_u128() % u128::from(config.range)) as u16;
+    config.min + offset
+}
+
+fn read_next_test_port(config: TestPortAllocatorConfig) -> u16 {
    stdfs::read_to_string(TEST_PORT_COUNTER_PATH)
        .ok()
        .and_then(|value| value.trim().parse::<u16>().ok())
-        .filter(|port| (TEST_PORT_MIN..TEST_PORT_MIN + TEST_PORT_RANGE).contains(port))
-        .unwrap_or_else(seeded_test_port)
+        .filter(|port| config.contains(port))
+        .unwrap_or_else(|| seeded_test_port(config))
 }

 fn remove_stale_port_allocator_lock() {
@@ -629,11 +683,12 @@ impl RustFSTestEnvironment {
    pub async fn find_available_port() -> Result<u16, Box<dyn std::error::Error + Send + Sync>> {
        use std::net::TcpListener;
        let _guard = PortAllocatorGuard::acquire().await?;
-        let mut next_port = read_next_test_port();
+        let config = test_port_allocator_config()?;
+        let mut next_port = read_next_test_port(config);

-        for _ in 0..TEST_PORT_RANGE {
+        for _ in 0..config.range {
            let port = next_port;
-            next_port = advance_test_port(next_port);
+            next_port = advance_test_port(next_port, config);
            write_next_test_port(next_port)?;

            if let Ok(listener) = TcpListener::bind(("127.0.0.1", port)) {
@@ -1700,6 +1755,69 @@ impl RustFSTestClusterEnvironment {
        Ok(())
    }

+    /// Append a new single-node erasure pool to a stopped multi-pool cluster.
+    ///
+    /// Used to simulate pool expansion on localhost: every pool already owns
+    /// exactly one node with `drives_per_node >= 2` (the only multi-pool layout
+    /// the single-host `RUSTFS_VOLUMES` syntax can express). The new node is
+    /// allocated a fresh port and empty drive directories; callers must
+    /// [`Self::start`] afterwards so every process picks up the extended
+    /// volumes argument. Existing data directories are left untouched.
+    pub async fn append_single_node_pool(&mut self) -> Result<usize, Box<dyn std::error::Error + Send + Sync>> {
+        if self.nodes.iter().any(|node| node.process.is_some()) {
+            return Err("stop the cluster before appending a pool".into());
+        }
+        if self.topology.drives_per_node < 2 {
+            return Err(
+                "append_single_node_pool requires drives_per_node >= 2 (the server parser rejects a single-drive ellipses pool)"
+                    .into(),
+            );
+        }
+
+        let mut pools = self.topology.normalized_pools();
+        for (pool_idx, nodes) in pools.iter().enumerate() {
+            if nodes.len() != 1 {
+                return Err(format!(
+                    "pool {pool_idx} spans {} nodes; append_single_node_pool requires one node per pool",
+                    nodes.len()
+                )
+                .into());
+            }
+        }
+
+        let new_idx = self.nodes.len();
+        let port = RustFSTestEnvironment::find_available_port().await?;
+        let address = format!("127.0.0.1:{port}");
+        let data_dirs: Vec<String> = (0..self.topology.drives_per_node)
+            .map(|drive| format!("{}/node{}/drive{}", self.temp_dir, new_idx, drive))
+            .collect();
+        for dir in &data_dirs {
+            fs::create_dir_all(dir).await?;
+        }
+
+        self.nodes.push(ClusterNode {
+            url: format!("http://{address}"),
+            address,
+            data_dir: data_dirs[0].clone(),
+            data_dirs,
+            pool_idx: pools.len(),
+            process: None,
+        });
+        pools.push(vec![new_idx]);
+        self.topology.node_count = self.nodes.len();
+        self.topology.pools = pools;
+        self.node_extra_env.push(Vec::new());
+        self.node_capture_log_paths.push(None);
+        self.volume_proxy_addresses.push(None);
+
+        if !self.extra_env.iter().any(|(key, _)| key == "RUSTFS_UNSAFE_BYPASS_DISK_CHECK") {
+            self.extra_env
+                .push(("RUSTFS_UNSAFE_BYPASS_DISK_CHECK".to_string(), "true".to_string()));
+        }
+
+        Ok(new_idx)
+    }
+
    /// Gracefully stop one cluster node and wait for its process to exit.
    ///
    /// This is intentionally separate from [`Self::stop_node`]: the latter is
@@ -2045,6 +2163,35 @@ mod tests {
        );
    }

+    #[test]
+    fn e2e_port_allocator_uses_default_range() {
+        assert_eq!(
+            parse_test_port_allocator_config(None, None).expect("default port allocator config"),
+            TestPortAllocatorConfig {
+                min: TEST_PORT_MIN,
+                range: TEST_PORT_RANGE
+            }
+        );
+    }
+
+    #[test]
+    fn e2e_port_allocator_accepts_explicit_test_range() {
+        let config = parse_test_port_allocator_config(Some("31000"), Some("128")).expect("explicit port range");
+
+        assert_eq!(advance_test_port(31127, config), 31000);
+        assert!(config.contains(&31000));
+        assert!(config.contains(&31127));
+        assert!(!config.contains(&31128));
+    }
+
+    #[test]
+    fn e2e_port_allocator_rejects_invalid_override() {
+        assert!(parse_test_port_allocator_config(Some("1023"), Some("1")).is_err());
+        assert!(parse_test_port_allocator_config(Some("65000"), Some("1000")).is_err());
+        assert!(parse_test_port_allocator_config(Some("31000"), Some("0")).is_err());
+        assert!(parse_test_port_allocator_config(Some("not-a-port"), Some("128")).is_err());
+    }
+
    #[test]
    fn resolves_rustfs_binary_in_configured_cargo_target_directory() {
        let workspace = Path::new("workspace");
@@ -35,11 +35,15 @@ where
 {
    let mut last_usage = DataUsageInfo::default();
    let mut last_query_error = None;
-    for _ in 0..45 {
+    for _ in 0..90 {
        match get_data_usage_info(env).await {
            Ok(usage) => {
                last_query_error = None;
-                if usage.buckets_usage.contains_key(bucket) && predicate(&usage) {
+                if usage.is_complete_bucket_usage_snapshot()
+                    && usage.usage_snapshot_converged != Some(false)
+                    && usage.buckets_usage.contains_key(bucket)
+                    && predicate(&usage)
+                {
                    return Ok(usage);
                }
                last_usage = usage;
@@ -0,0 +1,222 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DistCluster, DistLayout, TestResult, assert_object_bytes, payload_for, put_object, retrying_get_equals, unique_bucket,
+    wait_for_ready, wait_until,
+};
+use crate::chaos::{census_object_version_on_disk, signed_admin_post};
+use crate::common::{build_test_s3_config, init_logging};
+use crate::fault_proxy::FaultMode;
+use aws_sdk_s3::Client;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::sync::{Barrier, mpsc};
+use tokio::time::timeout;
+
+#[tokio::test]
+async fn kill_and_restart_node_preserves_objects() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("killnode");
+    dist.create_bucket(&bucket).await?;
+    let body = vec![0x11u8; 128 * 1024];
+    put_object(&dist.client(0)?, &bucket, "keep.bin", body.clone()).await?;
+
+    dist.cluster.stop_node(3)?;
+    retrying_get_equals(&dist.client(0)?, &bucket, "keep.bin", &body, Duration::from_secs(20)).await?;
+
+    dist.cluster.start_node(3).await?;
+    wait_for_ready(&dist.cluster).await?;
+    assert_object_bytes(&dist.client(3)?, &bucket, "keep.bin", &body).await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn full_cluster_restart_preserves_objects() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("pwr");
+    dist.create_bucket(&bucket).await?;
+    let body = vec![0x44u8; 64 * 1024];
+    put_object(&dist.client(1)?, &bucket, "survive.bin", body.clone()).await?;
+
+    dist.cluster.stop();
+    dist.cluster.start().await?;
+    wait_for_ready(&dist.cluster).await?;
+    for node_idx in 0..dist.cluster.nodes.len() {
+        assert_object_bytes(&dist.client(node_idx)?, &bucket, "survive.bin", &body).await?;
+    }
+    Ok(())
+}
+
+#[tokio::test]
+async fn fresh_drive_replacement_is_physically_healed_without_data_change() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start_with_env(DistLayout::FourByFour, &[("RUSTFS_HEAL_ENABLED", "true")]).await?;
+    let bucket = unique_bucket("baddrive");
+    dist.create_bucket(&bucket).await?;
+    let body = payload_for("fresh-drive/durable.bin", 8 * 1024 * 1024);
+    put_object(&dist.client(1)?, &bucket, "durable.bin", body.clone()).await?;
+
+    let replaced_drive = PathBuf::from(&dist.cluster.nodes[0].data_dirs[0]);
+    let baseline = census_object_version_on_disk(&replaced_drive, &bucket, "durable.bin", None)?;
+    assert!(
+        baseline.is_complete(),
+        "replacement target did not hold a complete baseline shard: {baseline:?}"
+    );
+    assert!(
+        !baseline.expected_part_numbers.is_empty(),
+        "replacement witness must use physical part shards: {baseline:?}"
+    );
+
+    dist.cluster.stop_node(0)?;
+    let format_path = replaced_drive.join(".rustfs.sys/format.json");
+    let format = std::fs::read(&format_path)?;
+    let retired_drive = PathBuf::from(format!("{}.retired", replaced_drive.display()));
+    std::fs::rename(&replaced_drive, &retired_drive)?;
+    std::fs::create_dir_all(format_path.parent().ok_or("replacement format path omitted parent")?)?;
+    std::fs::write(&format_path, format)?;
+    let empty = census_object_version_on_disk(&replaced_drive, &bucket, "durable.bin", None)?;
+    assert!(!empty.has_xl_meta, "fresh replacement unexpectedly retained object metadata: {empty:?}");
+
+    dist.cluster.start_node(0).await?;
+    wait_for_ready(&dist.cluster).await?;
+    let heal_body =
+        r#"{"recursive":true,"dryRun":false,"remove":false,"recreate":true,"scanMode":2,"updateParity":false,"nolock":false}"#;
+    let heal_url = format!("{}/rustfs/admin/v3/heal/{bucket}?forceStart=true", dist.cluster.nodes[1].url);
+    signed_admin_post(&heal_url, Some(heal_body), &dist.cluster.access_key, &dist.cluster.secret_key).await?;
+    wait_until(
+        Duration::from_secs(90),
+        || async {
+            let healed = census_object_version_on_disk(&replaced_drive, &bucket, "durable.bin", None)?;
+            Ok(healed.matches_manifest(&baseline))
+        },
+        "fresh replacement contains the original complete shard manifest",
+    )
+    .await?;
+
+    for node_idx in 0..dist.cluster.nodes.len() {
+        assert_object_bytes(&dist.client(node_idx)?, &bucket, "durable.bin", &body).await?;
+    }
+    Ok(())
+}
+
+#[tokio::test]
+async fn concurrent_gets_survive_peer_node_kill() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("getkill");
+    dist.create_bucket(&bucket).await?;
+    let body = payload_for("inflight/steady.bin", 8 * 1024 * 1024);
+    put_object(&dist.client(0)?, &bucket, "steady.bin", body.clone()).await?;
+
+    let live: Vec<_> = (0..3).map(|idx| dist.client(idx)).collect::<Result<Vec<_>, _>>()?;
+    let worker_count = 12;
+    let release = Arc::new(Barrier::new(worker_count + 1));
+    let (started_tx, mut started_rx) = mpsc::unbounded_channel();
+    let mut handles = Vec::new();
+    for idx in 0..worker_count {
+        let client = live[idx % live.len()].clone();
+        let bucket = bucket.clone();
+        let body = body.clone();
+        let release = release.clone();
+        let started_tx = started_tx.clone();
+        handles.push(tokio::spawn(async move {
+            let response = client.get_object().bucket(&bucket).key("steady.bin").send().await?;
+            if response.content_length() != Some(body.len() as i64) {
+                return Err::<(), Box<dyn std::error::Error + Send + Sync>>(
+                    format!("worker {idx} received a wrong content length").into(),
+                );
+            }
+            started_tx.send(idx)?;
+            release.wait().await;
+            let actual = response.body.collect().await?.into_bytes();
+            if actual.as_ref() != body.as_slice() {
+                return Err(format!("worker {idx} received corrupted bytes after peer kill").into());
+            }
+            Ok(())
+        }));
+    }
+    drop(started_tx);
+    for _ in 0..worker_count {
+        timeout(Duration::from_secs(30), started_rx.recv())
+            .await?
+            .ok_or("a streaming GET exited before reaching the kill barrier")?;
+    }
+
+    dist.cluster.stop_node(3)?;
+    release.wait().await;
+    for handle in handles {
+        handle.await??;
+    }
+
+    dist.cluster.start_node(3).await?;
+    wait_for_ready(&dist.cluster).await?;
+    assert_object_bytes(&dist.client(3)?, &bucket, "steady.bin", &body).await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn blackholed_node_client_network_preserves_cluster_availability_and_recovers() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let proxy = crate::fault_proxy::FaultProxy::start(dist.cluster.nodes[3].address.parse()?).await?;
+    let proxied_url = format!("http://{}", proxy.local_addr());
+    let proxied_client = Client::from_conf(build_test_s3_config(
+        &proxied_url,
+        &dist.cluster.access_key,
+        &dist.cluster.secret_key,
+        None,
+        "distributed-network-chaos",
+    ));
+
+    let result: TestResult = async {
+        let bucket = unique_bucket("netfault");
+        dist.create_bucket(&bucket).await?;
+        let baseline = payload_for("network/baseline.bin", 1024 * 1024);
+        put_object(&dist.client(0)?, &bucket, "baseline.bin", baseline.clone()).await?;
+        assert_object_bytes(&proxied_client, &bucket, "baseline.bin", &baseline).await?;
+
+        proxy.set_mode(FaultMode::Blackhole);
+        assert_eq!(proxy.mode(), FaultMode::Blackhole);
+        if let Ok(Ok(_)) = timeout(
+            Duration::from_secs(5),
+            proxied_client.get_object().bucket(&bucket).key("baseline.bin").send(),
+        )
+        .await
+        {
+            return Err("blackholed node endpoint unexpectedly completed a GET".into());
+        }
+
+        let during = payload_for("network/during.bin", 1024 * 1024);
+        timeout(Duration::from_secs(30), async {
+            put_object(&dist.client(1)?, &bucket, "during-blackhole.bin", during.clone()).await?;
+            assert_object_bytes(&dist.client(2)?, &bucket, "baseline.bin", &baseline).await?;
+            assert_object_bytes(&dist.client(0)?, &bucket, "during-blackhole.bin", &during).await?;
+            Ok::<_, Box<dyn std::error::Error + Send + Sync>>(())
+        })
+        .await??;
+
+        proxy.set_mode(FaultMode::Pass);
+        retrying_get_equals(&proxied_client, &bucket, "during-blackhole.bin", &during, Duration::from_secs(30)).await?;
+        Ok(())
+    }
+    .await;
+
+    proxy.set_mode(FaultMode::Pass);
+    proxy.shutdown().await;
+    result
+}
@@ -0,0 +1,98 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{DistCluster, DistLayout, TestResult, assert_object_bytes, payload_for, put_object, unique_bucket};
+use crate::common::init_logging;
+use std::collections::BTreeSet;
+use std::sync::Arc;
+use tokio::sync::Barrier;
+
+#[tokio::test]
+async fn four_node_high_concurrency_mixed_workload_is_consistent_on_every_node() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("conc");
+    dist.create_bucket(&bucket).await?;
+    let clients = Arc::new(dist.clients()?);
+    let worker_count = 24;
+    let rounds = 4;
+    let barrier = Arc::new(Barrier::new(worker_count));
+
+    let mut handles = Vec::new();
+    for idx in 0..worker_count {
+        let clients = clients.clone();
+        let barrier = barrier.clone();
+        let bucket = bucket.clone();
+        handles.push(tokio::spawn(async move {
+            barrier.wait().await;
+            let writer = &clients[idx % clients.len()];
+            let reader = &clients[(idx + 1) % clients.len()];
+            let copier = &clients[(idx + 2) % clients.len()];
+            let mut retained = Vec::with_capacity(rounds);
+            for round in 0..rounds {
+                let key = format!("source/worker-{idx:02}-round-{round}.bin");
+                let copy_key = format!("retained/worker-{idx:02}-round-{round}.bin");
+                let body = payload_for(&key, 64 * 1024);
+                put_object(writer, &bucket, &key, body.clone()).await?;
+
+                let head = reader.head_object().bucket(&bucket).key(&key).send().await?;
+                if head.content_length() != Some(body.len() as i64) {
+                    return Err(format!("HEAD returned the wrong size for {key}: {head:?}").into());
+                }
+                assert_object_bytes(reader, &bucket, &key, &body).await?;
+
+                copier
+                    .copy_object()
+                    .bucket(&bucket)
+                    .key(&copy_key)
+                    .copy_source(format!("{bucket}/{key}"))
+                    .send()
+                    .await?;
+                assert_object_bytes(writer, &bucket, &copy_key, &body).await?;
+
+                writer.delete_object().bucket(&bucket).key(&key).send().await?;
+                let missing = reader
+                    .head_object()
+                    .bucket(&bucket)
+                    .key(&key)
+                    .send()
+                    .await
+                    .expect_err("deleted source key must not remain visible");
+                if missing.raw_response().map(|response| response.status().as_u16()) != Some(404) {
+                    return Err(format!("deleted source {key} returned an unexpected result: {missing:?}").into());
+                }
+                retained.push((copy_key, body));
+            }
+            Ok::<_, Box<dyn std::error::Error + Send + Sync>>(retained)
+        }));
+    }
+
+    let mut inventory = Vec::new();
+    for handle in handles {
+        inventory.extend(handle.await??);
+    }
+
+    let expected_keys: BTreeSet<_> = inventory.iter().map(|(key, _)| key.as_str()).collect();
+    for (node_idx, client) in clients.iter().enumerate() {
+        let listed = client.list_objects_v2().bucket(&bucket).prefix("retained/").send().await?;
+        let listed_keys: BTreeSet<_> = listed.contents().iter().filter_map(|object| object.key()).collect();
+        assert_eq!(listed_keys, expected_keys, "node {node_idx} returned a divergent retained-key listing");
+        for (key, body) in &inventory {
+            assert_object_bytes(client, &bucket, key, body)
+                .await
+                .map_err(|error| format!("node {node_idx} failed to read {key}: {error}"))?;
+        }
+    }
+    Ok(())
+}
@@ -0,0 +1,74 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DECOMMISSION_POOL_ID, DistCluster, DistLayout, TestResult, assert_inventory, decommission_running_with_progress,
+    decommission_status_json, payload_for, put_inventory_retrying, retrying_get_equals, retrying_put, start_decommission,
+    unique_bucket, wait_for_decommission_complete, wait_for_decommission_running_with_progress,
+};
+use crate::common::init_logging;
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::sync::Barrier;
+
+#[tokio::test]
+async fn concurrent_puts_during_decommission_do_not_lose_baseline_or_new_objects() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::SingleNodeFourDrive).await?;
+    let bucket = unique_bucket("concdecom");
+    dist.create_bucket(&bucket).await?;
+    let baseline_client = dist.client(0)?;
+    let inventory = put_inventory_retrying(&baseline_client, &bucket, 96, 256 * 1024, Duration::from_secs(30)).await?;
+    dist.expand_to_four_pools().await?;
+
+    start_decommission(&dist.cluster, DECOMMISSION_POOL_ID).await?;
+
+    let clients = Arc::new(dist.clients()?);
+    let barrier = Arc::new(Barrier::new(17));
+    let mut handles = Vec::new();
+    for idx in 0..16 {
+        let clients = clients.clone();
+        let barrier = barrier.clone();
+        let bucket = bucket.clone();
+        handles.push(tokio::spawn(async move {
+            barrier.wait().await;
+            let client = &clients[idx % clients.len()];
+            let key = format!("live/{idx:02}.bin");
+            let body = payload_for(&key, 8 * 1024);
+            retrying_put(client, &bucket, &key, body.clone(), Duration::from_secs(45)).await?;
+            Ok::<_, Box<dyn std::error::Error + Send + Sync>>((key, body))
+        }));
+    }
+
+    wait_for_decommission_running_with_progress(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(30)).await?;
+    barrier.wait().await;
+
+    let mut live_objects = Vec::new();
+    for handle in handles {
+        live_objects.push(handle.await??);
+    }
+    let status = decommission_status_json(&dist.cluster).await?;
+    if !decommission_running_with_progress(&status, DECOMMISSION_POOL_ID)? {
+        return Err(format!("decommission did not remain active across concurrent PUTs: {status}").into());
+    }
+
+    wait_for_decommission_complete(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(180)).await?;
+
+    let checker = dist.client(2)?;
+    assert_inventory(&checker, &bucket, &inventory).await?;
+    for (key, body) in live_objects {
+        retrying_get_equals(&checker, &bucket, &key, &body, Duration::from_secs(30)).await?;
+    }
+    Ok(())
+}
@@ -0,0 +1,156 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DECOMMISSION_POOL_ID, DistCluster, DistLayout, TestResult, assert_inventory, enable_versioning, put_inventory_retrying,
+    sha256_hex, start_decommission, unique_bucket, wait_for_decommission_active, wait_for_decommission_complete,
+};
+use crate::common::init_logging;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{CompletedMultipartUpload, CompletedPart};
+use std::time::Duration;
+
+#[tokio::test]
+async fn decommission_does_not_alter_object_sha256_across_pools() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::SingleNodeFourDrive).await?;
+    let bucket = unique_bucket("integrity");
+    dist.create_bucket(&bucket).await?;
+    let client = dist.client(0)?;
+    enable_versioning(&client, &bucket).await?;
+    let inventory = put_inventory_retrying(&client, &bucket, 96, 256 * 1024, Duration::from_secs(30)).await?;
+    let before: Vec<(String, String)> = inventory.iter().map(|(key, body)| (key.clone(), sha256_hex(body))).collect();
+
+    let versioned_key = "history/versioned.bin";
+    let version_one = b"historical bytes before data movement".to_vec();
+    let version_two = b"current bytes before data movement".to_vec();
+    let version_one_id = client
+        .put_object()
+        .bucket(&bucket)
+        .key(versioned_key)
+        .body(ByteStream::from(version_one.clone()))
+        .send()
+        .await?
+        .version_id()
+        .ok_or("historical PUT omitted version ID")?
+        .to_string();
+    let version_two_id = client
+        .put_object()
+        .bucket(&bucket)
+        .key(versioned_key)
+        .body(ByteStream::from(version_two.clone()))
+        .send()
+        .await?
+        .version_id()
+        .ok_or("current PUT omitted version ID")?
+        .to_string();
+
+    let multipart_key = "multipart/moved.bin";
+    let first_part = vec![0x31; 5 * 1024 * 1024];
+    let second_part = vec![0x72; 1024 * 1024];
+    let upload = client
+        .create_multipart_upload()
+        .bucket(&bucket)
+        .key(multipart_key)
+        .send()
+        .await?;
+    let upload_id = upload.upload_id().ok_or("movement multipart upload omitted upload ID")?;
+    let uploaded_one = client
+        .upload_part()
+        .bucket(&bucket)
+        .key(multipart_key)
+        .upload_id(upload_id)
+        .part_number(1)
+        .body(ByteStream::from(first_part.clone()))
+        .send()
+        .await?;
+    let uploaded_two = client
+        .upload_part()
+        .bucket(&bucket)
+        .key(multipart_key)
+        .upload_id(upload_id)
+        .part_number(2)
+        .body(ByteStream::from(second_part.clone()))
+        .send()
+        .await?;
+    client
+        .complete_multipart_upload()
+        .bucket(&bucket)
+        .key(multipart_key)
+        .upload_id(upload_id)
+        .multipart_upload(
+            CompletedMultipartUpload::builder()
+                .parts(
+                    CompletedPart::builder()
+                        .part_number(1)
+                        .e_tag(uploaded_one.e_tag().ok_or("movement part 1 omitted ETag")?)
+                        .build(),
+                )
+                .parts(
+                    CompletedPart::builder()
+                        .part_number(2)
+                        .e_tag(uploaded_two.e_tag().ok_or("movement part 2 omitted ETag")?)
+                        .build(),
+                )
+                .build(),
+        )
+        .send()
+        .await?;
+
+    dist.expand_to_four_pools().await?;
+
+    start_decommission(&dist.cluster, DECOMMISSION_POOL_ID).await?;
+    wait_for_decommission_active(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(30)).await?;
+    wait_for_decommission_complete(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(180)).await?;
+
+    let after_client = dist.client(2)?;
+    assert_inventory(&after_client, &bucket, &inventory).await?;
+    for (key, expected_hash) in before {
+        let got = after_client.get_object().bucket(&bucket).key(&key).send().await?;
+        let body = got.body.collect().await?.into_bytes();
+        assert_eq!(sha256_hex(body.as_ref()), expected_hash, "checksum changed for {key} after decommission");
+    }
+    for (version_id, expected) in [(&version_one_id, &version_one), (&version_two_id, &version_two)] {
+        let got = after_client
+            .get_object()
+            .bucket(&bucket)
+            .key(versioned_key)
+            .version_id(version_id)
+            .send()
+            .await?
+            .body
+            .collect()
+            .await?
+            .into_bytes();
+        assert_eq!(got.as_ref(), expected.as_slice(), "version {version_id} changed after decommission");
+    }
+    let mut expected_multipart = first_part;
+    expected_multipart.extend_from_slice(&second_part);
+    let got_multipart = after_client
+        .get_object()
+        .bucket(&bucket)
+        .key(multipart_key)
+        .send()
+        .await?
+        .body
+        .collect()
+        .await?
+        .into_bytes();
+    assert_eq!(
+        sha256_hex(got_multipart.as_ref()),
+        sha256_hex(&expected_multipart),
+        "multipart checksum changed after decommission"
+    );
+    Ok(())
+}
@@ -0,0 +1,81 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DECOMMISSION_POOL_ID, DistCluster, DistLayout, TestResult, assert_inventory, list_pools_json, put_inventory,
+    put_inventory_retrying, start_decommission, start_rebalance, unique_bucket, wait_for_decommission_active,
+    wait_for_decommission_complete, wait_for_rebalance_active, wait_for_rebalance_complete,
+};
+use crate::common::init_logging;
+use std::time::Duration;
+
+#[tokio::test]
+async fn four_node_pool_expand_preserves_objects_then_rebalance() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::SingleNodeFourDrive).await?;
+    let bucket = unique_bucket("expand");
+    dist.create_bucket(&bucket).await?;
+    let client = dist.client(0)?;
+    let inventory = put_inventory(&client, &bucket, 64, 256 * 1024).await?;
+    assert_inventory(&client, &bucket, &inventory).await?;
+
+    for expected_nodes in 2..=4 {
+        let new_node = dist.append_pool_and_restart().await?;
+        assert_eq!(new_node + 1, expected_nodes);
+        assert_inventory(&dist.client(new_node)?, &bucket, &inventory).await?;
+    }
+    assert_eq!(dist.cluster.nodes.len(), 4);
+
+    // Prove that the expanded pool map is durable, and clear any recovery
+    // latch raised while the newly-added pool replicas converged.
+    dist.restart_current_binary_gracefully().await?;
+
+    let after_expand = dist.client(0)?;
+    assert_inventory(&after_expand, &bucket, &inventory).await?;
+    let peer = dist.client(3)?;
+    assert_inventory(&peer, &bucket, &inventory).await?;
+
+    let rebalance_id = start_rebalance(&dist.cluster).await?;
+    wait_for_rebalance_active(&dist.cluster, &rebalance_id, Duration::from_secs(30)).await?;
+    wait_for_rebalance_complete(&dist.cluster, &rebalance_id, Duration::from_secs(180)).await?;
+    assert_inventory(&peer, &bucket, &inventory).await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_pool_decommission_moves_objects_without_loss() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::SingleNodeFourDrive).await?;
+    let bucket = unique_bucket("decom");
+    dist.create_bucket(&bucket).await?;
+    let client = dist.client(0)?;
+    let inventory = put_inventory_retrying(&client, &bucket, 96, 128 * 1024, Duration::from_secs(30)).await?;
+    dist.expand_to_four_pools().await?;
+
+    let pools_before = list_pools_json(&dist.cluster).await?;
+    let pool_count = pools_before
+        .as_array()
+        .map(Vec::len)
+        .or_else(|| pools_before.get("pools").and_then(serde_json::Value::as_array).map(Vec::len))
+        .ok_or_else(|| format!("pool list omitted an array: {pools_before}"))?;
+    assert_eq!(pool_count, 4, "expected exactly four pools before decommission: {pools_before}");
+
+    start_decommission(&dist.cluster, DECOMMISSION_POOL_ID).await?;
+    wait_for_decommission_active(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(30)).await?;
+    wait_for_decommission_complete(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(180)).await?;
+
+    let after = dist.client(2)?;
+    assert_inventory(&after, &bucket, &inventory).await?;
+    Ok(())
+}
@@ -0,0 +1,149 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DistCluster, DistLayout, TestResult, assert_object_bytes, get_object_bytes, put_object, unique_bucket, wait_until,
+};
+use crate::common::init_logging;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{CompletedMultipartUpload, CompletedPart};
+use std::time::Duration;
+
+#[tokio::test]
+async fn four_node_four_drive_multipart_and_cross_node_listing_agree() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("extra");
+    dist.create_bucket(&bucket).await?;
+    let client = dist.client(0)?;
+
+    let key = "multipart.bin";
+    let part1 = vec![0x41u8; 5 * 1024 * 1024];
+    let part2 = vec![0x42u8; 5 * 1024 * 1024];
+    let upload = client.create_multipart_upload().bucket(&bucket).key(key).send().await?;
+    let upload_id = upload.upload_id().ok_or("missing upload id")?.to_string();
+
+    let uploaded1 = client
+        .upload_part()
+        .bucket(&bucket)
+        .key(key)
+        .upload_id(&upload_id)
+        .part_number(1)
+        .body(ByteStream::from(part1.clone()))
+        .send()
+        .await?;
+    let uploaded2 = client
+        .upload_part()
+        .bucket(&bucket)
+        .key(key)
+        .upload_id(&upload_id)
+        .part_number(2)
+        .body(ByteStream::from(part2.clone()))
+        .send()
+        .await?;
+
+    client
+        .complete_multipart_upload()
+        .bucket(&bucket)
+        .key(key)
+        .upload_id(&upload_id)
+        .multipart_upload(
+            CompletedMultipartUpload::builder()
+                .parts(
+                    CompletedPart::builder()
+                        .part_number(1)
+                        .e_tag(uploaded1.e_tag().unwrap_or_default())
+                        .build(),
+                )
+                .parts(
+                    CompletedPart::builder()
+                        .part_number(2)
+                        .e_tag(uploaded2.e_tag().unwrap_or_default())
+                        .build(),
+                )
+                .build(),
+        )
+        .send()
+        .await?;
+
+    let mut expected = part1;
+    expected.extend_from_slice(&part2);
+    for node_idx in 0..dist.cluster.nodes.len() {
+        assert_object_bytes(&dist.client(node_idx)?, &bucket, key, &expected).await?;
+    }
+
+    put_object(&client, &bucket, "list/a", b"a".to_vec()).await?;
+    put_object(&dist.client(2)?, &bucket, "list/b", b"b".to_vec()).await?;
+    let mut seen = Vec::new();
+    for node_idx in 0..dist.cluster.nodes.len() {
+        let listed = dist
+            .client(node_idx)?
+            .list_objects_v2()
+            .bucket(&bucket)
+            .prefix("list/")
+            .send()
+            .await?;
+        let keys: Vec<String> = listed
+            .contents()
+            .iter()
+            .filter_map(|object| object.key().map(str::to_string))
+            .collect();
+        seen.push(keys);
+    }
+    for keys in &seen[1..] {
+        assert_eq!(&seen[0], keys, "list results diverged across nodes: {seen:?}");
+    }
+
+    let got = get_object_bytes(&dist.client(3)?, &bucket, "list/a").await?;
+    assert_eq!(got, b"a");
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_list_buckets_agree_across_all_nodes() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("listed");
+    dist.create_bucket(&bucket).await?;
+    put_object(&dist.client(0)?, &bucket, "seed.bin", b"seed".to_vec()).await?;
+
+    for node_idx in 0..dist.cluster.nodes.len() {
+        let client = dist.client(node_idx)?;
+        let name = bucket.clone();
+        wait_until(
+            Duration::from_secs(20),
+            || {
+                let client = client.clone();
+                let name = name.clone();
+                async move {
+                    let listed = client.list_buckets().send().await?;
+                    Ok(listed.buckets().iter().any(|entry| entry.name() == Some(name.as_str())))
+                }
+            },
+            &format!("node {node_idx} lists {bucket}"),
+        )
+        .await?;
+        wait_until(
+            Duration::from_secs(20),
+            || {
+                let client = dist.client(node_idx).expect("client");
+                let name = bucket.clone();
+                async move { Ok(get_object_bytes(&client, &name, "seed.bin").await.ok() == Some(b"seed".to_vec())) }
+            },
+            &format!("node {node_idx} reads seed.bin"),
+        )
+        .await?;
+    }
+    Ok(())
+}
@@ -0,0 +1,35 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! 4-node 4-drive distributed e2e coverage.
+//!
+//! Selected by `[profile.e2e-distributed]` and run from
+//! `.github/workflows/e2e-distributed.yml`. Excluded from `e2e-full` because
+//! each case starts four real `rustfs` processes.
+
+mod chaos_test;
+mod concurrency_stability_test;
+mod concurrent_data_movement_test;
+mod data_integrity_movement_test;
+mod expand_decommission_rebalance_test;
+mod extra_test;
+mod harness;
+mod object_lock_test;
+mod observability_test;
+mod replication_quota_test;
+mod s3_basic_test;
+mod s3_during_data_movement_test;
+mod site_replication_test;
+mod upgrade_test;
+mod versioning_test;
@@ -0,0 +1,219 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{DistCluster, DistLayout, TestResult, unique_bucket};
+use crate::common::init_logging;
+use crate::object_lock::common::{
+    delete_object_with_bypass, put_object_lock_configuration, put_object_with_legal_hold, put_object_with_retention,
+};
+use aws_sdk_s3::Client;
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use aws_sdk_s3::error::SdkError;
+use aws_sdk_s3::operation::delete_object::DeleteObjectError;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{
+    DefaultRetention, ObjectLockConfiguration, ObjectLockEnabled, ObjectLockLegalHoldStatus, ObjectLockRetentionMode,
+    ObjectLockRule,
+};
+use chrono::{Duration as ChronoDuration, Utc};
+
+fn delete_denied(error: &SdkError<DeleteObjectError>, context: &str) -> TestResult {
+    let code = error.as_service_error().and_then(ProvideErrorMetadata::code);
+    if code == Some("AccessDenied") {
+        Ok(())
+    } else {
+        Err(format!("{context}: expected AccessDenied, got {error:?}").into())
+    }
+}
+
+async fn expect_versioned_delete_denied(
+    client: &Client,
+    bucket: &str,
+    key: &str,
+    version_id: &str,
+    bypass: bool,
+    context: &str,
+) -> TestResult {
+    match delete_object_with_bypass(client, bucket, key, Some(version_id), bypass).await {
+        Ok(_) => Err(format!("{context}: DeleteObject of retained version must be denied").into()),
+        Err(error) => delete_denied(error.as_ref(), context),
+    }
+}
+
+#[tokio::test]
+async fn four_node_four_drive_object_lock_worm_blocks_delete() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let client = dist.client(0)?;
+    let peer = dist.client(2)?;
+    let bucket = unique_bucket("objlock");
+
+    client
+        .create_bucket()
+        .bucket(&bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+
+    let retain_until = Utc::now() + ChronoDuration::days(1);
+
+    let compliance_key = "compliance.bin";
+    let compliance_version = put_object_with_retention(
+        &client,
+        &bucket,
+        compliance_key,
+        b"locked-compliance",
+        ObjectLockRetentionMode::Compliance,
+        retain_until,
+    )
+    .await?;
+
+    // Unversioned DELETE is allowed: it only creates a delete marker. WORM
+    // applies to a specific version id.
+    let marker = peer.delete_object().bucket(&bucket).key(compliance_key).send().await?;
+    assert_eq!(
+        marker.delete_marker(),
+        Some(true),
+        "unversioned DELETE on a locked object must create a delete marker"
+    );
+
+    expect_versioned_delete_denied(&peer, &bucket, compliance_key, &compliance_version, false, "COMPLIANCE without bypass")
+        .await?;
+    expect_versioned_delete_denied(&peer, &bucket, compliance_key, &compliance_version, true, "COMPLIANCE with bypass").await?;
+
+    let governance_key = "governance.bin";
+    let governance_version = put_object_with_retention(
+        &client,
+        &bucket,
+        governance_key,
+        b"locked-governance",
+        ObjectLockRetentionMode::Governance,
+        retain_until,
+    )
+    .await?;
+
+    expect_versioned_delete_denied(&peer, &bucket, governance_key, &governance_version, false, "GOVERNANCE without bypass")
+        .await?;
+    delete_object_with_bypass(&peer, &bucket, governance_key, Some(&governance_version), true).await?;
+    let deleted_governance = peer
+        .head_object()
+        .bucket(&bucket)
+        .key(governance_key)
+        .version_id(&governance_version)
+        .send()
+        .await
+        .expect_err("GOVERNANCE bypass must remove the retained version");
+    assert_eq!(
+        deleted_governance.raw_response().map(|response| response.status().as_u16()),
+        Some(404),
+        "deleted GOVERNANCE version returned an unexpected HEAD result: {deleted_governance:?}"
+    );
+
+    let hold_key = "legal-hold.bin";
+    let hold_version =
+        put_object_with_legal_hold(&client, &bucket, hold_key, b"legal-hold", ObjectLockLegalHoldStatus::On).await?;
+    expect_versioned_delete_denied(&peer, &bucket, hold_key, &hold_version, false, "legal hold without bypass").await?;
+    expect_versioned_delete_denied(&peer, &bucket, hold_key, &hold_version, true, "legal hold with bypass").await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_default_retention_is_visible_and_non_lock_bucket_rejects_configuration() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let writer = dist.client(0)?;
+    let reader = dist.client(3)?;
+    let bucket = unique_bucket("default-lock");
+
+    writer
+        .create_bucket()
+        .bucket(&bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+    put_object_lock_configuration(&writer, &bucket, ObjectLockRetentionMode::Governance, Some(1), None).await?;
+
+    let key = "default-governance.bin";
+    let put = writer
+        .put_object()
+        .bucket(&bucket)
+        .key(key)
+        .body(ByteStream::from_static(b"default retention payload"))
+        .send()
+        .await?;
+    let version_id = put.version_id().ok_or("default-retained PUT omitted version ID")?;
+
+    let config = reader.get_object_lock_configuration().bucket(&bucket).send().await?;
+    let default_retention = config
+        .object_lock_configuration()
+        .and_then(|configuration| configuration.rule())
+        .and_then(|rule| rule.default_retention())
+        .ok_or("GetObjectLockConfiguration omitted default retention")?;
+    assert_eq!(default_retention.mode().map(|mode| mode.as_str()), Some("GOVERNANCE"));
+    assert_eq!(default_retention.days(), Some(1));
+
+    let retention = reader
+        .get_object_retention()
+        .bucket(&bucket)
+        .key(key)
+        .version_id(version_id)
+        .send()
+        .await?;
+    let retention = retention.retention().ok_or("GetObjectRetention omitted applied retention")?;
+    assert_eq!(retention.mode().map(|mode| mode.as_str()), Some("GOVERNANCE"));
+    let retain_until = retention
+        .retain_until_date()
+        .ok_or("default retention omitted retain-until date")?;
+    assert!(retain_until.secs() > Utc::now().timestamp(), "default retention is not in the future");
+
+    let versioning = reader.get_bucket_versioning().bucket(&bucket).send().await?;
+    assert_eq!(versioning.status().map(|status| status.as_str()), Some("Enabled"));
+    expect_versioned_delete_denied(&reader, &bucket, key, version_id, false, "default GOVERNANCE retention without bypass")
+        .await?;
+
+    let plain_bucket = unique_bucket("no-lock");
+    dist.create_bucket(&plain_bucket).await?;
+    let configuration = ObjectLockConfiguration::builder()
+        .object_lock_enabled(ObjectLockEnabled::Enabled)
+        .rule(
+            ObjectLockRule::builder()
+                .default_retention(
+                    DefaultRetention::builder()
+                        .mode(ObjectLockRetentionMode::Governance)
+                        .days(1)
+                        .build(),
+                )
+                .build(),
+        )
+        .build();
+    let error = writer
+        .put_object_lock_configuration()
+        .bucket(&plain_bucket)
+        .object_lock_configuration(configuration)
+        .send()
+        .await
+        .expect_err("an unversioned bucket must reject Object Lock enablement");
+    let service_error = error
+        .as_service_error()
+        .ok_or("non-lock bucket rejection was not an S3 service error")?;
+    assert_eq!(service_error.code(), Some("InvalidBucketState"), "unexpected error: {error:?}");
+    assert_eq!(
+        service_error.message(),
+        Some("Object Lock configuration cannot be enabled on existing buckets"),
+        "unexpected error: {error:?}"
+    );
+
+    Ok(())
+}
@@ -0,0 +1,236 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{DistCluster, DistLayout, TestResult, cluster_admin_ok, unique_bucket, wait_for_ready};
+use crate::common::{admin_request, init_logging, local_http_client};
+use aws_sdk_s3::operation::RequestId;
+use aws_sdk_s3::primitives::ByteStream;
+use bytes::Bytes;
+use http::Method;
+use http_body_util::{BodyExt, Empty};
+use hyper::body::Incoming;
+use hyper::service::service_fn;
+use hyper::{Request, Response};
+use hyper_util::rt::TokioIo;
+use local_ip_address::local_ip;
+use rustfs_madmin::metrics::RealtimeMetrics;
+use rustfs_utils::egress::ENV_OUTBOUND_ALLOW_ORIGINS;
+use serde_json::Value;
+use std::convert::Infallible;
+use std::time::Duration;
+use tokio::net::TcpListener;
+use tokio::sync::mpsc;
+use tokio::task::JoinHandle;
+use tokio::time::{Instant, timeout};
+
+async fn spawn_audit_collector() -> TestResult<(String, mpsc::UnboundedReceiver<Value>, JoinHandle<()>)> {
+    let listener = TcpListener::bind("0.0.0.0:0").await?;
+    let endpoint = format!("http://{}/audit", std::net::SocketAddr::new(local_ip()?, listener.local_addr()?.port()));
+    let (tx, rx) = mpsc::unbounded_channel();
+    let handle = tokio::spawn(async move {
+        loop {
+            let Ok((stream, _)) = listener.accept().await else {
+                return;
+            };
+            let tx = tx.clone();
+            tokio::spawn(async move {
+                let service = service_fn(move |request: Request<Incoming>| {
+                    let tx = tx.clone();
+                    async move {
+                        let method = request.method().clone();
+                        if let Ok(body) = request.into_body().collect().await
+                            && method == Method::POST
+                            && let Ok(payload) = serde_json::from_slice::<Value>(&body.to_bytes())
+                        {
+                            if let Some(records) = payload["Records"].as_array() {
+                                for entry in records {
+                                    let _ = tx.send(entry.clone());
+                                }
+                            } else {
+                                let _ = tx.send(payload);
+                            }
+                        }
+                        Ok::<_, Infallible>(Response::new(Empty::<Bytes>::new()))
+                    }
+                });
+                let _ = hyper::server::conn::http1::Builder::new()
+                    .serve_connection(TokioIo::new(stream), service)
+                    .await;
+            });
+        }
+    });
+    Ok((endpoint, rx, handle))
+}
+
+async fn wait_for_audit_entry(
+    rx: &mut mpsc::UnboundedReceiver<Value>,
+    bucket: &str,
+    key: &str,
+    request_id: &str,
+) -> TestResult<Value> {
+    let deadline = Instant::now() + Duration::from_secs(30);
+    let mut seen = Vec::new();
+    loop {
+        let remaining = deadline.saturating_duration_since(Instant::now());
+        if remaining.is_zero() {
+            return Err(format!(
+                "audit webhook did not receive PutObject for {bucket}/{key}; received {} other records: {seen:?}",
+                seen.len()
+            )
+            .into());
+        }
+        let entry = match timeout(remaining, rx.recv()).await {
+            Ok(Some(entry)) => entry,
+            Ok(None) => return Err("audit collector stopped before the expected entry arrived".into()),
+            Err(_) => {
+                return Err(format!(
+                    "audit webhook did not receive PutObject for {bucket}/{key}; received {} other records: {seen:?}",
+                    seen.len()
+                )
+                .into());
+            }
+        };
+        if entry["api"]["name"].as_str() == Some("s3:PutObject")
+            && entry["api"]["bucket"].as_str() == Some(bucket)
+            && entry["api"]["object"].as_str() == Some(key)
+            && entry["requestID"].as_str() == Some(request_id)
+        {
+            return Ok(entry);
+        }
+        if seen.len() < 8 {
+            seen.push(format!(
+                "api={:?} bucket={:?} object={:?} requestID={:?}",
+                entry["api"]["name"].as_str(),
+                entry["api"]["bucket"].as_str(),
+                entry["api"]["object"].as_str(),
+                entry["requestID"].as_str()
+            ));
+        }
+    }
+}
+
+#[tokio::test]
+async fn four_node_health_inventory_metrics_and_audit_delivery_are_consistent() -> TestResult {
+    init_logging();
+    let (audit_endpoint, mut audit_entries, collector) = spawn_audit_collector().await?;
+    let audit_origin = reqwest::Url::parse(&audit_endpoint)?.origin().ascii_serialization();
+    let audit_env = [
+        ("RUSTFS_AUDIT_ENABLE", "true"),
+        ("RUSTFS_AUDIT_WEBHOOK_ENABLE_DISTRIBUTED", "on"),
+        ("RUSTFS_AUDIT_WEBHOOK_ENDPOINT_DISTRIBUTED", audit_endpoint.as_str()),
+        (ENV_OUTBOUND_ALLOW_ORIGINS, audit_origin.as_str()),
+    ];
+    let mut dist = DistCluster::new_stopped_with_env(DistLayout::FourByFour, &audit_env).await?;
+    for node_idx in 0..dist.cluster.nodes.len() {
+        let queue_dir = format!("{}/audit-queue-node-{node_idx}", dist.cluster.temp_dir);
+        tokio::fs::create_dir_all(&queue_dir).await?;
+        dist.cluster
+            .set_node_env(node_idx, "RUSTFS_AUDIT_WEBHOOK_QUEUE_DIR_DISTRIBUTED", queue_dir)?;
+    }
+    dist.cluster.start().await?;
+    wait_for_ready(&dist.cluster).await?;
+
+    let http = local_http_client();
+    for node in &dist.cluster.nodes {
+        for probe in ["ready", "live"] {
+            let response = http.get(format!("{}/health/{probe}", node.url)).send().await?;
+            assert!(
+                response.status().is_success(),
+                "node {} {probe} probe failed: {}",
+                node.address,
+                response.status()
+            );
+        }
+    }
+
+    let info_body = cluster_admin_ok(&dist.cluster, Method::GET, "/rustfs/admin/v3/info", None).await?;
+    let info: Value = serde_json::from_str(&info_body)?;
+    let servers = info["info"]["servers"]
+        .as_array()
+        .ok_or_else(|| format!("admin info omitted servers: {info}"))?;
+    assert_eq!(servers.len(), 4, "admin info did not report all four nodes: {info}");
+
+    let storage_body = cluster_admin_ok(&dist.cluster, Method::GET, "/rustfs/admin/v3/storageinfo", None).await?;
+    let storage: Value = serde_json::from_str(&storage_body)?;
+    let disks = storage["info"]["disks"]
+        .as_array()
+        .ok_or_else(|| format!("storageinfo omitted disks: {storage}"))?;
+    assert_eq!(disks.len(), 16, "storageinfo did not report all sixteen drives: {storage}");
+    assert!(
+        disks.iter().all(|disk| {
+            disk["state"].as_str().is_some_and(|state| state.eq_ignore_ascii_case("ok"))
+                && disk["runtimeState"]
+                    .as_str()
+                    .is_some_and(|state| state.eq_ignore_ascii_case("online"))
+        }),
+        "storageinfo reported a drive that was not healthy and online: {storage}"
+    );
+
+    for (node_idx, node) in dist.cluster.nodes.iter().enumerate() {
+        let (status, metrics_body) = admin_request(
+            &node.url,
+            Method::GET,
+            "/rustfs/admin/v3/metrics?n=1&by-host=true&by-disk=true",
+            None,
+            &dist.cluster.access_key,
+            &dist.cluster.secret_key,
+        )
+        .await?;
+        assert!(status.is_success(), "node {node_idx} metrics failed: {status} {metrics_body}");
+        let sample: RealtimeMetrics = serde_json::from_str(
+            metrics_body
+                .lines()
+                .next()
+                .ok_or_else(|| format!("node {node_idx} returned empty metrics"))?,
+        )?;
+        assert!(sample.finally, "node {node_idx} metrics sample was not terminal");
+        assert!(sample.errors.is_empty(), "node {node_idx} metrics reported errors: {:?}", sample.errors);
+        assert!(!sample.hosts.is_empty(), "node {node_idx} metrics omitted hosts");
+    }
+
+    let targets_body = cluster_admin_ok(&dist.cluster, Method::GET, "/rustfs/admin/v3/audit/target/list", None).await?;
+    let targets: Value = serde_json::from_str(&targets_body)?;
+    let configured = targets["audit_endpoints"]
+        .as_array()
+        .ok_or_else(|| format!("audit target list omitted audit_endpoints: {targets}"))?
+        .iter()
+        .any(|target| target["account_id"].as_str() == Some("distributed") && target["service"].as_str() == Some("webhook"));
+    assert!(configured, "configured audit webhook was missing: {targets}");
+
+    let bucket = unique_bucket("audit");
+    dist.create_bucket(&bucket).await?;
+    let key = "correlated/audit-object.bin";
+    let put = dist
+        .client(2)?
+        .put_object()
+        .bucket(&bucket)
+        .key(key)
+        .body(ByteStream::from_static(b"distributed audit payload"))
+        .send()
+        .await?;
+    let request_id = put.request_id().ok_or("PutObject response omitted request ID")?;
+    let audit = wait_for_audit_entry(&mut audit_entries, &bucket, key, request_id).await?;
+    assert_eq!(
+        audit["api"]["status_code"].as_i64(),
+        Some(200),
+        "audit entry did not report success: {audit}"
+    );
+    assert!(
+        !audit.to_string().contains(&dist.cluster.secret_key),
+        "audit entry leaked the root secret key"
+    );
+
+    collector.abort();
+    Ok(())
+}
@@ -0,0 +1,191 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DistCluster, DistLayout, TestResult, enable_versioning, put_bucket_replication, put_object, retrying_put, set_bucket_quota,
+    set_remote_target, unique_bucket, wait_for_ready, wait_for_replicated_bytes, wait_until,
+};
+use crate::common::{FAST_DATA_USAGE_SCANNER_ENV, init_logging};
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use aws_sdk_s3::primitives::ByteStream;
+use http::Method;
+use std::time::Duration;
+
+async fn wait_for_replication_status(
+    client: &aws_sdk_s3::Client,
+    bucket: &str,
+    key: &str,
+    expected: &[&str],
+    timeout: Duration,
+) -> TestResult {
+    wait_until(
+        timeout,
+        || async {
+            let head = client.head_object().bucket(bucket).key(key).send().await?;
+            Ok(head
+                .replication_status()
+                .is_some_and(|status| expected.contains(&status.as_str())))
+        },
+        &format!("replication status for {bucket}/{key} in {expected:?}"),
+    )
+    .await
+}
+
+#[tokio::test]
+async fn four_node_bucket_replication_converges_to_peer_cluster() -> TestResult {
+    init_logging();
+    let (source, mut target) = DistCluster::start_replication_pair().await?;
+    let source_bucket = unique_bucket("replsrc");
+    let target_bucket = unique_bucket("repldst");
+    source.create_bucket(&source_bucket).await?;
+    target.create_bucket(&target_bucket).await?;
+
+    let source_client = source.client(0)?;
+    let target_client = target.client(0)?;
+    enable_versioning(&source_client, &source_bucket).await?;
+    enable_versioning(&target_client, &target_bucket).await?;
+
+    let arn = set_remote_target(&source.cluster, &source_bucket, &target.cluster, &target_bucket).await?;
+    put_bucket_replication(&source.cluster, &source_bucket, &arn).await?;
+
+    let key = "replicated/metadata-and-tags.bin";
+    let body = b"distributed-bucket-replication".to_vec();
+    source_client
+        .put_object()
+        .bucket(&source_bucket)
+        .key(key)
+        .metadata("origin", "four-node-source")
+        .tagging("suite=distributed&shape=metadata")
+        .body(ByteStream::from(body.clone()))
+        .send()
+        .await?;
+    wait_for_replicated_bytes(&target_client, &target_bucket, key, &body, Duration::from_secs(45)).await?;
+    wait_for_replication_status(&source_client, &source_bucket, key, &["COMPLETED"], Duration::from_secs(30)).await?;
+
+    let peer_read = target.client(3)?;
+    wait_for_replicated_bytes(&peer_read, &target_bucket, key, &body, Duration::from_secs(15)).await?;
+    let replica_head = peer_read.head_object().bucket(&target_bucket).key(key).send().await?;
+    assert_eq!(
+        replica_head
+            .metadata()
+            .and_then(|metadata| metadata.get("origin"))
+            .map(String::as_str),
+        Some("four-node-source")
+    );
+    assert_eq!(replica_head.replication_status().map(|status| status.as_str()), Some("REPLICA"));
+    let replica_tags = peer_read.get_object_tagging().bucket(&target_bucket).key(key).send().await?;
+    let tags: std::collections::BTreeMap<_, _> = replica_tags.tag_set().iter().map(|tag| (tag.key(), tag.value())).collect();
+    assert_eq!(tags.get("suite"), Some(&"distributed"));
+    assert_eq!(tags.get("shape"), Some(&"metadata"));
+
+    target.cluster.stop();
+    let outage_key = "replicated/queued-during-target-outage.bin";
+    let outage_body = b"retry-after-target-restart".to_vec();
+    put_object(&source_client, &source_bucket, outage_key, outage_body.clone()).await?;
+    wait_for_replication_status(
+        &source_client,
+        &source_bucket,
+        outage_key,
+        &["PENDING", "FAILED"],
+        Duration::from_secs(30),
+    )
+    .await?;
+
+    target.cluster.start().await?;
+    wait_for_ready(&target.cluster).await?;
+    wait_for_replicated_bytes(&target.client(2)?, &target_bucket, outage_key, &outage_body, Duration::from_secs(90)).await?;
+    wait_for_replication_status(&source_client, &source_bucket, outage_key, &["COMPLETED"], Duration::from_secs(45)).await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_four_drive_hard_quota_rejects_over_limit_put() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start_with_env(DistLayout::FourByFour, FAST_DATA_USAGE_SCANNER_ENV).await?;
+    let bucket = unique_bucket("quota");
+    dist.create_bucket(&bucket).await?;
+    set_bucket_quota(&dist.cluster, &bucket, 8 * 1024).await?;
+
+    let client = dist.client(1)?;
+    retrying_put(&client, &bucket, "small.bin", vec![0u8; 1024], Duration::from_secs(30)).await?;
+    wait_until(
+        Duration::from_secs(30),
+        || async {
+            let (status, body) = super::harness::cluster_admin(
+                &dist.cluster,
+                Method::GET,
+                &format!("/rustfs/admin/v3/quota-stats/{bucket}"),
+                None,
+            )
+            .await?;
+            if !status.is_success() {
+                return Ok(false);
+            }
+            let stats: serde_json::Value =
+                serde_json::from_str(&body).map_err(|error| format!("quota stats returned invalid JSON: {error}: {body}"))?;
+            let usage = stats
+                .get("current_usage")
+                .and_then(serde_json::Value::as_u64)
+                .ok_or_else(|| format!("quota stats omitted current_usage: {stats}"))?;
+            Ok(usage >= 1024)
+        },
+        "quota stats observe small object",
+    )
+    .await?;
+
+    let oversized_key = "too-big.bin";
+    let error = client
+        .put_object()
+        .bucket(&bucket)
+        .key(oversized_key)
+        .body(vec![0u8; 16 * 1024].into())
+        .send()
+        .await
+        .expect_err("hard quota must reject the oversized PUT");
+    let service_error = error
+        .as_service_error()
+        .ok_or("quota rejection was not an S3 service error")?;
+    assert_eq!(
+        error.raw_response().map(|response| response.status().as_u16()),
+        Some(400),
+        "quota rejection must be HTTP 400: {error:?}"
+    );
+    assert_eq!(service_error.code(), Some("InvalidRequest"), "unexpected quota error: {error:?}");
+    assert!(
+        service_error
+            .message()
+            .is_some_and(|message| message.starts_with("Bucket quota exceeded")),
+        "PUT must fail specifically at quota admission: {error:?}"
+    );
+
+    let missing = client
+        .head_object()
+        .bucket(&bucket)
+        .key(oversized_key)
+        .send()
+        .await
+        .expect_err("an object rejected by quota must not become visible");
+    assert_eq!(
+        missing.raw_response().map(|response| response.status().as_u16()),
+        Some(404),
+        "quota-rejected object returned an unexpected HEAD result: {missing:?}"
+    );
+
+    let listed = client.list_objects_v2().bucket(&bucket).send().await?;
+    assert!(
+        listed.contents().iter().all(|object| object.key() != Some(oversized_key)),
+        "quota-rejected key leaked into ListObjectsV2"
+    );
+    Ok(())
+}
@@ -0,0 +1,258 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{DistCluster, DistLayout, TestResult, assert_object_bytes, get_object_bytes, put_object, unique_bucket};
+use crate::common::{init_logging, local_http_client};
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use aws_sdk_s3::presigning::PresigningConfig;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{Delete, MetadataDirective, ObjectIdentifier};
+use std::time::Duration;
+
+#[tokio::test]
+async fn four_node_four_drive_s3_put_get_head_list_copy_rename_delete_and_presign() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("s3basic");
+    dist.create_bucket(&bucket).await?;
+
+    let writer = dist.client(0)?;
+    let reader = dist.client(3)?;
+    let key = "dir/object.bin";
+    let body = vec![0xA5u8; 256 * 1024];
+    put_object(&writer, &bucket, key, body.clone()).await?;
+
+    let head = reader.head_object().bucket(&bucket).key(key).send().await?;
+    assert_eq!(head.content_length(), Some(body.len() as i64));
+    assert_object_bytes(&reader, &bucket, key, &body).await?;
+
+    let ranged = reader
+        .get_object()
+        .bucket(&bucket)
+        .key(key)
+        .range("bytes=0-15")
+        .send()
+        .await?;
+    let ranged_body = ranged.body.collect().await?.into_bytes();
+    assert_eq!(ranged_body.as_ref(), &body[..16]);
+
+    let listed = reader.list_objects_v2().bucket(&bucket).prefix("dir/").send().await?;
+    let keys: Vec<_> = listed.contents().iter().filter_map(|object| object.key()).collect();
+    assert_eq!(keys, vec![key]);
+
+    let copy_key = "dir/object-copy.bin";
+    reader
+        .copy_object()
+        .bucket(&bucket)
+        .key(copy_key)
+        .copy_source(format!("{bucket}/{key}"))
+        .metadata_directive(MetadataDirective::Copy)
+        .send()
+        .await?;
+    assert_object_bytes(&writer, &bucket, copy_key, &body).await?;
+
+    let moved_key = "dir/object-moved.bin";
+    writer
+        .copy_object()
+        .bucket(&bucket)
+        .key(moved_key)
+        .copy_source(format!("{bucket}/{copy_key}"))
+        .send()
+        .await?;
+    writer.delete_object().bucket(&bucket).key(copy_key).send().await?;
+    match writer.head_object().bucket(&bucket).key(copy_key).send().await {
+        Ok(_) => return Err("copied source still present after rename delete".into()),
+        Err(error) if error.as_service_error().is_some_and(|err| err.is_not_found()) => {}
+        Err(error) => return Err(error.into()),
+    }
+    assert_object_bytes(&reader, &bucket, moved_key, &body).await?;
+
+    let presigned = writer
+        .get_object()
+        .bucket(&bucket)
+        .key(key)
+        .presigned(PresigningConfig::expires_in(Duration::from_secs(120))?)
+        .await?;
+    let response = local_http_client().get(presigned.uri().to_string()).send().await?;
+    assert!(response.status().is_success(), "presigned GET failed: {}", response.status());
+    let presigned_body = response.bytes().await?;
+    assert_eq!(presigned_body.as_ref(), body.as_slice());
+
+    let empty_key = "empty";
+    put_object(&writer, &bucket, empty_key, Vec::new()).await?;
+    let empty = get_object_bytes(&reader, &bucket, empty_key).await?;
+    assert!(empty.is_empty());
+
+    let deleted = writer
+        .delete_objects()
+        .bucket(&bucket)
+        .delete(
+            Delete::builder()
+                .objects(ObjectIdentifier::builder().key(key).build()?)
+                .objects(ObjectIdentifier::builder().key(moved_key).build()?)
+                .objects(ObjectIdentifier::builder().key(empty_key).build()?)
+                .build()?,
+        )
+        .send()
+        .await?;
+    assert!(deleted.errors().is_empty(), "DeleteObjects reported failures: {deleted:?}");
+    assert_eq!(deleted.deleted().len(), 3, "DeleteObjects did not acknowledge every key");
+
+    let remaining = reader.list_objects_v2().bucket(&bucket).send().await?;
+    assert!(remaining.contents().is_empty(), "bucket still has objects after delete");
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_s3_metadata_tags_special_keys_pagination_and_multipart_abort() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("s3matrix");
+    dist.create_bucket(&bucket).await?;
+    let writer = dist.client(0)?;
+    let reader = dist.client(3)?;
+
+    let special_key = "unicode/测试 space+percent%25.txt";
+    let special_body = b"metadata and tagging survive distributed routing".to_vec();
+    let put = writer
+        .put_object()
+        .bucket(&bucket)
+        .key(special_key)
+        .metadata("test-meta", "distributed")
+        .tagging("purpose=compatibility&scope=four-by-four")
+        .body(ByteStream::from(special_body.clone()))
+        .send()
+        .await?;
+    let etag = put.e_tag().ok_or("PutObject omitted ETag")?.to_string();
+
+    let head = reader.head_object().bucket(&bucket).key(special_key).send().await?;
+    assert_eq!(
+        head.metadata()
+            .and_then(|metadata| metadata.get("test-meta"))
+            .map(String::as_str),
+        Some("distributed")
+    );
+    assert_eq!(head.e_tag(), Some(etag.as_str()));
+    let tags = reader.get_object_tagging().bucket(&bucket).key(special_key).send().await?;
+    let actual_tags: std::collections::BTreeMap<_, _> = tags
+        .tag_set()
+        .iter()
+        .map(|tag| (tag.key().to_string(), tag.value().to_string()))
+        .collect();
+    assert_eq!(actual_tags.get("purpose").map(String::as_str), Some("compatibility"));
+    assert_eq!(actual_tags.get("scope").map(String::as_str), Some("four-by-four"));
+
+    let conditional = reader
+        .get_object()
+        .bucket(&bucket)
+        .key(special_key)
+        .if_match(&etag)
+        .send()
+        .await?;
+    assert_eq!(conditional.body.collect().await?.into_bytes().as_ref(), special_body.as_slice());
+    let invalid_range = reader
+        .get_object()
+        .bucket(&bucket)
+        .key(special_key)
+        .range("bytes=999999-1000000")
+        .send()
+        .await
+        .expect_err("an unsatisfiable range must fail");
+    assert_eq!(
+        invalid_range.as_service_error().and_then(ProvideErrorMetadata::code),
+        Some("InvalidRange"),
+        "unexpected invalid-range error: {invalid_range:?}"
+    );
+
+    let upload_key = "multipart/aborted.bin";
+    let upload = writer
+        .create_multipart_upload()
+        .bucket(&bucket)
+        .key(upload_key)
+        .send()
+        .await?;
+    let upload_id = upload.upload_id().ok_or("CreateMultipartUpload omitted upload ID")?;
+    writer
+        .upload_part()
+        .bucket(&bucket)
+        .key(upload_key)
+        .upload_id(upload_id)
+        .part_number(1)
+        .body(ByteStream::from(vec![0x5Au8; 5 * 1024 * 1024]))
+        .send()
+        .await?;
+    let pending = reader
+        .list_multipart_uploads()
+        .bucket(&bucket)
+        .prefix("multipart/")
+        .send()
+        .await?;
+    assert!(pending.uploads().iter().any(|entry| entry.upload_id() == Some(upload_id)));
+    writer
+        .abort_multipart_upload()
+        .bucket(&bucket)
+        .key(upload_key)
+        .upload_id(upload_id)
+        .send()
+        .await?;
+    let after_abort = reader
+        .list_multipart_uploads()
+        .bucket(&bucket)
+        .prefix("multipart/")
+        .send()
+        .await?;
+    assert!(after_abort.uploads().iter().all(|entry| entry.upload_id() != Some(upload_id)));
+    let aborted_head = reader
+        .head_object()
+        .bucket(&bucket)
+        .key(upload_key)
+        .send()
+        .await
+        .expect_err("aborted multipart upload must not create an object");
+    assert_eq!(
+        aborted_head.raw_response().map(|response| response.status().as_u16()),
+        Some(404),
+        "aborted multipart object returned an unexpected HEAD result: {aborted_head:?}"
+    );
+
+    for index in 0..113 {
+        let key = format!("page/{index:04}.txt");
+        put_object(&writer, &bucket, &key, format!("page-{index}").into_bytes()).await?;
+    }
+    let mut token = None;
+    let mut paged_keys = Vec::new();
+    loop {
+        let page = reader
+            .list_objects_v2()
+            .bucket(&bucket)
+            .prefix("page/")
+            .max_keys(37)
+            .set_continuation_token(token.take())
+            .send()
+            .await?;
+        paged_keys.extend(page.contents().iter().filter_map(|object| object.key().map(str::to_string)));
+        if page.is_truncated() != Some(true) {
+            break;
+        }
+        token = Some(
+            page.next_continuation_token()
+                .ok_or("truncated ListObjectsV2 page omitted next continuation token")?
+                .to_string(),
+        );
+    }
+    assert_eq!(paged_keys.len(), 113);
+    let expected: Vec<_> = (0..113).map(|index| format!("page/{index:04}.txt")).collect();
+    assert_eq!(paged_keys, expected, "pagination lost, duplicated, or reordered keys");
+    Ok(())
+}
@@ -0,0 +1,94 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DECOMMISSION_POOL_ID, DistCluster, DistLayout, TestResult, assert_inventory, decommission_running_with_progress,
+    decommission_status_json, put_inventory_retrying, rebalance_running_with_progress, rebalance_status_json,
+    retrying_get_equals, retrying_put, start_decommission, start_rebalance, unique_bucket, wait_for_decommission_complete,
+    wait_for_decommission_running_with_progress, wait_for_rebalance_complete, wait_for_rebalance_running_with_progress,
+};
+use crate::common::init_logging;
+use std::time::Duration;
+
+#[tokio::test]
+async fn s3_put_get_list_succeed_during_decommission_and_rebalance() -> TestResult {
+    init_logging();
+    let mut dist = DistCluster::start(DistLayout::SingleNodeFourDrive).await?;
+    let bucket = unique_bucket("s3move");
+    dist.create_bucket(&bucket).await?;
+    let client = dist.client(0)?;
+    let inventory = put_inventory_retrying(&client, &bucket, 96, 256 * 1024, Duration::from_secs(30)).await?;
+    dist.expand_to_four_pools().await?;
+
+    start_decommission(&dist.cluster, DECOMMISSION_POOL_ID).await?;
+    wait_for_decommission_running_with_progress(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(30)).await?;
+    let live = dist.client(2)?;
+    retrying_put(
+        &live,
+        &bucket,
+        "during-decommission.bin",
+        b"written-while-decommissioning".to_vec(),
+        Duration::from_secs(30),
+    )
+    .await?;
+    retrying_get_equals(
+        &live,
+        &bucket,
+        "during-decommission.bin",
+        b"written-while-decommissioning",
+        Duration::from_secs(30),
+    )
+    .await?;
+    let listed = live.list_objects_v2().bucket(&bucket).send().await?;
+    assert!(
+        listed
+            .contents()
+            .iter()
+            .any(|object| object.key() == Some("during-decommission.bin")),
+        "list during decommission missed the newly written key"
+    );
+    let status = decommission_status_json(&dist.cluster).await?;
+    if !decommission_running_with_progress(&status, DECOMMISSION_POOL_ID)? {
+        return Err(format!("decommission did not remain active across the S3 operations: {status}").into());
+    }
+
+    wait_for_decommission_complete(&dist.cluster, DECOMMISSION_POOL_ID, Duration::from_secs(180)).await?;
+    assert_inventory(&live, &bucket, &inventory).await?;
+
+    let rebalance_id = start_rebalance(&dist.cluster).await?;
+    wait_for_rebalance_running_with_progress(&dist.cluster, &rebalance_id, Duration::from_secs(30)).await?;
+    retrying_put(
+        &live,
+        &bucket,
+        "during-rebalance.bin",
+        b"written-while-rebalancing".to_vec(),
+        Duration::from_secs(30),
+    )
+    .await?;
+    retrying_get_equals(
+        &live,
+        &bucket,
+        "during-rebalance.bin",
+        b"written-while-rebalancing",
+        Duration::from_secs(30),
+    )
+    .await?;
+    let status = rebalance_status_json(&dist.cluster).await?;
+    if !rebalance_running_with_progress(&status, &rebalance_id)? {
+        return Err(format!("rebalance did not remain active across the S3 operations: {status}").into());
+    }
+    wait_for_rebalance_complete(&dist.cluster, &rebalance_id, Duration::from_secs(180)).await?;
+    assert_inventory(&dist.client(1)?, &bucket, &inventory).await?;
+    Ok(())
+}
@@ -0,0 +1,128 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{
+    DistCluster, TestResult, cluster_admin_ok, enable_versioning, put_object, unique_bucket, wait_for_replicated_bytes,
+    wait_until,
+};
+use crate::common::{init_logging, signed_request};
+use http::{Method, StatusCode};
+use rustfs_madmin::{PeerSite, ReplicateAddStatus, SiteReplicationInfo, SyncStatus};
+use std::time::Duration;
+
+async fn site_replication_add(
+    cluster: &crate::common::RustFSTestClusterEnvironment,
+    sites: &[PeerSite],
+) -> TestResult<ReplicateAddStatus> {
+    let url = format!("{}/rustfs/admin/v3/site-replication/add?replicateILMExpiry=false", cluster.nodes[0].url);
+    let response = signed_request(
+        Method::PUT,
+        &url,
+        &cluster.access_key,
+        &cluster.secret_key,
+        Some(serde_json::to_vec(sites)?),
+        Some("application/json"),
+    )
+    .await?;
+    if response.status() != StatusCode::OK {
+        let status = response.status();
+        let body = response.text().await.unwrap_or_default();
+        return Err(format!("site replication add failed: {status} {body}").into());
+    }
+    Ok(serde_json::from_slice(&response.bytes().await?)?)
+}
+
+async fn site_replication_info(cluster: &crate::common::RustFSTestClusterEnvironment) -> TestResult<SiteReplicationInfo> {
+    let body = cluster_admin_ok(cluster, Method::GET, "/rustfs/admin/v3/site-replication/info", None).await?;
+    Ok(serde_json::from_str(&body)?)
+}
+
+async fn wait_for_site_replication_enabled(cluster: &crate::common::RustFSTestClusterEnvironment) -> TestResult {
+    wait_until(
+        Duration::from_secs(30),
+        || async {
+            let info = site_replication_info(cluster).await?;
+            Ok(info.enabled && info.sites.len() == 2 && info.sites.iter().all(|site| site.sync_state == SyncStatus::Enable))
+        },
+        "site replication enabled with two synchronized sites",
+    )
+    .await
+}
+
+#[tokio::test]
+async fn four_node_site_replication_replicates_object_to_peer_site() -> TestResult {
+    init_logging();
+    let (site_a, site_b) = DistCluster::start_replication_pair().await?;
+    let bucket = unique_bucket("siterepl");
+    site_a.create_bucket(&bucket).await?;
+    site_b.create_bucket(&bucket).await?;
+
+    let client_a = site_a.client(0)?;
+    let client_b = site_b.client(0)?;
+    enable_versioning(&client_a, &bucket).await?;
+    enable_versioning(&client_b, &bucket).await?;
+
+    let sites = vec![
+        PeerSite {
+            name: "site-a".to_string(),
+            endpoint: site_a.cluster.nodes[0].url.clone(),
+            access_key: site_a.cluster.access_key.clone(),
+            secret_key: site_a.cluster.secret_key.clone(),
+            ..Default::default()
+        },
+        PeerSite {
+            name: "site-b".to_string(),
+            endpoint: site_b.cluster.nodes[0].url.clone(),
+            access_key: site_b.cluster.access_key.clone(),
+            secret_key: site_b.cluster.secret_key.clone(),
+            ..Default::default()
+        },
+    ];
+    let add_status = site_replication_add(&site_a.cluster, &sites).await?;
+    assert!(
+        add_status.success && add_status.err_detail.is_empty() && add_status.initial_sync_error_message.is_empty(),
+        "site replication add reported failure: {add_status:?}"
+    );
+    wait_for_site_replication_enabled(&site_a.cluster).await?;
+    wait_for_site_replication_enabled(&site_b.cluster).await?;
+
+    let info_a = site_replication_info(&site_a.cluster).await?;
+    let remote = info_a
+        .sites
+        .iter()
+        .find(|site| site.name == "site-b")
+        .ok_or_else(|| format!("site A info omitted the configured site-b peer: {info_a:?}"))?;
+    assert_eq!(remote.endpoint, site_b.cluster.nodes[0].url);
+    let deployment_ids: std::collections::BTreeSet<_> = info_a.sites.iter().map(|site| site.deployment_id.as_str()).collect();
+    assert!(
+        deployment_ids.iter().all(|deployment_id| !deployment_id.is_empty()) && deployment_ids.len() == 2,
+        "site peers must have two distinct non-empty deployment IDs: {info_a:?}"
+    );
+    assert!(info_a.retry_stats.is_none(), "site A has pending replication retries: {info_a:?}");
+    assert!(info_a.pending_operation.is_none(), "site A has a pending operation: {info_a:?}");
+
+    let key = "site-object.bin";
+    let body = b"four-node-site-replication".to_vec();
+    put_object(&client_a, &bucket, key, body.clone()).await?;
+    wait_for_replicated_bytes(&client_b, &bucket, key, &body, Duration::from_secs(60)).await?;
+
+    let peer_b = site_b.client(3)?;
+    wait_for_replicated_bytes(&peer_b, &bucket, key, &body, Duration::from_secs(20)).await?;
+
+    let reverse_key = "reverse/site-object.bin";
+    let reverse_body = b"site-b-to-site-a".to_vec();
+    put_object(&site_b.client(2)?, &bucket, reverse_key, reverse_body.clone()).await?;
+    wait_for_replicated_bytes(&site_a.client(3)?, &bucket, reverse_key, &reverse_body, Duration::from_secs(60)).await?;
+    Ok(())
+}
@@ -0,0 +1,345 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! 4-node upgrade coverage for historical objects and IAM AK/SK.
+//!
+//! Complements `upgrade_compatibility_test` (single-node SSE/multipart and
+//! mixed-version listing). This module pins the distributed contract the
+//! hardware upgrade chain is meant to catch: after a 4-node upgrade, objects
+//! written on the previous release still read back, and IAM user credentials
+//! created before the upgrade still authenticate.
+//!
+//! Requires `RUSTFS_UPGRADE_SOURCE_BINARY` pointing at the pinned previous
+//! release. The `e2e-distributed` workflow downloads that binary; a local run
+//! without it fails closed rather than skipping.
+
+use super::harness::{
+    DistCluster, DistLayout, TestResult, assert_object_bytes, cluster_admin_ok, enable_versioning, get_object_bytes, put_object,
+    unique_bucket, wait_until,
+};
+use crate::common::{
+    AdminTransport, admin_add_canned_policy_via, admin_attach_user_policy_via, admin_create_user_via, init_logging,
+};
+use aws_sdk_s3::Client;
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use std::path::{Path, PathBuf};
+use std::time::Duration;
+use uuid::Uuid;
+
+const SOURCE_BINARY_ENV: &str = "RUSTFS_UPGRADE_SOURCE_BINARY";
+const IAM_SECRET: &str = "UpgradeTestSecretKey1";
+const WRONG_SECRET: &str = "WrongSecretKey000000";
+const CREDENTIAL_TIMEOUT: Duration = Duration::from_secs(30);
+
+struct UpgradeSeed {
+    history_bucket: String,
+    history_key: &'static str,
+    history_body: Vec<u8>,
+    versioned_bucket: String,
+    versioned_key: &'static str,
+    version1: String,
+    version1_body: Vec<u8>,
+    version2: String,
+    version2_body: Vec<u8>,
+    iam_bucket: String,
+    iam_key: &'static str,
+    iam_body: Vec<u8>,
+    iam_user: String,
+    iam_secret: &'static str,
+}
+
+fn source_binary() -> TestResult<PathBuf> {
+    let path = std::env::var_os(SOURCE_BINARY_ENV).map(PathBuf::from).ok_or_else(|| {
+        format!(
+            "{SOURCE_BINARY_ENV} must point to the pinned previous release binary (the e2e-distributed workflow downloads it)"
+        )
+    })?;
+    if !path.is_file() {
+        return Err(format!("upgrade source binary does not exist: {}", path.display()).into());
+    }
+    Ok(path)
+}
+
+fn capture_upgrade_logs(cluster: &mut DistCluster, label: &str) -> TestResult {
+    let Some(log_dir) = std::env::var_os("RUSTFS_E2E_LOG_DIR") else {
+        return Ok(());
+    };
+    std::fs::create_dir_all(&log_dir)?;
+    for node_idx in 0..cluster.cluster.nodes.len() {
+        let path = Path::new(&log_dir).join(format!("{label}-node-{node_idx}.log"));
+        cluster
+            .cluster
+            .set_node_capture_log_path(node_idx, path.to_string_lossy().into_owned())?;
+    }
+    Ok(())
+}
+
+fn iam_rw_policy(bucket: &str) -> String {
+    serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Action": ["s3:*"],
+            "Resource": [
+                format!("arn:aws:s3:::{bucket}"),
+                format!("arn:aws:s3:::{bucket}/*")
+            ]
+        }]
+    })
+    .to_string()
+}
+
+async fn create_iam_user(dist: &DistCluster, user: &str, secret: &str, policy_name: &str, bucket: &str) -> TestResult {
+    let url = &dist.cluster.nodes[0].url;
+    let access = &dist.cluster.access_key;
+    let admin_secret = &dist.cluster.secret_key;
+    admin_create_user_via(AdminTransport::Signed, url, access, admin_secret, user, secret).await?;
+    admin_add_canned_policy_via(AdminTransport::Signed, url, access, admin_secret, policy_name, &iam_rw_policy(bucket)).await?;
+    admin_attach_user_policy_via(AdminTransport::Signed, url, access, admin_secret, policy_name, user).await?;
+    Ok(())
+}
+
+async fn wait_for_put(client: &Client, bucket: &str, key: &str, body: Vec<u8>, label: &str) -> TestResult {
+    wait_until(
+        CREDENTIAL_TIMEOUT,
+        || {
+            let client = client.clone();
+            let bucket = bucket.to_string();
+            let key = key.to_string();
+            let body = body.clone();
+            async move {
+                put_object(&client, &bucket, &key, body).await?;
+                Ok(true)
+            }
+        },
+        label,
+    )
+    .await
+}
+
+async fn wait_for_bytes(client: &Client, bucket: &str, key: &str, expected: &[u8], label: &str) -> TestResult {
+    wait_until(
+        CREDENTIAL_TIMEOUT,
+        || {
+            let client = client.clone();
+            let bucket = bucket.to_string();
+            let key = key.to_string();
+            let expected = expected.to_vec();
+            async move {
+                let got = get_object_bytes(&client, &bucket, &key).await?;
+                Ok(got == expected)
+            }
+        },
+        label,
+    )
+    .await
+}
+
+async fn seed_history_and_iam(dist: &DistCluster) -> TestResult<UpgradeSeed> {
+    let history_bucket = unique_bucket("upg-hist");
+    let versioned_bucket = unique_bucket("upg-ver");
+    let iam_bucket = unique_bucket("upg-iam");
+    dist.create_bucket(&history_bucket).await?;
+    dist.create_bucket(&versioned_bucket).await?;
+    dist.create_bucket(&iam_bucket).await?;
+
+    let root = dist.client(0)?;
+    enable_versioning(&root, &versioned_bucket).await?;
+
+    let history_key = "plain-history.bin";
+    let history_body = b"written by the previous 4-node release".to_vec();
+    put_object(&root, &history_bucket, history_key, history_body.clone()).await?;
+
+    let versioned_key = "versioned-history.txt";
+    let version1_body = b"version-one-before-upgrade".to_vec();
+    let version1 = root
+        .put_object()
+        .bucket(&versioned_bucket)
+        .key(versioned_key)
+        .body(aws_sdk_s3::primitives::ByteStream::from(version1_body.clone()))
+        .send()
+        .await?
+        .version_id()
+        .ok_or("first versioned PUT omitted version ID")?
+        .to_string();
+    let version2_body = b"version-two-before-upgrade".to_vec();
+    let version2 = root
+        .put_object()
+        .bucket(&versioned_bucket)
+        .key(versioned_key)
+        .body(aws_sdk_s3::primitives::ByteStream::from(version2_body.clone()))
+        .send()
+        .await?
+        .version_id()
+        .ok_or("second versioned PUT omitted version ID")?
+        .to_string();
+
+    let iam_user = format!("upg{}", &Uuid::new_v4().simple().to_string()[..8]);
+    let policy_name = format!("upgpol{}", &Uuid::new_v4().simple().to_string()[..8]);
+    create_iam_user(dist, &iam_user, IAM_SECRET, &policy_name, &iam_bucket).await?;
+
+    let iam_key = "iam-history.bin";
+    let iam_body = b"written with pre-upgrade IAM AK/SK".to_vec();
+    let iam_client = dist.client_with_credentials(1, &iam_user, IAM_SECRET)?;
+    wait_for_put(&iam_client, &iam_bucket, iam_key, iam_body.clone(), "IAM user PUT before upgrade").await?;
+
+    Ok(UpgradeSeed {
+        history_bucket,
+        history_key,
+        history_body,
+        versioned_bucket,
+        versioned_key,
+        version1,
+        version1_body,
+        version2,
+        version2_body,
+        iam_bucket,
+        iam_key,
+        iam_body,
+        iam_user,
+        iam_secret: IAM_SECRET,
+    })
+}
+
+async fn assert_history_and_iam(dist: &DistCluster, seed: &UpgradeSeed, context: &str) -> TestResult {
+    let root_a = dist.client(0)?;
+    let root_b = dist.client(3)?;
+    wait_for_bytes(
+        &root_b,
+        &seed.history_bucket,
+        seed.history_key,
+        &seed.history_body,
+        &format!("{context}: root GET historical object"),
+    )
+    .await?;
+    assert_object_bytes(&root_a, &seed.history_bucket, seed.history_key, &seed.history_body).await?;
+
+    let v1 = root_b
+        .get_object()
+        .bucket(&seed.versioned_bucket)
+        .key(seed.versioned_key)
+        .version_id(&seed.version1)
+        .send()
+        .await?;
+    let v1_body = v1.body.collect().await?.into_bytes();
+    if v1_body.as_ref() != seed.version1_body.as_slice() {
+        return Err(format!("{context}: version 1 bytes changed after upgrade").into());
+    }
+    let v2 = root_a
+        .get_object()
+        .bucket(&seed.versioned_bucket)
+        .key(seed.versioned_key)
+        .version_id(&seed.version2)
+        .send()
+        .await?;
+    let v2_body = v2.body.collect().await?.into_bytes();
+    if v2_body.as_ref() != seed.version2_body.as_slice() {
+        return Err(format!("{context}: version 2 bytes changed after upgrade").into());
+    }
+
+    let users = cluster_admin_ok(&dist.cluster, http::Method::GET, "/rustfs/admin/v3/list-users", None).await?;
+    if !users.contains(&seed.iam_user) {
+        return Err(format!("{context}: list-users lost IAM user {}: {users}", seed.iam_user).into());
+    }
+
+    let iam_on_upgraded = dist.client_with_credentials(0, &seed.iam_user, seed.iam_secret)?;
+    let iam_on_peer = dist.client_with_credentials(3, &seed.iam_user, seed.iam_secret)?;
+    wait_for_bytes(
+        &iam_on_upgraded,
+        &seed.iam_bucket,
+        seed.iam_key,
+        &seed.iam_body,
+        &format!("{context}: IAM GET historical object on node 0"),
+    )
+    .await?;
+    wait_for_bytes(
+        &iam_on_peer,
+        &seed.iam_bucket,
+        seed.iam_key,
+        &seed.iam_body,
+        &format!("{context}: IAM GET historical object on node 3"),
+    )
+    .await?;
+
+    let post_key = format!("after-upgrade-{context}.txt");
+    let post_body = format!("{context}: written with the same IAM AK/SK after upgrade").into_bytes();
+    wait_for_put(
+        &iam_on_peer,
+        &seed.iam_bucket,
+        &post_key,
+        post_body.clone(),
+        &format!("{context}: IAM PUT after upgrade"),
+    )
+    .await?;
+    assert_object_bytes(&iam_on_upgraded, &seed.iam_bucket, &post_key, &post_body).await?;
+
+    let bad = dist.client_with_credentials(1, &seed.iam_user, WRONG_SECRET)?;
+    match bad.get_object().bucket(&seed.iam_bucket).key(seed.iam_key).send().await {
+        Ok(_) => return Err(format!("{context}: wrong secret must not read the IAM object").into()),
+        Err(error) => {
+            let code = error.as_service_error().and_then(ProvideErrorMetadata::code);
+            let rejected = code == Some("SignatureDoesNotMatch")
+                || code == Some("InvalidAccessKeyId")
+                || code == Some("AccessDenied")
+                || code == Some("InvalidArgument")
+                || error.raw_response().is_some_and(|response| response.status().as_u16() == 403);
+            if !rejected {
+                return Err(format!("{context}: wrong secret failed with unexpected error {error:?}").into());
+            }
+        }
+    }
+
+    let post_root_key = format!("root-after-{context}.bin");
+    let post_root_body = format!("{context}: root write after upgrade").into_bytes();
+    put_object(&root_a, &seed.history_bucket, &post_root_key, post_root_body.clone()).await?;
+    assert_object_bytes(&root_b, &seed.history_bucket, &post_root_key, &post_root_body).await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_direct_upgrade_preserves_history_and_iam_credentials() -> TestResult {
+    init_logging();
+    let previous = source_binary()?;
+    let mut dist = DistCluster::new_stopped(DistLayout::FourNodeFourDisk).await?;
+    capture_upgrade_logs(&mut dist, "direct-upgrade")?;
+    dist.start_from_binary(&previous).await?;
+
+    let seed = seed_history_and_iam(&dist).await?;
+    dist.restart_with_current_binary().await?;
+    assert_history_and_iam(&dist, &seed, "direct").await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_rolling_upgrade_preserves_history_and_iam_credentials() -> TestResult {
+    init_logging();
+    let previous = source_binary()?;
+    let mut dist = DistCluster::new_stopped(DistLayout::FourNodeFourDisk).await?;
+    capture_upgrade_logs(&mut dist, "rolling-upgrade")?;
+    dist.start_from_binary(&previous).await?;
+
+    let seed = seed_history_and_iam(&dist).await?;
+
+    dist.replace_node_with_current_binary(0).await?;
+    assert_history_and_iam(&dist, &seed, "one-current-node").await?;
+
+    for node_idx in [1, 2] {
+        dist.replace_node_with_current_binary(node_idx).await?;
+    }
+    assert_history_and_iam(&dist, &seed, "one-previous-node").await?;
+
+    dist.replace_node_with_current_binary(3).await?;
+    assert_history_and_iam(&dist, &seed, "homogeneous-current").await?;
+    Ok(())
+}
@@ -0,0 +1,188 @@
+// Copyright 2026 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use super::harness::{DistCluster, DistLayout, TestResult, enable_versioning, get_object_bytes, put_object, unique_bucket};
+use crate::common::init_logging;
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use aws_sdk_s3::types::{BucketVersioningStatus, VersioningConfiguration};
+
+#[tokio::test]
+async fn four_node_four_drive_versioning_put_list_get_delete_marker() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("version");
+    dist.create_bucket(&bucket).await?;
+    let writer = dist.client(0)?;
+    let reader = dist.client(3)?;
+    enable_versioning(&writer, &bucket).await?;
+
+    let key = "versioned.txt";
+    let v1_id = writer
+        .put_object()
+        .bucket(&bucket)
+        .key(key)
+        .body(b"v1".to_vec().into())
+        .send()
+        .await?
+        .version_id()
+        .ok_or("v1 PUT omitted version ID")?
+        .to_string();
+    let v2_id = writer
+        .put_object()
+        .bucket(&bucket)
+        .key(key)
+        .body(b"v2".to_vec().into())
+        .send()
+        .await?
+        .version_id()
+        .ok_or("v2 PUT omitted version ID")?
+        .to_string();
+
+    let versions = reader.list_object_versions().bucket(&bucket).prefix(key).send().await?;
+    let matching_versions: Vec<_> = versions
+        .versions()
+        .iter()
+        .filter(|version| version.key() == Some(key))
+        .collect();
+    assert_eq!(matching_versions.len(), 2, "fresh key must have exactly two versions: {versions:?}");
+    assert!(versions.delete_markers().is_empty(), "fresh key unexpectedly has a delete marker");
+    assert!(
+        matching_versions
+            .iter()
+            .any(|version| version.version_id() == Some(v1_id.as_str()) && version.is_latest() != Some(true)),
+        "v1 was not the historical version: {versions:?}"
+    );
+    assert!(
+        matching_versions
+            .iter()
+            .any(|version| version.version_id() == Some(v2_id.as_str()) && version.is_latest() == Some(true)),
+        "v2 was not the latest version: {versions:?}"
+    );
+
+    let latest = get_object_bytes(&reader, &bucket, key).await?;
+    assert_eq!(latest, b"v2");
+
+    let older = reader.get_object().bucket(&bucket).key(key).version_id(&v1_id).send().await?;
+    let older_body = older.body.collect().await?.into_bytes();
+    assert_eq!(older_body.as_ref(), b"v1");
+
+    let deleted = writer.delete_object().bucket(&bucket).key(key).send().await?;
+    assert_eq!(deleted.delete_marker(), Some(true));
+    let marker_id = deleted.version_id().ok_or("DeleteObject omitted delete-marker version ID")?;
+    let after_delete = reader.list_object_versions().bucket(&bucket).prefix(key).send().await?;
+    let matching_markers: Vec<_> = after_delete
+        .delete_markers()
+        .iter()
+        .filter(|marker| marker.key() == Some(key))
+        .collect();
+    assert_eq!(
+        matching_markers.len(),
+        1,
+        "delete marker missing or duplicated after current-version delete: {after_delete:?}"
+    );
+    assert!(
+        matching_markers[0].version_id() == Some(marker_id) && matching_markers[0].is_latest() == Some(true),
+        "DeleteObject response and ListObjectVersions disagree about the marker: {after_delete:?}"
+    );
+
+    let latest_after_delete = reader.get_object().bucket(&bucket).key(key).send().await;
+    match latest_after_delete {
+        Ok(_) => return Err("current version should be a delete marker".into()),
+        Err(error)
+            if error
+                .as_service_error()
+                .and_then(ProvideErrorMetadata::code)
+                .is_some_and(|code| code == "NoSuchKey" || code == "NotFound") => {}
+        Err(error) => return Err(error.into()),
+    }
+
+    let restored = reader.get_object().bucket(&bucket).key(key).version_id(&v1_id).send().await?;
+    let restored_body = restored.body.collect().await?.into_bytes();
+    assert_eq!(restored_body.as_ref(), b"v1");
+
+    writer
+        .delete_object()
+        .bucket(&bucket)
+        .key(key)
+        .version_id(marker_id)
+        .send()
+        .await?;
+    assert_eq!(get_object_bytes(&reader, &bucket, key).await?, b"v2");
+    Ok(())
+}
+
+#[tokio::test]
+async fn four_node_versioning_suspension_keeps_one_null_version_and_history() -> TestResult {
+    init_logging();
+    let dist = DistCluster::start(DistLayout::FourByFour).await?;
+    let bucket = unique_bucket("suspend");
+    dist.create_bucket(&bucket).await?;
+    let writer = dist.client(0)?;
+    let reader = dist.client(3)?;
+    enable_versioning(&writer, &bucket).await?;
+
+    let key = "suspended.txt";
+    let original = writer
+        .put_object()
+        .bucket(&bucket)
+        .key(key)
+        .body(b"enabled-history".to_vec().into())
+        .send()
+        .await?
+        .version_id()
+        .ok_or("enabled PUT omitted version ID")?
+        .to_string();
+    writer
+        .put_bucket_versioning()
+        .bucket(&bucket)
+        .versioning_configuration(
+            VersioningConfiguration::builder()
+                .status(BucketVersioningStatus::Suspended)
+                .build(),
+        )
+        .send()
+        .await?;
+
+    put_object(&writer, &bucket, key, b"null-one".to_vec()).await?;
+    put_object(&writer, &bucket, key, b"null-two".to_vec()).await?;
+    assert_eq!(get_object_bytes(&reader, &bucket, key).await?, b"null-two");
+
+    let versions = reader.list_object_versions().bucket(&bucket).prefix(key).send().await?;
+    let matching: Vec<_> = versions
+        .versions()
+        .iter()
+        .filter(|version| version.key() == Some(key))
+        .collect();
+    assert!(matching.iter().any(|version| version.version_id() == Some(original.as_str())));
+    let null_version_count = matching
+        .iter()
+        .filter(|version| {
+            matches!(
+                version.version_id(),
+                None | Some("") | Some("null") | Some("00000000-0000-0000-0000-000000000000")
+            )
+        })
+        .count();
+    assert_eq!(null_version_count, 1, "suspended overwrites must keep one null version: {versions:?}");
+
+    let historical = reader
+        .get_object()
+        .bucket(&bucket)
+        .key(key)
+        .version_id(&original)
+        .send()
+        .await?;
+    assert_eq!(historical.body.collect().await?.into_bytes().as_ref(), b"enabled-history");
+    Ok(())
+}
@@ -34,12 +34,14 @@ use s3s::dto::{
    AbortMultipartUploadInput, AbortMultipartUploadOutput, CommonPrefix, CompleteMultipartUploadInput,
    CompleteMultipartUploadOutput, CreateMultipartUploadInput, CreateMultipartUploadOutput, DeleteMarkerEntry, DeleteObjectInput,
    DeleteObjectOutput, DeleteObjectTaggingInput, DeleteObjectTaggingOutput, ETag, GetBucketVersioningInput,
-    GetBucketVersioningOutput, GetObjectInput, GetObjectLockConfigurationInput, GetObjectLockConfigurationOutput,
-    GetObjectOutput, GetObjectTaggingInput, GetObjectTaggingOutput, HeadBucketInput, HeadBucketOutput, HeadObjectInput,
+    GetBucketVersioningOutput, GetObjectInput, GetObjectLegalHoldInput, GetObjectLegalHoldOutput,
+    GetObjectLockConfigurationInput, GetObjectLockConfigurationOutput, GetObjectOutput, GetObjectRetentionInput,
+    GetObjectRetentionOutput, GetObjectTaggingInput, GetObjectTaggingOutput, HeadBucketInput, HeadBucketOutput, HeadObjectInput,
    HeadObjectOutput, ListObjectVersionsInput, ListObjectVersionsOutput, ListObjectsV2Input, ListObjectsV2Output, Object,
-    ObjectLockConfiguration, ObjectLockEnabled, ObjectStorageClass, ObjectVersionId, PutObjectInput, PutObjectOutput,
-    PutObjectTaggingInput, PutObjectTaggingOutput, Range, StreamingBlob, Tag, TagSet, Timestamp, TimestampFormat,
-    UploadPartInput, UploadPartOutput,
+    ObjectLockConfiguration, ObjectLockEnabled, ObjectLockLegalHold, ObjectLockLegalHoldStatus, ObjectLockMode,
+    ObjectLockRetention, ObjectLockRetentionMode, ObjectStorageClass, ObjectVersionId, PutObjectInput, PutObjectLegalHoldInput,
+    PutObjectLegalHoldOutput, PutObjectOutput, PutObjectRetentionInput, PutObjectRetentionOutput, PutObjectTaggingInput,
+    PutObjectTaggingOutput, Range, StreamingBlob, Tag, TagSet, Timestamp, TimestampFormat, UploadPartInput, UploadPartOutput,
 };
 use s3s::service::{S3Service, S3ServiceBuilder};
 use s3s::validation::{AwsNameValidation, NameValidation};
@@ -127,6 +129,10 @@ pub enum Operation {
    GetObjectTagging,
    PutObjectTagging,
    DeleteObjectTagging,
+    GetObjectRetention,
+    PutObjectRetention,
+    GetObjectLegalHold,
+    PutObjectLegalHold,
    ListObjectVersions,
    ListObjectsV2,
    CreateMultipartUpload,
@@ -451,10 +457,40 @@ impl JournaledHeaders {
 struct ControlState {
    scripts: HashMap<Operation, VecDeque<FaultAction>>,
    keyed_scripts: HashMap<(Operation, String), VecDeque<FaultAction>>,
+    held_get: Option<HeldGetObject>,
    requests: VecDeque<RequestRecord>,
    next_sequence: u64,
 }

+#[derive(Clone)]
+struct HeldGetObject {
+    bucket: String,
+    key: String,
+    entered: watch::Sender<usize>,
+    released: watch::Receiver<bool>,
+}
+
+/// Holds every GET of one object, including retries, until this guard is dropped.
+#[must_use = "dropping the guard releases the held GET requests"]
+pub struct GetObjectGate {
+    control: Arc<Mutex<ControlState>>,
+    entered: watch::Receiver<usize>,
+    released: watch::Sender<bool>,
+}
+
+impl GetObjectGate {
+    pub async fn wait_until_entered(&mut self) -> Result<(), watch::error::RecvError> {
+        self.entered.wait_for(|count| *count > 0).await.map(|_| ())
+    }
+}
+
+impl Drop for GetObjectGate {
+    fn drop(&mut self) {
+        lock(&self.control).held_get = None;
+        self.released.send_replace(true);
+    }
+}
+
 #[derive(Default)]
 struct StoreState {
    assign_own_version_ids: bool,
@@ -471,6 +507,10 @@ struct StoreState {
    /// PutObject carrying any `x-amz-object-lock-*` header must also carry
    /// `Content-MD5` or an `x-amz-checksum-*` header.
    require_checksum_for_object_lock: bool,
+    /// Models Wasabi (rustfs/backlog#2340): a version-addressed DELETE of a
+    /// version id the target never had answers 404 `NoSuchVersion` instead of
+    /// the idempotent 204 RustFS/MinIO give.
+    reject_unknown_version_deletes: bool,
    limits: StoreLimits,
    buckets: HashMap<String, BucketState>,
    uploads: HashMap<String, MultipartState>,
@@ -535,6 +575,41 @@ struct ObjectVersion {
    /// SSE-C passthrough transport headers stored with the version (RustFS
    /// target behavior); empty when the drop mode discarded them.
    replication_sse_headers: Vec<(String, String)>,
+    /// Object Lock state of the version: retention (mode, retain-until) from
+    /// the PUT / CreateMultipartUpload headers or PutObjectRetention, and the
+    /// legal hold flag; replayed on HEAD.
+    lock: VersionLock,
+}
+
+#[derive(Clone, Default)]
+struct VersionLock {
+    retention: Option<(String, Timestamp)>,
+    /// `None` until a legal hold status was ever set; like S3, HEAD then
+    /// reports nothing, while an explicit OFF is reported as `OFF`.
+    legal_hold: Option<bool>,
+}
+
+impl VersionLock {
+    fn from_headers(
+        mode: Option<ObjectLockMode>,
+        retain_until: Option<Timestamp>,
+        legal_hold: Option<ObjectLockLegalHoldStatus>,
+    ) -> Self {
+        Self {
+            retention: mode.zip(retain_until).map(|(mode, until)| (mode.as_str().to_string(), until)),
+            legal_hold: legal_hold.map(|status| status.as_str().eq_ignore_ascii_case("ON")),
+        }
+    }
+
+    fn legal_hold_status(&self) -> Option<ObjectLockLegalHoldStatus> {
+        self.legal_hold.map(|on| {
+            ObjectLockLegalHoldStatus::from_static(if on {
+                ObjectLockLegalHoldStatus::ON
+            } else {
+                ObjectLockLegalHoldStatus::OFF
+            })
+        })
+    }
 }

 #[derive(Clone)]
@@ -546,6 +621,7 @@ struct MultipartState {
    metadata: Option<HashMap<String, String>>,
    standard_headers: StandardHeaders,
    replication_sse_headers: Vec<(String, String)>,
+    lock: VersionLock,
    parts: BTreeMap<i32, MultipartPart>,
 }

@@ -554,6 +630,10 @@ struct MultipartPart {
    body: Bytes,
    e_tag: String,
    digest: [u8; 16],
+    /// Plaintext length declared by an SSE-C passthrough sender
+    /// (`x-rustfs-replication-part-actual-size`); RustFS validates the 5 MiB
+    /// minimum against it rather than against the stored bytes.
+    actual_size: Option<usize>,
 }

 #[derive(Clone)]
@@ -815,6 +895,7 @@ impl FakeS3Target {
            standard_headers: seed.standard_headers.clone(),
            tags: Vec::new(),
            replication_sse_headers: Vec::new(),
+            lock: VersionLock::default(),
        };
        upsert_version(&mut state, bucket, key.into(), version).expect("seed object must fit the storage budget");
        e_tag
@@ -888,6 +969,12 @@ impl FakeS3Target {
    /// PutObject that carries Object Lock parameters (AWS S3 / MinIO rule,
    /// rustfs#7082). `Content-MD5`, when present, is always verified against
    /// the body regardless of this mode.
+    /// Wasabi-like mode: DELETE of an unknown version id answers 404
+    /// `NoSuchVersion` (the default 204 models RustFS/MinIO).
+    pub fn reject_unknown_version_deletes(&self, enabled: bool) {
+        lock(&self.backend.store).reject_unknown_version_deletes = enabled;
+    }
+
    pub fn require_checksum_for_object_lock(&self, enabled: bool) {
        lock(&self.backend.store).require_checksum_for_object_lock = enabled;
    }
@@ -936,6 +1023,30 @@ impl FakeS3Target {
            .extend(std::iter::repeat_n(action, times));
    }

+    /// Hold one exact bucket/key before any GET response can reach the client.
+    /// The fixture supports one live gate; request and connection deadlines still apply.
+    pub fn hold_get_object(&self, bucket: &str, key: &str) -> GetObjectGate {
+        assert!(
+            bucket.len() <= MAX_RETAINED_IDENTIFIER_BYTES && key.len() <= MAX_RETAINED_IDENTIFIER_BYTES,
+            "held GET identifiers exceed the fixture limit"
+        );
+        let mut state = lock(&self.control);
+        assert!(state.held_get.is_none(), "fake target already holds a GET gate");
+        let (entered, entered_rx) = watch::channel(0);
+        let (released, released_rx) = watch::channel(false);
+        state.held_get = Some(HeldGetObject {
+            bucket: bucket.to_string(),
+            key: key.to_string(),
+            entered,
+            released: released_rx,
+        });
+        GetObjectGate {
+            control: Arc::clone(&self.control),
+            entered: entered_rx,
+            released,
+        }
+    }
+
    pub fn clear_faults(&self) {
        let mut state = lock(&self.control);
        state.scripts.clear();
@@ -1098,6 +1209,10 @@ fn operation_from_s3_name(name: &str) -> Operation {
        "GetObjectTagging" => Operation::GetObjectTagging,
        "PutObjectTagging" => Operation::PutObjectTagging,
        "DeleteObjectTagging" => Operation::DeleteObjectTagging,
+        "GetObjectRetention" => Operation::GetObjectRetention,
+        "PutObjectRetention" => Operation::PutObjectRetention,
+        "GetObjectLegalHold" => Operation::GetObjectLegalHold,
+        "PutObjectLegalHold" => Operation::PutObjectLegalHold,
        "ListObjectsV2" => Operation::ListObjectsV2,
        "CreateMultipartUpload" => Operation::CreateMultipartUpload,
        "UploadPart" => Operation::UploadPart,
@@ -1235,6 +1350,18 @@ fn parse_request(method: &Method, uri: &Uri) -> ParsedRequest {
        (&Method::DELETE, true) if query.contains_key("tagging") && only_query_keys(&["tagging", "versionId"]) => {
            Operation::DeleteObjectTagging
        }
+        (&Method::GET, true) if query.contains_key("retention") && only_query_keys(&["retention", "versionId"]) => {
+            Operation::GetObjectRetention
+        }
+        (&Method::PUT, true) if query.contains_key("retention") && only_query_keys(&["retention", "versionId"]) => {
+            Operation::PutObjectRetention
+        }
+        (&Method::GET, true) if query.contains_key("legal-hold") && only_query_keys(&["legal-hold", "versionId"]) => {
+            Operation::GetObjectLegalHold
+        }
+        (&Method::PUT, true) if query.contains_key("legal-hold") && only_query_keys(&["legal-hold", "versionId"]) => {
+            Operation::PutObjectLegalHold
+        }
        // A replication PUT addresses the source version via `?versionId=`.
        (&Method::PUT, true) if only_query_keys(&["versionId"]) => Operation::PutObject,
        (&Method::GET, true) if only_query_keys(&["versionId"]) => Operation::GetObject,
@@ -1788,6 +1915,28 @@ fn set_version_tags(
    Ok(resolved)
 }

+fn update_version_lock(
+    state: &mut StoreState,
+    bucket: &str,
+    key: &str,
+    version_id: Option<&str>,
+    update: impl FnOnce(&mut VersionLock),
+) -> S3Result<String> {
+    let resolved = find_version(state, bucket, key, version_id)?.version_id;
+    let version = state
+        .buckets
+        .get_mut(bucket)
+        .expect("bucket existence checked by find_version")
+        .objects
+        .get_mut(key)
+        .expect("key existence checked by find_version")
+        .iter_mut()
+        .find(|version| version.version_id == resolved)
+        .expect("version existence checked by find_version");
+    update(&mut version.lock);
+    Ok(resolved)
+}
+
 /// Whether version ids are surfaced for this bucket. Unknown buckets report
 /// `true`; the caller's lookup raises `NoSuchBucket` first.
 fn bucket_versioned(state: &StoreState, bucket: &str) -> bool {
@@ -2227,6 +2376,11 @@ impl S3 for FakeBackend {
            standard_headers,
            tags: Vec::new(),
            replication_sse_headers: captured_replication_sse_headers(&headers, drop_unlisted),
+            lock: VersionLock::from_headers(
+                input.object_lock_mode,
+                input.object_lock_retain_until_date,
+                input.object_lock_legal_hold_status,
+            ),
        };
        upsert_version(&mut lock(&self.store), &input.bucket, input.key, version)?;
        Ok(apply_response_fault(
@@ -2243,6 +2397,17 @@ impl S3 for FakeBackend {
        let fault = request_fault(&req);
        apply_non_body_fault(fault.as_ref(), &self.control).await?;
        let input = req.input;
+        let held_get = lock(&self.control)
+            .held_get
+            .as_ref()
+            .filter(|held| held.bucket == input.bucket && held.key == input.key)
+            .cloned();
+        if let Some(mut held) = held_get {
+            held.entered.send_modify(|count| *count += 1);
+            // Keep the gate installed when a request is cancelled or times out:
+            // a retry must cross the same boundary before returning any bytes.
+            let _ = held.released.wait_for(|released| *released).await;
+        }
        let (version, versioned) = {
            let state = lock(&self.store);
            (
@@ -2274,6 +2439,13 @@ impl S3 for FakeBackend {
            last_modified: Some(version.last_modified.clone()),
            version_id: versioned.then_some(version.version_id),
            sse_customer_algorithm,
+            object_lock_mode: version
+                .lock
+                .retention
+                .as_ref()
+                .map(|(mode, _)| ObjectLockMode::from(mode.clone())),
+            object_lock_retain_until_date: version.lock.retention.as_ref().map(|(_, until)| until.clone()),
+            object_lock_legal_hold_status: version.lock.legal_hold_status(),
            ..Default::default()
        });
        response.status = served.status;
@@ -2308,6 +2480,13 @@ impl S3 for FakeBackend {
            last_modified: Some(version.last_modified.clone()),
            version_id: versioned.then_some(version.version_id),
            sse_customer_algorithm,
+            object_lock_mode: version
+                .lock
+                .retention
+                .as_ref()
+                .map(|(mode, _)| ObjectLockMode::from(mode.clone())),
+            object_lock_retain_until_date: version.lock.retention.as_ref().map(|(_, until)| until.clone()),
+            object_lock_legal_hold_status: version.lock.legal_hold_status(),
            ..Default::default()
        });
        response.status = served.status;
@@ -2367,6 +2546,82 @@ impl S3 for FakeBackend {
        ))
    }

+    async fn get_object_retention(
+        &self,
+        req: S3Request<GetObjectRetentionInput>,
+    ) -> S3Result<S3Response<GetObjectRetentionOutput>> {
+        let fault = request_fault(&req);
+        apply_non_body_fault(fault.as_ref(), &self.control).await?;
+        let input = req.input;
+        let version = find_version(&lock(&self.store), &input.bucket, &input.key, input.version_id.as_deref())?;
+        Ok(apply_response_fault(
+            S3Response::new(GetObjectRetentionOutput {
+                retention: version.lock.retention.map(|(mode, until)| ObjectLockRetention {
+                    mode: Some(ObjectLockRetentionMode::from(mode)),
+                    retain_until_date: Some(until),
+                }),
+            }),
+            fault.as_ref(),
+        ))
+    }
+
+    async fn put_object_retention(
+        &self,
+        req: S3Request<PutObjectRetentionInput>,
+    ) -> S3Result<S3Response<PutObjectRetentionOutput>> {
+        let fault = request_fault(&req);
+        apply_non_body_fault(fault.as_ref(), &self.control).await?;
+        let input = req.input;
+        let retention = input
+            .retention
+            .and_then(|retention| retention.mode.zip(retention.retain_until_date))
+            .map(|(mode, until)| (mode.as_str().to_string(), until));
+        update_version_lock(&mut lock(&self.store), &input.bucket, &input.key, input.version_id.as_deref(), |lock| {
+            lock.retention = retention;
+        })?;
+        Ok(apply_response_fault(S3Response::new(PutObjectRetentionOutput::default()), fault.as_ref()))
+    }
+
+    async fn get_object_legal_hold(
+        &self,
+        req: S3Request<GetObjectLegalHoldInput>,
+    ) -> S3Result<S3Response<GetObjectLegalHoldOutput>> {
+        let fault = request_fault(&req);
+        apply_non_body_fault(fault.as_ref(), &self.control).await?;
+        let input = req.input;
+        let version = find_version(&lock(&self.store), &input.bucket, &input.key, input.version_id.as_deref())?;
+        Ok(apply_response_fault(
+            S3Response::new(GetObjectLegalHoldOutput {
+                legal_hold: Some(ObjectLockLegalHold {
+                    status: Some(
+                        version
+                            .lock
+                            .legal_hold_status()
+                            .unwrap_or_else(|| ObjectLockLegalHoldStatus::from_static(ObjectLockLegalHoldStatus::OFF)),
+                    ),
+                }),
+            }),
+            fault.as_ref(),
+        ))
+    }
+
+    async fn put_object_legal_hold(
+        &self,
+        req: S3Request<PutObjectLegalHoldInput>,
+    ) -> S3Result<S3Response<PutObjectLegalHoldOutput>> {
+        let fault = request_fault(&req);
+        apply_non_body_fault(fault.as_ref(), &self.control).await?;
+        let input = req.input;
+        let legal_hold_on = input
+            .legal_hold
+            .and_then(|hold| hold.status)
+            .is_some_and(|status| status.as_str().eq_ignore_ascii_case("ON"));
+        update_version_lock(&mut lock(&self.store), &input.bucket, &input.key, input.version_id.as_deref(), |lock| {
+            lock.legal_hold = Some(legal_hold_on);
+        })?;
+        Ok(apply_response_fault(S3Response::new(PutObjectLegalHoldOutput::default()), fault.as_ref()))
+    }
+
    async fn delete_object_tagging(
        &self,
        req: S3Request<DeleteObjectTaggingInput>,
@@ -2420,6 +2675,7 @@ impl S3 for FakeBackend {
            return Ok(apply_response_fault(S3Response::new(DeleteObjectOutput::default()), fault.as_ref()));
        }
        if let Some(version_id) = input.version_id {
+            let reject_unknown = state.reject_unknown_version_deletes;
            let (removed_bytes, removed_versions, delete_marker, remove_key) = {
                let Some(versions) = state
                    .buckets
@@ -2428,6 +2684,9 @@ impl S3 for FakeBackend {
                    .objects
                    .get_mut(&input.key)
                else {
+                    if reject_unknown {
+                        return Err(s3s::s3_error!(NoSuchVersion, "The specified version does not exist."));
+                    }
                    return Ok(apply_response_fault(
                        S3Response::new(DeleteObjectOutput {
                            version_id: Some(version_id),
@@ -2436,6 +2695,9 @@ impl S3 for FakeBackend {
                        fault.as_ref(),
                    ));
                };
+                if reject_unknown && !versions.iter().any(|version| version.version_id == version_id) {
+                    return Err(s3s::s3_error!(NoSuchVersion, "The specified version does not exist."));
+                }
                let mut removed_bytes = 0usize;
                let mut removed_versions = 0usize;
                let mut delete_marker = None;
@@ -2489,6 +2751,7 @@ impl S3 for FakeBackend {
                standard_headers: StandardHeaders::default(),
                tags: Vec::new(),
                replication_sse_headers: Vec::new(),
+                lock: VersionLock::default(),
            },
        )?;
        Ok(apply_response_fault(
@@ -2543,6 +2806,11 @@ impl S3 for FakeBackend {
                metadata: input.metadata,
                standard_headers,
                replication_sse_headers: captured_replication_sse_headers(&headers, drop_unlisted),
+                lock: VersionLock::from_headers(
+                    input.object_lock_mode,
+                    input.object_lock_retain_until_date,
+                    input.object_lock_legal_hold_status,
+                ),
                parts: BTreeMap::new(),
            },
        );
@@ -2559,6 +2827,11 @@ impl S3 for FakeBackend {

    async fn upload_part(&self, req: S3Request<UploadPartInput>) -> S3Result<S3Response<UploadPartOutput>> {
        let fault = request_fault(&req);
+        let declared_actual_size = req
+            .headers
+            .get("x-rustfs-replication-part-actual-size")
+            .and_then(|value| value.to_str().ok())
+            .and_then(|value| value.parse::<usize>().ok());
        let _body_permit = timeout(MAX_FAULT_DURATION, Arc::clone(&self.body_limit).acquire_owned())
            .await
            .map_err(|_| s3s::s3_error!(RequestTimeout, "fake target body limiter wait exceeded 30 seconds"))?
@@ -2600,6 +2873,7 @@ impl S3 for FakeBackend {
                body,
                e_tag: e_tag.clone(),
                digest,
+                actual_size: declared_actual_size,
            },
        );
        Ok(apply_response_fault(
@@ -2669,7 +2943,9 @@ impl S3 for FakeBackend {
                if requested_etag != &stored.e_tag {
                    return Err(s3s::s3_error!(InvalidPart, "part ETag does not match"));
                }
-                if index + 1 != requested_parts.len() && stored.body.len() < MIN_MULTIPART_PART_BYTES {
+                if index + 1 != requested_parts.len()
+                    && stored.actual_size.unwrap_or(stored.body.len()) < MIN_MULTIPART_PART_BYTES
+                {
                    return Err(s3s::s3_error!(EntityTooSmall, "non-final multipart part is smaller than 5 MiB"));
                }
                selected.push((*number, stored.clone()));
@@ -2683,6 +2959,7 @@ impl S3 for FakeBackend {
                    metadata: upload.metadata.clone(),
                    standard_headers: upload.standard_headers.clone(),
                    replication_sse_headers: upload.replication_sse_headers.clone(),
+                    lock: upload.lock.clone(),
                    parts: BTreeMap::new(),
                },
                selected,
@@ -2713,6 +2990,7 @@ impl S3 for FakeBackend {
            standard_headers: upload.standard_headers,
            tags: Vec::new(),
            replication_sse_headers: upload.replication_sse_headers,
+            lock: upload.lock,
        };
        let mut state = lock(&self.store);
        let versioned = bucket_versioned(&state, &input.bucket);
@@ -2894,6 +3172,81 @@ mod tests {
        aws_sdk_s3::primitives::DateTime::from_secs(4_102_444_800)
    }

+    #[tokio::test]
+    async fn get_object_gate_holds_retries_and_releases_on_drop() -> Result<(), BoxError> {
+        let target = FakeS3Target::start().await?;
+        let bucket = "gated-target";
+        target.create_bucket(bucket);
+        for key in ["held", "unrelated"] {
+            target.put_seed_object(bucket, key, Bytes::from_static(b"payload"), &SeedMetadata::default());
+        }
+        {
+            let gate = target.hold_get_object(bucket, "held");
+            let request = || S3Request {
+                input: GetObjectInput {
+                    bucket: bucket.to_string(),
+                    key: "held".to_string(),
+                    ..Default::default()
+                },
+                method: Method::GET,
+                uri: Uri::from_static("/gated-target/held"),
+                headers: HeaderMap::new(),
+                extensions: http::Extensions::new(),
+                credentials: None,
+                region: None,
+                service: None,
+                trailing_headers: None,
+            };
+            // Without a fault, only the gate can suspend this backend method.
+            let mut first = target.backend.get_object(request());
+            assert!(futures::poll!(first.as_mut()).is_pending(), "the first GET must wait at the gate");
+            drop(first);
+            let mut retry = target.backend.get_object(request());
+            assert!(futures::poll!(retry.as_mut()).is_pending(), "a cancelled GET must not consume the gate");
+            drop(gate);
+            let std::task::Poll::Ready(response) = futures::poll!(retry.as_mut()) else {
+                panic!("dropping the gate must release the waiting GET");
+            };
+            let mut body = response?.output.body.expect("released GET body");
+            assert_eq!(body.next().await.transpose()?, Some(Bytes::from_static(b"payload")));
+            assert!(body.next().await.is_none(), "released GET body must be complete");
+        }
+        let client = client(&target);
+        let mut gate = target.hold_get_object(bucket, "held");
+        let mut requests = tokio::task::JoinSet::new();
+        let first = client.clone();
+        requests.spawn(async move { get_bytes(&first, bucket, "held", None).await });
+        timeout(Duration::from_secs(2), gate.wait_until_entered()).await??;
+        requests.abort_all();
+        assert!(
+            requests
+                .join_next()
+                .await
+                .expect("first GET task")
+                .expect_err("cancel the first GET attempt")
+                .is_cancelled()
+        );
+
+        let retry = client.clone();
+        requests.spawn(async move { get_bytes(&retry, bucket, "held", None).await });
+        timeout(Duration::from_secs(2), gate.entered.wait_for(|count| *count == 2)).await??;
+        assert_eq!(
+            timeout(Duration::from_secs(2), get_bytes(&client, bucket, "unrelated", None)).await??,
+            Bytes::from_static(b"payload")
+        );
+        assert!(requests.try_join_next().is_none(), "the retry must remain behind the gate");
+        drop(gate);
+        assert_eq!(
+            timeout(Duration::from_secs(2), requests.join_next())
+                .await?
+                .expect("retried GET task")??,
+            Bytes::from_static(b"payload")
+        );
+        assert_eq!(get_bytes(&client, bucket, "held", None).await?, Bytes::from_static(b"payload"));
+        assert_eq!(target.count_requests(Operation::GetObject, "held"), 3);
+        Ok(())
+    }
+
    #[tokio::test]
    async fn object_lock_target_requires_a_checksum_on_locked_puts() -> Result<(), BoxError> {
        use aws_sdk_s3::error::ProvideErrorMetadata;
@@ -4469,6 +4822,7 @@ mod tests {
                        metadata: None,
                        standard_headers: StandardHeaders::default(),
                        replication_sse_headers: Vec::new(),
+                        lock: VersionLock::default(),
                        parts: BTreeMap::new(),
                    },
                );
@@ -16,24 +16,141 @@

 #[cfg(test)]
 mod tests {
-    use crate::chaos::{VersionShardCensus, census_object_version_on_disk, signed_admin_post};
+    use crate::chaos::{VersionShardCensus, census_object_version_on_disk, sha256_hex, signed_admin_post};
    use crate::common::{
        FAST_DATA_USAGE_SCANNER_ENV, RustFSTestClusterEnvironment, RustFSTestEnvironment, admin_request, init_logging,
+        rustfs_binary_path,
    };
    use crate::storage_api::RUSTFS_META_BUCKET;
    use aws_sdk_s3::primitives::ByteStream;
    use http::Method;
+    use sha2::{Digest, Sha256};
    use std::collections::HashSet;
    use std::error::Error;
+    use std::io::{Read, Write};
    use std::net::SocketAddr;
    use std::path::{Path, PathBuf};
    use std::process::Command;
    use tokio::net::TcpStream;
    use tokio::time::{Duration, Instant, sleep, timeout};
    use tracing::info;
+    #[cfg(target_os = "linux")]
+    use tracing::warn;

    const POOL_METADATA_OBJECT: &str = "pool.bin";

+    #[derive(serde::Deserialize)]
+    struct EvidenceBuild {
+        sha256: String,
+    }
+
+    #[derive(serde::Deserialize)]
+    struct RestartEvidenceRun {
+        schema: u32,
+        run_id: String,
+        source_revision: String,
+        test_build: serde_json::Value,
+        binary: EvidenceBuild,
+        test_binary: EvidenceBuild,
+    }
+
+    #[derive(Clone, Copy)]
+    struct ScannerHealEvidenceCase {
+        id: &'static str,
+        oracle: &'static str,
+        evidence: &'static str,
+        unclean_shutdown_marker: bool,
+    }
+
+    const BACKGROUND_TARGET_RESTART_EVIDENCE: ScannerHealEvidenceCase = ScannerHealEvidenceCase {
+        id: "background-target-restart",
+        oracle: "background-target-restart.json",
+        evidence: "process-restart",
+        unclean_shutdown_marker: false,
+    };
+
+    const BACKGROUND_TARGET_CRASH_EVIDENCE: ScannerHealEvidenceCase = ScannerHealEvidenceCase {
+        id: "background-target-crash",
+        oracle: "background-target-crash.json",
+        evidence: "process-crash-restart",
+        unclean_shutdown_marker: true,
+    };
+
+    struct RestartEvidenceContext {
+        directory: PathBuf,
+        run: RestartEvidenceRun,
+        case: ScannerHealEvidenceCase,
+    }
+
+    fn file_sha256(path: &Path) -> Result<String, Box<dyn Error + Send + Sync>> {
+        let mut file = std::fs::File::open(path)?;
+        let mut digest = Sha256::new();
+        let mut buffer = [0_u8; 64 * 1024];
+        loop {
+            let read = file.read(&mut buffer)?;
+            if read == 0 {
+                break;
+            }
+            digest.update(&buffer[..read]);
+        }
+        Ok(digest.finalize().iter().map(|byte| format!("{byte:02x}")).collect())
+    }
+
+    fn restart_evidence_run(
+        binary: &Path,
+        case: ScannerHealEvidenceCase,
+    ) -> Result<Option<RestartEvidenceContext>, Box<dyn Error + Send + Sync>> {
+        let Some(directory) = std::env::var_os("RUSTFS_SCANNER_HEAL_RUN_DIR") else {
+            return Ok(None);
+        };
+        if case.id.is_empty()
+            || case.oracle.is_empty()
+            || !case.oracle.ends_with(".json")
+            || case.oracle.contains('/')
+            || case.oracle.contains('\\')
+            || case.oracle.contains("..")
+            || !matches!(case.evidence, "process-restart" | "process-crash-restart")
+            || (case.evidence == "process-crash-restart") != case.unclean_shutdown_marker
+        {
+            return Err("invalid scanner/heal evidence case".into());
+        }
+        let directory = PathBuf::from(directory);
+        let receipt = directory.join("run.json");
+        if receipt.metadata()?.len() > 1024 * 1024 {
+            return Err("oversized scanner/heal execution receipt".into());
+        }
+        let run: RestartEvidenceRun = serde_json::from_slice(&std::fs::read(receipt)?)?;
+        if run.schema != 1 || run.run_id.len() != 32 || run.source_revision.len() != 40 {
+            return Err("invalid scanner/heal execution identity".into());
+        }
+        let built = compiled_test_identity();
+        for key in ["source_revision", "dirty", "lock_blob", "features"] {
+            assert_eq!(built[key], run.test_build[key], "compiled test identity differs for {key}");
+        }
+        assert_eq!(file_sha256(binary)?, run.binary.sha256, "server binary must match the run receipt");
+        assert_eq!(
+            file_sha256(&std::env::current_exe()?)?,
+            run.test_binary.sha256,
+            "test executable must match the run receipt"
+        );
+        if directory.join(case.oracle).exists() {
+            return Err("scanner/heal oracle already exists; create a new execution receipt".into());
+        }
+        Ok(Some(RestartEvidenceContext { directory, run, case }))
+    }
+
+    fn compiled_test_identity() -> serde_json::Value {
+        serde_json::json!({
+            "source_revision": env!("RUSTFS_E2E_BUILD_COMMIT"),
+            "dirty": env!("RUSTFS_E2E_BUILD_DIRTY") != "false",
+            "lock_blob": env!("RUSTFS_E2E_BUILD_LOCK"),
+            "features": env!("RUSTFS_E2E_BUILD_FEATURES"),
+            "target": env!("RUSTFS_E2E_BUILD_TARGET"),
+            "profile": env!("RUSTFS_E2E_BUILD_PROFILE"),
+            "rustflags_hex": env!("RUSTFS_E2E_BUILD_RUSTFLAGS_HEX"),
+        })
+    }
+
    struct TcpPortBlackhole {
        port: u16,
        comment: String,
@@ -42,6 +159,49 @@ mod tests {
    }

    impl TcpPortBlackhole {
+        /// Environment flag that turns an unusable fault-injection host into a
+        /// hard failure instead of a logged skip. Lanes that provision
+        /// `CAP_NET_ADMIN` set it so a broken runner cannot pass silently.
+        #[cfg(target_os = "linux")]
+        const REQUIRE_ENV: &str = "RUSTFS_E2E_REQUIRE_NET_FAULT_INJECTION";
+
+        /// Probe whether this host can manipulate the OUTPUT chain at all.
+        ///
+        /// Returns `Ok(Some(reason))` when `iptables` is missing or lacks
+        /// `CAP_NET_ADMIN` (the nf_tables backend reports "Permission denied"
+        /// even under `sudo` inside an unprivileged container) and the lane did
+        /// not demand fault injection; returns an error when the lane demands
+        /// it; returns `Ok(None)` when the blackhole can be installed.
+        #[cfg(target_os = "linux")]
+        fn unavailable_reason() -> Result<Option<String>, Box<dyn Error + Send + Sync>> {
+            let id = Command::new("id").arg("-u").output()?;
+            if !id.status.success() {
+                return Err(format!("failed to determine the test process uid: {}", String::from_utf8_lossy(&id.stderr)).into());
+            }
+            let use_sudo = String::from_utf8_lossy(&id.stdout).trim() != "0";
+            let mut command = if use_sudo {
+                let mut command = Command::new("sudo");
+                command.args(["-n", "iptables"]);
+                command
+            } else {
+                Command::new("iptables")
+            };
+            let probe = command.args(["-w", "5", "-S", "OUTPUT"]).output();
+            let reason = match probe {
+                Ok(output) if output.status.success() => return Ok(None),
+                Ok(output) => format!(
+                    "iptables cannot read the OUTPUT chain (status {}): {}",
+                    output.status,
+                    String::from_utf8_lossy(&output.stderr).trim()
+                ),
+                Err(err) => format!("iptables is not runnable: {err}"),
+            };
+            if std::env::var_os(Self::REQUIRE_ENV).is_some() {
+                return Err(format!("{} is set but network fault injection is unavailable: {reason}", Self::REQUIRE_ENV).into());
+            }
+            Ok(Some(reason))
+        }
+
        fn install(address: &str) -> Result<Self, Box<dyn Error + Send + Sync>> {
            let address = address.parse::<SocketAddr>()?;
            if !address.ip().is_loopback() {
@@ -126,6 +286,27 @@ mod tests {
        }
    }

+    /// Remove a disk directory underneath a running server. Background writers
+    /// (scanner, usage cache, heal markers) can recreate entries between the
+    /// recursive listing and the final `rmdir`, which surfaces as
+    /// `DirectoryNotEmpty` on macOS; retry briefly so the wipe reflects the
+    /// operator action rather than a listing race.
+    fn wipe_directory_while_server_runs(disk: &Path) -> std::io::Result<()> {
+        let mut last_err = None;
+        for _ in 0..20 {
+            match std::fs::remove_dir_all(disk) {
+                Ok(()) => return Ok(()),
+                Err(err) if err.kind() == std::io::ErrorKind::NotFound => return Ok(()),
+                Err(err) if err.kind() == std::io::ErrorKind::DirectoryNotEmpty => {
+                    last_err = Some(err);
+                    std::thread::sleep(std::time::Duration::from_millis(100));
+                }
+                Err(err) => return Err(err),
+            }
+        }
+        Err(last_err.expect("retry loop only exits without success after recording an error"))
+    }
+
    fn has_file_under(path: &Path) -> bool {
        let Ok(entries) = std::fs::read_dir(path) else {
            return false;
@@ -195,8 +376,9 @@ mod tests {
        clients: &[aws_sdk_s3::Client],
        bucket: &str,
        expected_keys: &HashSet<String>,
-    ) -> Result<(), Box<dyn Error + Send + Sync>> {
+    ) -> Result<Vec<Vec<String>>, Box<dyn Error + Send + Sync>> {
        const PAGE_SIZE: i32 = 10;
+        let mut node_listings = Vec::with_capacity(clients.len());
        for (node_index, client) in clients.iter().enumerate() {
            let mut listed_keys = Vec::new();
            let mut continuation_token = None;
@@ -243,8 +425,10 @@ mod tests {
                &listed_key_set, expected_keys,
                "node {node_index} did not expose the complete recovered namespace"
            );
+            listed_keys.sort();
+            node_listings.push(listed_keys);
        }
-        Ok(())
+        Ok(node_listings)
    }

    fn heal_task_status_diagnostic(body: &str) -> String {
@@ -405,7 +589,7 @@ mod tests {
            );
        }

-        std::fs::remove_dir_all(&disk0).expect("disk0 wipe should succeed while server is running");
+        wipe_directory_while_server_runs(&disk0).expect("disk0 wipe should succeed while server is running");
        std::fs::create_dir_all(&disk0).expect("disk0 should be recreated empty while server is running");
        assert!(!has_file_under(&disk0), "disk0 must be empty immediately after runtime wipe");

@@ -779,6 +963,16 @@ mod tests {
        .await?
    }

+    #[tokio::test(flavor = "multi_thread")]
+    async fn test_cluster_root_heal_recovers_remote_shards_after_background_target_crash()
+    -> Result<(), Box<dyn Error + Send + Sync>> {
+        timeout(
+            Duration::from_secs(420),
+            run_cluster_root_heal_interruption(InterruptionScenario::BackgroundTargetCrash),
+        )
+        .await?
+    }
+
    #[tokio::test(flavor = "multi_thread")]
    async fn test_cluster_root_heal_recovers_remote_shards_after_coordinator_restart() -> Result<(), Box<dyn Error + Send + Sync>>
    {
@@ -792,6 +986,18 @@ mod tests {
    #[cfg(target_os = "linux")]
    #[tokio::test(flavor = "multi_thread")]
    async fn test_cluster_root_heal_recovers_after_target_endpoint_blackhole() -> Result<(), Box<dyn Error + Send + Sync>> {
+        if let Some(reason) = TcpPortBlackhole::unavailable_reason()? {
+            init_logging();
+            warn!(
+                event = "heal_interruption_skipped",
+                component = "e2e_test",
+                subsystem = "heal",
+                interruption_kind = "target_endpoint_blackhole",
+                reason,
+                "Skipping endpoint blackhole scenario: network fault injection is unavailable on this host"
+            );
+            return Ok(());
+        }
        timeout(
            Duration::from_secs(420),
            run_cluster_root_heal_interruption(InterruptionScenario::TargetEndpointBlackhole),
@@ -803,14 +1009,27 @@ mod tests {
    enum InterruptionScenario {
        IsolatedTargetRestart,
        BackgroundTargetRestart,
+        BackgroundTargetCrash,
        BackgroundCoordinatorRestart,
        TargetEndpointBlackhole,
    }

    async fn run_cluster_root_heal_interruption(scenario: InterruptionScenario) -> Result<(), Box<dyn Error + Send + Sync>> {
+        let server_binary = rustfs_binary_path();
+        let evidence_run = match scenario {
+            InterruptionScenario::BackgroundTargetRestart => {
+                restart_evidence_run(&server_binary, BACKGROUND_TARGET_RESTART_EVIDENCE)?
+            }
+            InterruptionScenario::BackgroundTargetCrash => {
+                restart_evidence_run(&server_binary, BACKGROUND_TARGET_CRASH_EVIDENCE)?
+            }
+            _ => None,
+        };
+        let mut evidence_objects = Vec::new();
        let (background_enabled, interruption_node, interruption_kind) = match scenario {
            InterruptionScenario::IsolatedTargetRestart => (false, 1, "target_restart"),
            InterruptionScenario::BackgroundTargetRestart => (true, 1, "background_target_restart"),
+            InterruptionScenario::BackgroundTargetCrash => (true, 1, "background_target_crash"),
            InterruptionScenario::BackgroundCoordinatorRestart => (true, 0, "coordinator_restart"),
            InterruptionScenario::TargetEndpointBlackhole => (false, 1, "target_endpoint_blackhole"),
        };
@@ -855,7 +1074,7 @@ mod tests {
        for node_index in 0..cluster.nodes.len() {
            cluster.set_node_capture_log_path(node_index, format!("{log_dir}/node{node_index}.log"))?;
        }
-        cluster.start().await?;
+        cluster.start_with_binary(&server_binary).await?;
        let clients = cluster.create_all_clients()?;

        let bucket = "heal-restart-during-rebuild";
@@ -877,6 +1096,7 @@ mod tests {
            .unwrap_or(4 * 1024 * 1024)
            .clamp(1024 * 1024, 16 * 1024 * 1024);
        let mut expected_manifests = Vec::with_capacity(online_object_count);
+        let mut unclean_shutdown_marker_observed = None;
        for index in 0..online_object_count {
            let key = format!("cluster/online/object-{index:04}.bin");
            let payload_seed = u8::try_from(index + 1).expect("clamped object count must fit in u8");
@@ -996,7 +1216,7 @@ mod tests {
            }
        }

-        cluster.start_node(1).await?;
+        cluster.start_node_from_binary(1, &server_binary).await?;

        let status_url = format!("{}/rustfs/admin/v3/background-heal/status", cluster.nodes[0].url);
        let recovery_deadline = Instant::now() + Duration::from_secs(60);
@@ -1242,8 +1462,12 @@ mod tests {
                stable_window_secs,
                "Restored target endpoint forwarding"
            );
+        } else {
+            if scenario == InterruptionScenario::BackgroundTargetRestart {
+                cluster.stop_node_gracefully(interruption_node).await?;
            } else {
                cluster.stop_node(interruption_node)?;
+            }
            let stopped_count = metadata_count(&replaced_disk, bucket, &expected_manifests);
            assert!(
                stopped_count > 0 && stopped_count < expected_manifests.len(),
@@ -1259,9 +1483,12 @@ mod tests {
                .join(".rustfs.sys")
                .join("unclean-shutdown");
            if background_enabled {
+                let marker_exists = unclean_shutdown_marker.is_file();
+                unclean_shutdown_marker_observed = Some(marker_exists);
+                let expected_marker = !matches!(scenario, InterruptionScenario::BackgroundTargetRestart);
                assert!(
-                    unclean_shutdown_marker.is_file(),
-                    "background restart must retain the real unclean-shutdown marker"
+                    marker_exists == expected_marker,
+                    "background restart/crash lane observed unexpected unclean-shutdown marker state"
                );
            } else {
                match std::fs::remove_file(&unclean_shutdown_marker) {
@@ -1274,7 +1501,7 @@ mod tests {
                    }
                }
            }
-            cluster.start_node(interruption_node).await?;
+            cluster.start_node_from_binary(interruption_node, &server_binary).await?;
            if interruption_node == 0 {
                let target = cluster.nodes[1]
                    .process
@@ -1373,7 +1600,7 @@ mod tests {
            .map(|manifest| manifest.key.clone())
            .collect::<HashSet<_>>();
        assert!(expected_keys.insert(outage_key.to_string()));
-        assert_all_nodes_list_exact_keys(&clients, bucket, &expected_keys).await?;
+        let node_listings = assert_all_nodes_list_exact_keys(&clients, bucket, &expected_keys).await?;

        let target_client = cluster.create_s3_client(1)?;
        for expected in &expected_manifests {
@@ -1381,11 +1608,31 @@ mod tests {
            let actual = response.body.collect().await?.into_bytes();
            let expected_body = deterministic_object_body(object_size_bytes, expected.payload_seed);
            assert_eq!(actual.as_ref(), expected_body.as_slice(), "object body changed for {}", expected.key);
+            if evidence_run.is_some() {
+                evidence_objects.push(serde_json::json!({
+                    "key": expected.key, "version_id": expected.shard_census.version_id,
+                    "expected_bytes": expected_body.len(), "actual_bytes": actual.len(),
+                    "expected_sha256": sha256_hex(&expected_body),
+                    "actual_sha256": sha256_hex(&actual),
+                    "expected_physical": expected.shard_census,
+                    "physical": census_object_version_on_disk(&replaced_disk, bucket, &expected.key, None)?,
+                }));
+            }
        }
        let response = target_client.get_object().bucket(bucket).key(outage_key).send().await?;
        let actual = response.body.collect().await?.into_bytes();
        let expected_outage_body = deterministic_object_body(object_size_bytes, outage_payload_seed);
        assert_eq!(actual.as_ref(), expected_outage_body.as_slice(), "object body changed for {outage_key}");
+        if evidence_run.is_some() {
+            evidence_objects.push(serde_json::json!({
+                "key": outage_key, "version_id": null,
+                "expected_bytes": expected_outage_body.len(), "actual_bytes": actual.len(),
+                "expected_sha256": sha256_hex(&expected_outage_body),
+                "actual_sha256": sha256_hex(&actual),
+                "expected_physical": null,
+                "physical": census_object_version_on_disk(&replaced_disk, bucket, outage_key, None)?,
+            }));
+        }

        let terminal_deadline = Instant::now() + Duration::from_secs(30);
        loop {
@@ -1432,6 +1679,37 @@ mod tests {
            return Err(format!("heal data rebuilt but task did not finish successfully: {task_status}").into());
        }

+        if let Some(evidence_context) = evidence_run {
+            let restarted_pid = cluster.nodes[1].process.as_ref().ok_or("restarted target is absent")?.id();
+            assert_ne!(target_pid, restarted_pid, "target must be a new process");
+            assert_eq!(
+                file_sha256(&server_binary)?,
+                evidence_context.run.binary.sha256,
+                "server build changed during restart"
+            );
+            let evidence = serde_json::json!({
+                "schema": 1, "case": evidence_context.case.id, "evidence": evidence_context.case.evidence,
+                "run_id": evidence_context.run.run_id, "source_revision": evidence_context.run.source_revision,
+                "test_build": compiled_test_identity(),
+                "binary_sha256": evidence_context.run.binary.sha256,
+                "test_binary_sha256": evidence_context.run.test_binary.sha256,
+                "topology": {"nodes": cluster.nodes.len(), "drives_per_node": cluster.nodes[0].data_dirs.len()},
+                "pid_before": target_pid, "pid_after": restarted_pid,
+                "unclean_shutdown_marker": unclean_shutdown_marker_observed.unwrap_or(false),
+                "objects": evidence_objects, "node_listings": node_listings,
+            });
+            let data = serde_json::to_vec(&evidence)?;
+            if data.len() > 1024 * 1024 {
+                return Err("scanner/heal oracle exceeds the 1 MiB artifact budget".into());
+            }
+            let mut output = std::fs::OpenOptions::new()
+                .write(true)
+                .create_new(true)
+                .open(evidence_context.directory.join(evidence_context.case.oracle))?;
+            output.write_all(&data)?;
+            output.sync_all()?;
+        }
+
        Ok(())
    }

@@ -378,6 +378,11 @@ mod bucket_stats_regression_test;
 #[cfg(test)]
 mod distributed_startup_regression_test;

+// 4-node / 4-disk distributed Actions suite (S3, lock, versioning, replication,
+// quota, observability, expand/decommission/rebalance, site replication, chaos).
+#[cfg(test)]
+mod distributed;
+
 // P1 regression: tier/ILM transition (rustfs#5218, #5130, #5011, #4826, #5024)
 #[cfg(test)]
 mod tier_transition_regression_test;
@@ -20,9 +20,10 @@
 //! journal (`count_requests`) carries the assertion in every one of them.

 use super::common::{BoxError, OdmTestEnv, RawResponse, SeedObject, start_configured_env};
-use crate::fake_s3_target::Operation;
+use crate::fake_s3_target::{FaultAction, Operation};
 use aws_sdk_s3::types::{BucketVersioningStatus, VersioningConfiguration};
 use bytes::Bytes;
+use futures::{StreamExt, TryStreamExt};
 use std::time::Duration;

 type TestResult = Result<(), BoxError>;
@@ -145,14 +146,38 @@ async fn test_odm_range_burst_overflows_the_pull_queue_without_failing_clients()
    .await?;

    let body = payload(128 * 1024);
+    let blocker = "queue/blocker.bin";
+    env.seed_source(SOURCE_BUCKET, &[SeedObject::new(blocker, body.clone())]);
+    // The one-chunk range completes immediately; its full background pull
+    // occupies the only slot while the remaining requests fill the queue.
+    env.source.inject_for_key(
+        Operation::GetObject,
+        blocker,
+        FaultAction::SlowSendBody {
+            chunk_bytes: 1024,
+            delay: Duration::from_millis(100),
+        },
+        2,
+    );
+    let response = env
+        .raw_object_request(http::Method::GET, bucket, blocker, &[("range", "bytes=0-1023")])
+        .await?;
+    assert_eq!(response.status, 206);
+    assert_eq!(response.body, body.slice(0..1024));
+    env.wait_for_status_counter(bucket, "/inflight_pulls", 1, SETTLE).await?;
+
    let keys: Vec<String> = (0..REQUESTS).map(|index| format!("queue/object-{index:03}.bin")).collect();
    let seeds: Vec<SeedObject> = keys.iter().map(|key| SeedObject::new(key.clone(), body.clone())).collect();
    env.seed_source(SOURCE_BUCKET, &seeds);

-    let responses: Vec<RawResponse> = futures::future::try_join_all(
+    // Bound source connections below the fixture's limit while still
+    // submitting all 100 requests to the eight-slot background queue.
+    let responses: Vec<RawResponse> = futures::stream::iter(
        keys.iter()
            .map(|key| env.raw_object_request(http::Method::GET, bucket, key, &[("range", "bytes=0-1023")])),
    )
+    .buffered(16)
+    .try_collect()
    .await?;
    for (key, response) in keys.iter().zip(&responses) {
        assert_eq!(response.status, 206, "{key}: {}", String::from_utf8_lossy(&response.body));
@@ -168,6 +193,15 @@ async fn test_odm_range_burst_overflows_the_pull_queue_without_failing_clients()
        .wait_for_status_counter(bucket, "/counters/pull_failures_total/queue_full", 1, SETTLE)
        .await?;
    assert!(queue_full > 0, "a 100-deep burst must overflow an 8-slot queue");
+    let queue_full = usize::try_from(queue_full)?;
+    assert!(queue_full <= REQUESTS);
+    env.wait_for_status_counter(
+        bucket,
+        "/counters/pulled_objects_total/background",
+        u64::try_from(REQUESTS + 1 - queue_full)?,
+        SETTLE,
+    )
+    .await?;

    let ranged_reads: usize = keys.iter().map(|key| source_get_count(&env, key)).sum();
    assert!(
@@ -175,9 +209,6 @@ async fn test_odm_range_burst_overflows_the_pull_queue_without_failing_clients()
        "every reader is served from the source: {ranged_reads} GETs for {REQUESTS} readers"
    );
    let dropped = keys.iter().filter(|key| source_get_count(&env, key) == 1).count();
-    assert!(
-        dropped > 0,
-        "the overflowed keys are the ones with no backfill GET, but every key got one"
-    );
+    assert_eq!(dropped, queue_full, "only overflowed keys remain without a background GET");
    Ok(())
 }
@@ -21,7 +21,7 @@
 use super::common::{BoxError, OdmSourceSpec, OdmTestEnv, SeedObject};
 use crate::fake_s3_target::{BucketMode, Operation};
 use aws_sdk_s3::error::ProvideErrorMetadata;
-use aws_sdk_s3::types::{BucketVersioningStatus, VersioningConfiguration};
+use aws_sdk_s3::types::{BucketVersioningStatus, ObjectAttributes, VersioningConfiguration};
 use bytes::Bytes;
 use std::time::Duration;

@@ -103,11 +103,19 @@ async fn get_miss_pulls_inline_and_serves_locally_afterwards() -> TestResult {

 #[tokio::test]
 async fn get_large_object_streams_through_and_backfills_in_background() -> TestResult {
+    const PART_SIZE: usize = 5 * 1024 * 1024;
    let bucket = "odm-get-large";
-    let env = configured_env(bucket, |spec| spec.policy.inline_max_bytes = 4096).await?;
+    let env = configured_env(bucket, |spec| {
+        spec.policy.inline_max_bytes = 4096;
+        spec.policy.multipart_part_size_bytes = u64::try_from(PART_SIZE).expect("part size fits in u64");
+    })
+    .await?;
    let key = "large/archive.bin";
-    let body = payload(512 * 1024);
-    env.seed_source(SOURCE_BUCKET, &[SeedObject::new(key, body.clone())]);
+    let body = payload(PART_SIZE + 4096);
+    let etag = env
+        .seed_source(SOURCE_BUCKET, &[SeedObject::new(key, body.clone())])
+        .remove(0);
+    assert_eq!(etag.len(), 32, "the source fixture has a plain MD5 ETag");

    let response = env.raw_get(bucket, key).await?;
    assert_eq!(response.status, 200, "{}", String::from_utf8_lossy(&response.body));
@@ -125,6 +133,68 @@ async fn get_large_object_streams_through_and_backfills_in_background() -> TestR
        vec![None, None],
        "one passthrough GET plus one background pull, both unranged"
    );
+
+    let source_requests = env.source.requests().len();
+    let second_part = env.client.get_object().bucket(bucket).key(key).part_number(2).send().await?;
+    assert_eq!(second_part.content_length(), Some(4096), "the completed second part is the tail");
+    assert_eq!(
+        second_part.content_range(),
+        Some(format!("bytes {PART_SIZE}-{}/{}", body.len() - 1, body.len()).as_str()),
+        "partNumber reads the stored multipart boundary"
+    );
+    assert_eq!(
+        second_part.body.collect().await?.into_bytes(),
+        body.slice(PART_SIZE..),
+        "the local second part contains the exact source tail"
+    );
+    let third_part = env
+        .client
+        .get_object()
+        .bucket(bucket)
+        .key(key)
+        .part_number(3)
+        .send()
+        .await
+        .expect_err("the completed object has exactly two parts");
+    assert_eq!(third_part.code(), Some("InvalidPart"));
+
+    let mut part_marker = None;
+    for (part_number, part_size) in [(1, PART_SIZE), (2, 4096)] {
+        let attributes = env
+            .client
+            .get_object_attributes()
+            .bucket(bucket)
+            .key(key)
+            .object_attributes(ObjectAttributes::ObjectParts)
+            .object_attributes(ObjectAttributes::Etag)
+            .max_parts(1)
+            .set_part_number_marker(part_marker.clone())
+            .send()
+            .await?;
+        assert_eq!(
+            attributes.e_tag().map(|value| value.trim_matches('"')),
+            Some(etag.as_str()),
+            "multipart write-back preserves the source MD5 ETag"
+        );
+        let parts = attributes
+            .object_parts()
+            .expect("RustFS must expose the stored multipart layout");
+        assert_eq!(parts.total_parts_count(), Some(2));
+        assert_eq!(parts.max_parts(), Some(1));
+        assert_eq!(parts.is_truncated(), Some(part_number == 1));
+        assert_eq!(parts.parts().len(), 1, "RustFS returns one stored part per requested page");
+        assert_eq!(parts.parts()[0].part_number(), Some(part_number));
+        assert_eq!(parts.parts()[0].size(), Some(i64::try_from(part_size).expect("part size fits in i64")));
+        part_marker = parts.next_part_number_marker().map(str::to_owned);
+        if part_number == 1 {
+            assert_eq!(part_marker.as_deref(), Some("1"), "the next request continues after the first part");
+        }
+    }
+    assert_eq!(
+        env.source.requests().len(),
+        source_requests,
+        "local part reads must not consult the source"
+    );
    Ok(())
 }

@@ -22,17 +22,21 @@
 //! local object and what the source was asked for.

 use super::common::{
-    AdminResponse, BoxError, OdmEnvOptions, OdmSourceSpec, OdmTestEnv, SeedObject, start_configured_env,
-    start_configured_env_with,
+    ALLOW_LOOPBACK_SOURCE_ENV, AdminResponse, BackfillOp, BackfillRequest, BoxError, ODM_MODULE_SWITCH_ENV, ODM_SERVER_ENV,
+    OdmEnvOptions, OdmSourceSpec, OdmTestEnv, SeedObject, start_configured_env, start_configured_env_with, start_source_rustfs,
 };
 use crate::common::{RustFSTestEnvironment, replication_fast_env, signed_request};
 use crate::fake_s3_target::{BucketMode, FAKE_ACCESS_KEY, FAKE_SECRET_KEY, FakeS3Target, Operation};
 use crate::object_lock::common::put_object_lock_configuration;
+use crate::replication_extension_test::{
+    ReplicationTargetOptions, enable_bucket_versioning, set_replication_target_with_options,
+};
 use aws_sdk_s3::error::ProvideErrorMetadata;
 use aws_sdk_s3::types::{
    BucketVersioningStatus, Event, FilterRule, FilterRuleName, NotificationConfiguration, NotificationConfigurationFilter,
-    ObjectLockRetentionMode, QueueConfiguration, S3KeyFilter, ServerSideEncryption, ServerSideEncryptionByDefault,
-    ServerSideEncryptionConfiguration, ServerSideEncryptionRule, VersioningConfiguration,
+    ObjectAttributes, ObjectLockRetentionMode, QueueConfiguration, S3KeyFilter, ServerSideEncryption,
+    ServerSideEncryptionByDefault, ServerSideEncryptionConfiguration, ServerSideEncryptionRule, Tag, Tagging,
+    VersioningConfiguration,
 };
 use bytes::Bytes;
 use local_ip_address::local_ip;
@@ -580,6 +584,130 @@ async fn test_odm_pulled_object_replicates_and_target_as_source_is_rejected() ->
        "a bucket may not migrate from its own replication target: {}",
        rejected.body
    );
+    Box::pin(assert_odm_multipart_replicates_to_rustfs(&env, bucket)).await?;
+    Ok(())
+}
+
+async fn assert_odm_multipart_replicates_to_rustfs(env: &OdmTestEnv, bucket: &str) -> TestResult {
+    const PART_SIZE: usize = 5 * 1024 * 1024;
+    let replica = start_source_rustfs().await?;
+    let replica_bucket = "odm-real-replica";
+    replica.create_test_bucket(replica_bucket).await?;
+    enable_bucket_versioning(&replica, replica_bucket).await?;
+    let arn = set_replication_target_with_options(
+        &env.rustfs,
+        bucket,
+        ReplicationTargetOptions {
+            endpoint: &replica.address,
+            access_key: &replica.access_key,
+            secret_key: &replica.secret_key,
+            target_bucket: replica_bucket,
+            secure: false,
+            skip_tls_verify: false,
+            ca_cert_pem: None,
+        },
+    )
+    .await?;
+    put_bucket_replication(&env.rustfs, bucket, &arn).await?;
+    let mut spec = env.fake_source_spec(SOURCE_BUCKET);
+    // Below the 16 MiB inline default the pull is one tee'd PUT with a single
+    // part; force the passthrough + background multipart write-back instead.
+    spec.policy.inline_max_bytes = 4096;
+    spec.policy.multipart_part_size_bytes = PART_SIZE as u64;
+    spec.policy.preserve_etag = true;
+    env.configure_and_wait(bucket, &spec).await?;
+
+    let key = "replicated/preserved-md5-multipart.bin";
+    let body = payload(PART_SIZE + 4096);
+    let source_put = env
+        .source_client()
+        .put_object()
+        .bucket(SOURCE_BUCKET)
+        .key(key)
+        .body(aws_sdk_s3::primitives::ByteStream::from(body.clone()))
+        .send()
+        .await?;
+    let etag = source_put.e_tag().ok_or("source PUT omitted its ETag")?.trim_matches('"');
+    assert_eq!(etag.len(), 32, "the source must retain a single-PUT MD5 ETag");
+    assert!(etag.bytes().all(|byte| byte.is_ascii_hexdigit()));
+    let pulled = env.raw_get(bucket, key).await?;
+    assert_eq!(pulled.status, 200, "{}", String::from_utf8_lossy(&pulled.body));
+    assert_eq!(pulled.body, body);
+    assert!(env.wait_local_listed(bucket, key, SETTLE).await?, "the multipart pull must persist");
+
+    let deadline = Instant::now() + SETTLE;
+    let source_head = loop {
+        let head = env.client.head_object().bucket(bucket).key(key).send().await?;
+        match head.replication_status().map(|status| status.as_str()) {
+            Some("COMPLETED") => break head,
+            Some("FAILED") => return Err("the ODM multipart copy failed replication to RustFS".into()),
+            _ => {
+                assert!(Instant::now() < deadline, "the ODM multipart copy never completed replication to RustFS");
+                tokio::time::sleep(Duration::from_millis(200)).await;
+            }
+        }
+    };
+    let version = source_head
+        .version_id()
+        .ok_or("the versioned ODM copy omitted its version id")?;
+    assert_ne!(version, "null");
+    let replica_client = replica.create_s3_client();
+    for (client, object_bucket) in [(&env.client, bucket), (&replica_client, replica_bucket)] {
+        let attributes = client
+            .get_object_attributes()
+            .bucket(object_bucket)
+            .key(key)
+            .version_id(version)
+            .object_attributes(ObjectAttributes::Etag)
+            .object_attributes(ObjectAttributes::ObjectParts)
+            .send()
+            .await?;
+        assert_eq!(attributes.e_tag().map(|value| value.trim_matches('"')), Some(etag));
+        let parts = attributes
+            .object_parts()
+            .ok_or("the local copy and replica must both expose two parts")?;
+        assert_eq!(parts.total_parts_count(), Some(2));
+        assert_eq!(
+            parts
+                .parts()
+                .iter()
+                .map(|part| (part.part_number(), part.size()))
+                .collect::<Vec<_>>(),
+            [(Some(1), Some(PART_SIZE as i64)), (Some(2), Some(4096))]
+        );
+    }
+    // REPLICA status surfaces on HEAD, like the other inbound-replica checks.
+    let replica_head = replica_client
+        .head_object()
+        .bucket(replica_bucket)
+        .key(key)
+        .version_id(version)
+        .send()
+        .await?;
+    assert_eq!(replica_head.replication_status().map(|status| status.as_str()), Some("REPLICA"));
+    let replica_get = replica_client
+        .get_object()
+        .bucket(replica_bucket)
+        .key(key)
+        .version_id(version)
+        .send()
+        .await?;
+    assert_eq!(replica_get.version_id(), Some(version));
+    assert_eq!(replica_get.body.collect().await?.into_bytes(), body);
+    let boundary = replica_client
+        .get_object()
+        .bucket(replica_bucket)
+        .key(key)
+        .version_id(version)
+        .range(format!("bytes={}-{}", PART_SIZE - 32, PART_SIZE + 31))
+        .send()
+        .await?;
+    assert_eq!(boundary.body.collect().await?.into_bytes(), body.slice(PART_SIZE - 32..PART_SIZE + 32));
+    assert_eq!(
+        env.source.count_requests(Operation::GetObject, key),
+        2,
+        "one passthrough GET plus one background pull; replication and local reads must not fetch the migration source again"
+    );
    Ok(())
 }

@@ -733,6 +861,242 @@ async fn test_odm_disable_keeps_pulled_objects_and_stops_source_traffic() -> Tes
    Ok(())
 }

+/// The process switch preserves configured buckets and unfinished jobs while
+/// restoring local-only S3 behavior, including after an ordinary metadata write.
+#[tokio::test]
+async fn test_odm_global_disable_preserves_data_config_and_backfill_across_restarts() -> TestResult {
+    let bucket = "odm-global-disable";
+    let mut env = start_configured_env(bucket, SOURCE_BUCKET, |spec| spec.policy.list_through = true).await?;
+    let pulled_key = "migrated/pulled.bin";
+    let remote_key = "remote/untouched.bin";
+    let pending_key = "backfill/pending.bin";
+    let local_key = "local/kept.bin";
+    let source_body = Bytes::from_static(b"source payload");
+    let local_body = Bytes::from_static(b"client payload");
+    env.seed_source(
+        SOURCE_BUCKET,
+        &[
+            SeedObject::new(pulled_key, source_body.clone()),
+            SeedObject::new(remote_key, source_body.clone()),
+            SeedObject::new(pending_key, source_body.clone()),
+        ],
+    );
+    env.client
+        .put_object()
+        .bucket(bucket)
+        .key(local_key)
+        .body(local_body.clone().into())
+        .send()
+        .await?;
+    let pulled = env.raw_get(bucket, pulled_key).await?;
+    assert_eq!(pulled.status, 200);
+    assert_eq!(pulled.header(ODM_RESPONSE_HEADER), Some("source"));
+    assert_eq!(pulled.body, source_body);
+    let stored = env.raw_get(bucket, pulled_key).await?;
+    assert_eq!(stored.status, 200);
+    assert_eq!(stored.header(ODM_RESPONSE_HEADER), None, "the inline pull has committed locally");
+    assert_eq!(stored.body, source_body);
+    let config = env.get_config(bucket).await?;
+    assert_eq!(config.status, 200, "{}", config.body);
+    let config = config.json()?;
+
+    // Hold every attempt until the process has exited, so retries cannot commit
+    // the only backfill object before the crash. The start checkpoint exists.
+    let mut pending_get = env.source.hold_get_object(SOURCE_BUCKET, pending_key);
+    let started = env
+        .start_backfill(
+            bucket,
+            BackfillRequest {
+                prefix: Some("backfill/".to_string()),
+                ..BackfillRequest::default()
+            },
+        )
+        .await?;
+    assert_eq!(started.status, 200, "{}", started.body);
+    let job_id = started.json()?["job"]["job_id"].as_str().ok_or("missing job ID")?.to_string();
+    tokio::time::timeout(Duration::from_secs(10), pending_get.wait_until_entered())
+        .await
+        .expect("backfill never reached the held source GET")?;
+    let process = env.rustfs.process.as_mut().ok_or("missing RustFS process before crash")?;
+    assert!(process.try_wait()?.is_none(), "RustFS exited before the controlled crash");
+    process.kill()?;
+    let stopped = process.wait()?;
+    assert!(!stopped.success(), "the interrupted process must exit after being killed");
+    drop(env.rustfs.process.take());
+    drop(pending_get);
+    env.source.take_requests();
+    env.rustfs
+        .restart_server_preserving_data(vec![], &[(ODM_MODULE_SWITCH_ENV, "false"), (ALLOW_LOOPBACK_SOURCE_ENV, "true")])
+        .await?;
+
+    let off_config = env.get_config(bucket).await?;
+    assert_eq!(off_config.status, 200, "{}", off_config.body);
+    assert_eq!(off_config.json()?, config, "the saved configuration and timestamp survive disabling");
+    let status = env.status_json(bucket).await?;
+    assert_eq!(status["configured"], true, "{status}");
+    assert_eq!(status["enabled"], true, "the bucket remains configured as enabled: {status}");
+    assert_eq!(status["module_enabled"], false, "{status}");
+    assert_eq!(status["counters"], Value::Null, "no bucket runtime is installed: {status}");
+    let checkpoint = env.backfill_job(bucket).await?.ok_or("disabled module lost the checkpoint")?;
+    assert_eq!(checkpoint["job_id"], job_id);
+    assert_eq!(checkpoint["state"], "running", "the interrupted job is retained: {checkpoint}");
+
+    for (key, body) in [(local_key, &local_body), (pulled_key, &source_body)] {
+        let get = env.raw_get(bucket, key).await?;
+        assert_eq!(get.status, 200);
+        assert_eq!(&get.body, body);
+        assert_eq!(get.header(ODM_RESPONSE_HEADER), None);
+        let head = env.client.head_object().bucket(bucket).key(key).send().await?;
+        assert_eq!(head.content_length(), Some(i64::try_from(body.len())?));
+    }
+    for key in [remote_key, pending_key] {
+        let get = env.raw_get(bucket, key).await?;
+        assert_eq!(get.status, 404, "disabled source GET {key}: {}", String::from_utf8_lossy(&get.body));
+        let head = env.client.head_object().bucket(bucket).key(key).send().await;
+        let err = head.expect_err("a source-only object must remain absent locally");
+        assert_eq!(err.raw_response().map(|response| response.status().as_u16()), Some(404));
+    }
+
+    let replacement = Bytes::from_static(b"written while the module is off");
+    for key in [local_key, "local/deleted.bin"] {
+        env.client
+            .put_object()
+            .bucket(bucket)
+            .key(key)
+            .body(replacement.clone().into())
+            .send()
+            .await?;
+    }
+    env.client
+        .delete_object()
+        .bucket(bucket)
+        .key("local/deleted.bin")
+        .send()
+        .await?;
+    assert_eq!(env.raw_get(bucket, "local/deleted.bin").await?.status, 404);
+    assert_eq!(env.raw_get(bucket, local_key).await?.body, replacement);
+
+    // Both wire protocols must finish their local pages even though the saved
+    // configuration still requests list-through.
+    for use_v2 in [false, true] {
+        let mut cursor = None;
+        let mut listed = Vec::new();
+        for page_number in 0..2 {
+            let (keys, truncated, next) = if use_v2 {
+                let page = env
+                    .client
+                    .list_objects_v2()
+                    .bucket(bucket)
+                    .max_keys(1)
+                    .set_continuation_token(cursor)
+                    .send()
+                    .await?;
+                (
+                    page.contents()
+                        .iter()
+                        .map(|object| object.key().expect("listed key").to_string())
+                        .collect::<Vec<_>>(),
+                    page.is_truncated(),
+                    page.next_continuation_token().map(str::to_string),
+                )
+            } else {
+                let page = env
+                    .client
+                    .list_objects()
+                    .bucket(bucket)
+                    .max_keys(1)
+                    .set_marker(cursor)
+                    .send()
+                    .await?;
+                // V1 may omit NextMarker without a delimiter; clients then
+                // continue from the last returned key.
+                let next = page.next_marker().or_else(|| {
+                    if page.is_truncated() == Some(true) {
+                        page.contents().last().and_then(|object| object.key())
+                    } else {
+                        None
+                    }
+                });
+                (
+                    page.contents()
+                        .iter()
+                        .map(|object| object.key().expect("listed key").to_string())
+                        .collect::<Vec<_>>(),
+                    page.is_truncated(),
+                    next.map(str::to_string),
+                )
+            };
+            assert_eq!(keys.len(), 1, "one local key per page, V2={use_v2}");
+            assert_eq!(truncated, Some(page_number == 0), "local pagination must terminate, V2={use_v2}");
+            if page_number == 0 {
+                assert!(next.as_ref().is_some_and(|value| !value.is_empty()), "missing local cursor, V2={use_v2}");
+            }
+            cursor = next;
+            listed.extend(keys);
+        }
+        assert_eq!(listed, [local_key, pulled_key], "source-only keys must stay absent, V2={use_v2}");
+    }
+
+    let spec = env.fake_source_spec(SOURCE_BUCKET);
+    for response in [
+        env.configure_source(bucket, &spec).await?,
+        env.validate_source(bucket, &spec).await?,
+        env.backfill(bucket, BackfillOp::Start(BackfillRequest::default())).await?,
+    ] {
+        assert_eq!(response.status, 400, "{}", response.body);
+        assert!(response.body.contains("OnDemandMigrationDisabled"), "{}", response.body);
+    }
+    let tagging = Tagging::builder()
+        .tag_set(Tag::builder().key("module").value("disabled").build()?)
+        .build()?;
+    env.client
+        .put_bucket_tagging()
+        .bucket(bucket)
+        .tagging(tagging.clone())
+        .send()
+        .await?;
+    assert_eq!(env.get_config(bucket).await?.json()?, config, "an unrelated metadata write preserves ODM");
+    assert_eq!(
+        env.backfill_job(bucket).await?,
+        Some(checkpoint),
+        "no recovery or checkpoint update while disabled"
+    );
+    assert!(
+        env.source.requests().is_empty(),
+        "disabled startup and all requests must leave the source untouched"
+    );
+
+    env.rustfs.restart_server_preserving_data(vec![], ODM_SERVER_ENV).await?;
+    env.wait_until_source_consulted(bucket).await?;
+    assert_eq!(
+        env.get_config(bucket).await?.json()?,
+        config,
+        "reenabling uses the persisted configuration"
+    );
+    let tags = env.client.get_bucket_tagging().bucket(bucket).send().await?;
+    assert_eq!(tags.tag_set(), tagging.tag_set(), "the ordinary metadata write also persists");
+    let resumed = env.raw_get(bucket, remote_key).await?;
+    assert_eq!(resumed.status, 200);
+    assert_eq!(resumed.header(ODM_RESPONSE_HEADER), Some("source"));
+    assert_eq!(resumed.body, source_body, "stored credentials still authenticate without reconfiguration");
+    let completed = env
+        .wait_for_backfill(bucket, SETTLE, |job| job["state"] == "completed")
+        .await?;
+    assert_eq!(completed["job_id"], job_id, "the interrupted job resumes without a new start");
+    assert_eq!(completed["failed"], 0, "{completed}");
+    for (key, body) in [
+        (local_key, &replacement),
+        (pulled_key, &source_body),
+        (pending_key, &source_body),
+    ] {
+        let get = env.raw_get(bucket, key).await?;
+        assert_eq!(get.status, 200);
+        assert_eq!(&get.body, body);
+        assert_eq!(get.header(ODM_RESPONSE_HEADER), None, "{key} remains stored locally");
+    }
+    Ok(())
+}
+
 /// Case 19: the admin surface an operator sees — the configuration read back
 /// without its secret, and a status document whose counters match the source
 /// journal exactly.
@@ -265,16 +265,13 @@ async fn list_through_rejects_a_tampered_continuation_token() -> TestResult {
    let decoded = String::from_utf8(base64_simd::STANDARD.decode_to_vec(token.as_bytes())?)?;
    assert!(decoded.contains("\"t\":\"odm-list\""), "the merged token is an envelope: {decoded}");

-    let tampered = base64_simd::STANDARD.encode_to_string(decoded.replace("\"v\":1", "\"v\":2").as_bytes());
-    let rejected = env
-        .raw_list_objects_v2(bucket, &format!("continuation-token={tampered}"))
-        .await?;
-    assert_eq!(
-        rejected.status,
-        400,
-        "a bumped token version is a client error: {}",
-        String::from_utf8_lossy(&rejected.body)
-    );
+    let tampered = base64_simd::STANDARD.encode_to_string(decoded.replace("\"v\":1", "\"v\":3").as_bytes());
+    assert_ne!(tampered, token, "the test must change the token version");
+    let query = serde_urlencoded::to_string([("continuation-token", tampered.as_str())])?;
+    let rejected = env.raw_list_objects_v2(bucket, &query).await?;
+    let error_body = String::from_utf8_lossy(&rejected.body);
+    assert_eq!(rejected.status, 400, "a bumped token version is a client error: {}", error_body);
+    assert!(error_body.contains("<Code>InvalidArgument</Code>"), "{error_body}");
    Ok(())
 }

@@ -368,23 +368,23 @@ impl Drop for SlowReplicationTargetGuard {
 // Mirrors madmin-go `ResyncTargetsInfo`/`ResyncTarget` json tags — the same
 // shape `mc replicate resync status` decodes.
 #[derive(Debug, Clone, serde::Deserialize)]
-struct ReplicationResetStatusResponse {
+pub(crate) struct ReplicationResetStatusResponse {
    #[serde(rename = "target", default)]
-    targets: Vec<ReplicationResetStatusTarget>,
+    pub(crate) targets: Vec<ReplicationResetStatusTarget>,
 }

 #[derive(Debug, Clone, serde::Deserialize)]
-struct ReplicationResetStatusTarget {
+pub(crate) struct ReplicationResetStatusTarget {
    #[serde(rename = "arn", default)]
-    arn: String,
+    pub(crate) arn: String,
    #[serde(rename = "resetid", default)]
-    reset_id: String,
+    pub(crate) reset_id: String,
    #[serde(rename = "resyncStatus", default)]
-    status: String,
+    pub(crate) status: String,
    #[serde(rename = "replicationCount", default)]
-    replicated_count: i64,
+    pub(crate) replicated_count: i64,
    #[serde(rename = "object", default)]
-    object: String,
+    pub(crate) object: String,
 }

 fn extract_xml_tag(xml: &str, tag: &str) -> Option<String> {
@@ -512,7 +512,7 @@ pub(crate) async fn put_bucket_replication(
    put_bucket_replication_with_delete_statuses(env, bucket, target_arn, "Enabled", None).await
 }

-async fn put_bucket_replication_with_delete_statuses(
+pub(crate) async fn put_bucket_replication_with_delete_statuses(
    env: &RustFSTestEnvironment,
    bucket: &str,
    target_arn: &str,
@@ -627,7 +627,7 @@ async fn put_bucket_replication_rules(
    Ok(())
 }

-async fn delete_bucket_replication(
+pub(crate) async fn delete_bucket_replication(
    env: &RustFSTestEnvironment,
    bucket: &str,
 ) -> Result<reqwest::Response, Box<dyn Error + Send + Sync>> {
@@ -2294,7 +2294,7 @@ async fn site_replication_state_edit(
 /// return the target `(arn, reset_id)`, asserting the response carries the
 /// madmin `ResyncTargetsInfo` shape (`target[0].arn` / `target[0].resetid`)
 /// that `mc replicate resync start` decodes.
-async fn start_bucket_replication_reset(
+pub(crate) async fn start_bucket_replication_reset(
    env: &RustFSTestEnvironment,
    bucket: &str,
 ) -> Result<(String, String), Box<dyn Error + Send + Sync>> {
@@ -2314,7 +2314,7 @@ async fn start_bucket_replication_reset(
    Ok((arn, reset_id))
 }

-async fn get_replication_reset_status(
+pub(crate) async fn get_replication_reset_status(
    env: &RustFSTestEnvironment,
    bucket: &str,
    arn: &str,
@@ -3837,6 +3837,244 @@ async fn test_bucket_replication_converges_delete_marker_and_version_purge() ->
    Ok(())
 }

+/// Regression for rustfs/backlog#2340 (not Wasabi specific): a directory
+/// marker (`prefix/` with a body) in a versioned bucket is stored as the null
+/// version, like MinIO (`putOpts`: "for directory objects skip creating new
+/// versions"), and must still replicate to completion instead of staying
+/// `PENDING`.
+#[tokio::test]
+async fn test_bucket_replication_replicates_directory_marker_in_versioned_bucket() -> TestResult {
+    init_logging();
+
+    let mut source_env = RustFSTestEnvironment::new().await?;
+    let mut source_env_vars = replication_fast_env();
+    source_env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    source_env.start_rustfs_server_with_env(vec![], &source_env_vars).await?;
+
+    let mut target_env = RustFSTestEnvironment::new().await?;
+    target_env.start_rustfs_server_without_cleanup(vec![]).await?;
+
+    let source_bucket = "replication-dir-marker-src";
+    let target_bucket = "replication-dir-marker-dst";
+    let source_client = source_env.create_s3_client();
+    let target_client = target_env.create_s3_client();
+
+    source_client.create_bucket().bucket(source_bucket).send().await?;
+    target_client.create_bucket().bucket(target_bucket).send().await?;
+    enable_bucket_versioning(&source_env, source_bucket).await?;
+    enable_bucket_versioning(&target_env, target_bucket).await?;
+    let target_arn = set_replication_target(&source_env, source_bucket, &target_env, target_bucket).await?;
+    put_bucket_replication(&source_env, source_bucket, &target_arn).await?;
+
+    let marker_key = "dir/trailing/";
+    let body = b"directory marker body";
+    let put = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(marker_key)
+        .body(ByteStream::from_static(body))
+        .send()
+        .await?;
+    assert!(
+        put.version_id()
+            .is_none_or(|id| id == "null" || id == uuid::Uuid::nil().to_string()),
+        "a directory marker is the null version even in a versioned bucket: {:?}",
+        put.version_id()
+    );
+
+    wait_for_source_replication_status(&source_client, source_bucket, marker_key, "COMPLETED", false).await?;
+
+    let replica = target_client
+        .get_object()
+        .bucket(target_bucket)
+        .key(marker_key)
+        .send()
+        .await?;
+    assert_eq!(replica.body.collect().await?.into_bytes().as_ref(), body);
+    let listed = target_client
+        .list_object_versions()
+        .bucket(target_bucket)
+        .prefix(marker_key)
+        .send()
+        .await?;
+    let marker_versions: Vec<_> = listed.versions().iter().filter(|v| v.key() == Some(marker_key)).collect();
+    assert_eq!(marker_versions.len(), 1, "the marker must land exactly once: {marker_versions:?}");
+    assert_eq!(
+        marker_versions[0].version_id(),
+        Some("null"),
+        "the replica keeps the null version identity"
+    );
+
+    Ok(())
+}
+
+/// Regression for rustfs/backlog#2340 (not Wasabi specific): permanently
+/// deleting a version whose payload lives in a data dir must leave the source
+/// clean once the purge replicates. Managed-SSE objects are never inlined and a
+/// plain object above the inline threshold takes the same layout. The version
+/// retained with a pending purge used to lose its data dir, so the purge state
+/// could never be applied (`VersionNotFound` on every retry) and the bucket
+/// stayed `BucketNotEmpty` while `ListObjectVersions` was already empty.
+#[tokio::test]
+async fn test_bucket_replication_version_purge_of_non_inline_object_releases_source_bucket() -> TestResult {
+    init_logging();
+
+    let (source_env, target_env, source_bucket, target_bucket) = build_sse_replication_pair("purge-datadir", true, true).await?;
+    let target_arn = wait_for_remote_target_arn(&source_env, &source_bucket).await?;
+    put_bucket_replication_with_delete_statuses(&source_env, &source_bucket, &target_arn, "Enabled", Some("Enabled")).await?;
+    let source_client = source_env.create_s3_client();
+    let target_client = target_env.create_s3_client();
+
+    let sse_key = "sse-object.bin";
+    let large_key = "large-object.bin";
+    let sse_put = source_client
+        .put_object()
+        .bucket(&source_bucket)
+        .key(sse_key)
+        .body(ByteStream::from_static(b"encrypted source payload"))
+        .server_side_encryption(ServerSideEncryption::Aes256)
+        .send()
+        .await?;
+    let large_put = source_client
+        .put_object()
+        .bucket(&source_bucket)
+        .key(large_key)
+        .body(ByteStream::from(vec![0x5a; 2 * 1024 * 1024]))
+        .send()
+        .await?;
+    let purged = [
+        (sse_key, sse_put.version_id().ok_or("SSE PUT omitted version ID")?.to_string()),
+        (large_key, large_put.version_id().ok_or("large PUT omitted version ID")?.to_string()),
+    ];
+    assert_replication_converged(&source_client, &source_bucket, &target_client, &target_bucket).await?;
+
+    for (key, version_id) in &purged {
+        source_client
+            .delete_object()
+            .bucket(&source_bucket)
+            .key(*key)
+            .version_id(version_id)
+            .send()
+            .await?;
+    }
+    assert_replication_converged(&source_client, &source_bucket, &target_client, &target_bucket).await?;
+    let target_state = list_replication_state(&target_client, &target_bucket).await?;
+    assert!(target_state.is_empty(), "target retained an explicitly purged version: {target_state:?}");
+
+    // The purge state is applied on the source asynchronously after the target
+    // acknowledges the delete; only then does the retained version go away and
+    // the bucket become deletable. A listing that is empty while DeleteBucket
+    // keeps answering BucketNotEmpty is exactly the regression.
+    let deadline = tokio::time::Instant::now() + Duration::from_secs(60);
+    loop {
+        let listing = source_client.list_object_versions().bucket(&source_bucket).send().await?;
+        let listed = listing.versions().len() + listing.delete_markers().len();
+        match source_client.delete_bucket().bucket(&source_bucket).send().await {
+            Ok(_) => break,
+            Err(err) if err.code() == Some("BucketNotEmpty") => {
+                if tokio::time::Instant::now() >= deadline {
+                    return Err(format!(
+                        "source bucket stayed BucketNotEmpty after the version purge replicated; \
+                         ListObjectVersions shows {listed} entries"
+                    )
+                    .into());
+                }
+                sleep(Duration::from_millis(500)).await;
+            }
+            Err(err) => return Err(err.into()),
+        }
+    }
+
+    Ok(())
+}
+
+/// Regression for rustfs/backlog#2340 (not Wasabi specific): a single-part
+/// object uploaded with `x-amz-checksum-*` must reach the target with the same
+/// checksum. The outbound options keyed the stored record by algorithm name,
+/// which the target client sent as `x-amz-meta-*` user metadata, so a replica
+/// never carried a checksum although the source HEAD returned one.
+#[tokio::test]
+async fn test_bucket_replication_forwards_single_part_object_checksums() -> TestResult {
+    init_logging();
+
+    let mut source_env = RustFSTestEnvironment::new().await?;
+    let mut source_env_vars = replication_fast_env();
+    source_env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    source_env.start_rustfs_server_with_env(vec![], &source_env_vars).await?;
+
+    let mut target_env = RustFSTestEnvironment::new().await?;
+    target_env.start_rustfs_server_without_cleanup(vec![]).await?;
+
+    let source_bucket = "replication-checksum-src";
+    let target_bucket = "replication-checksum-dst";
+    let source_client = source_env.create_s3_client();
+    let target_client = target_env.create_s3_client();
+
+    source_client.create_bucket().bucket(source_bucket).send().await?;
+    target_client.create_bucket().bucket(target_bucket).send().await?;
+    enable_bucket_versioning(&source_env, source_bucket).await?;
+    enable_bucket_versioning(&target_env, target_bucket).await?;
+    let target_arn = set_replication_target(&source_env, source_bucket, &target_env, target_bucket).await?;
+    put_bucket_replication(&source_env, source_bucket, &target_arn).await?;
+
+    let body = b"123456789";
+    let crc32_key = "checksum-crc32.txt";
+    let sha256_key = "checksum-sha256.txt";
+    let crc32_put = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(crc32_key)
+        .body(ByteStream::from_static(body))
+        .checksum_algorithm(aws_sdk_s3::types::ChecksumAlgorithm::Crc32)
+        .send()
+        .await?;
+    let expected_crc32 = crc32_put.checksum_crc32().ok_or("source PUT omitted CRC32")?.to_string();
+    let sha256_put = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(sha256_key)
+        .body(ByteStream::from_static(body))
+        .checksum_algorithm(aws_sdk_s3::types::ChecksumAlgorithm::Sha256)
+        .send()
+        .await?;
+    let expected_sha256 = sha256_put.checksum_sha256().ok_or("source PUT omitted SHA256")?.to_string();
+
+    for key in [crc32_key, sha256_key] {
+        wait_for_source_replication_status(&source_client, source_bucket, key, "COMPLETED", false).await?;
+    }
+
+    let replica = target_client
+        .head_object()
+        .bucket(target_bucket)
+        .key(crc32_key)
+        .checksum_mode(aws_sdk_s3::types::ChecksumMode::Enabled)
+        .send()
+        .await?;
+    assert_eq!(replica.checksum_crc32(), Some(expected_crc32.as_str()), "replica lost the CRC32 checksum");
+    let replica = target_client
+        .head_object()
+        .bucket(target_bucket)
+        .key(sha256_key)
+        .checksum_mode(aws_sdk_s3::types::ChecksumMode::Enabled)
+        .send()
+        .await?;
+    assert_eq!(
+        replica.checksum_sha256(),
+        Some(expected_sha256.as_str()),
+        "replica lost the SHA256 checksum"
+    );
+    // The bare algorithm name must not leak as user metadata either.
+    assert!(
+        replica
+            .metadata()
+            .is_none_or(|meta| !meta.keys().any(|k| k.eq_ignore_ascii_case("sha256"))),
+        "replica carries the checksum as user metadata: {:?}",
+        replica.metadata()
+    );
+
+    Ok(())
+}
+
 #[tokio::test]
 async fn test_bucket_replication_disabled_delete_marker_does_not_propagate() -> TestResult {
    init_logging();
@@ -8817,9 +9055,11 @@ async fn test_replication_check_flags_multipart_only_version_minting_target() ->
            .is_some_and(|error| error.contains("CreateMultipartUpload")),
        "the failure must name the multipart path: {payload}"
    );
-    // The PutObject leg mirrored, so it is the multipart probe that failed.
+    // The PutObject leg mirrored, so it is the multipart probe that failed;
+    // the mutation phases address the id the PUT reported and still run.
    assert_eq!(target_report["Phases"]["Put"]["Status"], "OK", "{payload}");
-    assert_eq!(target_report["Phases"]["DeleteMarker"]["Status"], "SKIPPED", "{payload}");
+    assert_eq!(target_report["Phases"]["DeleteMarker"]["Status"], "OK", "{payload}");
+    assert_eq!(target_report["Phases"]["VersionDelete"]["Status"], "OK", "{payload}");
    assert_eq!(target_report["Phases"]["Cleanup"]["Status"], "OK", "{payload}");

    let probe_key = target
@@ -9007,6 +9247,9 @@ async fn test_replication_check_flags_version_minting_target() -> TestResult {
    let target_bucket = "version-fidelity-dst";
    target.create_bucket(target_bucket);
    target.assign_own_version_ids(true);
+    // Wasabi shape: the probe version the VersionDelete phase removed answers
+    // NoSuchVersion to cleanup's second DELETE, which must count as clean.
+    target.reject_unknown_version_deletes(true);

    let mut source_env = RustFSTestEnvironment::new().await?;
    let mut env_vars = replication_fast_env();
@@ -9051,11 +9294,13 @@ async fn test_replication_check_flags_version_minting_target() -> TestResult {
        fidelity["Code"], "BucketRemoteTargetVersionMismatch",
        "the failure must carry a machine-readable code: {payload}"
    );
-    // The probe PUT itself succeeded (fidelity is judged from its response);
-    // the later mutation phases are pointless against a drifting target and
-    // must be skipped, but cleanup still runs.
+    // The probe PUT itself succeeded (fidelity is judged from its response).
+    // The mutation phases address the id the target assigned — the ledger
+    // the worker records per object (rustfs/backlog#2340) — so they run and
+    // pass on a drifting target, and cleanup uses the same id.
    assert_eq!(target_report["Phases"]["Put"]["Status"], "OK", "{payload}");
-    assert_eq!(target_report["Phases"]["DeleteMarker"]["Status"], "SKIPPED", "{payload}");
+    assert_eq!(target_report["Phases"]["DeleteMarker"]["Status"], "OK", "{payload}");
+    assert_eq!(target_report["Phases"]["VersionDelete"]["Status"], "OK", "{payload}");
    assert_eq!(target_report["Phases"]["Cleanup"]["Status"], "OK", "{payload}");

    // The probe PUT must carry the source version as `?versionId=` — the
@@ -9945,3 +10190,199 @@ async fn test_get_object_tagging_proxies_unreplicated_object_to_replication_targ
    target.shutdown().await;
    Ok(())
 }
+
+// ---------------------------------------------------------------------------
+// backlog#2363
+// ---------------------------------------------------------------------------
+
+/// Wait until the source reports a terminal replication status for `key`.
+async fn wait_terminal_replication_status(
+    client: &Client,
+    bucket: &str,
+    key: &str,
+    ssec: bool,
+    timeout: Duration,
+) -> Result<String, Box<dyn Error + Send + Sync>> {
+    let customer_key = BASE64_STANDARD.encode_to_string(REPL17_SSEC_KEY);
+    let customer_key_md5 = sse_customer_key_md5_base64(REPL17_SSEC_KEY);
+    let deadline = tokio::time::Instant::now() + timeout;
+    loop {
+        let request = client.head_object().bucket(bucket).key(key);
+        let head = if ssec {
+            request
+                .sse_customer_algorithm("AES256")
+                .sse_customer_key(&customer_key)
+                .sse_customer_key_md5(&customer_key_md5)
+                .send()
+                .await?
+        } else {
+            request.send().await?
+        };
+        let status = head.replication_status().map(|status| status.as_str().to_string());
+        if matches!(status.as_deref(), Some("COMPLETED") | Some("FAILED")) {
+            return Ok(status.unwrap_or_default());
+        }
+        if tokio::time::Instant::now() >= deadline {
+            return Err(format!("{bucket}/{key}: replication never reached a terminal status; last {status:?}").into());
+        }
+        sleep(Duration::from_millis(250)).await;
+    }
+}
+
+/// backlog#2363: SSE-C ciphertext passthrough of objects the source stored
+/// compressed. The replica on a RustFS target must decrypt to the original
+/// bytes for a single PUT and for a multipart upload.
+#[tokio::test]
+async fn test_bucket_replication_sse_c_compressed_passthrough() -> TestResult {
+    init_logging();
+    const PART_SIZE: usize = 5 * 1024 * 1024;
+
+    let mut source_env = RustFSTestEnvironment::new().await?;
+    let mut target_env = RustFSTestEnvironment::new().await?;
+    let mut source_process_env = replication_fast_env();
+    source_process_env.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    source_process_env.extend_from_slice(FAST_SCANNER_ENV);
+    source_process_env.extend_from_slice(&[
+        ("NO_PROXY", "127.0.0.1,localhost"),
+        ("HTTP_PROXY", ""),
+        ("HTTPS_PROXY", ""),
+        ("RUSTFS_COMPRESSION_ENABLED", "true"),
+        ("RUSTFS_COMPRESSION_MULTIPART_ENABLED", "true"),
+    ]);
+    source_env.start_rustfs_server_with_env(vec![], &source_process_env).await?;
+    target_env
+        .start_rustfs_server_without_cleanup_with_env(&[
+            ("NO_PROXY", "127.0.0.1,localhost"),
+            ("HTTP_PROXY", ""),
+            ("HTTPS_PROXY", ""),
+        ])
+        .await?;
+
+    let source_bucket = "ssec-compressed-src";
+    let target_bucket = "ssec-compressed-dst";
+    let source_client = source_env.create_s3_client();
+    let target_client = target_env.create_s3_client();
+    source_client.create_bucket().bucket(source_bucket).send().await?;
+    target_client.create_bucket().bucket(target_bucket).send().await?;
+    enable_bucket_versioning(&source_env, source_bucket).await?;
+    enable_bucket_versioning(&target_env, target_bucket).await?;
+    let target_arn = set_replication_target(&source_env, source_bucket, &target_env, target_bucket).await?;
+    put_bucket_replication(&source_env, source_bucket, &target_arn).await?;
+
+    let customer_key = BASE64_STANDARD.encode_to_string(REPL17_SSEC_KEY);
+    let customer_key_md5 = sse_customer_key_md5_base64(REPL17_SSEC_KEY);
+    let text = |len: usize, seed: u32| -> Vec<u8> {
+        let mut out = Vec::with_capacity(len + 64);
+        let mut line = 0u64;
+        while out.len() < len {
+            out.extend_from_slice(format!("ssec compressed passthrough seed={seed} line={line} lorem ipsum dolor\n").as_bytes());
+            line += 1;
+        }
+        out.truncate(len);
+        out
+    };
+
+    let single_key = "ssec-compressed-single.txt";
+    let single_body = text(1024 * 1024 + 17, 1);
+    source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(single_key)
+        .content_type("text/plain")
+        .body(ByteStream::from(single_body.clone()))
+        .sse_customer_algorithm("AES256")
+        .sse_customer_key(&customer_key)
+        .sse_customer_key_md5(&customer_key_md5)
+        .send()
+        .await?;
+
+    let multipart_key = "ssec-compressed-multipart.txt";
+    let multipart_parts = [text(PART_SIZE, 2), text(1024 * 1024 + 4096, 3)];
+    let multipart_body: Vec<u8> = multipart_parts.concat();
+    let created = source_client
+        .create_multipart_upload()
+        .bucket(source_bucket)
+        .key(multipart_key)
+        .content_type("text/plain")
+        .sse_customer_algorithm("AES256")
+        .sse_customer_key(&customer_key)
+        .sse_customer_key_md5(&customer_key_md5)
+        .send()
+        .await?;
+    let upload_id = created.upload_id().ok_or("missing multipart upload id")?.to_string();
+    let mut completed = Vec::new();
+    for (index, part) in multipart_parts.iter().enumerate() {
+        let part_number = i32::try_from(index + 1)?;
+        let uploaded = source_client
+            .upload_part()
+            .bucket(source_bucket)
+            .key(multipart_key)
+            .upload_id(&upload_id)
+            .part_number(part_number)
+            .body(ByteStream::from(part.clone()))
+            .sse_customer_algorithm("AES256")
+            .sse_customer_key(&customer_key)
+            .sse_customer_key_md5(&customer_key_md5)
+            .send()
+            .await?;
+        completed.push(
+            CompletedPart::builder()
+                .part_number(part_number)
+                .set_e_tag(uploaded.e_tag().map(str::to_string))
+                .build(),
+        );
+    }
+    source_client
+        .complete_multipart_upload()
+        .bucket(source_bucket)
+        .key(multipart_key)
+        .upload_id(&upload_id)
+        .multipart_upload(CompletedMultipartUpload::builder().set_parts(Some(completed)).build())
+        .sse_customer_algorithm("AES256")
+        .sse_customer_key(&customer_key)
+        .sse_customer_key_md5(&customer_key_md5)
+        .send()
+        .await?;
+
+    let mut failures = Vec::new();
+    for (key, body) in [(single_key, &single_body), (multipart_key, &multipart_body)] {
+        let status = wait_terminal_replication_status(&source_client, source_bucket, key, true, Duration::from_secs(120)).await?;
+        if status != "COMPLETED" {
+            failures.push(format!("{key}: source reports {status}"));
+            continue;
+        }
+        let replica = target_client
+            .get_object()
+            .bucket(target_bucket)
+            .key(key)
+            .sse_customer_algorithm("AES256")
+            .sse_customer_key(&customer_key)
+            .sse_customer_key_md5(&customer_key_md5)
+            .send()
+            .await;
+        match replica {
+            Ok(replica) => {
+                let content_length = replica.content_length();
+                match replica.body.collect().await {
+                    Ok(collected) => {
+                        let bytes = collected.into_bytes();
+                        if bytes.as_ref() != body.as_slice() {
+                            failures.push(format!(
+                                "{key}: replica bytes differ (content_length={content_length:?}, got {} bytes, want {})",
+                                bytes.len(),
+                                body.len()
+                            ));
+                        }
+                    }
+                    Err(err) => failures.push(format!("{key}: replica body read failed: {err}")),
+                }
+            }
+            Err(err) => failures.push(format!("{key}: replica GET failed: {err}")),
+        }
+    }
+    assert!(
+        failures.is_empty(),
+        "SSE-C compressed passthrough replicas must decrypt to the source bytes: {failures:?}"
+    );
+    Ok(())
+}
@@ -31,17 +31,22 @@
 //! Adding a target behavior the fleet has shown: add the mode to the fake
 //! target, add a row here, and record any cell that is red before the fix.

-use crate::common::{RustFSTestEnvironment, init_logging, replication_fast_env};
-use crate::fake_s3_target::{FAKE_ACCESS_KEY, FAKE_SECRET_KEY};
-use crate::fake_s3_target::{FakeS3Target, Operation as FakeTargetOperation, RequestRecord};
-use crate::on_demand_migration::common::fake_source_client;
+use crate::common::{init_logging, replication_fast_env};
+use crate::fake_s3_target::{BucketMode, FAKE_ACCESS_KEY, FAKE_SECRET_KEY};
+use crate::fake_s3_target::{FakeS3Target, FaultAction as FakeTargetFault, Operation as FakeTargetOperation, RequestRecord};
+use crate::on_demand_migration::common::{OdmEnvOptions, OdmTestEnv, fake_source_client};
 use crate::replication_extension_test::{
-    LOOPBACK_REPLICATION_TARGET_ENV, ReplicationTargetOptions, enable_bucket_versioning, put_bucket_replication,
-    set_replication_target_with_options,
+    LOOPBACK_REPLICATION_TARGET_ENV, ReplicationTargetOptions, delete_bucket_replication, enable_bucket_versioning,
+    get_replication_reset_status, put_bucket_replication, put_bucket_replication_with_delete_statuses,
+    set_replication_target_with_options, start_bucket_replication_reset,
 };
 use aws_sdk_s3::Client;
+use aws_sdk_s3::error::ProvideErrorMetadata;
 use aws_sdk_s3::primitives::{ByteStream, DateTime};
-use aws_sdk_s3::types::{CompletedMultipartUpload, CompletedPart, ObjectLockLegalHoldStatus, ObjectLockMode};
+use aws_sdk_s3::types::{
+    Checksum, ChecksumAlgorithm, CompletedMultipartUpload, CompletedPart, ObjectAttributes, ObjectLockLegalHold,
+    ObjectLockLegalHoldStatus, ObjectLockMode, ObjectLockRetention, ObjectLockRetentionMode, Tag, Tagging,
+};
 use bytes::Bytes;
 use std::error::Error;
 use std::time::{SystemTime, UNIX_EPOCH};
@@ -63,7 +68,10 @@ enum TargetMode {
    /// Object Lock parameters must carry `Content-MD5` or `x-amz-checksum-*`.
    RequireChecksumWithObjectLock,
    /// AWS S3 / Wasabi / Impossible Cloud: mints its own version ids
-    /// (rustfs/backlog#2085). Data must still land.
+    /// (rustfs/backlog#2085) and, like Wasabi, answers NoSuchVersion to a
+    /// DELETE of an id it never had (rustfs/backlog#2340). Data must still
+    /// land, and every version-addressed mutation must resolve the replica
+    /// through the target-version ledger.
    MintOwnVersionIds,
 }

@@ -80,7 +88,10 @@ impl TargetMode {
            TargetMode::Baseline => {}
            TargetMode::RejectAwsChunked => target.reject_aws_chunked_uploads(true),
            TargetMode::RequireChecksumWithObjectLock => target.require_checksum_for_object_lock(true),
-            TargetMode::MintOwnVersionIds => target.assign_own_version_ids(true),
+            TargetMode::MintOwnVersionIds => {
+                target.assign_own_version_ids(true);
+                target.reject_unknown_version_deletes(true);
+            }
        }
    }

@@ -110,16 +121,23 @@ enum ObjectShape {
    /// Two-part multipart upload with a GOVERNANCE retention period; the
    /// lock headers travel on CreateMultipartUpload, which has no body.
    LockedMultipart,
+    /// ODM stores two local parts while preserving a single-PUT source's MD5 ETag.
+    OdmPreservedMd5Multipart,
+    /// Single-part object uploaded with `x-amz-checksum-sha256`; the replica
+    /// must carry the same header (rustfs/backlog#2340).
+    Checksummed,
 }

 impl ObjectShape {
-    const ALL: [ObjectShape; 6] = [
+    const ALL: [ObjectShape; 8] = [
        ObjectShape::Empty,
        ObjectShape::Plain,
        ObjectShape::Retention,
        ObjectShape::LegalHold,
        ObjectShape::Multipart,
        ObjectShape::LockedMultipart,
+        ObjectShape::OdmPreservedMd5Multipart,
+        ObjectShape::Checksummed,
    ];

    fn key(self) -> &'static str {
@@ -130,6 +148,17 @@ impl ObjectShape {
            ObjectShape::LegalHold => "matrix/legal-hold.bin",
            ObjectShape::Multipart => "matrix/multipart.bin",
            ObjectShape::LockedMultipart => "matrix/locked-multipart.bin",
+            ObjectShape::OdmPreservedMd5Multipart => "matrix/odm-preserved-md5.bin",
+            ObjectShape::Checksummed => "matrix/checksummed.bin",
+        }
+    }
+
+    /// The `x-amz-checksum-*` header the source stored and every upload of
+    /// the replica must repeat.
+    fn forwarded_checksum_header(self) -> Option<&'static str> {
+        match self {
+            ObjectShape::Checksummed => Some("x-amz-checksum-sha256"),
+            _ => None,
        }
    }

@@ -139,7 +168,8 @@ impl ObjectShape {

    /// Upload the shape to the source and return the bytes the target must
    /// end up holding.
-    async fn put(self, client: &Client, bucket: &str) -> Result<Bytes, Box<dyn Error + Send + Sync>> {
+    async fn put(self, env: &OdmTestEnv, bucket: &str) -> Result<Bytes, Box<dyn Error + Send + Sync>> {
+        let client = &env.client;
        let key = self.key();
        match self {
            ObjectShape::Empty => {
@@ -190,6 +220,19 @@ impl ObjectShape {
            }
            ObjectShape::Multipart => multipart_put(client, bucket, key, 0x44, false).await,
            ObjectShape::LockedMultipart => multipart_put(client, bucket, key, 0x55, true).await,
+            ObjectShape::OdmPreservedMd5Multipart => odm_preserved_md5_multipart(env, bucket, key).await,
+            ObjectShape::Checksummed => {
+                let body = payload(40 * 1024, 0x66);
+                client
+                    .put_object()
+                    .bucket(bucket)
+                    .key(key)
+                    .body(ByteStream::from(body.clone()))
+                    .checksum_algorithm(ChecksumAlgorithm::Sha256)
+                    .send()
+                    .await?;
+                Ok(body)
+            }
        }
    }
 }
@@ -219,6 +262,595 @@ fn expectation(mode: TargetMode, shape: ObjectShape) -> Expectation {
        .unwrap_or(Expectation::Completed)
 }

+/// rustfs/backlog#2340: a target that mints its own version ids (Wasabi,
+/// AWS S3) answers 404 to a HEAD by the source uuid, which the worker used to
+/// read as "replica missing" and re-drive the PUT — one more target version
+/// per heal, MRF retry or resync. Two re-drive shapes, both must converge on
+/// the single version the first PUT created:
+/// - the first PUT lands but its response is lost, so the object is FAILED
+///   and the scanner heal pass re-drives it;
+/// - an existing-object resync re-drives a COMPLETED object unconditionally.
+#[tokio::test]
+async fn matrix_mint_own_version_ids_redrive_does_not_duplicate() -> TestResult {
+    init_logging();
+
+    let target = FakeS3Target::start().await?;
+    let target_bucket = "matrix-mint-own-redrive-dst".to_string();
+    target.create_bucket_with_object_lock(target_bucket.clone());
+    target.assign_own_version_ids(true);
+
+    let mut env_vars = replication_fast_env();
+    env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    env_vars.extend_from_slice(&[
+        ("NO_PROXY", "127.0.0.1,localhost"),
+        ("HTTP_PROXY", ""),
+        ("HTTPS_PROXY", ""),
+        // The scanner heal pass is what re-drives a FAILED object.
+        ("RUSTFS_SCANNER_CYCLE", "1"),
+        ("RUSTFS_SCANNER_START_DELAY_SECS", "1"),
+    ]);
+    let env = OdmTestEnv::start_with(OdmEnvOptions {
+        env: env_vars,
+        ..OdmEnvOptions::default()
+    })
+    .await?;
+    let source_env = &env.rustfs;
+
+    let source_bucket = "matrix-mint-own-redrive-src";
+    let source_client = source_env.create_s3_client();
+    source_client
+        .create_bucket()
+        .bucket(source_bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+    enable_bucket_versioning(source_env, source_bucket).await?;
+    let target_arn = set_replication_target_with_options(
+        source_env,
+        source_bucket,
+        ReplicationTargetOptions {
+            endpoint: &target.address(),
+            access_key: FAKE_ACCESS_KEY,
+            secret_key: FAKE_SECRET_KEY,
+            target_bucket: &target_bucket,
+            secure: false,
+            skip_tls_verify: false,
+            ca_cert_pem: None,
+        },
+    )
+    .await?;
+    put_bucket_replication(source_env, source_bucket, &target_arn).await?;
+
+    // Teach the worker the target's identity contract with one ordinary
+    // write, exactly as production learns it (the PUT response carries the
+    // minted id).
+    let probe_key = "redrive/identity-probe.bin";
+    source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(probe_key)
+        .body(ByteStream::from(payload(4 * 1024, 0x01)))
+        .send()
+        .await?;
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, probe_key).await?,
+        "COMPLETED"
+    );
+
+    // Shape 1: the PUT is stored, its response never arrives, heal re-drives.
+    let heal_key = "redrive/heal.bin";
+    target.inject_for_key(FakeTargetOperation::PutObject, heal_key, FakeTargetFault::DisconnectAfterResponse, 1);
+    source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(heal_key)
+        .body(ByteStream::from(payload(8 * 1024, 0x02)))
+        .send()
+        .await?;
+    wait_for_replication_status_and_single_version(&source_client, source_bucket, &target, &target_bucket, heal_key).await?;
+
+    // Shape 2: an existing-object resync re-drives a COMPLETED object.
+    let resync_key = "redrive/resync.bin";
+    source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(resync_key)
+        .body(ByteStream::from(payload(8 * 1024, 0x03)))
+        .send()
+        .await?;
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, resync_key).await?,
+        "COMPLETED"
+    );
+    let (reset_arn, _reset_id) = start_bucket_replication_reset(source_env, source_bucket).await?;
+    assert_eq!(reset_arn, target_arn);
+    let resync = async {
+        loop {
+            let status = get_replication_reset_status(source_env, source_bucket, &target_arn).await?;
+            if let Some(entry) = status.targets.iter().find(|entry| entry.arn == target_arn)
+                && entry.status == "Completed"
+            {
+                return Ok::<_, Box<dyn Error + Send + Sync>>(entry.replicated_count);
+            }
+            sleep(Duration::from_millis(250)).await;
+        }
+    };
+    let replicated = timeout(Duration::from_secs(90), resync)
+        .await
+        .map_err(|_| "existing-object resync did not complete within 90 seconds")??;
+    assert!(replicated >= 3, "resync must count the located replicas as replicated, got {replicated}");
+    for key in [probe_key, heal_key, resync_key] {
+        let versions = target.stored_versions(&target_bucket, key);
+        assert_eq!(
+            versions.len(),
+            1,
+            "{key}: a re-drive against a target that mints its own version ids must not mint another one: {versions:?}"
+        );
+    }
+
+    target.shutdown().await;
+    Ok(())
+}
+
+/// rustfs/backlog#2340 (target-version ledger): on a target that mints its own
+/// version ids and answers NoSuchVersion to an unknown id (the Wasabi shape),
+/// every version-addressed mutation must land on the version the target
+/// assigned, which the replication PUT recorded on the source:
+/// - a tag update changes the existing target version, no new version;
+/// - a retention extension and legal hold ON/OFF change that version too;
+/// - a permanent delete of the older of two same-content generations removes
+///   exactly that replica and keeps the live one (content identity alone
+///   could not tell them apart).
+#[tokio::test]
+async fn matrix_mint_own_version_ids_addresses_mutations_through_the_ledger() -> TestResult {
+    init_logging();
+
+    let target = FakeS3Target::start().await?;
+    let target_bucket = "matrix-mint-own-ledger-dst".to_string();
+    target.create_bucket_with_object_lock(target_bucket.clone());
+    TargetMode::MintOwnVersionIds.apply(&target);
+
+    let mut env_vars = replication_fast_env();
+    env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    env_vars.extend_from_slice(&[
+        ("NO_PROXY", "127.0.0.1,localhost"),
+        ("HTTP_PROXY", ""),
+        ("HTTPS_PROXY", ""),
+        // The scanner heal pass retries a purge the first attempt lost.
+        ("RUSTFS_SCANNER_CYCLE", "1"),
+        ("RUSTFS_SCANNER_START_DELAY_SECS", "1"),
+    ]);
+    let env = OdmTestEnv::start_with(OdmEnvOptions {
+        env: env_vars,
+        ..OdmEnvOptions::default()
+    })
+    .await?;
+    let source_env = &env.rustfs;
+
+    let source_bucket = "matrix-mint-own-ledger-src";
+    let source_client = source_env.create_s3_client();
+    source_client
+        .create_bucket()
+        .bucket(source_bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+    enable_bucket_versioning(source_env, source_bucket).await?;
+    let target_arn = set_replication_target_with_options(
+        source_env,
+        source_bucket,
+        ReplicationTargetOptions {
+            endpoint: &target.address(),
+            access_key: FAKE_ACCESS_KEY,
+            secret_key: FAKE_SECRET_KEY,
+            target_bucket: &target_bucket,
+            secure: false,
+            skip_tls_verify: false,
+            ca_cert_pem: None,
+        },
+    )
+    .await?;
+    put_bucket_replication_with_delete_statuses(source_env, source_bucket, &target_arn, "Enabled", Some("Enabled")).await?;
+    let target_client = fake_source_client(&target);
+
+    // Tag update on an existing version.
+    let tag_key = "ledger/tags.bin";
+    let tagged = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(tag_key)
+        .body(ByteStream::from(payload(4 * 1024, 0x01)))
+        .send()
+        .await?;
+    let tag_source_version = tagged.version_id().ok_or("source PUT returned no version id")?.to_string();
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, tag_key).await?,
+        "COMPLETED"
+    );
+    let tag_target_version = single_target_version(&target, &target_bucket, tag_key)?;
+    source_client
+        .put_object_tagging()
+        .bucket(source_bucket)
+        .key(tag_key)
+        .version_id(&tag_source_version)
+        .tagging(
+            Tagging::builder()
+                .tag_set(Tag::builder().key("phase").value("after").build()?)
+                .build()?,
+        )
+        .send()
+        .await?;
+    wait_until("tag update on the existing target version", || async {
+        let tags = target_client
+            .get_object_tagging()
+            .bucket(&target_bucket)
+            .key(tag_key)
+            .version_id(&tag_target_version)
+            .send()
+            .await?;
+        Ok(tags
+            .tag_set()
+            .iter()
+            .any(|tag| tag.key() == "phase" && tag.value() == "after"))
+    })
+    .await?;
+    assert_stable_single_version(&target, &target_bucket, tag_key, &tag_target_version).await?;
+
+    // Retention extension and legal hold on an existing version.
+    let lock_key = "ledger/lock.bin";
+    let locked = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(lock_key)
+        .body(ByteStream::from(payload(4 * 1024, 0x02)))
+        .object_lock_mode(ObjectLockMode::Governance)
+        .object_lock_retain_until_date(retain_until())
+        .send()
+        .await?;
+    let lock_source_version = locked.version_id().ok_or("source PUT returned no version id")?.to_string();
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, lock_key).await?,
+        "COMPLETED"
+    );
+    let lock_target_version = single_target_version(&target, &target_bucket, lock_key)?;
+    let extended = DateTime::from_secs(retain_until().secs() + 86_400);
+    source_client
+        .put_object_retention()
+        .bucket(source_bucket)
+        .key(lock_key)
+        .version_id(&lock_source_version)
+        .retention(
+            ObjectLockRetention::builder()
+                .mode(ObjectLockRetentionMode::Governance)
+                .retain_until_date(extended)
+                .build(),
+        )
+        .send()
+        .await?;
+    source_client
+        .put_object_legal_hold()
+        .bucket(source_bucket)
+        .key(lock_key)
+        .version_id(&lock_source_version)
+        .legal_hold(ObjectLockLegalHold::builder().status(ObjectLockLegalHoldStatus::On).build())
+        .send()
+        .await?;
+    wait_until("retention extension and legal hold on the existing target version", || async {
+        let head = target_client
+            .head_object()
+            .bucket(&target_bucket)
+            .key(lock_key)
+            .version_id(&lock_target_version)
+            .send()
+            .await?;
+        Ok(head.object_lock_retain_until_date().map(|date| date.secs()) == Some(extended.secs())
+            && head.object_lock_legal_hold_status() == Some(&ObjectLockLegalHoldStatus::On))
+    })
+    .await?;
+    source_client
+        .put_object_legal_hold()
+        .bucket(source_bucket)
+        .key(lock_key)
+        .version_id(&lock_source_version)
+        .legal_hold(ObjectLockLegalHold::builder().status(ObjectLockLegalHoldStatus::Off).build())
+        .send()
+        .await?;
+    wait_until("legal hold removal on the existing target version", || async {
+        let head = target_client
+            .head_object()
+            .bucket(&target_bucket)
+            .key(lock_key)
+            .version_id(&lock_target_version)
+            .send()
+            .await?;
+        Ok(head.object_lock_legal_hold_status() == Some(&ObjectLockLegalHoldStatus::Off))
+    })
+    .await?;
+    assert_stable_single_version(&target, &target_bucket, lock_key, &lock_target_version).await?;
+
+    // Permanent delete of the older of two same-content generations.
+    let generations_key = "ledger/generations.bin";
+    let body = payload(4 * 1024, 0x03);
+    let older = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(generations_key)
+        .body(ByteStream::from(body.clone()))
+        .send()
+        .await?;
+    let older_version = older.version_id().ok_or("source PUT returned no version id")?.to_string();
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, generations_key).await?,
+        "COMPLETED"
+    );
+    let older_replica = single_target_version(&target, &target_bucket, generations_key)?;
+    source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(generations_key)
+        .body(ByteStream::from(body))
+        .send()
+        .await?;
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, generations_key).await?,
+        "COMPLETED"
+    );
+    wait_until("both generations replicated", || async {
+        Ok(target.stored_versions(&target_bucket, generations_key).len() == 2)
+    })
+    .await?;
+    let newer_replica = target
+        .stored_versions(&target_bucket, generations_key)
+        .into_iter()
+        .map(|(version_id, _)| version_id)
+        .find(|version_id| version_id != &older_replica)
+        .ok_or("the second generation must have its own target version")?;
+
+    source_client
+        .delete_object()
+        .bucket(source_bucket)
+        .key(generations_key)
+        .version_id(&older_version)
+        .send()
+        .await?;
+    wait_until("permanent delete of the older generation's replica", || async {
+        let versions: Vec<String> = target
+            .stored_versions(&target_bucket, generations_key)
+            .into_iter()
+            .map(|(version_id, _)| version_id)
+            .collect();
+        Ok(versions == [newer_replica.clone()])
+    })
+    .await?;
+    assert_stable_single_version(&target, &target_bucket, generations_key, &newer_replica).await?;
+
+    // No mutation above may have gone out as a re-PUT: one upload per key.
+    for key in [tag_key, lock_key] {
+        let puts = target
+            .requests()
+            .iter()
+            .filter(|record| record.key.as_deref() == Some(key) && record.operation == FakeTargetOperation::PutObject)
+            .count();
+        assert_eq!(
+            puts, 1,
+            "{key}: a metadata update must not re-PUT the object on a target that mints its own ids"
+        );
+    }
+
+    target.shutdown().await;
+    Ok(())
+}
+
+/// rustfs/backlog#2340 (pending purge lifecycle): a permanent delete whose
+/// replication keeps failing leaves the version in xl.meta as a PENDING purge,
+/// hidden from listings. Once the bucket's replication configuration is
+/// removed nothing can ever confirm that purge remotely, so the delete worker
+/// must settle it locally (abandoned, with the replica left on the former
+/// target) — otherwise the bucket stays `BucketNotEmpty` forever with a
+/// residue the client cannot see.
+#[tokio::test]
+async fn matrix_removed_replication_config_abandons_pending_purge() -> TestResult {
+    init_logging();
+
+    let target = FakeS3Target::start().await?;
+    let target_bucket = "matrix-abandoned-purge-dst".to_string();
+    target.create_bucket_with_object_lock(target_bucket.clone());
+    TargetMode::MintOwnVersionIds.apply(&target);
+
+    let mut env_vars = replication_fast_env();
+    env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
+    env_vars.extend_from_slice(&[
+        ("NO_PROXY", "127.0.0.1,localhost"),
+        ("HTTP_PROXY", ""),
+        ("HTTPS_PROXY", ""),
+        // The scanner heal pass is what revisits a pending purge.
+        ("RUSTFS_SCANNER_CYCLE", "1"),
+        ("RUSTFS_SCANNER_START_DELAY_SECS", "1"),
+    ]);
+    let env = OdmTestEnv::start_with(OdmEnvOptions {
+        env: env_vars,
+        ..OdmEnvOptions::default()
+    })
+    .await?;
+    let source_env = &env.rustfs;
+
+    let source_bucket = "matrix-abandoned-purge-src";
+    let source_client = source_env.create_s3_client();
+    source_client
+        .create_bucket()
+        .bucket(source_bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+    enable_bucket_versioning(source_env, source_bucket).await?;
+    let target_arn = set_replication_target_with_options(
+        source_env,
+        source_bucket,
+        ReplicationTargetOptions {
+            endpoint: &target.address(),
+            access_key: FAKE_ACCESS_KEY,
+            secret_key: FAKE_SECRET_KEY,
+            target_bucket: &target_bucket,
+            secure: false,
+            skip_tls_verify: false,
+            ca_cert_pem: None,
+        },
+    )
+    .await?;
+    put_bucket_replication_with_delete_statuses(source_env, source_bucket, &target_arn, "Enabled", Some("Enabled")).await?;
+
+    let key = "purge/orphaned.bin";
+    let put = source_client
+        .put_object()
+        .bucket(source_bucket)
+        .key(key)
+        .body(ByteStream::from(payload(4 * 1024, 0x07)))
+        .send()
+        .await?;
+    let source_version = put.version_id().ok_or("source PUT returned no version id")?.to_string();
+    assert_eq!(
+        wait_for_terminal_replication_status(&source_client, source_bucket, key).await?,
+        "COMPLETED"
+    );
+    let replica = single_target_version(&target, &target_bucket, key)?;
+
+    // The target refuses every purge: the version stays a pending purge.
+    // More refusals than any scanner cycle can consume within the test.
+    target.inject_for_key(FakeTargetOperation::DeleteObject, key, FakeTargetFault::ResponseStatus(503), 4_000);
+    source_client
+        .delete_object()
+        .bucket(source_bucket)
+        .key(key)
+        .version_id(&source_version)
+        .send()
+        .await?;
+    wait_until("the refused purge to reach the target at least once", || async {
+        Ok(target.count_requests(FakeTargetOperation::DeleteObject, key) >= 1)
+    })
+    .await?;
+    let listed = source_client.list_object_versions().bucket(source_bucket).send().await?;
+    assert!(
+        listed.versions().is_empty() && listed.delete_markers().is_empty(),
+        "a pending purge is hidden from listings: {listed:?}"
+    );
+    let blocked = source_client.delete_bucket().bucket(source_bucket).send().await;
+    assert!(
+        blocked
+            .as_ref()
+            .err()
+            .and_then(|err| err.as_service_error())
+            .is_some_and(|err| err.code() == Some("BucketNotEmpty")),
+        "the hidden pending purge must block DeleteBucket while the target is still configured: {blocked:?}"
+    );
+
+    // Removing the replication configuration orphans the purge; the scanner
+    // heal pass must settle it locally so the bucket becomes deletable.
+    let response = delete_bucket_replication(source_env, source_bucket).await?;
+    assert!(response.status().is_success(), "DeleteBucketReplication: {}", response.status());
+    wait_until("DeleteBucket to succeed once the orphaned purge is abandoned", || async {
+        match source_client.delete_bucket().bucket(source_bucket).send().await {
+            Ok(_) => Ok(true),
+            Err(err) if err.as_service_error().is_some_and(|err| err.code() == Some("BucketNotEmpty")) => Ok(false),
+            Err(err) => Err(err.into()),
+        }
+    })
+    .await?;
+    // Abandoned means abandoned: the replica stays on the former target and,
+    // once the attempts in flight at removal time have drained, no further
+    // purge attempts are sent to it.
+    assert_eq!(
+        single_target_version(&target, &target_bucket, key)?,
+        replica,
+        "an abandoned purge must not touch the replica on the former target"
+    );
+    sleep(Duration::from_secs(3)).await;
+    let settled = target.count_requests(FakeTargetOperation::DeleteObject, key);
+    sleep(Duration::from_secs(3)).await;
+    assert_eq!(
+        target.count_requests(FakeTargetOperation::DeleteObject, key),
+        settled,
+        "purge attempts must stop once the target is no longer configured"
+    );
+
+    target.shutdown().await;
+    Ok(())
+}
+
+fn single_target_version(target: &FakeS3Target, target_bucket: &str, key: &str) -> Result<String, Box<dyn Error + Send + Sync>> {
+    let versions = target.stored_versions(target_bucket, key);
+    match versions.as_slice() {
+        [(version_id, false)] => Ok(version_id.clone()),
+        other => Err(format!("{key}: expected exactly one live target version, got {other:?}").into()),
+    }
+}
+
+/// The target keeps holding exactly `version_id` for a few scanner cycles: a
+/// re-driven PUT or a wrong delete would show up here.
+async fn assert_stable_single_version(target: &FakeS3Target, target_bucket: &str, key: &str, version_id: &str) -> TestResult {
+    for _ in 0..8 {
+        let versions = target.stored_versions(target_bucket, key);
+        if versions.len() != 1 || versions[0].0 != version_id {
+            return Err(
+                format!("{key}: target versions drifted from the single expected replica {version_id}: {versions:?}").into(),
+            );
+        }
+        sleep(Duration::from_millis(500)).await;
+    }
+    Ok(())
+}
+
+async fn wait_until<F, Fut>(what: &str, mut probe: F) -> TestResult
+where
+    F: FnMut() -> Fut,
+    Fut: std::future::Future<Output = Result<bool, Box<dyn Error + Send + Sync>>>,
+{
+    let wait = async {
+        loop {
+            if probe().await? {
+                return Ok::<_, Box<dyn Error + Send + Sync>>(());
+            }
+            sleep(Duration::from_millis(250)).await;
+        }
+    };
+    timeout(Duration::from_secs(90), wait)
+        .await
+        .map_err(|_| format!("{what} did not happen within 90 seconds"))?
+}
+
+/// Wait until `key` is COMPLETED on the source and, for the observation
+/// window after that, the target still holds exactly one live version of it.
+async fn wait_for_replication_status_and_single_version(
+    source_client: &Client,
+    source_bucket: &str,
+    target: &FakeS3Target,
+    target_bucket: &str,
+    key: &str,
+) -> TestResult {
+    // The lost PUT response first settles the object FAILED; only the next
+    // scanner heal pass can turn that into COMPLETED, so FAILED is transient
+    // here and the wait is for COMPLETED alone.
+    let converged = async {
+        loop {
+            let head = source_client.head_object().bucket(source_bucket).key(key).send().await?;
+            if head.replication_status().is_some_and(|status| status.as_str() == "COMPLETED") {
+                return Ok::<_, Box<dyn Error + Send + Sync>>(());
+            }
+            sleep(Duration::from_millis(250)).await;
+        }
+    };
+    timeout(Duration::from_secs(90), converged)
+        .await
+        .map_err(|_| format!("{key}: heal re-drive did not converge to COMPLETED within 90 seconds"))??;
+    // The heal pass keeps visiting the key for a few scanner cycles; a
+    // duplicate would show up here as a second stored version.
+    for _ in 0..12 {
+        let versions = target.stored_versions(target_bucket, key);
+        assert_eq!(versions.len(), 1, "{key}: target minted another version on re-drive: {versions:?}");
+        sleep(Duration::from_millis(500)).await;
+    }
+    Ok(())
+}
+
 #[tokio::test]
 async fn matrix_baseline_target() -> TestResult {
    run_row(TargetMode::Baseline).await
@@ -270,11 +902,15 @@ async fn run_row(mode: TargetMode) -> TestResult {
    target.create_bucket_with_object_lock(target_bucket.clone());
    mode.apply(&target);

-    let mut source_env = RustFSTestEnvironment::new().await?;
    let mut env_vars = replication_fast_env();
    env_vars.extend_from_slice(LOOPBACK_REPLICATION_TARGET_ENV);
    env_vars.extend_from_slice(&[("NO_PROXY", "127.0.0.1,localhost"), ("HTTP_PROXY", ""), ("HTTPS_PROXY", "")]);
-    source_env.start_rustfs_server_with_env(vec![], &env_vars).await?;
+    let env = OdmTestEnv::start_with(OdmEnvOptions {
+        env: env_vars,
+        ..OdmEnvOptions::default()
+    })
+    .await?;
+    let source_env = &env.rustfs;

    let source_bucket = format!("matrix-{}-src", mode.slug());
    let source_client = source_env.create_s3_client();
@@ -284,9 +920,9 @@ async fn run_row(mode: TargetMode) -> TestResult {
        .object_lock_enabled_for_bucket(true)
        .send()
        .await?;
-    enable_bucket_versioning(&source_env, &source_bucket).await?;
+    enable_bucket_versioning(source_env, &source_bucket).await?;
    let target_arn = set_replication_target_with_options(
-        &source_env,
+        source_env,
        &source_bucket,
        ReplicationTargetOptions {
            endpoint: &target.address(),
@@ -299,14 +935,21 @@ async fn run_row(mode: TargetMode) -> TestResult {
        },
    )
    .await?;
-    put_bucket_replication(&source_env, &source_bucket, &target_arn).await?;
+    put_bucket_replication(source_env, &source_bucket, &target_arn).await?;

    let target_client = fake_source_client(&target);
    let mut failures = Vec::new();
    for shape in ObjectShape::ALL {
        let cell = format!("{}/{:?}", mode.slug(), shape);
-        let expected_body = shape.put(&source_client, &source_bucket).await?;
+        let expected_body = shape.put(&env, &source_bucket).await?;
        let status = wait_for_terminal_replication_status(&source_client, &source_bucket, shape.key()).await?;
+        if shape == ObjectShape::OdmPreservedMd5Multipart {
+            assert_eq!(
+                env.source.count_requests(FakeTargetOperation::GetObject, shape.key()),
+                2,
+                "one passthrough GET plus one background pull; replication must read the persisted local parts"
+            );
+        }
        let journal = target.requests();
        let outcome = match expectation(mode, shape) {
            Expectation::Completed => {
@@ -379,6 +1022,36 @@ async fn check_completed_cell(
    if uploads.is_empty() {
        return Err("no upload reached the target although the source reports COMPLETED".into());
    }
+    if shape == ObjectShape::OdmPreservedMd5Multipart {
+        let key_requests: Vec<_> = journal
+            .iter()
+            .filter(|record| record.key.as_deref() == Some(shape.key()))
+            .collect();
+        for operation in [
+            FakeTargetOperation::CreateMultipartUpload,
+            FakeTargetOperation::CompleteMultipartUpload,
+        ] {
+            if !key_requests.iter().any(|record| record.operation == operation) {
+                return Err(format!("preserved-MD5 multipart object did not use {operation:?}").into());
+            }
+        }
+        if key_requests
+            .iter()
+            .any(|record| record.operation == FakeTargetOperation::PutObject)
+        {
+            return Err("preserved-MD5 multipart object used a single PutObject".into());
+        }
+        let mut part_numbers: Vec<_> = key_requests
+            .iter()
+            .filter(|record| record.operation == FakeTargetOperation::UploadPart)
+            .map(|record| record.part_number)
+            .collect();
+        part_numbers.sort_unstable();
+        part_numbers.dedup();
+        if part_numbers != [Some(1), Some(2)] {
+            return Err(format!("preserved-MD5 multipart object uploaded unexpected parts: {part_numbers:?}").into());
+        }
+    }
    if let Some(framed) = uploads.iter().find(|record| record.transport.aws_chunked) {
        return Err(format!("{cell}: an upload went out aws-chunked (rustfs#6853 framing): {framed:?}").into());
    }
@@ -401,6 +1074,19 @@ async fn check_completed_cell(
    }) {
        return Err(format!("a locked PutObject went out without any integrity header (rustfs#7082): {bare:?}").into());
    }
+    // rustfs/backlog#2340 contract: a source checksum reaches the target as
+    // the `x-amz-checksum-*` header, not as user metadata; every PutObject of
+    // the shape carries it.
+    if let Some(header) = shape.forwarded_checksum_header()
+        && let Some(missing) = uploads.iter().find(|record| {
+            record.operation == FakeTargetOperation::PutObject
+                && !record.transport.checksum_headers.iter().any(|name| name == header)
+        })
+    {
+        return Err(
+            format!("a PutObject went out without the source's {header} header (rustfs/backlog#2340): {missing:?}").into(),
+        );
+    }
    Ok(())
 }

@@ -455,6 +1141,71 @@ async fn wait_for_terminal_replication_status(
    }
 }

+async fn odm_preserved_md5_multipart(env: &OdmTestEnv, bucket: &str, key: &str) -> Result<Bytes, Box<dyn Error + Send + Sync>> {
+    const PART_SIZE: usize = 5 * 1024 * 1024;
+    let origin_bucket = format!("{bucket}-origin");
+    env.source.create_bucket_with_mode(&origin_bucket, BucketMode::Unversioned);
+    let mut spec = env.fake_source_spec(&origin_bucket);
+    // Below the 16 MiB inline default the pull is one tee'd PUT with a single
+    // part; force the passthrough + background multipart write-back instead.
+    spec.policy.inline_max_bytes = 4096;
+    spec.policy.multipart_part_size_bytes = PART_SIZE as u64;
+    spec.policy.preserve_etag = true;
+    env.configure_and_wait(bucket, &spec).await?;
+
+    // A normal source PUT produces the MD5 ETag; only ODM chooses the local parts.
+    let body = payload(PART_SIZE + 4096, 0x66);
+    let source_put = env
+        .source_client()
+        .put_object()
+        .bucket(&origin_bucket)
+        .key(key)
+        .body(ByteStream::from(body.clone()))
+        .send()
+        .await?;
+    let source_etag = source_put.e_tag().ok_or("source PUT omitted its ETag")?.trim_matches('"');
+    assert_eq!(source_etag.len(), 32, "source fixture must have a single-PUT MD5 ETag");
+    assert!(source_etag.bytes().all(|byte| byte.is_ascii_hexdigit()));
+
+    let pulled = env.raw_get(bucket, key).await?;
+    assert_eq!(pulled.status, 200, "{}", String::from_utf8_lossy(&pulled.body));
+    assert_eq!(pulled.body, body);
+    assert!(
+        env.wait_local_listed(bucket, key, Duration::from_secs(30)).await?,
+        "ODM must persist the object"
+    );
+    let attributes = env
+        .client
+        .get_object_attributes()
+        .bucket(bucket)
+        .key(key)
+        .object_attributes(ObjectAttributes::Etag)
+        .object_attributes(ObjectAttributes::ObjectParts)
+        .object_attributes(ObjectAttributes::Checksum)
+        .send()
+        .await?;
+    assert_eq!(attributes.e_tag().map(|etag| etag.trim_matches('"')), Some(source_etag));
+    let parts = attributes
+        .object_parts()
+        .ok_or("the ODM copy must expose its two local parts")?;
+    assert_eq!(parts.total_parts_count(), Some(2));
+    assert_eq!(
+        parts
+            .parts()
+            .iter()
+            .map(|part| (part.part_number(), part.size()))
+            .collect::<Vec<_>>(),
+        [(Some(1), Some(PART_SIZE as i64)), (Some(2), Some(4096))]
+    );
+    assert!(
+        attributes
+            .checksum()
+            .is_none_or(|checksum| checksum == &Checksum::builder().build()),
+        "multipart routing must work without an object checksum record"
+    );
+    Ok(body)
+}
+
 async fn multipart_put(
    client: &Client,
    bucket: &str,
@@ -31,6 +31,7 @@ workspace = true

 [features]
 default = []
+gcs = ["dep:google-cloud-storage", "dep:google-cloud-auth"]
 # Compiles the controlled list-objects namespace-journal chaos injector into a
 # production binary (it is always available to tests). Off by default so the
 # RUSTFS_LIST_OBJECTS_NAMESPACE_JOURNAL_CHAOS_* env vars cannot rewrite journal
@@ -212,8 +213,8 @@ aws-smithy-runtime-api = { workspace = true, features = ["http-1x"] }
 parking_lot = { workspace = true }
 base64-simd.workspace = true
 serde_urlencoded.workspace = true
-google-cloud-storage = { workspace = true }
-google-cloud-auth = { workspace = true }
+google-cloud-storage = { workspace = true, optional = true }
+google-cloud-auth = { workspace = true, optional = true }
 faster-hex = { workspace = true }
 ratelimit = { workspace = true }
 aws-smithy-http-client = { workspace = true, default-features = false, features = ["rustls-aws-lc"] }
@@ -225,7 +226,7 @@ metrics = { workspace = true }
 # crates.io. The guard scripts/check_no_tokio_io_uring.sh allows an explicit
 # io-uring integration; only the tokio "io-uring" runtime feature is banned.
 [target.'cfg(target_os = "linux")'.dependencies]
-rustfs-uring = "0.2.1"
+rustfs-uring = "0.2.2"

 [target.'cfg(windows)'.dependencies]
 winapi-util.workspace = true
@@ -32,7 +32,8 @@ pub mod bucket {
    pub mod bucket_target_sys {
        pub use crate::bucket::bucket_target_sys::{
            AdvancedPutOptions, BucketTargetError, BucketTargetSys, PutObjectOptions, RemoveObjectOptions, S3ClientError,
-            SsecPassthroughCapability, TargetClient, append_version_id_query,
+            SsecPassthroughCapability, TargetClient, VersionIdentityCapability, append_version_id_query,
+            resolve_delete_api_version_id,
        };
    }

@@ -69,11 +70,33 @@ pub mod bucket {
            };
        }

+        pub mod recovery_control {
+            pub use crate::bucket::lifecycle::recovery_control::{
+                IlmRecoveryClassification, IlmRecoveryControlPage, IlmRecoveryControlView, IlmRecoveryProtocol,
+                inspect_recovery_control, list_recovery_controls,
+            };
+        }
+
+        pub mod recovery_disposition {
+            pub use crate::bucket::lifecycle::recovery_disposition::{
+                IlmRecoveryDispositionExecutionOutcome, IlmRecoveryDispositionReasonCode, IlmRecoveryDispositionState,
+                dry_run_recovery_disposition, execute_recovery_disposition,
+            };
+        }
+
+        pub mod recovery_export {
+            pub use crate::bucket::lifecycle::recovery_export::{
+                IlmRecoveryExportCreated, IlmRecoveryExportObservation, create_recovery_export,
+                inspect_recovery_export_observation, load_recovery_export,
+            };
+        }
+
        pub mod transition_transaction {
            pub use crate::bucket::lifecycle::transition_transaction::{
                TransitionOperatorDeleteResult, TransitionOperatorError, TransitionOperatorProbe, TransitionOperatorStatus,
-                delete_transition_candidate_for_operator, finalize_missing_transition_transaction_for_operator,
-                inspect_transition_transaction_for_operator,
+                TransitionRecoveryRetryResult, TransitionRecoveryRetryStatus, delete_transition_candidate_for_operator,
+                finalize_missing_transition_transaction_for_operator, inspect_transition_recovery_retry_for_operator,
+                inspect_transition_transaction_for_operator, retry_transition_recovery_for_operator,
            };
            #[cfg(feature = "test-util")]
            pub use crate::bucket::lifecycle::transition_transaction::{
@@ -89,8 +112,9 @@ pub mod bucket {
        #[allow(clippy::module_inception)]
        pub mod lifecycle {
            pub use crate::bucket::lifecycle::lifecycle::{
-                Event, ExpirationOptions, IlmAction, Lifecycle, LifecycleCalculate, ObjectOpts, RuleValidate,
-                TRANSITION_COMPLETE, TRANSITION_PENDING, TransitionOptions, expected_expiry_time, object_opts_from_object_info,
+                Event, ExpirationOptions, IlmAction, LIFECYCLE_MALFORMED_XML_ERROR_KIND, Lifecycle, LifecycleCalculate,
+                ObjectOpts, RuleValidate, TRANSITION_COMPLETE, TRANSITION_PENDING, TransitionOptions, expected_expiry_time,
+                object_opts_from_object_info,
            };
        }

@@ -146,67 +170,25 @@ pub mod bucket {
        };
    }

-    pub mod on_demand_migration {
-        pub use crate::bucket::on_demand_migration::{
-            ApplyOutcome, BREAKER_FAILURE_THRESHOLD, BREAKER_FAILURE_WINDOW, BREAKER_HALF_OPEN_MAX_PROBES, BREAKER_OPEN_DURATION,
-            Breaker, BreakerState, BreakerTransition, BreakerVerdict, BucketOdmState, GLOBAL_ON_DEMAND_MIGRATION_SYS, GaugeGuard,
-            LastSourceError, LatencyBucketSnapshot, NEGATIVE_CACHE_MAX_ENTRIES, NegativeCache, OdmBucketSnapshot, OdmLookup,
-            OdmOp, OdmOutcome, OdmStateError, OdmStats, OdmStatsSnapshot, OnDemandMigrationSys, PullError, PullFailureReason,
-            PullFollower, PullLeader, PullOutcome, PullPath, PullResult, PullSlot, SOURCE_LATENCY_BUCKET_BOUNDS_MS,
-            SourceLatencySnapshot, source_client_spec,
-        };
-        pub use crate::bucket::on_demand_migration::{
-            ConfigPublishHook, FilterConfig, HeadPolicy, ON_DEMAND_MIGRATION_CONFIG_HOOK, ON_DEMAND_MIGRATION_CONFIG_VERSION,
-            OnDemandMigrationConfig, OnDemandMigrationConfigError, PathStyle, PolicyConfig, Provider, RangeGetPolicy,
-            SourceConfig, SourceCredentials, SourceErrorPolicy, SourceTimeout, TlsConfig, ValidationContext,
-        };
-        pub use crate::bucket::on_demand_migration::{
-            EnqueueOutcome, LocalObject, MAX_MULTIPART_PARTS, OdmWriteBack, PULL_MAX_RETRIES, PULL_RETRY_BASE_DELAYS,
-            PullCompletion, PullQueue, PullReason, PullSource, QueuedPullOutcome, SourceBody, SourceIdleGuard, WriteBackBody,
-            WriteBackError, WriteBackOutcome, WriteBackPart, WriteBackRequest, commit_inline, commit_inline_with,
-            idle_guarded_body,
-        };
-        pub use crate::bucket::on_demand_migration::{
-            FetchRequest, LIST_THROUGH_TOKEN_VERSION, ListEntryKey, ListThroughCursor, ListThroughMerger, ListThroughToken,
-            ListThroughTokenError, MAX_LIST_FETCHES_PER_SIDE, MergeOutcome, MergePick, MergeSide, SOURCE_LIST_MAX_RATE_WAIT,
-            SOURCE_LIST_RATE_PER_SEC, SourceListPlan, SourceListRateLimiter, decode_continuation_token, source_list_plan,
-        };
-        pub mod backfill {
-            pub use crate::bucket::on_demand_migration::backfill::{
-                BACKFILL_CHECKPOINT_FILE, BACKFILL_CHECKPOINT_FORMAT_VERSION, BACKFILL_FAILED_KEYS_CAPACITY, BACKFILL_LEASE,
-                BACKFILL_LEASE_LOCK_PREFIX, BACKFILL_LIST_PAGE_SIZE, BACKFILL_RECOVERY_INTERVAL, BACKFILL_SAVE_EVERY_KEYS,
-                BACKFILL_SAVE_INTERVAL, BackfillCheckpoint, BackfillContext, BackfillContextFactory, BackfillError,
-                BackfillLastError, BackfillOwner, BackfillRecoveryStats, BackfillRequest, BackfillRunner, BackfillState,
-                BucketBackfillContext, LocalBackfillObject, PriorityPullPermits, PullPermit, PullPriority, SkipExisting,
-                StoredCheckpoint, SysBackfillContexts, global_backfill_runner, install_global_backfill_runner, key_hash,
-                read_checkpoint, run_backfill_recovery_loop, spawn_backfill_recovery_loop,
-            };
-        }
-        pub mod source_client {
-            pub use crate::bucket::on_demand_migration::source_client::{
-                SourceClient, SourceClientSpec, SourceError, SourceGet, SourceHead, SourceListRequest, SourceObject, SourcePage,
-                SourceProbe, SourceProvider, SourceSse, SourceTimeouts, USER_AGENT_SUFFIX, is_multipart_etag, range_header_value,
-                resolve_path_style,
-            };
-        }
-    }
-
    pub mod metadata_sys {
-        #[cfg(feature = "test-util")]
-        pub use crate::bucket::metadata_sys::ConfigWriteLockProbe;
        pub use crate::bucket::metadata_sys::{
-            BucketMetadataMutationGuard, BucketMetadataSys, ObjectLockConfigState, acquire_bucket_metadata_transaction_lock,
+            BUCKET_CONFIG_PUBLISH_HOOK, BucketConfigPublishHook, BucketMetadataMutationGuard, BucketMetadataSys,
+            ObjectLockConfigState, acquire_bucket_metadata_transaction_lock,
            acquire_bucket_metadata_transaction_lock_for_incarnation, acquire_scanner_bucket_incarnation_fence,
-            capture_bucket_metadata_incarnation, delete, delete_if_incarnation, delete_under_transaction_lock, get,
-            get_accelerate_config, get_bucket_policy, get_bucket_policy_raw, get_bucket_targets_config, get_config_from_disk,
-            get_cors_config, get_durability_config, get_global_bucket_metadata_sys, get_lifecycle_config, get_logging_config,
-            get_notification_config, get_object_lock_config, get_object_lock_config_state, get_on_demand_migration_config,
-            get_public_access_block_config, get_quota_config, get_replication_config, get_request_payment_config, get_sse_config,
-            get_tagging_config, get_versioning_config, get_website_config, init_bucket_metadata_sys, list_bucket_targets,
-            reload_bucket_metadata, remove_bucket_metadata, set_bucket_metadata, update,
-            update_bucket_targets_under_transaction_lock, update_config_with, update_if_incarnation, update_quota_if_incarnation,
-            update_under_transaction_lock,
+            capture_bucket_metadata_incarnation, delete, delete_if_incarnation, delete_if_incarnation_at,
+            delete_under_transaction_lock, get, get_accelerate_config, get_bucket_policy, get_bucket_policy_raw,
+            get_bucket_targets_config, get_config_from_disk, get_cors_config, get_durability_config,
+            get_global_bucket_metadata_sys, get_lifecycle_config, get_logging_config, get_notification_config,
+            get_object_lock_config, get_object_lock_config_state, get_on_demand_migration_config,
+            get_on_demand_migration_config_in, get_public_access_block_config, get_quota_config, get_replication_config,
+            get_request_payment_config, get_sse_config, get_tagging_config, get_versioning_config, get_website_config,
+            init_bucket_metadata_sys, list_bucket_targets, reload_bucket_metadata, remove_bucket_metadata, set_bucket_metadata,
+            update, update_bucket_targets_under_transaction_lock, update_config_with, update_if_incarnation,
+            update_if_incarnation_at, update_quota_if_incarnation, update_quota_if_incarnation_at, update_under_transaction_lock,
+            update_under_transaction_lock_at,
        };
+        #[cfg(feature = "test-util")]
+        pub use crate::bucket::metadata_sys::{ConfigWriteLockProbe, test_support};
    }

    pub mod migration {
@@ -249,7 +231,7 @@ pub mod bucket {
    pub mod remote_s3_client {
        pub use crate::bucket::remote_s3_client::{
            PathStyle, RemoteCredentials, RemoteS3ClientError, RemoteS3EndpointSpec, RemoteS3RetryPolicy, build_remote_s3_client,
-            validate_remote_endpoint,
+            build_remote_s3_config, validate_remote_endpoint, validate_target_ca_pem,
        };
    }

@@ -327,7 +309,7 @@ pub mod cache {
 pub mod capacity {
    pub use crate::core::pools::{
        DecommissionUnresolvedEntry, PoolDecommissionInfo, PoolStatus, get_total_usable_capacity, get_total_usable_capacity_free,
-        path2_bucket_object, path2_bucket_object_with_base_path,
+        is_pool_activation_fleet_proof_error, path2_bucket_object, path2_bucket_object_with_base_path,
    };
    pub use crate::store::utils::is_reserved_or_invalid_bucket;
 }
@@ -434,8 +416,8 @@ pub mod disk {

 pub mod error {
    pub use crate::error::{
-        Error, Result, StorageError, classify_system_path_failure_reason, is_err_bucket_not_found, is_err_object_not_found,
-        is_err_version_not_found,
+        Error, PoolMetadataError, PoolMetadataFailure, Result, StorageError, classify_system_path_failure_reason,
+        is_err_bucket_not_found, is_err_object_not_found, is_err_version_not_found,
    };
 }

@@ -480,9 +462,12 @@ pub mod notification {
    #[cfg(any(test, feature = "test-util"))]
    pub use crate::services::notification_sys::rotate_cross_pool_fence_fleet_proof_for_test;
    pub use crate::services::notification_sys::{
-        ClusterTierDailyStats, CrossPoolFenceFleetProofToken, LegacyTransitionStateReconcileFleetProofToken, NotificationPeerErr,
-        NotificationSys, ScannerPublicationLeaseGrant, acquire_cross_pool_fence_fleet_proof,
+        ClusterTierDailyStats, CrossPoolFenceFleetProofToken, IlmRecoveryExportFleetProofToken,
+        LegacyTransitionStateReconcileFleetProofToken, NotificationPeerErr, NotificationSys, ScannerPublicationLeaseGrant,
+        acquire_cross_pool_fence_fleet_proof, acquire_ilm_recovery_export_fleet_proof,
        acquire_legacy_transition_state_reconcile_fleet_proof, cross_pool_fence_fleet_proof_matches, get_global_notification_sys,
+        ilm_recovery_export_fleet_proof_matches, ilm_recovery_export_local_process_epoch,
+        ilm_recovery_export_member_epochs_sha256, ilm_recovery_export_topology_generation,
        legacy_transition_state_reconcile_fleet_proof_matches, new_global_notification_sys,
        scanner_peer_transport_error_message_is_retryable, start_remote_version_state_fleet_probe,
    };
@@ -495,9 +480,9 @@ pub mod object {
        ObjectInfo, ObjectLockConfigSnapshot, ObjectMutationHook, ObjectOptions, PutObjReader, QuotaAdmission,
        RangedDecompressReader, ReadEncryptionMaterial, ReadEncryptionMode, ReadEncryptionRequest,
        SCANNER_PUBLICATION_LEASE_FENCE_METADATA_KEY, ScannerPublicationCommitScope, ScannerPublicationCommitStartError,
-        ScannerPublicationCommitState, StreamConsumer, get_object_body_cache_plaintext_len, lookup_get_object_body_cache_hook,
-        register_get_object_body_cache_hook, register_object_mutation_hook, unregister_get_object_body_cache_hook,
-        unregister_object_mutation_hook,
+        ScannerPublicationCommitState, StreamConsumer, WriteCompletion, get_object_body_cache_plaintext_len,
+        lookup_get_object_body_cache_hook, register_get_object_body_cache_hook, register_object_mutation_hook,
+        unregister_get_object_body_cache_hook, unregister_object_mutation_hook,
    };
    pub use crate::store::{
        PrepareSelectObjectSnapshotError, PreparedGetObjectReader, SelectObjectSnapshot, SelectObjectSnapshotReadError,
@@ -535,7 +520,8 @@ pub mod rpc {
    pub use crate::cluster::rpc::{
        AuthenticatedChannel, KMS_SIGNAL_SUBSYSTEM, LocalPeerS3Client, PEER_RESTDRY_RUN, PEER_RESTSIGNAL, PEER_RESTSUB_SYS,
        PeerRestClient, PeerS3Client, S3PeerSys, SERVICE_SIGNAL_REFRESH_CONFIG, SERVICE_SIGNAL_RELOAD_DYNAMIC,
-        ScannerBucketListing, ScannerPeerActivity, ScannerPeerDirtyUsageSnapshot, ScannerPublicationLease, TONIC_RPC_PREFIX,
+        ScannerBucketListing, ScannerDirtyUsageAcknowledgement, ScannerPeerActivity, ScannerPeerDirtyUsageBucket,
+        ScannerPeerDirtyUsageSnapshot, ScannerPublicationLease, ScannerScopedDirtyUsageAckEntry, TONIC_RPC_PREFIX,
        TonicInterceptor, build_put_file_auth_trailer, check_and_record_signed_rpc_nonce, decode_heal_bucket_rpc_options,
        encode_heal_bucket_rpc_options, gen_signature_headers, gen_tonic_replay_scope_headers, gen_tonic_signature_headers,
        gen_tonic_signature_interceptor, node_service_time_out_client, node_service_time_out_client_no_auth,
@@ -561,6 +547,12 @@ pub mod set_disk {
    pub mod test_util {
        pub use crate::bucket::quota::reservation::fail_next_quota_ledger_save_for_test;
        pub use crate::set_disk::{MultipartCommitBarrier, MultipartCommitPause, PutObjectCommitBarrier, PutObjectCommitPause};
+
+        /// Keep a namespace commit pending until the returned owner is dropped.
+        #[must_use]
+        pub fn hold_namespace_commit(store: &crate::store::ECStore) -> impl Send + Sync {
+            store.ctx.begin_namespace_commit()
+        }
    }
 }

@@ -18,7 +18,7 @@ use crate::bucket::metadata_sys::get_replication_config;
 use crate::bucket::remote_s3_client::{
    PathStyle, REPLICATION_TARGET_RETRY_POLICY, RemoteCredentials, RemoteS3EndpointSpec, build_remote_s3_client,
 };
-use crate::bucket::replication::{ObjectLockIntegrity, object_lock_put_integrity};
+use crate::bucket::replication::{ObjectLockIntegrity, object_lock_put_integrity, replication_etags_match};
 use crate::bucket::replication::{ReplicationStatusType, ReplicationTargetConfigBridge};
 use crate::bucket::target::ARN;
 use crate::bucket::target::BucketTargetType;
@@ -33,6 +33,8 @@ use aws_sdk_s3::operation::get_object::{GetObjectError, GetObjectOutput};
 use aws_sdk_s3::operation::get_object_tagging::{GetObjectTaggingError, GetObjectTaggingOutput};
 use aws_sdk_s3::operation::head_bucket::HeadBucketError;
 use aws_sdk_s3::operation::head_object::HeadObjectError;
+use aws_sdk_s3::operation::put_object_legal_hold::{PutObjectLegalHoldError, PutObjectLegalHoldOutput};
+use aws_sdk_s3::operation::put_object_retention::{PutObjectRetentionError, PutObjectRetentionOutput};
 use aws_sdk_s3::operation::put_object_tagging::{PutObjectTaggingError, PutObjectTaggingOutput};
 use aws_sdk_s3::operation::upload_part::UploadPartOutput;
 use aws_sdk_s3::primitives::ByteStream;
@@ -42,6 +44,7 @@ use aws_sdk_s3::types::{
    ChecksumAlgorithm, ChecksumMode, CompletedMultipartUpload, CompletedPart, ObjectLockLegalHoldStatus, ObjectLockRetentionMode,
    ServerSideEncryption,
 };
+use aws_sdk_s3::types::{ObjectLockLegalHold, ObjectLockRetention};
 use aws_sdk_s3::{Client as S3Client, operation::head_object::HeadObjectOutput};
 use aws_smithy_runtime_api::client::orchestrator::HttpRequest;
 use futures::{StreamExt, stream};
@@ -126,6 +129,25 @@ impl From<&BucketTarget> for RemoteS3EndpointSpec {
 }

 pub type HeadObjectSdkError = Box<SdkError<HeadObjectError>>;
+
+/// Whether an edited bucket target still addresses the same remote service
+/// (endpoint, bucket, path style, TLS and identity), so a verdict learned
+/// about that service stays valid across the edit.
+fn same_replication_service(edited: &BucketTarget, previous: &BucketTarget) -> bool {
+    let access_key = |target: &BucketTarget| target.credentials.as_ref().map(|credentials| credentials.access_key.clone());
+    edited.endpoint == previous.endpoint
+        && edited.target_bucket == previous.target_bucket
+        && edited.secure == previous.secure
+        && edited.path == previous.path
+        && access_key(edited) == access_key(previous)
+}
+
+/// Page size and page budget for [`TargetClient::locate_replica_by_etag`].
+const FIND_VERSION_BY_ETAG_PAGE_SIZE: i32 = 1000;
+const FIND_VERSION_BY_ETAG_MAX_PAGES: usize = 8;
+/// Candidate cap for [`TargetClient::replica_candidates_by_etag`]: more than
+/// this many same-content versions of one key is ambiguity by any measure.
+const FIND_VERSION_BY_ETAG_MAX_MATCHES: usize = 16;
 pub type GetObjectSdkError = Box<SdkError<GetObjectError>>;
 pub type GetObjectTaggingSdkError = Box<SdkError<GetObjectTaggingError>>;
 pub type PutObjectTaggingSdkError = Box<SdkError<PutObjectTaggingError>>;
@@ -349,6 +371,13 @@ struct TargetClientBuildProbe {
 /// their import path while the verdict vocabulary lives with the
 /// replication decision logic.
 pub use crate::bucket::replication::SsecPassthroughCapability;
+/// Version-identity verdicts (see the enum's own docs in
+/// `rustfs-replication`) are cached here per target ARN and follow the same
+/// `arn_remotes_map` lifecycle. They carry no TTL: the verdict is refreshed
+/// by every replication write's response, so it can only go stale on a
+/// target that receives no writes — and a stale `MintsOwn` costs one extra
+/// content-identity lookup before a PUT, never a lost replica.
+pub use crate::bucket::replication::VersionIdentityCapability;

 /// How long an audited SSE-C passthrough verdict stays authoritative.
 ///
@@ -375,6 +404,11 @@ pub struct BucketTargetSys {
    /// SSE-C passthrough capability verdicts keyed by target ARN. See
    /// [`SsecPassthroughCapability`]; reset alongside `arn_remotes_map`.
    ssec_passthrough_map: Arc<RwLock<HashMap<String, SsecPassthroughRecord>>>,
+    /// Version-identity verdicts keyed by target ARN. See
+    /// [`VersionIdentityCapability`]; reset alongside `arn_remotes_map`. A std
+    /// lock (never held across an await) so the replication worker can record
+    /// a verdict from inside its synchronous PUT-response audit.
+    version_identity_map: Arc<std::sync::RwLock<HashMap<String, VersionIdentityCapability>>>,
    pub targets_map: Arc<RwLock<HashMap<String, Vec<BucketTarget>>>>,
    /// Buckets whose persisted `bucket-targets.json` exists but cannot be
    /// decoded (rustfs/backlog#2282). Written under the bucket's update mutex
@@ -423,6 +457,7 @@ impl BucketTargetSys {
        Self {
            arn_remotes_map: Arc::new(RwLock::new(HashMap::new())),
            ssec_passthrough_map: Arc::new(RwLock::new(HashMap::new())),
+            version_identity_map: Arc::new(std::sync::RwLock::new(HashMap::new())),
            targets_map: Arc::new(RwLock::new(HashMap::new())),
            unreadable_targets: Arc::new(RwLock::new(HashSet::new())),
            h_mutex: Arc::new(RwLock::new(HashMap::new())),
@@ -746,10 +781,40 @@ impl BucketTargetSys {
                arn_remotes_map.remove(&target.arn);
                health_map.remove(&target.arn);
                ssec_map.remove(&target.arn);
+                self.forget_version_identity_capability(&target.arn);
            }
        }
    }

+    /// Cached version-identity verdict for a target ARN; `Unknown` until a
+    /// replication write or a replication-check VersionFidelity probe judged
+    /// it since the target was built.
+    pub fn version_identity_capability(&self, arn: &str) -> VersionIdentityCapability {
+        self.version_identity_map
+            .read()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .get(arn)
+            .copied()
+            .unwrap_or_default()
+    }
+
+    /// Record a version-identity verdict for a target ARN. Written by the
+    /// replication worker after every PutObject / CompleteMultipartUpload
+    /// response and by the replication-check VersionFidelity phase.
+    pub fn record_version_identity_capability(&self, arn: &str, capability: VersionIdentityCapability) {
+        self.version_identity_map
+            .write()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .insert(arn.to_string(), capability);
+    }
+
+    fn forget_version_identity_capability(&self, arn: &str) {
+        self.version_identity_map
+            .write()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .remove(arn);
+    }
+
    /// Cached SSE-C passthrough capability for a target ARN, plus whether the
    /// verdict is older than [`SSEC_PASSTHROUGH_CAPABILITY_TTL`]. `(Unknown,
    /// false)` when no verdict has been recorded since the target was built.
@@ -794,17 +859,24 @@ impl BucketTargetSys {
    ) -> Result<BucketTargets, BucketTargetError> {
        self.validate_target(bucket, target).await?;

-        let mut bucket_targets = match self.list_bucket_targets(bucket).await {
-            Ok(targets) => targets,
-            Err(BucketTargetError::BucketRemoteTargetNotFound { .. }) => BucketTargets::default(),
-            Err(err) => return Err(err),
-        };
+        let mut bucket_targets = self.targets_base_for_write(bucket).await?;

        Self::upsert_target_entry(&mut bucket_targets.targets, target, update)?;

        Ok(bucket_targets)
    }

+    /// Ordinary writes must not turn an unreadable cached snapshot into an
+    /// empty configuration. Explicit repair belongs to the metadata transaction
+    /// that can inspect the current persisted state.
+    async fn targets_base_for_write(&self, bucket: &str) -> Result<BucketTargets, BucketTargetError> {
+        match self.list_bucket_targets(bucket).await {
+            Ok(targets) => Ok(targets),
+            Err(BucketTargetError::BucketRemoteTargetNotFound { .. }) => Ok(BucketTargets::default()),
+            Err(err) => Err(err),
+        }
+    }
+
    pub async fn validate_target(&self, bucket: &str, target: &BucketTarget) -> Result<(), BucketTargetError> {
        if !target.target_type.is_valid() {
            return Err(BucketTargetError::BucketRemoteArnTypeInvalid {
@@ -863,7 +935,9 @@ impl BucketTargetSys {
        Ok(())
    }

-    fn upsert_target_entry(
+    /// Merge a validated target into a caller-owned snapshot. The caller must
+    /// protect that snapshot through persistence.
+    pub fn upsert_target_entry(
        bucket_targets: &mut Vec<BucketTarget>,
        target: &BucketTarget,
        update: bool,
@@ -1153,12 +1227,32 @@ impl BucketTargetSys {
        // Remove existing targets
        if let Some(existing_targets) = targets_map.remove(bucket) {
            let mut ssec_map = self.ssec_passthrough_map.write().await;
+            let unchanged_service: HashMap<&str, &BucketTarget> = targets
+                .map(|new_targets| {
+                    new_targets
+                        .targets
+                        .iter()
+                        .map(|target| (target.arn.as_str(), target))
+                        .collect()
+                })
+                .unwrap_or_default();
            for target in existing_targets {
                arn_remotes_map.remove(&target.arn);
                health_map.remove(&target.arn);
                // A rebuilt/edited target may point at a different service:
                // the SSE-C passthrough verdict must be re-audited from Unknown.
                ssec_map.remove(&target.arn);
+                // The version-identity verdict survives an edit that keeps the
+                // same remote service (a resync start or a bandwidth change
+                // rewrites the entry in place): forgetting it there would make
+                // the very resync that follows re-drive every object as a
+                // duplicate on a target that mints its own version ids.
+                if unchanged_service
+                    .get(target.arn.as_str())
+                    .is_none_or(|edited| !same_replication_service(edited, &target))
+                {
+                    self.forget_version_identity_capability(&target.arn);
+                }
                self.update_bandwidth_limit(bucket, &target.arn, 0);
            }
        }
@@ -1227,9 +1321,13 @@ impl BucketTargetSys {
            return (String::new(), false);
        };

-        {
        let targets_map = self.targets_map.read().await;
-            if let Some(targets) = targets_map.get(bucket) {
+        let targets = targets_map.get(bucket).map(Vec::as_slice).unwrap_or_default();
+        Self::remote_arn_for_targets(targets, target, depl_id)
+    }
+
+    /// Resolve create idempotency against the snapshot the caller will persist.
+    pub fn remote_arn_for_targets(targets: &[BucketTarget], target: &BucketTarget, depl_id: &str) -> (String, bool) {
        for tgt in targets {
            if tgt.target_type == target.target_type
                && tgt.target_bucket == target.target_bucket
@@ -1246,8 +1344,6 @@ impl BucketTargetSys {
                return (tgt.arn.clone(), true);
            }
        }
-            }
-        }

        if !target.target_type.is_valid() {
            return (String::new(), false);
@@ -1273,6 +1369,7 @@ fn generate_arn(t: &BucketTarget, depl_id: &str) -> String {
    arn.to_string()
 }

+#[derive(Debug, Clone)]
 pub struct RemoveObjectOptions {
    pub force_delete: bool,
    pub governance_bypass: bool,
@@ -1328,7 +1425,12 @@ fn build_remove_object_headers(version_id: Option<&str>, opts: &RemoveObjectOpti
 /// and silently creates a delete marker instead of removing the version, while
 /// the source stamps `VersionPurgeStatus=Complete` (backlog#799 B8 / #857).
 /// Non-replication callers always pass the version through unchanged.
-fn resolve_delete_api_version_id(version_id: Option<String>, opts: &RemoveObjectOptions) -> Option<String> {
+/// The `versionId` a replicated DELETE puts on the wire: none for a
+/// delete-marker creation (the target mints the marker; the source version
+/// travels in the internal headers for RustFS peers), the addressed version
+/// otherwise. A generic S3 target given the version id on a marker-creation
+/// DELETE would permanently delete that version instead.
+pub fn resolve_delete_api_version_id(version_id: Option<String>, opts: &RemoveObjectOptions) -> Option<String> {
    if opts.replication_request && opts.replication_delete_marker {
        None
    } else {
@@ -1881,6 +1983,125 @@ impl TargetClient {
            .map_err(Box::new)
    }

+    /// Candidate replicas by content identity on a target that mints its own
+    /// version ids: page `ListObjectVersions` under the exact key and report
+    /// the live versions whose ETag matches `source_etag`, newest first.
+    /// Delete markers and prefix siblings never match. Bounded to
+    /// [`FIND_VERSION_BY_ETAG_MAX_PAGES`] pages and
+    /// [`FIND_VERSION_BY_ETAG_MAX_MATCHES`] candidates so a key with a very
+    /// deep history cannot turn one convergence check into an unbounded scan;
+    /// a replica beyond that window reads as missing, which only costs a
+    /// re-PUT (today's behaviour), never a lost object.
+    ///
+    /// Content identity is not version identity: two source generations with
+    /// the same bytes have the same ETag. Callers drop the candidates other
+    /// source versions already claim through their ledgers and refuse an
+    /// [`ReplicaLocation::Ambiguous`] remainder before mutating or deleting.
+    pub async fn replica_candidates_by_etag(
+        &self,
+        bucket: &str,
+        object: &str,
+        source_etag: &str,
+    ) -> Result<Vec<String>, Box<SdkError<aws_sdk_s3::operation::list_object_versions::ListObjectVersionsError>>> {
+        let mut key_marker: Option<String> = None;
+        let mut version_id_marker: Option<String> = None;
+        let mut matches: Vec<String> = Vec::new();
+        for _ in 0..FIND_VERSION_BY_ETAG_MAX_PAGES {
+            let page = self
+                .client
+                .list_object_versions()
+                .bucket(bucket)
+                .prefix(object)
+                .max_keys(FIND_VERSION_BY_ETAG_PAGE_SIZE)
+                .set_key_marker(key_marker.take())
+                .set_version_id_marker(version_id_marker.take())
+                .send()
+                .await
+                .map_err(Box::new)?;
+            matches.extend(
+                page.versions()
+                    .iter()
+                    .filter(|version| {
+                        version.key() == Some(object)
+                            && version.version_id().is_some_and(|id| !id.is_empty())
+                            && replication_etags_match(Some(source_etag), version.e_tag())
+                    })
+                    .filter_map(|version| version.version_id().map(str::to_string)),
+            );
+            // A listing that moved past the exact key (every listed key is >=
+            // the prefix), ended, or already filled the candidate cap decides.
+            if matches.len() >= FIND_VERSION_BY_ETAG_MAX_MATCHES
+                || page
+                    .versions()
+                    .iter()
+                    .any(|version| version.key().is_some_and(|key| key > object))
+                || !page.is_truncated().unwrap_or(false)
+            {
+                break;
+            }
+            key_marker = page.next_key_marker().map(str::to_string);
+            version_id_marker = page.next_version_id_marker().map(str::to_string);
+            if key_marker.is_none() {
+                break;
+            }
+        }
+        matches.truncate(FIND_VERSION_BY_ETAG_MAX_MATCHES);
+        Ok(matches)
+    }
+
+    /// PutObjectRetention against a replica version on a target that does not
+    /// take retention through the replication PUT's own headers (it mints its
+    /// own version ids, so a re-PUT would create another version instead of
+    /// updating this one). Anti-loop marker always added.
+    pub async fn put_object_retention(
+        &self,
+        bucket: &str,
+        object: &str,
+        version_id: Option<String>,
+        mode: ObjectLockRetentionMode,
+        retain_until: aws_sdk_s3::primitives::DateTime,
+    ) -> Result<PutObjectRetentionOutput, Box<SdkError<PutObjectRetentionError>>> {
+        let headers = proxy_outbound_headers(HeaderMap::new());
+        self.client
+            .put_object_retention()
+            .bucket(bucket)
+            .key(object)
+            .set_version_id(resolve_read_api_version_id(version_id))
+            .retention(
+                ObjectLockRetention::builder()
+                    .mode(mode)
+                    .retain_until_date(retain_until)
+                    .build(),
+            )
+            .customize()
+            .map_request(move |req| apply_extra_headers(req, &headers))
+            .send()
+            .await
+            .map_err(Box::new)
+    }
+
+    /// PutObjectLegalHold counterpart of [`Self::put_object_retention`].
+    pub async fn put_object_legal_hold(
+        &self,
+        bucket: &str,
+        object: &str,
+        version_id: Option<String>,
+        status: ObjectLockLegalHoldStatus,
+    ) -> Result<PutObjectLegalHoldOutput, Box<SdkError<PutObjectLegalHoldError>>> {
+        let headers = proxy_outbound_headers(HeaderMap::new());
+        self.client
+            .put_object_legal_hold()
+            .bucket(bucket)
+            .key(object)
+            .set_version_id(resolve_read_api_version_id(version_id))
+            .legal_hold(ObjectLockLegalHold::builder().status(status).build())
+            .customize()
+            .map_request(move |req| apply_extra_headers(req, &headers))
+            .send()
+            .await
+            .map_err(Box::new)
+    }
+
    /// HEAD used by the read-proxy path (GET/HEAD of an object not yet
    /// replicated locally, MinIO `proxyHeadToRepTarget`).
    ///
@@ -2053,7 +2274,15 @@ impl TargetClient {
            }
        }

-        match builder
+        // A forwarded source checksum is this PUT's integrity header. In
+        // streaming-checksum mode (`RUSTFS_REPLICATION_STREAMING_CHECKSUMS`)
+        // the SDK would still add its default CRC32 trailer, and a target that
+        // receives both keeps the trailer's algorithm: a forwarded SHA256
+        // vanished from the replica while the source reported COMPLETED. Pin
+        // this request to WhenRequired so nothing is sent beside the source's
+        // own checksum.
+        let forwards_source_checksum = headers.keys().any(|name| name.as_str().starts_with("x-amz-checksum-"));
+        let mut operation = builder
            .bucket(bucket)
            .key(object)
            .content_length(size)
@@ -2073,10 +2302,14 @@ impl TargetClient {
                }

                Result::<_, aws_smithy_types::error::operation::BuildError>::Ok(req)
-            })
-            .send()
-            .await
-        {
+            });
+        if forwards_source_checksum {
+            operation = operation.config_override(
+                aws_sdk_s3::config::Builder::new()
+                    .request_checksum_calculation(aws_sdk_s3::config::RequestChecksumCalculation::WhenRequired),
+            );
+        }
+        match operation.send().await {
            Ok(output) => {
                // Under SSE-KMS/DSSE or SSE-C the target's ETag is not the MD5
                // of the stored plaintext, so it cannot be compared against the
@@ -2320,6 +2553,45 @@ impl TargetClient {
    }
 }

+/// Where a replica stands on a target that mints its own version ids, by
+/// content identity (exact key + ETag) after the candidates other source
+/// versions claim were removed. See
+/// [`TargetClient::replica_candidates_by_etag`].
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ReplicaLocation {
+    /// No live version under the key carries the source ETag.
+    Missing,
+    /// Exactly one live version carries it: safe to address.
+    Unique(String),
+    /// More than one live version carries it (same bytes replicated for
+    /// several source generations). `newest` is the most recently listed
+    /// one — good enough to prove the replica exists, never good enough to
+    /// pick which one to mutate or delete.
+    Ambiguous { newest: String },
+}
+
+impl ReplicaLocation {
+    /// `matches` newest first, as the target listed them.
+    pub fn from_matches(mut matches: Vec<String>) -> Self {
+        match matches.len() {
+            0 => Self::Missing,
+            1 => Self::Unique(matches.remove(0)),
+            _ => Self::Ambiguous {
+                newest: matches.remove(0),
+            },
+        }
+    }
+
+    /// The version to read for existence/ETag checks, where an ambiguous
+    /// match is still a located replica.
+    pub fn any_version_id(&self) -> Option<&str> {
+        match self {
+            Self::Missing => None,
+            Self::Unique(version_id) | Self::Ambiguous { newest: version_id } => Some(version_id),
+        }
+    }
+}
+
 #[derive(Debug)]
 pub enum BucketTargetError {
    BucketRemoteTargetNotFound {
@@ -2496,13 +2768,21 @@ mod tests {
    }

    fn header_recording_target_client(response_headers: Vec<(String, String)>) -> (TargetClient, RecordedHeaders) {
+        header_recording_target_client_with_checksums(response_headers, replication_request_checksum_calculation())
+    }
+
+    fn header_recording_target_client_with_checksums(
+        response_headers: Vec<(String, String)>,
+        checksums: RequestChecksumCalculation,
+    ) -> (TargetClient, RecordedHeaders) {
        let request_headers: RecordedHeaders = Arc::new(std::sync::Mutex::new(Vec::new()));
        let connector = SharedHttpConnector::new(RecordingHeaderConnector {
            request_headers: Arc::clone(&request_headers),
            response_headers,
        });
        let http_client = http_client_fn(move |_settings, _components| connector.clone());
-        let client = s3_client_for_test(443, Some(http_client));
+        let client =
+            s3_client_for_endpoint_test_with_checksums("https://localhost:443".to_string(), Some(http_client), checksums);
        (
            TargetClient {
                endpoint: "https://localhost:443".to_string(),
@@ -2669,6 +2949,47 @@ mod tests {
        }
    }

+    /// With streaming checksums enabled the SDK adds a CRC32 trailer to every
+    /// upload. A PUT that forwards the source's checksum must not get that
+    /// second algorithm: a target that receives both keeps the trailer's and
+    /// the forwarded SHA256 never reaches the replica (rustfs/backlog#2340).
+    #[tokio::test]
+    async fn streaming_put_object_with_forwarded_checksum_sends_no_sdk_checksum() {
+        let (client, recorded) =
+            header_recording_target_client_with_checksums(Vec::new(), RequestChecksumCalculation::WhenSupported);
+        let mut forwarded = PutObjectOptions::default();
+        forwarded.user_metadata.insert(
+            "x-amz-checksum-sha256".to_string(),
+            "OoJ3yNhRwv3wwtZoGqEIPrPX9xwTnfLl+ka0wStN1g0=".to_string(),
+        );
+        client
+            .put_object("target-bucket", "object", 4, streaming_test_body(b"data"), &forwarded)
+            .await
+            .expect("recorded put_object should succeed");
+        client
+            .put_object("target-bucket", "object", 4, streaming_test_body(b"data"), &PutObjectOptions::default())
+            .await
+            .expect("recorded put_object should succeed");
+        let recorded = recorded.lock().expect("recorded header lock should not be poisoned");
+        let with_forwarded = &recorded[0];
+        assert_eq!(
+            recorded_header(with_forwarded, "x-amz-checksum-sha256"),
+            Some("OoJ3yNhRwv3wwtZoGqEIPrPX9xwTnfLl+ka0wStN1g0=")
+        );
+        assert_eq!(
+            recorded_header(with_forwarded, "x-amz-trailer"),
+            None,
+            "the SDK must not add a trailer checksum"
+        );
+        assert_eq!(recorded_header(with_forwarded, "x-amz-sdk-checksum-algorithm"), None);
+        // Control: the same client still streams a trailer when nothing is forwarded.
+        let without_forwarded = &recorded[1];
+        assert!(
+            recorded_header(without_forwarded, "x-amz-trailer").is_some(),
+            "streaming mode must still apply to uploads without a forwarded checksum: {without_forwarded:?}"
+        );
+    }
+
    /// A forwarded source checksum already satisfies the rule; nothing is added.
    #[tokio::test]
    async fn locked_put_object_keeps_a_forwarded_source_checksum() {
@@ -3034,6 +3355,14 @@ mod tests {
    }

    fn s3_client_for_endpoint_test(endpoint: String, http_client: Option<SharedHttpClient>) -> S3Client {
+        s3_client_for_endpoint_test_with_checksums(endpoint, http_client, replication_request_checksum_calculation())
+    }
+
+    fn s3_client_for_endpoint_test_with_checksums(
+        endpoint: String,
+        http_client: Option<SharedHttpClient>,
+        checksums: RequestChecksumCalculation,
+    ) -> S3Client {
        let credentials = SdkCredentials::builder()
            .access_key_id("test-access")
            .secret_access_key("test-secret")
@@ -3047,7 +3376,7 @@ mod tests {
            .behavior_version(aws_sdk_s3::config::BehaviorVersion::latest())
            // Mirror the production remote-target builder so recorded requests
            // exercise the same checksum/framing behavior (#6853).
-            .request_checksum_calculation(replication_request_checksum_calculation());
+            .request_checksum_calculation(checksums);
        if let Some(http_client) = http_client {
            config = config.http_client(http_client);
        }
@@ -3210,6 +3539,64 @@ mod tests {
        assert!(message.contains("connection refused"));
    }

+    #[test]
+    fn same_replication_service_ignores_resync_and_bandwidth_edits() {
+        let base = BucketTarget {
+            endpoint: "target.example:9000".to_string(),
+            target_bucket: "replica".to_string(),
+            secure: true,
+            path: "on".to_string(),
+            arn: "arn:rustfs:replication:us-east-1:bucket:same".to_string(),
+            credentials: Some(Credentials {
+                access_key: "access".to_string(),
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+        let resync_edit = BucketTarget {
+            reset_id: "reset-1".to_string(),
+            bandwidth_limit: 1024,
+            ..base.clone()
+        };
+        assert!(same_replication_service(&resync_edit, &base));
+        for moved in [
+            BucketTarget {
+                endpoint: "other.example:9000".to_string(),
+                ..base.clone()
+            },
+            BucketTarget {
+                target_bucket: "other".to_string(),
+                ..base.clone()
+            },
+            BucketTarget {
+                secure: false,
+                ..base.clone()
+            },
+            BucketTarget {
+                credentials: Some(Credentials {
+                    access_key: "rotated".to_string(),
+                    ..Default::default()
+                }),
+                ..base.clone()
+            },
+        ] {
+            assert!(!same_replication_service(&moved, &base));
+        }
+    }
+
+    #[test]
+    fn version_identity_verdict_is_per_arn_and_forgotten_with_the_target() {
+        let sys = BucketTargetSys::default();
+        let arn = "arn:rustfs:replication:us-east-1:bucket:identity";
+        assert_eq!(sys.version_identity_capability(arn), VersionIdentityCapability::Unknown);
+        sys.record_version_identity_capability(arn, VersionIdentityCapability::MintsOwn);
+        assert_eq!(sys.version_identity_capability(arn), VersionIdentityCapability::MintsOwn);
+        assert_eq!(sys.version_identity_capability("other"), VersionIdentityCapability::Unknown);
+        // A rebuilt target may point at a different service.
+        sys.forget_version_identity_capability(arn);
+        assert_eq!(sys.version_identity_capability(arn), VersionIdentityCapability::Unknown);
+    }
+
    #[test]
    fn endpoint_health_key_preserves_explicit_port() {
        let url = Url::parse("https://remote.example:9443").expect("url should parse");
@@ -4313,4 +4700,41 @@ mod tests {
        let window = LastMinuteLatency::new();
        assert_eq!(window.get_total().avg, Duration::from_secs(0));
    }
+
+    fn repair_target(bucket: &str, id: &str) -> BucketTarget {
+        BucketTarget {
+            source_bucket: bucket.to_string(),
+            endpoint: "remote.example.com".to_string(),
+            target_bucket: "remote".to_string(),
+            arn: format!("arn:rustfs:replication:us-east-1:{bucket}:{id}"),
+            target_type: BucketTargetType::ReplicationService,
+            region: "us-east-1".to_string(),
+            ..Default::default()
+        }
+    }
+
+    #[tokio::test]
+    async fn an_unreadable_target_set_refuses_cached_writes() {
+        let sys = BucketTargetSys::default();
+        let bucket = "targets-repair-opt-in";
+        sys.mark_targets_unreadable(bucket).await;
+        assert!(matches!(
+            sys.targets_base_for_write(bucket).await,
+            Err(BucketTargetError::BucketRemoteTargetsUnreadable { .. })
+        ));
+    }
+
+    #[tokio::test]
+    async fn a_readable_target_set_remains_the_write_base() {
+        let sys = BucketTargetSys::default();
+        let bucket = "targets-repair-readable";
+        let existing = repair_target(bucket, "keep");
+        sys.targets_map
+            .write()
+            .await
+            .insert(bucket.to_string(), vec![existing.clone()]);
+        let base = sys.targets_base_for_write(bucket).await.expect("read targets");
+        assert_eq!(base.targets.len(), 1);
+        assert_eq!(base.targets[0].arn, existing.arn);
+    }
 }
@@ -32,6 +32,7 @@ use crate::bucket::lifecycle::manual_transition_job::{
    record_manual_transition_worker_result_with_reason, renew_manual_transition_job_lease_if_owned,
    save_manual_transition_job_record_if_current, save_manual_transition_task_if_absent, update_manual_transition_job_record,
 };
+use crate::bucket::lifecycle::recovery_disposition_runtime::run_recovery_disposition_maintenance_loop;
 use crate::bucket::lifecycle::replication_sink;
 use crate::bucket::lifecycle::replication_sink::{
    DeleteReplicationConfigSnapshot, ReplicationObjectBridge, ReplicationStatusType, replication_state_to_filemeta,
@@ -149,6 +150,19 @@ pub type ExpiryOpType = Box<dyn ExpiryOp + Send + Sync + 'static>;
 static XXHASH_SEED: u64 = 0;
 static TIER_FREE_VERSION_RECOVERY_STARTED: OnceLock<()> = OnceLock::new();
 static MANUAL_TRANSITION_JOB_RECOVERY_STARTED: OnceLock<()> = OnceLock::new();
+static RECOVERY_DISPOSITION_MAINTENANCE_STARTED: OnceLock<()> = OnceLock::new();
+
+#[cfg(test)]
+#[derive(Default)]
+struct FreeVersionPostRemoteDeleteTestBarrier {
+    arrived: Notify,
+    release: Notify,
+}
+
+#[cfg(test)]
+tokio::task_local! {
+    static FREE_VERSION_POST_REMOTE_DELETE_TEST_BARRIER: Arc<FreeVersionPostRemoteDeleteTestBarrier>;
+}

 pub const AMZ_OBJECT_TAGGING: &str = "X-Amz-Tagging";
 #[allow(
@@ -910,6 +924,11 @@ async fn cleanup_free_version_exact(api: Arc<ECStore>, oi: &ObjectInfo, cancel:
            })??;
        }
    }
+    #[cfg(test)]
+    if let Ok(barrier) = FREE_VERSION_POST_REMOTE_DELETE_TEST_BARRIER.try_with(Arc::clone) {
+        barrier.arrived.notify_one();
+        barrier.release.notified().await;
+    }
    if !free_version_cleanup_fences_current(&topology_generation, &api, &bucket_guard, &object_guards, &lease, cancel, deadline) {
        // Remote DELETE is idempotent, but a changed fence makes the local
        // outcome ambiguous. Keep every marker for a fully fenced retry.
@@ -2381,9 +2400,20 @@ pub async fn init_background_expiry(api: Arc<ECStore>) {
    let _ = spawn_tier_free_version_recovery_once(api.clone(), &TIER_FREE_VERSION_RECOVERY_STARTED);
    spawn_tier_delete_journal_recovery_once(api.clone());
    spawn_transition_transaction_recovery_once(api.clone());
+    spawn_recovery_disposition_maintenance_once(api.clone());
    spawn_manual_transition_job_recovery_once(api);
 }

+fn spawn_recovery_disposition_maintenance_once(api: Arc<ECStore>) -> Option<JoinHandle<()>> {
+    let cancel_token = api.ctx.background_cancel_token()?;
+    if RECOVERY_DISPOSITION_MAINTENANCE_STARTED.set(()).is_err() {
+        return None;
+    }
+    Some(tokio::spawn(async move {
+        run_recovery_disposition_maintenance_loop(api, cancel_token).await;
+    }))
+}
+
 fn spawn_manual_transition_job_recovery_once(api: Arc<ECStore>) -> Option<JoinHandle<()>> {
    if MANUAL_TRANSITION_JOB_RECOVERY_STARTED.set(()).is_err() {
        return None;
@@ -5831,7 +5861,7 @@ mod tests {
    #[cfg(feature = "test-util")]
    use crate::services::tier::test_util::register_mock_tier;
    #[cfg(feature = "test-util")]
-    use crate::services::tier::tier::TierConfigMgr;
+    use crate::services::tier::tier::{TIER_DRIVER_TEST_FACTORY, TierConfigMgr, TierDriverTestFactory};
    #[cfg(feature = "test-util")]
    use crate::services::tier::warm_backend::{TransitionCandidateProbe, WarmBackend as _};
    use crate::set_disk::{MultipartCommitBarrier, MultipartCommitPause};
@@ -7830,6 +7860,119 @@ mod tests {
        }
    }

+    #[cfg(feature = "test-util")]
+    #[tokio::test]
+    #[serial]
+    async fn tier_remove_waits_for_inflight_free_version_local_commit() {
+        let (disk_paths, ecstore) = setup_test_env().await;
+        let bucket = format!("tier-remove-free-version-{}", Uuid::new_v4());
+        let object = "free-version";
+        create_test_bucket(&ecstore, &bucket).await;
+        let (backend, identity_hex) = register_recovery_mock_tier(&ecstore).await;
+        let tier_manager = ecstore.tier_config_mgr();
+        {
+            let manager = tier_manager.read().await;
+            manager
+                .save_tiering_config(Arc::clone(&ecstore))
+                .await
+                .expect("mock tier configuration should persist before removal");
+        }
+        seed_recoverable_free_version(&disk_paths, &bucket, object, None, Some(identity_hex)).await;
+        let page = list_tier_free_versions(Arc::clone(&ecstore), 1, None, None, CancellationToken::new())
+            .await
+            .expect("seeded free version should be listed");
+        let oi = page
+            .items
+            .into_iter()
+            .next()
+            .expect("seeded free version should be recoverable");
+
+        backend
+            .set_put_remote_version(Some(oi.transitioned_object.version_id.clone()))
+            .await;
+        let seed_lease = TierConfigMgr::acquire_operation_lease(&tier_manager, "WARM")
+            .await
+            .expect("mock tier lease should be available");
+        seed_lease
+            .put(&oi.transitioned_object.name, ReaderImpl::Body(Bytes::from_static(b"body")), 4)
+            .await
+            .expect("remote free-version tuple should be seeded");
+        drop(seed_lease);
+
+        let barrier = Arc::new(super::FreeVersionPostRemoteDeleteTestBarrier::default());
+        let cleanup_barrier = Arc::clone(&barrier);
+        let cleanup_store = Arc::clone(&ecstore);
+        let cleanup_oi = oi.clone();
+        let cleanup = tokio::spawn(async move {
+            super::FREE_VERSION_POST_REMOTE_DELETE_TEST_BARRIER
+                .scope(cleanup_barrier, async move {
+                    super::cleanup_free_version_exact(cleanup_store, &cleanup_oi, &CancellationToken::new()).await
+                })
+                .await
+        });
+        tokio::time::timeout(StdDuration::from_secs(30), barrier.arrived.notified())
+            .await
+            .expect("free-version cleanup should pause after the remote delete");
+        assert!(!backend.contains(&oi.transitioned_object.name).await);
+
+        let remove_manager = Arc::clone(&tier_manager);
+        let remove_store = Arc::clone(&ecstore);
+        let remove_backend = backend.clone();
+        let remove_driver_factory: TierDriverTestFactory = Arc::new(move |_| Ok(Box::new(remove_backend.clone())));
+        let mut remove = tokio::spawn(async move {
+            TIER_DRIVER_TEST_FACTORY
+                .scope(
+                    remove_driver_factory,
+                    TierConfigMgr::remove_and_save(&remove_manager, remove_store, "WARM", true),
+                )
+                .await
+        });
+        let prepared = tokio::time::timeout(StdDuration::from_secs(30), async {
+            loop {
+                match TierConfigMgr::acquire_operation_lease(&tier_manager, "WARM").await {
+                    Ok(lease) => drop(lease),
+                    Err(err) if TierConfigMgr::operation_lease_blocked_by_mutation(&err) => break,
+                    Err(err) => panic!("tier remove should only block new operations while cleanup is paused: {err}"),
+                }
+                tokio::task::yield_now().await;
+            }
+        });
+        tokio::select! {
+            prepared = prepared => {
+                prepared.expect("tier remove should install its prepared admission fence");
+            }
+            result = &mut remove => {
+                panic!("tier remove finished before installing its prepared admission fence: {result:?}");
+            }
+        }
+        assert!(!remove.is_finished(), "tier remove must wait for the leased local cleanup commit");
+
+        barrier.release.notify_one();
+        tokio::time::timeout(StdDuration::from_secs(30), cleanup)
+            .await
+            .expect("free-version cleanup should finish after release")
+            .expect("free-version cleanup task should join")
+            .expect("free-version cleanup should keep its generation current");
+        tokio::time::timeout(StdDuration::from_secs(30), remove)
+            .await
+            .expect("tier remove should finish after local cleanup")
+            .expect("tier remove task should join")
+            .expect("tier remove should pass its fresh authoritative proof");
+
+        assert!(!tier_manager.read().await.is_tier_valid("WARM"));
+        for disk_path in &disk_paths {
+            assert!(
+                !fs::try_exists(disk_path.join(&bucket).join(object))
+                    .await
+                    .expect("post-removal free-version path check should succeed")
+            );
+        }
+        ecstore
+            .delete_bucket(&bucket, &DeleteBucketOptions::default())
+            .await
+            .expect("empty free-version test bucket should be removed");
+    }
+
    #[cfg(feature = "test-util")]
    #[tokio::test]
    #[serial]
@@ -41,6 +41,21 @@ where
    com::read_config(api, file).await
 }

+pub(crate) async fn read_config_limited_preserve_empty<S>(api: Arc<S>, file: &str, max_bytes: usize) -> Result<Vec<u8>>
+where
+    S: ObjectIO<
+            Error = Error,
+            RangeSpec = HTTPRangeSpec,
+            HeaderMap = HeaderMap,
+            ObjectOptions = ObjectOptions,
+            ObjectInfo = ObjectInfo,
+            GetObjectReader = GetObjectReader,
+            PutObjectReader = PutObjReader,
+        >,
+{
+    com::read_config_limited_preserve_empty(api, file, max_bytes).await
+}
+
 pub(crate) async fn read_config_with_metadata<S>(api: Arc<S>, file: &str, opts: &ObjectOptions) -> Result<(Vec<u8>, ObjectInfo)>
 where
    S: ObjectIO<
@@ -56,6 +71,26 @@ where
    com::read_config_with_metadata(api, file, opts).await
 }

+pub(crate) async fn read_config_limited_preserve_empty_with_metadata<S>(
+    api: Arc<S>,
+    file: &str,
+    opts: &ObjectOptions,
+    max_bytes: usize,
+) -> Result<(Vec<u8>, ObjectInfo)>
+where
+    S: ObjectIO<
+            Error = Error,
+            RangeSpec = HTTPRangeSpec,
+            HeaderMap = HeaderMap,
+            ObjectOptions = ObjectOptions,
+            ObjectInfo = ObjectInfo,
+            GetObjectReader = GetObjectReader,
+            PutObjectReader = PutObjReader,
+        >,
+{
+    com::read_config_limited_preserve_empty_with_metadata_opts(api, file, opts, max_bytes).await
+}
+
 pub(crate) async fn save_config<S>(api: Arc<S>, file: &str, data: Vec<u8>) -> Result<()>
 where
    S: ObjectIO<
@@ -126,20 +161,30 @@ where
            DeletedObject = DeletedObject,
        >,
 {
-    match api
-        .delete_object(
-            RUSTFS_META_BUCKET,
-            file,
-            ObjectOptions {
-                http_preconditions: Some(HTTPPreconditions {
+    delete_config_if_match_with_opts(api, file, etag, ObjectOptions::default()).await
+}
+
+pub(crate) async fn delete_config_if_match_with_opts<S>(
+    api: Arc<S>,
+    file: &str,
+    etag: &str,
+    mut options: ObjectOptions,
+) -> Result<()>
+where
+    S: ObjectOperations<
+            Error = Error,
+            ObjectInfo = ObjectInfo,
+            ObjectOptions = ObjectOptions,
+            FileInfo = FileInfo,
+            ObjectToDelete = ObjectToDelete,
+            DeletedObject = DeletedObject,
+        >,
+{
+    options.http_preconditions = Some(HTTPPreconditions {
        if_match: Some(etag.to_string()),
        ..Default::default()
-                }),
-                ..Default::default()
-            },
-        )
-        .await
-    {
+    });
+    match api.delete_object(RUSTFS_META_BUCKET, file, options).await {
        Ok(_) => Ok(()),
        Err(err) => {
            if err == Error::FileNotFound || matches!(err, Error::ObjectNotFound(_, _)) {
@@ -15,9 +15,9 @@
 use crate::object_api::ObjectInfo;

 pub use rustfs_lifecycle::{
-    Event, ExpirationOptions, IlmAction, Lifecycle, LifecycleCalculate, ObjectOpts, RuleValidate, TRANSITION_COMPLETE,
-    TRANSITION_PENDING, TransitionOptions, abort_incomplete_multipart_upload_due, expected_expiry_time,
-    expiration_action_has_valid_target,
+    Event, ExpirationOptions, IlmAction, LIFECYCLE_MALFORMED_XML_ERROR_KIND, Lifecycle, LifecycleCalculate, ObjectOpts,
+    RuleValidate, TRANSITION_COMPLETE, TRANSITION_PENDING, TransitionOptions, abort_incomplete_multipart_upload_due,
+    expected_expiry_time, expiration_action_has_valid_target,
 };

 pub fn object_opts_from_object_info(oi: &ObjectInfo) -> ObjectOpts {
@@ -22,7 +22,7 @@ use super::{
    bucket_lifecycle_ops::{
        ManualTransitionQueueSnapshot, ManualTransitionRunReport, decode_manual_transition_continuation_token,
    },
-    manual_transition_job, tier_delete_journal, transition_transaction,
+    manual_transition_job, recovery_control, recovery_disposition, recovery_export, tier_delete_journal, transition_transaction,
 };
 use crate::error::{Error, Result};
 use crate::services::tier::tier_probe_intent;
@@ -41,6 +41,9 @@ pub(crate) enum DurableIlmRecordKind {
    ManualTransitionScope,
    ManualTransitionTask,
    ManualTransitionWorkerResult,
+    RecoveryControl,
+    RecoveryExport,
+    RecoveryDisposition,
 }

 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -105,8 +108,26 @@ pub(crate) const MANUAL_TRANSITION_WORKER_RESULT_NAMESPACE: DurableIlmNamespace
    max_record_size: manual_transition_job::MAX_MANUAL_TRANSITION_WORKER_RESULT_RECORD_SIZE,
    kind: DurableIlmRecordKind::ManualTransitionWorkerResult,
 };
+pub(crate) const RECOVERY_CONTROL_NAMESPACE: DurableIlmNamespace = DurableIlmNamespace {
+    name: "recovery-control",
+    prefix: recovery_control::ILM_RECOVERY_CONTROL_PREFIX,
+    max_record_size: recovery_control::MAX_ILM_RECOVERY_CONTROL_SIZE,
+    kind: DurableIlmRecordKind::RecoveryControl,
+};
+pub(crate) const RECOVERY_EXPORT_NAMESPACE: DurableIlmNamespace = DurableIlmNamespace {
+    name: "recovery-export",
+    prefix: recovery_export::ILM_RECOVERY_EXPORT_PREFIX,
+    max_record_size: recovery_export::MAX_ILM_RECOVERY_EXPORT_SIZE,
+    kind: DurableIlmRecordKind::RecoveryExport,
+};
+pub(crate) const RECOVERY_DISPOSITION_NAMESPACE: DurableIlmNamespace = DurableIlmNamespace {
+    name: "recovery-disposition",
+    prefix: recovery_disposition::ILM_RECOVERY_DISPOSITION_PREFIX,
+    max_record_size: recovery_disposition::MAX_ILM_RECOVERY_DISPOSITION_SIZE,
+    kind: DurableIlmRecordKind::RecoveryDisposition,
+};

-pub(crate) const DURABLE_ILM_NAMESPACES: [DurableIlmNamespace; 9] = [
+pub(crate) const DURABLE_ILM_NAMESPACES: [DurableIlmNamespace; 12] = [
    TIER_DELETE_JOURNAL_NAMESPACE,
    TIER_DELETE_JOURNAL_V6_NAMESPACE,
    TIER_DELETE_DISPATCH_MANIFEST_NAMESPACE,
@@ -116,6 +137,9 @@ pub(crate) const DURABLE_ILM_NAMESPACES: [DurableIlmNamespace; 9] = [
    MANUAL_TRANSITION_SCOPE_NAMESPACE,
    MANUAL_TRANSITION_TASK_NAMESPACE,
    MANUAL_TRANSITION_WORKER_RESULT_NAMESPACE,
+    RECOVERY_CONTROL_NAMESPACE,
+    RECOVERY_EXPORT_NAMESPACE,
+    RECOVERY_DISPOSITION_NAMESPACE,
 ];

 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -241,6 +265,40 @@ pub(crate) enum DurableIlmRecordCheckpoint {
    ManualTransitionWorkerResult {
        content_sha256: String,
    },
+    RecoveryControl {
+        content_sha256: String,
+        identity_sha256: String,
+        source_generation_sha256: String,
+        first_seen_at_unix_nanos: i64,
+        revision: u64,
+        classification: recovery_control::IlmRecoveryClassification,
+        attempt_count: u64,
+        consecutive_failure_count: u32,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        owner_fence_sha256: Option<String>,
+    },
+    RecoveryExport {
+        content_sha256: String,
+        source_generation_sha256: String,
+        topology_generation: String,
+        member_epochs_sha256: String,
+        creator_sha256: String,
+        retain_until_unix_nanos: i64,
+    },
+    RecoveryDisposition {
+        content_sha256: String,
+        identity_sha256: String,
+        copy_manifest_sha256: String,
+        copy_manifest_count: usize,
+        created_at_unix_nanos: i64,
+        revision: u64,
+        state: recovery_disposition::IlmRecoveryDispositionState,
+        owner_fence_sha256: Option<String>,
+        owner_lease_acquired_at_unix_nanos: Option<i64>,
+        owner_lease_expires_at_unix_nanos: Option<i64>,
+        confirmed_absent_sha256: Vec<String>,
+        retain_until_unix_nanos: i64,
+    },
 }

 impl DurableIlmRecordCheckpoint {
@@ -254,7 +312,10 @@ impl DurableIlmRecordCheckpoint {
            | Self::ManualTransitionJob { content_sha256, .. }
            | Self::ManualTransitionScope { content_sha256, .. }
            | Self::ManualTransitionTask { content_sha256 }
-            | Self::ManualTransitionWorkerResult { content_sha256 } => content_sha256,
+            | Self::ManualTransitionWorkerResult { content_sha256 }
+            | Self::RecoveryControl { content_sha256, .. }
+            | Self::RecoveryExport { content_sha256, .. }
+            | Self::RecoveryDisposition { content_sha256, .. } => content_sha256,
        }
    }

@@ -295,6 +356,9 @@ impl DurableIlmRecordCheckpoint {
            {
                return Err(Error::other("durable ILM tier delete journal checkpoint is invalid"));
            }
+            if !recovery_disposition_checkpoint_is_valid(checkpoint) {
+                return Err(Error::other("durable ILM recovery disposition checkpoint is invalid"));
+            }
        }
        if self == next {
            if let Self::ManualTransitionJob {
@@ -435,9 +499,7 @@ impl DurableIlmRecordCheckpoint {
                },
            ) => {
                previous_identity == next_identity
-                    && transition_state_distance(*previous_state, *next_state)
-                        .and_then(|distance| previous_revision.checked_add(distance))
-                        .is_some_and(|expected_revision| *next_revision == expected_revision)
+                    && transition_state_revision_is_successor(*previous_state, *previous_revision, *next_state, *next_revision)
                    && (!previous_remote_version_known || previous_remote_version == next_remote_version)
            }
            (
@@ -528,6 +590,128 @@ impl DurableIlmRecordCheckpoint {
                    ..
                },
            ) => previous_identity == next_identity && next_updated_at > previous_updated_at,
+            (
+                Self::RecoveryControl {
+                    identity_sha256: previous_identity,
+                    source_generation_sha256: previous_generation,
+                    first_seen_at_unix_nanos: previous_first_seen,
+                    revision: previous_revision,
+                    classification: previous_classification,
+                    attempt_count: previous_attempts,
+                    consecutive_failure_count: previous_failures,
+                    owner_fence_sha256: previous_owner,
+                    ..
+                },
+                Self::RecoveryControl {
+                    identity_sha256: next_identity,
+                    source_generation_sha256: next_generation,
+                    first_seen_at_unix_nanos: next_first_seen,
+                    revision: next_revision,
+                    classification: next_classification,
+                    attempt_count: next_attempts,
+                    consecutive_failure_count: next_failures,
+                    owner_fence_sha256: next_owner,
+                    ..
+                },
+            ) => {
+                let adjacent = previous_identity == next_identity
+                    && previous_first_seen == next_first_seen
+                    && previous_revision.checked_add(1) == Some(*next_revision);
+                let claim = next_owner.is_some()
+                    && *previous_classification == recovery_control::IlmRecoveryClassification::Retrying
+                    && *next_classification == recovery_control::IlmRecoveryClassification::Retrying
+                    && previous_attempts.checked_add(1) == Some(*next_attempts)
+                    && previous_failures == next_failures;
+                let source_refresh = previous_owner.is_some()
+                    && previous_owner == next_owner
+                    && *previous_classification == recovery_control::IlmRecoveryClassification::Retrying
+                    && *next_classification == recovery_control::IlmRecoveryClassification::Retrying
+                    && previous_attempts == next_attempts
+                    && previous_failures == next_failures
+                    && previous_generation != next_generation;
+                let completion = previous_owner.is_some()
+                    && next_owner.is_none()
+                    && previous_generation == next_generation
+                    && previous_attempts == next_attempts;
+                adjacent && (claim || source_refresh || completion)
+            }
+            (
+                Self::RecoveryDisposition {
+                    identity_sha256: previous_identity,
+                    copy_manifest_sha256: previous_manifest,
+                    copy_manifest_count: previous_manifest_count,
+                    created_at_unix_nanos: previous_created_at,
+                    revision: previous_revision,
+                    state: previous_state,
+                    owner_fence_sha256: previous_owner,
+                    owner_lease_acquired_at_unix_nanos: previous_owner_acquired,
+                    owner_lease_expires_at_unix_nanos: previous_owner_expires,
+                    confirmed_absent_sha256: previous_confirmed,
+                    retain_until_unix_nanos: previous_retain_until,
+                    ..
+                },
+                Self::RecoveryDisposition {
+                    identity_sha256: next_identity,
+                    copy_manifest_sha256: next_manifest,
+                    copy_manifest_count: next_manifest_count,
+                    created_at_unix_nanos: next_created_at,
+                    revision: next_revision,
+                    state: next_state,
+                    owner_fence_sha256: next_owner,
+                    owner_lease_acquired_at_unix_nanos: next_owner_acquired,
+                    owner_lease_expires_at_unix_nanos: next_owner_expires,
+                    confirmed_absent_sha256: next_confirmed,
+                    retain_until_unix_nanos: next_retain_until,
+                    ..
+                },
+            ) => {
+                use recovery_disposition::IlmRecoveryDispositionState::{Applying, Completed, Prepared};
+
+                let immutable_identity_matches = previous_identity == next_identity
+                    && previous_manifest == next_manifest
+                    && previous_manifest_count == next_manifest_count
+                    && previous_created_at == next_created_at
+                    && previous_retain_until == next_retain_until;
+                let adjacent = previous_revision.checked_add(1) == Some(*next_revision);
+                let progress_is_monotonic = sorted_sha256_set_is_subset(previous_confirmed, next_confirmed);
+                let legal_edge = match (previous_state, next_state) {
+                    (Prepared, Prepared) => {
+                        let claim = previous_owner.is_none() && next_owner.is_some();
+                        let takeover = previous_owner.is_some()
+                            && previous_owner != next_owner
+                            && previous_owner_expires
+                                .zip(*next_owner_acquired)
+                                .is_some_and(|(expires, acquired)| acquired >= expires);
+                        previous_confirmed == next_confirmed && (claim || takeover)
+                    }
+                    (Prepared, Applying) => {
+                        previous_confirmed == next_confirmed
+                            && previous_owner.is_some()
+                            && previous_owner == next_owner
+                            && previous_owner_acquired == next_owner_acquired
+                            && previous_owner_expires == next_owner_expires
+                    }
+                    (Applying, Applying) => {
+                        let progress = previous_owner == next_owner
+                            && previous_owner_acquired == next_owner_acquired
+                            && previous_owner_expires == next_owner_expires
+                            && previous_confirmed.len().checked_add(1) == Some(next_confirmed.len());
+                        let takeover = previous_owner.is_some()
+                            && previous_owner != next_owner
+                            && previous_confirmed == next_confirmed
+                            && previous_owner_expires
+                                .zip(*next_owner_acquired)
+                                .is_some_and(|(expires, acquired)| acquired >= expires);
+                        progress || takeover
+                    }
+                    (Applying, Completed) => {
+                        previous_owner.is_some() && next_owner.is_none() && previous_confirmed == next_confirmed
+                    }
+                    _ => false,
+                };
+
+                immutable_identity_matches && adjacent && progress_is_monotonic && legal_edge
+            }
            _ => false,
        };

@@ -545,6 +729,11 @@ impl DurableIlmRecordCheckpoint {
    /// after the exact terminal ETag and terminal receipt were committed, to
    /// purge older object versions exposed by that deletion.
    pub(crate) fn is_predecessor_of_terminal(&self, terminal: &Self) -> bool {
+        for checkpoint in [self, terminal] {
+            if !recovery_disposition_checkpoint_is_valid(checkpoint) {
+                return false;
+            }
+        }
        if let Self::TierProbeIntent { state, .. } = terminal
            && !matches!(
                state,
@@ -553,6 +742,19 @@ impl DurableIlmRecordCheckpoint {
        {
            return false;
        }
+        if let Self::RecoveryControl { classification, .. } = terminal
+            && !matches!(
+                classification,
+                recovery_control::IlmRecoveryClassification::Terminal | recovery_control::IlmRecoveryClassification::Abandoned
+            )
+        {
+            return false;
+        }
+        if let Self::RecoveryDisposition { state, .. } = terminal
+            && state != &recovery_disposition::IlmRecoveryDispositionState::Completed
+        {
+            return false;
+        }
        if self == terminal || self.validate_successor(terminal).is_ok() {
            return true;
        }
@@ -652,11 +854,147 @@ impl DurableIlmRecordCheckpoint {
                        .is_some_and(|distance| tier_probe_state_reaches(*previous_state, *terminal_state, distance))
                    && (!previous_remote_version_known || previous_remote_version == terminal_remote_version)
            }
+            (
+                Self::RecoveryControl {
+                    identity_sha256: previous_identity,
+                    source_generation_sha256: previous_generation,
+                    first_seen_at_unix_nanos: previous_first_seen,
+                    revision: previous_revision,
+                    attempt_count: previous_attempts,
+                    ..
+                },
+                Self::RecoveryControl {
+                    identity_sha256: terminal_identity,
+                    source_generation_sha256: terminal_generation,
+                    first_seen_at_unix_nanos: terminal_first_seen,
+                    revision: terminal_revision,
+                    attempt_count: terminal_attempts,
+                    classification:
+                        recovery_control::IlmRecoveryClassification::Terminal | recovery_control::IlmRecoveryClassification::Abandoned,
+                    ..
+                },
+            ) => {
+                previous_identity == terminal_identity
+                    && (previous_generation == terminal_generation || terminal_attempts > previous_attempts)
+                    && previous_first_seen == terminal_first_seen
+                    && terminal_revision > previous_revision
+                    && terminal_attempts >= previous_attempts
+            }
+            (
+                Self::RecoveryDisposition {
+                    identity_sha256: previous_identity,
+                    copy_manifest_sha256: previous_manifest,
+                    copy_manifest_count: previous_manifest_count,
+                    created_at_unix_nanos: previous_created_at,
+                    revision: previous_revision,
+                    state: previous_state,
+                    owner_fence_sha256: previous_owner,
+                    confirmed_absent_sha256: previous_confirmed,
+                    retain_until_unix_nanos: previous_retain_until,
+                    ..
+                },
+                Self::RecoveryDisposition {
+                    identity_sha256: terminal_identity,
+                    copy_manifest_sha256: terminal_manifest,
+                    copy_manifest_count: terminal_manifest_count,
+                    created_at_unix_nanos: terminal_created_at,
+                    revision: terminal_revision,
+                    state: recovery_disposition::IlmRecoveryDispositionState::Completed,
+                    confirmed_absent_sha256: terminal_confirmed,
+                    retain_until_unix_nanos: terminal_retain_until,
+                    ..
+                },
+            ) => {
+                matches!(
+                    previous_state,
+                    recovery_disposition::IlmRecoveryDispositionState::Prepared
+                        | recovery_disposition::IlmRecoveryDispositionState::Applying
+                ) && previous_identity == terminal_identity
+                    && previous_manifest == terminal_manifest
+                    && previous_manifest_count == terminal_manifest_count
+                    && previous_created_at == terminal_created_at
+                    && previous_retain_until == terminal_retain_until
+                    && terminal_revision.checked_sub(*previous_revision).is_some_and(|distance| {
+                        let minimum_distance = match previous_state {
+                            recovery_disposition::IlmRecoveryDispositionState::Prepared if previous_owner.is_some() => 3,
+                            recovery_disposition::IlmRecoveryDispositionState::Prepared => 4,
+                            recovery_disposition::IlmRecoveryDispositionState::Applying
+                                if previous_confirmed.len() == *previous_manifest_count =>
+                            {
+                                1
+                            }
+                            recovery_disposition::IlmRecoveryDispositionState::Applying => 2,
+                            recovery_disposition::IlmRecoveryDispositionState::Completed => u64::MAX,
+                        };
+                        distance >= minimum_distance
+                    })
+                    && sorted_sha256_set_is_subset(previous_confirmed, terminal_confirmed)
+            }
            _ => false,
        }
    }
 }

+fn recovery_disposition_checkpoint_is_valid(checkpoint: &DurableIlmRecordCheckpoint) -> bool {
+    use recovery_disposition::IlmRecoveryDispositionState::{Applying, Completed, Prepared};
+
+    let DurableIlmRecordCheckpoint::RecoveryDisposition {
+        content_sha256,
+        identity_sha256,
+        copy_manifest_sha256,
+        copy_manifest_count,
+        created_at_unix_nanos,
+        revision,
+        state,
+        owner_fence_sha256,
+        owner_lease_acquired_at_unix_nanos,
+        owner_lease_expires_at_unix_nanos,
+        confirmed_absent_sha256,
+        retain_until_unix_nanos,
+    } = checkpoint
+    else {
+        return true;
+    };
+    let owner_fence_sha256 = owner_fence_sha256.as_deref();
+
+    is_canonical_sha256(content_sha256)
+        && is_canonical_sha256(identity_sha256)
+        && is_canonical_sha256(copy_manifest_sha256)
+        && *copy_manifest_count > 0
+        && *created_at_unix_nanos > 0
+        && *revision > 0
+        && *retain_until_unix_nanos > 0
+        && owner_fence_sha256.is_none_or(is_canonical_sha256)
+        && match (
+            owner_fence_sha256,
+            *owner_lease_acquired_at_unix_nanos,
+            *owner_lease_expires_at_unix_nanos,
+        ) {
+            (None, None, None) => true,
+            (Some(_), Some(acquired), Some(expires)) => acquired > 0 && expires > acquired,
+            _ => false,
+        }
+        && confirmed_absent_sha256.len() <= *copy_manifest_count
+        && confirmed_absent_sha256.iter().all(|digest| is_canonical_sha256(digest))
+        && confirmed_absent_sha256.windows(2).all(|pair| pair[0] < pair[1])
+        && match *state {
+            Prepared => confirmed_absent_sha256.is_empty(),
+            Applying => owner_fence_sha256.is_some(),
+            Completed => owner_fence_sha256.is_none() && confirmed_absent_sha256.len() == *copy_manifest_count,
+        }
+}
+
+fn is_canonical_sha256(value: &str) -> bool {
+    is_sha256_checksum(value)
+        && !value
+            .bytes()
+            .any(|byte| byte.is_ascii_hexdigit() && byte.is_ascii_uppercase())
+}
+
+fn sorted_sha256_set_is_subset(subset: &[String], superset: &[String]) -> bool {
+    subset.iter().all(|candidate| superset.binary_search(candidate).is_ok())
+}
+
 fn tier_delete_dispatch_parent_progress_delta(
    previous_sequence: u64,
    previous_completed_journals: u64,
@@ -690,6 +1028,22 @@ fn transition_state_distance(
    }
 }

+fn transition_state_revision_is_successor(
+    from: transition_transaction::TransitionTransactionState,
+    from_revision: u64,
+    to: transition_transaction::TransitionTransactionState,
+    to_revision: u64,
+) -> bool {
+    use transition_transaction::TransitionTransactionState::{LocalCommitStarted, UploadOutcomeUnknown};
+
+    if from == UploadOutcomeUnknown && from_revision == 1 && to == LocalCommitStarted {
+        return to_revision == 2;
+    }
+    transition_state_distance(from, to)
+        .and_then(|distance| from_revision.checked_add(distance))
+        .is_some_and(|expected_revision| to_revision == expected_revision)
+}
+
 fn tier_probe_state_reaches(
    from: tier_probe_intent::TierProbeIntentState,
    to: tier_probe_intent::TierProbeIntentState,
@@ -1219,6 +1573,84 @@ pub(crate) fn validate_durable_ilm_record(path: &str, data: &[u8]) -> Result<Val
                },
            )
        }
+        DurableIlmRecordKind::RecoveryControl => {
+            let (protocol, control_id) = recovery_control::recovery_control_id_from_record_object_name(path)
+                .map_err(|err| Error::other(err.to_string()))?;
+            let control =
+                recovery_control::IlmRecoveryControl::decode(&control_id, data).map_err(|err| Error::other(err.to_string()))?;
+            let canonical = recovery_control::recovery_control_record_object_name(protocol, &control_id)
+                .map_err(|err| Error::other(err.to_string()))?;
+            if canonical != path || control.identity.protocol != protocol {
+                return Err(Error::other("ILM recovery control path is not canonical"));
+            }
+            let identity_sha256 = checkpoint_hash(&control.identity)?;
+            let source_generation_sha256 = checkpoint_hash(&control.observed_source_generation)?;
+            let owner_fence_sha256 = control.owner.as_ref().map(checkpoint_hash).transpose()?;
+            (
+                "control_id",
+                control_id,
+                DurableIlmRecordCheckpoint::RecoveryControl {
+                    content_sha256,
+                    identity_sha256,
+                    source_generation_sha256,
+                    first_seen_at_unix_nanos: control.first_seen_at_unix_nanos,
+                    revision: control.revision,
+                    classification: control.classification,
+                    attempt_count: control.attempt_count,
+                    consecutive_failure_count: control.consecutive_failure_count,
+                    owner_fence_sha256,
+                },
+            )
+        }
+        DurableIlmRecordKind::RecoveryExport => {
+            let (protocol, export_id) = recovery_export::recovery_export_id_from_record_object_name(path)?;
+            let export = recovery_export::IlmRecoveryExport::decode(&export_id, data)?;
+            let canonical = recovery_export::recovery_export_record_object_name(protocol, &export_id)?;
+            if canonical != path || export.protocol != protocol {
+                return Err(Error::other("ILM recovery export path is not canonical"));
+            }
+            let source_generation_sha256 = checkpoint_hash(&export.source_generation)?;
+            (
+                "export_id",
+                export_id,
+                DurableIlmRecordCheckpoint::RecoveryExport {
+                    content_sha256,
+                    source_generation_sha256,
+                    topology_generation: export.topology_generation,
+                    member_epochs_sha256: export.member_epochs_sha256,
+                    creator_sha256: export.creator_sha256,
+                    retain_until_unix_nanos: export.retain_until_unix_nanos,
+                },
+            )
+        }
+        DurableIlmRecordKind::RecoveryDisposition => {
+            // The disposition module owns strict schema, checksum, canonical
+            // path, immutable-manifest, and state-specific validation. Keep
+            // this boundary limited to decommission identity/checkpoint
+            // projection so the two readers cannot accept different records.
+            let disposition = recovery_disposition::decode_recovery_disposition_checkpoint(path, data)?;
+            if disposition.content_sha256 != content_sha256 {
+                return Err(Error::other("ILM recovery disposition checkpoint content digest is invalid"));
+            }
+            (
+                "disposition_id",
+                disposition.disposition_id,
+                DurableIlmRecordCheckpoint::RecoveryDisposition {
+                    content_sha256: disposition.content_sha256,
+                    identity_sha256: disposition.identity_sha256,
+                    copy_manifest_sha256: disposition.copy_manifest_sha256,
+                    copy_manifest_count: disposition.copy_manifest_count,
+                    created_at_unix_nanos: disposition.created_at_unix_nanos,
+                    revision: disposition.revision,
+                    state: disposition.state,
+                    owner_fence_sha256: disposition.owner_fence_sha256,
+                    owner_lease_acquired_at_unix_nanos: disposition.owner_lease_acquired_at_unix_nanos,
+                    owner_lease_expires_at_unix_nanos: disposition.owner_lease_expires_at_unix_nanos,
+                    confirmed_absent_sha256: disposition.confirmed_absent_sha256,
+                    retain_until_unix_nanos: disposition.retain_until_unix_nanos,
+                },
+            )
+        }
        DurableIlmRecordKind::ManualTransitionJob => {
            let job_id = manual_transition_job::manual_transition_job_id_from_record_object_name(path)
                .map_err(|err| Error::other(err.to_string()))?;
@@ -1374,6 +1806,203 @@ mod tests {
        }
    }

+    fn recovery_disposition_checkpoint(
+        revision: u64,
+        state: recovery_disposition::IlmRecoveryDispositionState,
+        owner_fence: Option<&str>,
+        confirmed_absent_sha256: Vec<String>,
+    ) -> DurableIlmRecordCheckpoint {
+        let (owner_lease_acquired_at_unix_nanos, owner_lease_expires_at_unix_nanos) = match owner_fence {
+            Some("f") => (Some(10), Some(20)),
+            Some(_) => (Some(1), Some(10)),
+            None => (None, None),
+        };
+        DurableIlmRecordCheckpoint::RecoveryDisposition {
+            content_sha256: format!("{revision:064x}"),
+            identity_sha256: "a".repeat(64),
+            copy_manifest_sha256: "d".repeat(64),
+            copy_manifest_count: 2,
+            created_at_unix_nanos: 1_700_000_000_000_000_000,
+            revision,
+            state,
+            owner_fence_sha256: owner_fence.map(|digest| digest.repeat(64)),
+            owner_lease_acquired_at_unix_nanos,
+            owner_lease_expires_at_unix_nanos,
+            confirmed_absent_sha256,
+            retain_until_unix_nanos: 1_820_000_000_000_000_000,
+        }
+    }
+
+    #[test]
+    fn recovery_disposition_namespace_is_registered_without_shadowing_its_root() {
+        let disposition_id = "a".repeat(64);
+        let path = format!(
+            "{}/tier_delete_journal/{}/{}/{}.json",
+            recovery_disposition::ILM_RECOVERY_DISPOSITION_PREFIX,
+            &disposition_id[..2],
+            &disposition_id[2..4],
+            disposition_id
+        );
+        let namespace = classify_durable_ilm_record(&path)
+            .expect("recovery disposition path should classify")
+            .expect("recovery disposition should be durable");
+
+        assert_eq!(namespace, &RECOVERY_DISPOSITION_NAMESPACE);
+        assert!(classify_durable_ilm_record(recovery_disposition::ILM_RECOVERY_DISPOSITION_PREFIX).is_err());
+    }
+
+    #[test]
+    fn recovery_disposition_checkpoint_accepts_only_monotonic_progress() {
+        use recovery_disposition::IlmRecoveryDispositionState::{Applying, Completed, Prepared};
+
+        let first_copy = "b".repeat(64);
+        let second_copy = "c".repeat(64);
+        let prepared = recovery_disposition_checkpoint(1, Prepared, None, Vec::new());
+        let claimed = recovery_disposition_checkpoint(2, Prepared, Some("e"), Vec::new());
+        let applying = recovery_disposition_checkpoint(3, Applying, Some("e"), Vec::new());
+        let first_absent = recovery_disposition_checkpoint(4, Applying, Some("e"), vec![first_copy.clone()]);
+        let taken_over = recovery_disposition_checkpoint(5, Applying, Some("f"), vec![first_copy.clone()]);
+        let all_absent = recovery_disposition_checkpoint(6, Applying, Some("f"), vec![first_copy.clone(), second_copy.clone()]);
+        let completed = recovery_disposition_checkpoint(7, Completed, None, vec![first_copy.clone(), second_copy.clone()]);
+
+        prepared
+            .validate_successor(&claimed)
+            .expect("Prepared should record an owner claim without absence progress");
+        claimed
+            .validate_successor(&applying)
+            .expect("Prepared should advance to Applying without folding in deletion progress");
+        applying
+            .validate_successor(&first_absent)
+            .expect("Applying should append newly confirmed absent copies");
+        first_absent
+            .validate_successor(&taken_over)
+            .expect("Applying should record a fenced owner takeover without losing progress");
+        taken_over
+            .validate_successor(&all_absent)
+            .expect("Applying should preserve every earlier confirmation while making progress");
+        all_absent
+            .validate_successor(&completed)
+            .expect("a fully confirmed manifest should advance to Completed");
+
+        assert!(
+            prepared.validate_successor(&completed).is_err(),
+            "adjacent receipt updates must not skip Applying"
+        );
+        assert!(
+            first_absent
+                .validate_successor(&recovery_disposition_checkpoint(5, Applying, Some("e"), Vec::new()))
+                .is_err(),
+            "confirmed-absent progress must not move backwards"
+        );
+        assert!(
+            applying
+                .validate_successor(&recovery_disposition_checkpoint(4, Completed, None, vec![first_copy.clone()]))
+                .is_err(),
+            "Completed must cover the complete immutable copy manifest"
+        );
+        assert!(
+            completed
+                .validate_successor(&recovery_disposition_checkpoint(7, Applying, Some("e"), vec![second_copy]))
+                .is_err(),
+            "Completed is terminal"
+        );
+        assert!(
+            first_absent
+                .validate_successor(&recovery_disposition_checkpoint(5, Applying, Some("e"), vec![first_copy.clone()]))
+                .is_err(),
+            "a same-state revision bump must change the owner fence or absence progress"
+        );
+        assert!(
+            applying
+                .validate_successor(&recovery_disposition_checkpoint(4, Applying, None, vec![first_copy]))
+                .is_err(),
+            "Applying must retain a fenced owner"
+        );
+
+        let mut noncanonical_identity = claimed.clone();
+        if let DurableIlmRecordCheckpoint::RecoveryDisposition { identity_sha256, .. } = &mut noncanonical_identity {
+            *identity_sha256 = "A".repeat(64);
+        }
+        assert!(prepared.validate_successor(&noncanonical_identity).is_err());
+        let mut changed_created_at = claimed;
+        if let DurableIlmRecordCheckpoint::RecoveryDisposition {
+            created_at_unix_nanos, ..
+        } = &mut changed_created_at
+        {
+            *created_at_unix_nanos += 1;
+        }
+        assert!(prepared.validate_successor(&changed_created_at).is_err());
+
+        let mut early_takeover = taken_over;
+        if let DurableIlmRecordCheckpoint::RecoveryDisposition {
+            owner_lease_acquired_at_unix_nanos,
+            ..
+        } = &mut early_takeover
+        {
+            *owner_lease_acquired_at_unix_nanos = Some(9);
+        }
+        assert!(first_absent.validate_successor(&early_takeover).is_err());
+        assert!(
+            applying
+                .validate_successor(&recovery_disposition_checkpoint(
+                    4,
+                    Applying,
+                    Some("e"),
+                    vec!["c".repeat(64), "b".repeat(64)],
+                ))
+                .is_err(),
+            "confirmed-absent entries must be a canonical sorted set"
+        );
+    }
+
+    #[test]
+    fn recovery_disposition_terminal_predecessor_requires_exact_identity_and_full_manifest() {
+        use recovery_disposition::IlmRecoveryDispositionState::{Applying, Completed, Prepared};
+
+        let first_copy = "b".repeat(64);
+        let second_copy = "c".repeat(64);
+        let prepared = recovery_disposition_checkpoint(1, Prepared, None, Vec::new());
+        let applying = recovery_disposition_checkpoint(3, Applying, Some("e"), vec![first_copy.clone()]);
+        let completed = recovery_disposition_checkpoint(5, Completed, None, vec![first_copy.clone(), second_copy]);
+
+        assert!(prepared.is_predecessor_of_terminal(&completed));
+        assert!(applying.is_predecessor_of_terminal(&completed));
+        assert!(
+            !prepared.is_predecessor_of_terminal(&recovery_disposition_checkpoint(2, Applying, Some("e"), Vec::new())),
+            "a nonterminal disposition must not authorize terminal cleanup"
+        );
+        assert!(
+            !prepared.is_predecessor_of_terminal(&recovery_disposition_checkpoint(
+                4,
+                Completed,
+                None,
+                vec![first_copy.clone(), "c".repeat(64)],
+            )),
+            "terminal proof must leave enough revisions for claim, apply, progress, and completion"
+        );
+        assert!(
+            !applying.is_predecessor_of_terminal(&recovery_disposition_checkpoint(
+                4,
+                Completed,
+                None,
+                vec![first_copy.clone(), "c".repeat(64)],
+            )),
+            "an incomplete Applying checkpoint cannot complete without a progress generation"
+        );
+
+        let mut other_identity = completed;
+        if let DurableIlmRecordCheckpoint::RecoveryDisposition { identity_sha256, .. } = &mut other_identity {
+            *identity_sha256 = "e".repeat(64);
+        }
+        assert!(!prepared.is_predecessor_of_terminal(&other_identity));
+
+        let incomplete_terminal = recovery_disposition_checkpoint(4, Completed, None, vec![first_copy]);
+        assert!(
+            !prepared.is_predecessor_of_terminal(&incomplete_terminal),
+            "a partial confirmed-absent set must not become terminal proof"
+        );
+    }
+
    fn tier_probe_intent_fixture() -> tier_probe_intent::TierProbeIntent {
        let probe_id = Uuid::parse_str("36e2220e-9ad2-495b-b3bc-c4d2caf70a31").expect("fixture uuid should parse");
        tier_probe_intent::TierProbeIntent {
@@ -1412,6 +2041,94 @@ mod tests {
            .checkpoint
    }

+    fn recovery_control_fixture() -> recovery_control::IlmRecoveryControl {
+        let source_path = "ilm/transition-transactions/records/12/34/1234567890abcdef1234567890abcdef.json";
+        let generation = recovery_control::IlmRecoverySourceGeneration::new(
+            transition_transaction::TRANSITION_TRANSACTION_SCHEMA,
+            "source-etag",
+            "a".repeat(64),
+            vec![recovery_control::IlmRecoverySourceCopy {
+                authority: "pool-0/set-0".to_string(),
+                canonical_path: source_path.to_string(),
+                etag: "source-etag".to_string(),
+                encoded_len: 128,
+                content_sha256: "a".repeat(64),
+            }],
+        )
+        .expect("source generation should build");
+        recovery_control::IlmRecoveryControl::new(
+            recovery_control::IlmRecoveryControlIdentity {
+                protocol: recovery_control::IlmRecoveryProtocol::TransitionTransaction,
+                canonical_source_path: source_path.to_string(),
+                stable_operation_identity: "12345678-90ab-cdef-1234-567890abcdef".to_string(),
+                record_class: "transition_transaction_v1".to_string(),
+            },
+            generation,
+            recovery_control::IlmRecoveryClassification::Retrying,
+            1_000_000_000,
+            recovery_control::IlmRecoveryErrorCode::None,
+        )
+        .expect("recovery control should build")
+    }
+
+    fn recovery_control_checkpoint(control: &recovery_control::IlmRecoveryControl) -> DurableIlmRecordCheckpoint {
+        let control_id = control.identity.source_operation_digest().expect("control id should derive");
+        let path = recovery_control::recovery_control_record_object_name(control.identity.protocol, &control_id)
+            .expect("control path should build");
+        let encoded = control.encode().expect("control should encode");
+        let namespace = classify_durable_ilm_record(&path)
+            .expect("recovery control namespace should classify")
+            .expect("recovery control should be durable");
+        assert_eq!(namespace, &RECOVERY_CONTROL_NAMESPACE);
+        validate_durable_ilm_record(&path, &encoded)
+            .expect("recovery control should validate")
+            .checkpoint
+    }
+
+    #[test]
+    fn recovery_control_checkpoint_tracks_claim_retry_and_terminal_generations() {
+        let initial_control = recovery_control_fixture();
+        let initial = recovery_control_checkpoint(&initial_control);
+
+        let mut claimed_control = initial_control;
+        let mut advanced_generation = claimed_control.observed_source_generation.clone();
+        advanced_generation.source_schema = "rustfs-transition-transaction-v2".to_string();
+        claimed_control
+            .claim_for_source_generation("node-a", Uuid::new_v4(), 2_000_000_000, 300_000_000_000, advanced_generation)
+            .expect("control should claim");
+        let claimed = recovery_control_checkpoint(&claimed_control);
+        initial.validate_successor(&claimed).expect("claim should advance receipt");
+
+        let mut retry_control = claimed_control;
+        retry_control
+            .record_retryable_failure(3_000_000_000, recovery_control::IlmRecoveryErrorCode::BackendTimeout)
+            .expect("retry should persist");
+        let retry = recovery_control_checkpoint(&retry_control);
+        claimed.validate_successor(&retry).expect("retry should advance receipt");
+
+        let ready_at = retry_control
+            .next_attempt_at_unix_nanos
+            .expect("retry deadline should persist");
+        let mut terminal_control = retry_control;
+        terminal_control
+            .claim("node-b", Uuid::new_v4(), ready_at, 300_000_000_000)
+            .expect("retry should claim");
+        let reclaimed = recovery_control_checkpoint(&terminal_control);
+        retry.validate_successor(&reclaimed).expect("reclaim should advance receipt");
+        terminal_control
+            .finish_attempt(
+                recovery_control::IlmRecoveryClassification::Terminal,
+                recovery_control::IlmRecoveryErrorCode::None,
+            )
+            .expect("control should terminate");
+        let terminal = recovery_control_checkpoint(&terminal_control);
+        reclaimed
+            .validate_successor(&terminal)
+            .expect("terminal state should advance receipt");
+        assert!(initial.is_predecessor_of_terminal(&terminal));
+        assert!(!initial.is_predecessor_of_terminal(&retry));
+    }
+
    #[test]
    fn tier_probe_intent_checkpoint_tracks_exact_monotonic_generations() {
        let initial_intent = tier_probe_intent_fixture();
@@ -1470,6 +2187,64 @@ mod tests {
        );
    }

+    #[test]
+    fn transition_checkpoint_accepts_only_the_distinguishable_compact_edge() {
+        let identity_sha256 = "a".repeat(64);
+        let unknown_remote_sha256 = "b".repeat(64);
+        let known_remote_sha256 = "c".repeat(64);
+        let checkpoint = |revision, state, remote_version_sha256: String, remote_version_known| {
+            DurableIlmRecordCheckpoint::TransitionTransaction {
+                content_sha256: format!("{revision:064x}"),
+                identity_sha256: identity_sha256.clone(),
+                remote_version_sha256,
+                remote_version_known,
+                revision,
+                state,
+            }
+        };
+        let compact_unknown = checkpoint(
+            1,
+            transition_transaction::TransitionTransactionState::UploadOutcomeUnknown,
+            unknown_remote_sha256.clone(),
+            false,
+        );
+        let compact_local_commit = checkpoint(
+            2,
+            transition_transaction::TransitionTransactionState::LocalCommitStarted,
+            known_remote_sha256.clone(),
+            true,
+        );
+        compact_unknown
+            .validate_successor(&compact_local_commit)
+            .expect("compact pre-upload fence should advance directly to the exact local-commit fence");
+
+        let legacy_unknown = checkpoint(
+            2,
+            transition_transaction::TransitionTransactionState::UploadOutcomeUnknown,
+            unknown_remote_sha256,
+            false,
+        );
+        let invalid_legacy_skip = checkpoint(
+            3,
+            transition_transaction::TransitionTransactionState::LocalCommitStarted,
+            known_remote_sha256.clone(),
+            true,
+        );
+        assert!(
+            legacy_unknown.validate_successor(&invalid_legacy_skip).is_err(),
+            "legacy UploadOutcomeUnknown@2 must not masquerade as the compact edge"
+        );
+        let valid_legacy_skip = checkpoint(
+            4,
+            transition_transaction::TransitionTransactionState::LocalCommitStarted,
+            known_remote_sha256,
+            true,
+        );
+        legacy_unknown
+            .validate_successor(&valid_legacy_skip)
+            .expect("legacy receipts may still observe the existing two-edge state advance");
+    }
+
    #[test]
    fn tier_delete_dispatch_manifest_namespace_validates_monotonic_branches() {
        use tier_delete_journal::TierDeleteDispatchManifestState::{Aborted, Aborting, Completed, DispatchAuthorized, Preparing};
@@ -24,6 +24,10 @@ pub(crate) use metadata_boundary::{LifecycleExpiryConfigs, get_expiry_configs, g
 mod object_handlers_common;
 mod object_lock_boundary;
 pub use self::core as lifecycle;
+pub mod recovery_control;
+pub mod recovery_disposition;
+pub(crate) mod recovery_disposition_runtime;
+pub mod recovery_export;
 mod replication_sink;
 pub mod rule;
 mod runtime_boundary;
@@ -0,0 +1,840 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use std::{collections::HashSet, sync::Arc};
+
+use rustfs_utils::crypto::{hex_sha256, is_sha256_checksum};
+use serde::{Deserialize, Serialize};
+
+use super::config_boundary;
+use super::recovery_control::{
+    IlmRecoveryClassification, IlmRecoveryControl, IlmRecoveryProtocol, IlmRecoverySourceCopy, IlmRecoverySourceGeneration,
+    MAX_ILM_RECOVERY_CONTROL_SIZE, ObservedIlmRecoveryControl, ObservedIlmRecoverySource, recovery_control_record_object_name,
+};
+use super::tier_delete_journal::{
+    TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA, validate_legacy_tier_delete_recovery_source,
+};
+use crate::disk::RUSTFS_META_BUCKET;
+use crate::error::{Error, Result};
+use crate::object_api::{ObjectOptions, WriteCompletion};
+use crate::services::notification_sys::{
+    acquire_ilm_recovery_export_fleet_proof, ilm_recovery_export_fleet_proof_matches, ilm_recovery_export_member_epochs_sha256,
+    ilm_recovery_export_topology_generation,
+};
+use crate::storage_api_contracts::{list::ListOperations as _, namespace::NamespaceLocking as _, object::HTTPPreconditions};
+use crate::store::ECStore;
+
+pub const ILM_RECOVERY_EXPORT_SCHEMA: &str = "rustfs-ilm-recovery-export-v1";
+pub const ILM_RECOVERY_EXPORT_PREFIX: &str = "ilm/recovery-exports";
+pub const MAX_ILM_RECOVERY_EXPORT_SIZE: usize = 128 * 1024;
+const MAX_ILM_RECOVERY_EXPORTS: usize = 10_000;
+const MAX_ILM_RECOVERY_EXPORT_BYTES: u64 = 1024 * 1024 * 1024;
+const MAX_ACTOR_EXPORTS_PER_MINUTE: usize = 10;
+const MAX_CLUSTER_EXPORTS_PER_MINUTE: usize = 100;
+const EXPORT_RETENTION_NANOS: i64 = 90 * 24 * 60 * 60 * 1_000_000_000;
+const EXPORT_ADMISSION_LOCK: &str = "ilm/recovery-admission/export.lock";
+const MAX_LEGACY_TIER_DELETE_SOURCE_SIZE: usize = 64 * 1024;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct IlmRecoveryExportObservation {
+    pub control_id: String,
+    pub protocol: IlmRecoveryProtocol,
+    pub control_etag: String,
+    pub control_revision: u64,
+    pub classification: IlmRecoveryClassification,
+    pub canonical_source_path: String,
+    pub source_generation: IlmRecoverySourceGeneration,
+    pub topology_generation: String,
+    pub member_epochs_sha256: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct IlmRecoveryExport {
+    pub export_id: String,
+    pub control_id: String,
+    pub protocol: IlmRecoveryProtocol,
+    pub control_etag: String,
+    pub control_revision: u64,
+    pub classification: IlmRecoveryClassification,
+    pub canonical_source_path: String,
+    pub source_generation: IlmRecoverySourceGeneration,
+    pub topology_generation: String,
+    pub member_epochs_sha256: String,
+    pub creator_sha256: String,
+    pub created_at_unix_nanos: i64,
+    pub retain_until_unix_nanos: i64,
+    pub source_bytes_base64: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+struct PersistedIlmRecoveryExport {
+    schema: String,
+    content_sha256: String,
+    export: IlmRecoveryExport,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
+pub struct IlmRecoveryExportCreated {
+    pub export_id: String,
+    pub content_sha256: String,
+    pub encoded: Vec<u8>,
+    pub replayed: bool,
+}
+
+impl IlmRecoveryExport {
+    fn validate(&self) -> Result<()> {
+        self.source_generation.validate().map_err(Error::other)?;
+        validate_sha256(&self.export_id, "ILM recovery export ID is invalid")?;
+        validate_sha256(&self.control_id, "ILM recovery export control ID is invalid")?;
+        validate_sha256(&self.topology_generation, "ILM recovery export topology generation is invalid")?;
+        validate_sha256(&self.member_epochs_sha256, "ILM recovery export member epoch digest is invalid")?;
+        validate_sha256(&self.creator_sha256, "ILM recovery export creator digest is invalid")?;
+        if self.protocol != IlmRecoveryProtocol::TierDeleteJournal
+            || self.classification != IlmRecoveryClassification::RetainedAmbiguous
+            || !is_legacy_export_schema(&self.source_generation.source_schema)
+        {
+            return Err(Error::other("ILM recovery export source is not an exportable legacy journal"));
+        }
+        if self.control_etag.trim().is_empty() || self.control_revision == 0 {
+            return Err(Error::other("ILM recovery export control generation is invalid"));
+        }
+        if self.canonical_source_path.is_empty()
+            || self.canonical_source_path.starts_with('/')
+            || self.canonical_source_path.ends_with('/')
+            || self.canonical_source_path.split('/').any(str::is_empty)
+        {
+            return Err(Error::other("ILM recovery export source path is invalid"));
+        }
+        if self.created_at_unix_nanos <= 0
+            || self.retain_until_unix_nanos < self.created_at_unix_nanos.saturating_add(EXPORT_RETENTION_NANOS)
+        {
+            return Err(Error::other("ILM recovery export retention is invalid"));
+        }
+        let source = base64_simd::STANDARD
+            .decode_to_vec(self.source_bytes_base64.as_bytes())
+            .map_err(|_| Error::other("ILM recovery export source encoding is invalid"))?;
+        validate_legacy_tier_delete_recovery_source(&self.canonical_source_path, &self.source_generation.source_schema, &source)?;
+        let encoded_len = u64::try_from(source.len()).map_err(|_| Error::other("ILM recovery export source length overflow"))?;
+        if source.is_empty()
+            || source.len() > MAX_LEGACY_TIER_DELETE_SOURCE_SIZE
+            || hex_sha256(&source, ToOwned::to_owned) != self.source_generation.content_sha256
+            || self.source_generation.copies.iter().any(|copy| {
+                copy.canonical_path != self.canonical_source_path
+                    || copy.etag != self.source_generation.source_etag
+                    || copy.content_sha256 != self.source_generation.content_sha256
+                    || copy.encoded_len != encoded_len
+            })
+        {
+            return Err(Error::other("ILM recovery export source bytes do not match the observed generation"));
+        }
+        if recovery_export_id(&self.control_id, &self.source_generation)? != self.export_id {
+            return Err(Error::other("ILM recovery export ID does not match its source generation"));
+        }
+        Ok(())
+    }
+
+    pub fn encode(&self) -> Result<Vec<u8>> {
+        self.validate()?;
+        let export_bytes = serde_json::to_vec(self).map_err(Error::other)?;
+        let persisted = PersistedIlmRecoveryExport {
+            schema: ILM_RECOVERY_EXPORT_SCHEMA.to_string(),
+            content_sha256: hex_sha256(&export_bytes, ToOwned::to_owned),
+            export: self.clone(),
+        };
+        let encoded = serde_json::to_vec(&persisted).map_err(Error::other)?;
+        if encoded.len() > MAX_ILM_RECOVERY_EXPORT_SIZE {
+            return Err(Error::other("encoded ILM recovery export exceeds maximum size"));
+        }
+        Ok(encoded)
+    }
+
+    pub fn decode(expected_export_id: &str, data: &[u8]) -> Result<Self> {
+        validate_sha256(expected_export_id, "ILM recovery export ID is invalid")?;
+        if data.len() > MAX_ILM_RECOVERY_EXPORT_SIZE {
+            return Err(Error::other("encoded ILM recovery export exceeds maximum size"));
+        }
+        let persisted: PersistedIlmRecoveryExport = serde_json::from_slice(data).map_err(Error::other)?;
+        if persisted.schema != ILM_RECOVERY_EXPORT_SCHEMA {
+            return Err(Error::other("ILM recovery export schema is unsupported"));
+        }
+        validate_sha256(&persisted.content_sha256, "ILM recovery export checksum is invalid")?;
+        let export_bytes = serde_json::to_vec(&persisted.export).map_err(Error::other)?;
+        if hex_sha256(&export_bytes, ToOwned::to_owned) != persisted.content_sha256 {
+            return Err(Error::other("ILM recovery export checksum mismatch"));
+        }
+        persisted.export.validate()?;
+        if persisted.export.export_id != expected_export_id {
+            return Err(Error::other("ILM recovery export ID does not match record key"));
+        }
+        Ok(persisted.export)
+    }
+}
+
+pub fn recovery_export_record_object_name(protocol: IlmRecoveryProtocol, export_id: &str) -> Result<String> {
+    validate_sha256(export_id, "ILM recovery export ID is invalid")?;
+    Ok(format!(
+        "{}/{}/{}/{}/{}.json",
+        ILM_RECOVERY_EXPORT_PREFIX,
+        protocol.as_str(),
+        &export_id[..2],
+        &export_id[2..4],
+        export_id
+    ))
+}
+
+pub fn recovery_export_id_from_record_object_name(object: &str) -> Result<(IlmRecoveryProtocol, String)> {
+    let suffix = object
+        .strip_prefix(ILM_RECOVERY_EXPORT_PREFIX)
+        .and_then(|suffix| suffix.strip_prefix('/'))
+        .ok_or_else(|| Error::other("ILM recovery export path has wrong prefix"))?;
+    let mut parts = suffix.split('/');
+    let protocol = match parts.next() {
+        Some("tier_delete_journal") => IlmRecoveryProtocol::TierDeleteJournal,
+        _ => return Err(Error::other("ILM recovery export protocol is invalid")),
+    };
+    let shard_a = parts
+        .next()
+        .ok_or_else(|| Error::other("ILM recovery export path is incomplete"))?;
+    let shard_b = parts
+        .next()
+        .ok_or_else(|| Error::other("ILM recovery export path is incomplete"))?;
+    let export_id = parts
+        .next()
+        .and_then(|name| name.strip_suffix(".json"))
+        .ok_or_else(|| Error::other("ILM recovery export suffix is invalid"))?;
+    if parts.next().is_some() {
+        return Err(Error::other("ILM recovery export path is not canonical"));
+    }
+    validate_sha256(export_id, "ILM recovery export ID is invalid")?;
+    if shard_a != &export_id[..2] || shard_b != &export_id[2..4] {
+        return Err(Error::other("ILM recovery export shard does not match export ID"));
+    }
+    Ok((protocol, export_id.to_string()))
+}
+
+pub async fn inspect_recovery_export_observation(api: Arc<ECStore>, control_id: &str) -> Result<IlmRecoveryExportObservation> {
+    let proof = acquire_ilm_recovery_export_fleet_proof()
+        .await
+        .ok_or_else(|| Error::other("ILM recovery export fleet proof is unavailable"))?;
+    let observed_control = load_exportable_control(api.clone(), control_id).await?;
+    let observed_source = observe_export_source(
+        api,
+        &observed_control.control.identity.canonical_source_path,
+        &observed_control.control.observed_source_generation.source_schema,
+    )
+    .await?;
+    if !observed_source.is_consistent()
+        || observed_source.generation != observed_control.control.observed_source_generation
+        || !ilm_recovery_export_fleet_proof_matches(&proof).await
+    {
+        return Err(Error::other("ILM recovery export observation changed or is incomplete"));
+    }
+    Ok(IlmRecoveryExportObservation {
+        control_id: control_id.to_string(),
+        protocol: observed_control.control.identity.protocol,
+        control_etag: observed_control.etag,
+        control_revision: observed_control.control.revision,
+        classification: observed_control.control.classification,
+        canonical_source_path: observed_control.control.identity.canonical_source_path,
+        source_generation: observed_source.generation,
+        topology_generation: ilm_recovery_export_topology_generation(&proof),
+        member_epochs_sha256: ilm_recovery_export_member_epochs_sha256(&proof),
+    })
+}
+
+pub async fn create_recovery_export(
+    api: Arc<ECStore>,
+    observation: &IlmRecoveryExportObservation,
+    creator_sha256: &str,
+) -> Result<IlmRecoveryExportCreated> {
+    validate_sha256(creator_sha256, "ILM recovery export creator digest is invalid")?;
+    let lock = api.new_ns_lock(RUSTFS_META_BUCKET, EXPORT_ADMISSION_LOCK).await?;
+    let admission_guard = lock.get_write_lock(crate::set_disk::get_lock_acquire_timeout()).await?;
+
+    let proof = acquire_ilm_recovery_export_fleet_proof()
+        .await
+        .ok_or_else(|| Error::other("ILM recovery export fleet proof is unavailable"))?;
+    if ilm_recovery_export_topology_generation(&proof) != observation.topology_generation
+        || ilm_recovery_export_member_epochs_sha256(&proof) != observation.member_epochs_sha256
+    {
+        return Err(Error::PreconditionFailed);
+    }
+    let control_object = recovery_control_record_object_name(IlmRecoveryProtocol::TierDeleteJournal, &observation.control_id)
+        .map_err(Error::other)?;
+    let control_lock = api.new_ns_lock(RUSTFS_META_BUCKET, &control_object).await?;
+    let control_guard = control_lock
+        .get_read_lock(crate::set_disk::get_lock_acquire_timeout())
+        .await?;
+    let source_lock = api
+        .new_ns_lock(RUSTFS_META_BUCKET, &observation.canonical_source_path)
+        .await?;
+    let source_guard = source_lock.get_read_lock(crate::set_disk::get_lock_acquire_timeout()).await?;
+    let locks_current = || !admission_guard.is_lock_lost() && !control_guard.is_lock_lost() && !source_guard.is_lock_lost();
+    let (current, current_source_bytes) = current_observation_under_proof_no_lock(api.clone(), observation, &proof).await?;
+    if &current != observation || !locks_current() {
+        return Err(Error::PreconditionFailed);
+    }
+    let current_source_base64 = base64_simd::STANDARD.encode_to_string(current_source_bytes);
+    let candidate_export_id = recovery_export_id(&current.control_id, &current.source_generation)?;
+    let object = recovery_export_record_object_name(current.protocol, &candidate_export_id)?;
+    match load_recovery_export_decoded(api.clone(), &candidate_export_id).await {
+        Ok((existing, export)) if export_matches_observation(&export, observation) => {
+            if !locks_current() || !ilm_recovery_export_fleet_proof_matches(&proof).await {
+                return Err(Error::PreconditionFailed);
+            }
+            api.record_durable_ilm_decommission_progress(&object, &existing.encoded)
+                .await?;
+            if !locks_current() {
+                return Err(Error::PreconditionFailed);
+            }
+            return Ok(existing.with_replayed());
+        }
+        Ok(_) => return Err(Error::PreconditionFailed),
+        Err(Error::ConfigNotFound) => {}
+        Err(err) => return Err(err),
+    }
+    let inventory = collect_export_inventory(api.clone()).await?;
+    if !locks_current() || !ilm_recovery_export_fleet_proof_matches(&proof).await {
+        return Err(Error::PreconditionFailed);
+    }
+    let created_at_unix_nanos = now_unix_nanos()?;
+    let export = build_export_from_source(&current, creator_sha256, created_at_unix_nanos, &current_source_base64)?;
+    let encoded = export.encode()?;
+    inventory.check(creator_sha256, encoded.len(), created_at_unix_nanos)?;
+
+    let mut write_options = ObjectOptions {
+        max_parity: true,
+        write_completion: WriteCompletion::TailDrained,
+        http_preconditions: Some(HTTPPreconditions {
+            if_none_match: Some("*".to_string()),
+            ..Default::default()
+        }),
+        ..Default::default()
+    };
+    write_options.add_namespace_lock_guard(&admission_guard);
+    write_options.add_namespace_lock_guard(&control_guard);
+    write_options.add_namespace_lock_guard(&source_guard);
+    if !locks_current() {
+        return Err(Error::PreconditionFailed);
+    }
+    let write_result = config_boundary::save_config_with_opts(api.clone(), &object, encoded.clone(), &write_options).await;
+    let stored = match load_recovery_export(api.clone(), &export.export_id).await {
+        Ok(stored) if stored.encoded == encoded => stored,
+        Ok(_) => return Err(Error::PreconditionFailed),
+        Err(read_err) => return Err(write_result.err().unwrap_or(read_err)),
+    };
+    if !locks_current() || !ilm_recovery_export_fleet_proof_matches(&proof).await {
+        return Err(Error::PreconditionFailed);
+    }
+    api.record_durable_ilm_decommission_progress(&object, &encoded).await?;
+    if !locks_current() {
+        return Err(Error::PreconditionFailed);
+    }
+    Ok(stored)
+}
+
+pub async fn load_recovery_export(api: Arc<ECStore>, export_id: &str) -> Result<IlmRecoveryExportCreated> {
+    let (created, _) = load_recovery_export_decoded(api, export_id).await?;
+    Ok(created)
+}
+
+async fn load_recovery_export_decoded(
+    api: Arc<ECStore>,
+    export_id: &str,
+) -> Result<(IlmRecoveryExportCreated, IlmRecoveryExport)> {
+    let object = recovery_export_record_object_name(IlmRecoveryProtocol::TierDeleteJournal, export_id)?;
+    let encoded = config_boundary::read_config_limited_preserve_empty(api, &object, MAX_ILM_RECOVERY_EXPORT_SIZE).await?;
+    let export = IlmRecoveryExport::decode(export_id, &encoded)?;
+    let content_sha256 = hex_sha256(&encoded, ToOwned::to_owned);
+    Ok((
+        IlmRecoveryExportCreated {
+            export_id: export.export_id.clone(),
+            content_sha256,
+            encoded,
+            replayed: false,
+        },
+        export,
+    ))
+}
+
+impl IlmRecoveryExportCreated {
+    fn with_replayed(mut self) -> Self {
+        self.replayed = true;
+        self
+    }
+}
+
+async fn load_exportable_control(api: Arc<ECStore>, control_id: &str) -> Result<ObservedIlmRecoveryControl> {
+    load_exportable_control_with_options(api, control_id, &ObjectOptions::default()).await
+}
+
+async fn load_exportable_control_no_lock(api: Arc<ECStore>, control_id: &str) -> Result<ObservedIlmRecoveryControl> {
+    load_exportable_control_with_options(
+        api,
+        control_id,
+        &ObjectOptions {
+            no_lock: true,
+            ..Default::default()
+        },
+    )
+    .await
+}
+
+async fn load_exportable_control_with_options(
+    api: Arc<ECStore>,
+    control_id: &str,
+    options: &ObjectOptions,
+) -> Result<ObservedIlmRecoveryControl> {
+    let object = recovery_control_record_object_name(IlmRecoveryProtocol::TierDeleteJournal, control_id).map_err(Error::other)?;
+    let (data, metadata) =
+        config_boundary::read_config_limited_preserve_empty_with_metadata(api, &object, options, MAX_ILM_RECOVERY_CONTROL_SIZE)
+            .await?;
+    let etag = metadata
+        .etag
+        .filter(|etag| !etag.trim().is_empty())
+        .ok_or_else(|| Error::other("ILM recovery control is missing an ETag"))?;
+    let control = IlmRecoveryControl::decode(control_id, &data).map_err(Error::other)?;
+    if control.identity.protocol != IlmRecoveryProtocol::TierDeleteJournal
+        || control.classification != IlmRecoveryClassification::RetainedAmbiguous
+        || !is_legacy_export_schema(&control.observed_source_generation.source_schema)
+    {
+        return Err(Error::other("ILM recovery control is not exportable"));
+    }
+    Ok(ObservedIlmRecoveryControl { control, etag })
+}
+
+async fn current_observation_under_proof_no_lock(
+    api: Arc<ECStore>,
+    expected: &IlmRecoveryExportObservation,
+    proof: &crate::services::notification_sys::IlmRecoveryExportFleetProofToken,
+) -> Result<(IlmRecoveryExportObservation, Vec<u8>)> {
+    let observed_control = load_exportable_control_no_lock(api.clone(), &expected.control_id).await?;
+    let observed_source = observe_export_source_no_lock(
+        api,
+        &observed_control.control.identity.canonical_source_path,
+        &observed_control.control.observed_source_generation.source_schema,
+    )
+    .await?;
+    let source_bytes = observed_source
+        .canonical_data
+        .clone()
+        .ok_or_else(|| Error::other("ILM recovery export source copies diverge"))?;
+    if !observed_source.is_consistent()
+        || observed_source.generation != observed_control.control.observed_source_generation
+        || !ilm_recovery_export_fleet_proof_matches(proof).await
+    {
+        return Err(Error::PreconditionFailed);
+    }
+    Ok((
+        IlmRecoveryExportObservation {
+            control_id: expected.control_id.clone(),
+            protocol: observed_control.control.identity.protocol,
+            control_etag: observed_control.etag,
+            control_revision: observed_control.control.revision,
+            classification: observed_control.control.classification,
+            canonical_source_path: observed_control.control.identity.canonical_source_path,
+            source_generation: observed_source.generation,
+            topology_generation: ilm_recovery_export_topology_generation(proof),
+            member_epochs_sha256: ilm_recovery_export_member_epochs_sha256(proof),
+        },
+        source_bytes,
+    ))
+}
+
+async fn observe_export_source(
+    api: Arc<ECStore>,
+    canonical_path: &str,
+    source_schema: &str,
+) -> Result<ObservedIlmRecoverySource> {
+    if canonical_path.is_empty()
+        || canonical_path.starts_with('/')
+        || canonical_path.ends_with('/')
+        || canonical_path.split('/').any(str::is_empty)
+        || !is_legacy_export_schema(source_schema)
+    {
+        return Err(Error::other("ILM recovery export source identity is invalid"));
+    }
+    let lock = api.new_ns_lock(RUSTFS_META_BUCKET, canonical_path).await?;
+    let _guard = lock.get_read_lock(crate::set_disk::get_lock_acquire_timeout()).await?;
+    observe_export_source_no_lock(api, canonical_path, source_schema).await
+}
+
+async fn observe_export_source_no_lock(
+    api: Arc<ECStore>,
+    canonical_path: &str,
+    source_schema: &str,
+) -> Result<ObservedIlmRecoverySource> {
+    let mut copies = Vec::new();
+    let mut canonical: Option<(String, String, Vec<u8>)> = None;
+    let mut consistent = true;
+    for set in api.all_set_disks() {
+        let authority = format!("pool-{}/set-{}", set.pool_index, set.set_index);
+        let result = config_boundary::read_config_limited_preserve_empty_with_metadata(
+            set,
+            canonical_path,
+            &ObjectOptions {
+                no_lock: true,
+                ..Default::default()
+            },
+            MAX_LEGACY_TIER_DELETE_SOURCE_SIZE,
+        )
+        .await;
+        match result {
+            Ok((data, metadata)) => {
+                if data.is_empty() || data.len() > MAX_LEGACY_TIER_DELETE_SOURCE_SIZE {
+                    return Err(Error::other("ILM recovery export source exceeds its protocol size limit"));
+                }
+                validate_legacy_tier_delete_recovery_source(canonical_path, source_schema, &data)?;
+                let etag = metadata
+                    .etag
+                    .filter(|etag| !etag.trim().is_empty())
+                    .ok_or_else(|| Error::other("ILM recovery export source copy is missing an ETag"))?;
+                let content_sha256 = hex_sha256(&data, ToOwned::to_owned);
+                let encoded_len =
+                    u64::try_from(data.len()).map_err(|_| Error::other("ILM recovery export source length does not fit u64"))?;
+                copies.push(IlmRecoverySourceCopy {
+                    authority,
+                    canonical_path: canonical_path.to_string(),
+                    etag: etag.clone(),
+                    encoded_len,
+                    content_sha256: content_sha256.clone(),
+                });
+                match canonical.as_ref() {
+                    Some((first_etag, first_digest, first_data)) => {
+                        consistent &= first_etag == &etag && first_digest == &content_sha256 && first_data == &data;
+                    }
+                    None => canonical = Some((etag, content_sha256, data)),
+                }
+            }
+            Err(err) if export_source_is_missing(&err) => {}
+            Err(err) => return Err(err),
+        }
+    }
+    let Some((source_etag, content_sha256, source_bytes)) = canonical else {
+        return Err(Error::ConfigNotFound);
+    };
+    let generation =
+        IlmRecoverySourceGeneration::new(source_schema, source_etag, content_sha256, copies).map_err(Error::other)?;
+    Ok(ObservedIlmRecoverySource {
+        generation,
+        canonical_data: consistent.then_some(source_bytes),
+    })
+}
+
+fn export_source_is_missing(err: &Error) -> bool {
+    matches!(
+        err,
+        Error::ConfigNotFound | Error::FileNotFound | Error::ObjectNotFound(_, _) | Error::VersionNotFound(_, _, _)
+    )
+}
+
+fn build_export_from_source(
+    observation: &IlmRecoveryExportObservation,
+    creator_sha256: &str,
+    created_at_unix_nanos: i64,
+    source_bytes_base64: &str,
+) -> Result<IlmRecoveryExport> {
+    let retain_until_unix_nanos = created_at_unix_nanos
+        .checked_add(EXPORT_RETENTION_NANOS)
+        .ok_or_else(|| Error::other("ILM recovery export retention timestamp overflow"))?;
+    let export = IlmRecoveryExport {
+        export_id: recovery_export_id(&observation.control_id, &observation.source_generation)?,
+        control_id: observation.control_id.clone(),
+        protocol: observation.protocol,
+        control_etag: observation.control_etag.clone(),
+        control_revision: observation.control_revision,
+        classification: observation.classification,
+        canonical_source_path: observation.canonical_source_path.clone(),
+        source_generation: observation.source_generation.clone(),
+        topology_generation: observation.topology_generation.clone(),
+        member_epochs_sha256: observation.member_epochs_sha256.clone(),
+        creator_sha256: creator_sha256.to_string(),
+        created_at_unix_nanos,
+        retain_until_unix_nanos,
+        source_bytes_base64: source_bytes_base64.to_string(),
+    };
+    export.validate()?;
+    Ok(export)
+}
+
+pub(crate) fn recovery_export_id(control_id: &str, generation: &IlmRecoverySourceGeneration) -> Result<String> {
+    validate_sha256(control_id, "ILM recovery export control ID is invalid")?;
+    validate_sha256(&generation.content_sha256, "ILM recovery export source checksum is invalid")?;
+    validate_sha256(&generation.copy_set_sha256, "ILM recovery export copy-set checksum is invalid")?;
+    let mut data = Vec::new();
+    for part in [control_id, &generation.content_sha256, &generation.copy_set_sha256] {
+        data.extend_from_slice(&(part.len() as u64).to_be_bytes());
+        data.extend_from_slice(part.as_bytes());
+    }
+    Ok(hex_sha256(&data, ToOwned::to_owned))
+}
+
+fn export_matches_observation(export: &IlmRecoveryExport, observation: &IlmRecoveryExportObservation) -> bool {
+    export.control_id == observation.control_id
+        && export.protocol == observation.protocol
+        && export.classification == observation.classification
+        && export.canonical_source_path == observation.canonical_source_path
+        && export.source_generation == observation.source_generation
+}
+
+#[derive(Debug, Default)]
+struct IlmRecoveryExportInventory {
+    count: usize,
+    bytes: u64,
+    creations: Vec<(i64, String)>,
+}
+
+impl IlmRecoveryExportInventory {
+    fn check(&self, creator_sha256: &str, candidate_len: usize, now: i64) -> Result<()> {
+        let recent_after = now.saturating_sub(60 * 1_000_000_000);
+        let cluster_recent = self
+            .creations
+            .iter()
+            .filter(|(created_at, _)| *created_at > recent_after)
+            .count();
+        let actor_recent = self
+            .creations
+            .iter()
+            .filter(|(created_at, creator)| *created_at > recent_after && creator == creator_sha256)
+            .count();
+        check_export_admission(self.count, self.bytes, actor_recent, cluster_recent, candidate_len)
+    }
+}
+
+async fn collect_export_inventory(api: Arc<ECStore>) -> Result<IlmRecoveryExportInventory> {
+    let mut marker = None;
+    let mut seen_markers = HashSet::new();
+    let mut inventory = IlmRecoveryExportInventory::default();
+    loop {
+        let page = api
+            .clone()
+            .list_objects_v2(
+                RUSTFS_META_BUCKET,
+                &format!("{ILM_RECOVERY_EXPORT_PREFIX}/"),
+                marker.clone(),
+                None,
+                1_000,
+                false,
+                None,
+                false,
+            )
+            .await?;
+        for object in page.objects {
+            let (_, export_id) = recovery_export_id_from_record_object_name(&object.name)?;
+            let (stored, export) = load_recovery_export_decoded(api.clone(), &export_id).await?;
+            inventory.count = inventory
+                .count
+                .checked_add(1)
+                .ok_or_else(|| Error::other("ILM recovery export count overflow"))?;
+            inventory.bytes = inventory
+                .bytes
+                .checked_add(u64::try_from(stored.encoded.len()).map_err(|_| Error::other("ILM recovery export size overflow"))?)
+                .ok_or_else(|| Error::other("ILM recovery export byte total overflow"))?;
+            inventory
+                .creations
+                .push((export.created_at_unix_nanos, export.creator_sha256));
+        }
+        if !page.is_truncated {
+            break;
+        }
+        let next = page
+            .next_continuation_token
+            .ok_or_else(|| Error::other("ILM recovery export inventory omitted its continuation marker"))?;
+        marker = Some(record_export_inventory_marker(&mut seen_markers, next)?);
+    }
+    Ok(inventory)
+}
+
+fn record_export_inventory_marker(seen_markers: &mut HashSet<String>, next: String) -> Result<String> {
+    if !seen_markers.insert(next.clone()) {
+        return Err(Error::other("ILM recovery export inventory repeated its continuation marker"));
+    }
+    Ok(next)
+}
+
+fn check_export_admission(
+    count: usize,
+    bytes: u64,
+    actor_recent: usize,
+    cluster_recent: usize,
+    candidate_len: usize,
+) -> Result<()> {
+    let candidate_len = u64::try_from(candidate_len).map_err(|_| Error::other("ILM recovery export size does not fit u64"))?;
+    if count >= MAX_ILM_RECOVERY_EXPORTS
+        || bytes
+            .checked_add(candidate_len)
+            .is_none_or(|total| total > MAX_ILM_RECOVERY_EXPORT_BYTES)
+        || actor_recent >= MAX_ACTOR_EXPORTS_PER_MINUTE
+        || cluster_recent >= MAX_CLUSTER_EXPORTS_PER_MINUTE
+    {
+        return Err(Error::SlowDown);
+    }
+    Ok(())
+}
+
+fn is_legacy_export_schema(schema: &str) -> bool {
+    matches!(schema, TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA | TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA)
+}
+
+fn validate_sha256(value: &str, message: &'static str) -> Result<()> {
+    if !is_sha256_checksum(value)
+        || value
+            .bytes()
+            .any(|byte| byte.is_ascii_hexdigit() && byte.is_ascii_uppercase())
+    {
+        return Err(Error::other(message));
+    }
+    Ok(())
+}
+
+fn now_unix_nanos() -> Result<i64> {
+    i64::try_from(time::OffsetDateTime::now_utc().unix_timestamp_nanos())
+        .map_err(|_| Error::other("ILM recovery export timestamp does not fit i64"))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::bucket::lifecycle::recovery_control::IlmRecoverySourceCopy;
+
+    const PINNED_V1_EXPORT: &[u8] = br#"{"schema":"rustfs-ilm-recovery-export-v1","content_sha256":"3dfb3ec3892256e909de1211c1a963ca7008963ff32b3a869f7161a7b9b44028","export":{"export_id":"2b78e7a825bfc2edbf7f773d0b6ed3bf93e360ff1702d73a449109c11bfaa105","control_id":"0fcd568a5cb9bdb4677b69354b11ee415af8f784519cff3da49a26f84eaee7f2","protocol":"tier_delete_journal","control_etag":"control-etag","control_revision":1,"classification":"retained_ambiguous","canonical_source_path":"ilm/tier-delete-journal/872072554f66ab326f10ce7adbae11422b7a4b0663aa7112d6061a8f6ed41b94.json","source_generation":{"source_schema":"rustfs-tier-delete-journal-v1","source_etag":"etag-a","content_sha256":"0e0b010ebdeeb7b41473fe8575e989d6bb1303c0ca551dd984e9400f0ae306bd","copy_set_sha256":"5a7406115b6c3923ffe79dcd1f43ccae7beed786e557163f019dd10ec409a653","copies":[{"authority":"pool-0/set-0","canonical_path":"ilm/tier-delete-journal/872072554f66ab326f10ce7adbae11422b7a4b0663aa7112d6061a8f6ed41b94.json","etag":"etag-a","encoded_len":81,"content_sha256":"0e0b010ebdeeb7b41473fe8575e989d6bb1303c0ca551dd984e9400f0ae306bd"}]},"topology_generation":"e6e2b826e31fca5c36125c48f130dcb6f961e698ff8a8776a1f290cf0892e8e6","member_epochs_sha256":"612dd8a861161819a4ad8f6f3e2a0567602877c043a2353ca933a13c78dc0ed4","creator_sha256":"50c9c4aeb40b5b206b6d98f516f8b8c0efd29ce2e56a76b345fb9240c225a1b7","created_at_unix_nanos":1000000000,"retain_until_unix_nanos":7776001000000000,"source_bytes_base64":"eyJ2ZXJzaW9uIjoxLCJvYmpfbmFtZSI6ImxlZ2FjeS9yZW1vdGUiLCJ2ZXJzaW9uX2lkIjoib3BhcXVlIiwidGllcl9uYW1lIjoiV0FSTSJ9"}}"#;
+
+    fn legacy_source() -> Vec<u8> {
+        br#"{"version":1,"obj_name":"legacy/remote","version_id":"opaque","tier_name":"WARM"}"#.to_vec()
+    }
+
+    fn observation() -> IlmRecoveryExportObservation {
+        let source = legacy_source();
+        let source_path = super::super::tier_delete_journal::tier_delete_journal_object_name(
+            &super::super::tier_delete_journal::decode_tier_delete_journal_entry(&source).expect("legacy fixture should decode"),
+        );
+        let source_sha256 = hex_sha256(&source, ToOwned::to_owned);
+        let generation = IlmRecoverySourceGeneration::new(
+            TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA,
+            "etag-a",
+            source_sha256.clone(),
+            vec![IlmRecoverySourceCopy {
+                authority: "pool-0/set-0".to_string(),
+                canonical_path: source_path.clone(),
+                etag: "etag-a".to_string(),
+                encoded_len: source.len() as u64,
+                content_sha256: source_sha256,
+            }],
+        )
+        .expect("generation should be valid");
+        IlmRecoveryExportObservation {
+            control_id: hex_sha256(b"control", ToOwned::to_owned),
+            protocol: IlmRecoveryProtocol::TierDeleteJournal,
+            control_etag: "control-etag".to_string(),
+            control_revision: 1,
+            classification: IlmRecoveryClassification::RetainedAmbiguous,
+            canonical_source_path: source_path,
+            source_generation: generation,
+            topology_generation: hex_sha256(b"topology", ToOwned::to_owned),
+            member_epochs_sha256: hex_sha256(b"epochs", ToOwned::to_owned),
+        }
+    }
+
+    #[test]
+    fn recovery_export_round_trip_is_strict_and_deterministic() {
+        let observed = observation();
+        let creator = hex_sha256(b"actor", ToOwned::to_owned);
+        let export = build_export_from_source(
+            &observed,
+            &creator,
+            1_000_000_000,
+            &base64_simd::STANDARD.encode_to_string(legacy_source()),
+        )
+        .expect("export should be valid");
+        assert_eq!(
+            export.export_id,
+            recovery_export_id(&observed.control_id, &observed.source_generation).unwrap()
+        );
+        let encoded = export.encode().expect("export should encode");
+        assert_eq!(encoded, PINNED_V1_EXPORT, "v1 export wire format must remain pinned");
+        assert_eq!(IlmRecoveryExport::decode(&export.export_id, &encoded).unwrap(), export);
+        assert_eq!(
+            IlmRecoveryExport::decode("2b78e7a825bfc2edbf7f773d0b6ed3bf93e360ff1702d73a449109c11bfaa105", PINNED_V1_EXPORT)
+                .unwrap(),
+            export,
+        );
+
+        let path = recovery_export_record_object_name(export.protocol, &export.export_id).unwrap();
+        let durable = super::super::durable_namespace::validate_durable_ilm_record(&path, &encoded)
+            .expect("export should be registered as a durable ILM record");
+        assert_eq!(durable.namespace, "recovery-export");
+        assert_eq!(durable.id_kind, "export_id");
+        assert_eq!(durable.id, export.export_id);
+
+        let mut wrong_source = export.clone();
+        wrong_source.source_bytes_base64 = base64_simd::STANDARD.encode_to_string(b"changed");
+        assert!(wrong_source.encode().is_err());
+
+        let mut persisted: serde_json::Value = serde_json::from_slice(&encoded).unwrap();
+        persisted["unknown"] = serde_json::json!(true);
+        assert!(IlmRecoveryExport::decode(&export.export_id, &serde_json::to_vec(&persisted).unwrap()).is_err());
+    }
+
+    #[test]
+    fn export_inventory_rejects_non_adjacent_continuation_cycles() {
+        let mut seen = HashSet::new();
+        assert_eq!(record_export_inventory_marker(&mut seen, "a".to_string()).unwrap(), "a");
+        assert_eq!(record_export_inventory_marker(&mut seen, "b".to_string()).unwrap(), "b");
+        record_export_inventory_marker(&mut seen, "a".to_string())
+            .expect_err("a non-adjacent continuation marker cycle must fail closed");
+    }
+
+    #[test]
+    fn recovery_export_path_rejects_noncanonical_shards() {
+        let id = hex_sha256(b"export", ToOwned::to_owned);
+        let path = recovery_export_record_object_name(IlmRecoveryProtocol::TierDeleteJournal, &id).unwrap();
+        assert_eq!(recovery_export_id_from_record_object_name(&path).unwrap().1, id);
+        let wrong_shard = path.replacen(&format!("/{}/", &id[..2]), "/zz/", 1);
+        assert!(recovery_export_id_from_record_object_name(&wrong_shard).is_err());
+    }
+
+    #[test]
+    fn canonical_replay_survives_fleet_rotation_but_not_source_change() {
+        let observed = observation();
+        let creator = hex_sha256(b"actor", ToOwned::to_owned);
+        let export = build_export_from_source(
+            &observed,
+            &creator,
+            1_000_000_000,
+            &base64_simd::STANDARD.encode_to_string(legacy_source()),
+        )
+        .unwrap();
+        let mut rotated = observed;
+        rotated.control_etag = "new-control-etag".to_string();
+        rotated.control_revision += 1;
+        rotated.topology_generation = hex_sha256(b"new-topology", ToOwned::to_owned);
+        rotated.member_epochs_sha256 = hex_sha256(b"new-members", ToOwned::to_owned);
+        assert!(export_matches_observation(&export, &rotated));
+
+        rotated.source_generation.content_sha256 = hex_sha256(b"changed", ToOwned::to_owned);
+        assert!(!export_matches_observation(&export, &rotated));
+    }
+
+    #[test]
+    fn export_admission_enforces_exact_count_byte_and_rate_boundaries() {
+        assert!(check_export_admission(9_999, MAX_ILM_RECOVERY_EXPORT_BYTES - 1, 9, 99, 1).is_ok());
+        assert!(check_export_admission(10_000, 0, 0, 0, 1).is_err());
+        assert!(check_export_admission(0, MAX_ILM_RECOVERY_EXPORT_BYTES, 0, 0, 1).is_err());
+        assert!(check_export_admission(0, 0, 10, 0, 1).is_err());
+        assert!(check_export_admission(0, 0, 0, 100, 1).is_err());
+    }
+}
@@ -35,6 +35,10 @@ use crate::bucket::lifecycle::config_boundary;
 use crate::bucket::lifecycle::durable_namespace::{
    TIER_DELETE_JOURNAL_NAMESPACE, TIER_DELETE_JOURNAL_V6_NAMESPACE, validate_durable_ilm_record,
 };
+use crate::bucket::lifecycle::recovery_control::{
+    IlmRecoveryClassification, IlmRecoveryControl, IlmRecoveryControlIdentity, IlmRecoveryErrorCode, IlmRecoveryProtocol,
+    load_recovery_control, observe_recovery_source, save_recovery_control_if_absent,
+};
 use crate::bucket::lifecycle::runtime_boundary;
 use crate::bucket::lifecycle::tier_sweeper::{
    Jentry, TierDeleteDispatchBinding, TierDeleteJournalState, TierDeleteSourceIdentity,
@@ -78,6 +82,13 @@ const TIER_DELETE_DISPATCH_MEMBER_DELETE_CONCURRENCY: usize = 32;
 const TIER_DELETE_DISPATCH_PREPARE_CONCURRENCY: usize = 16;
 const TIER_DELETE_DISPATCH_CAS_CONCURRENCY: usize = 32;
 const TIER_DELETE_JOURNAL_VERSION: u8 = 2;
+pub(crate) const TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA: &str = "rustfs-tier-delete-journal-v1";
+pub(crate) const TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA: &str = "rustfs-tier-delete-journal-v2";
+const TIER_DELETE_JOURNAL_UNKNOWN_RECOVERY_SCHEMA: &str = "rustfs-tier-delete-journal-unknown";
+const TIER_DELETE_JOURNAL_V1_RECOVERY_CLASS: &str = "tier_delete_journal_v1";
+const TIER_DELETE_JOURNAL_V2_RECOVERY_CLASS: &str = "tier_delete_journal_v2";
+const TIER_DELETE_JOURNAL_CORRUPT_RECOVERY_CLASS: &str = "tier_delete_journal_corrupt";
+const CORRUPT_TIER_DELETE_JOURNAL_IDENTITY: &str = "corrupt";
 const TIER_DELETE_JOURNAL_EXACT_VERSION: u8 = 3;
 const TIER_DELETE_JOURNAL_STATE_VERSION: u8 = 4;
 const TIER_DELETE_JOURNAL_TRANSACTION_VERSION: u8 = 5;
@@ -873,6 +884,23 @@ struct PersistedTierDeleteJournalEntry {
 }

 impl PersistedTierDeleteJournalEntry {
+    fn validate_legacy_recovery_shape(&self) -> Result<()> {
+        let has_later_version_fields = self.version_id_exact.is_some()
+            || self.version_state.is_some()
+            || self.state.is_some()
+            || self.source.is_some()
+            || self.dispatch.is_some();
+        match self.version {
+            1 if self.backend_identity.is_none() && !has_later_version_fields => Ok(()),
+            TIER_DELETE_JOURNAL_VERSION if self.backend_identity.is_some() && !has_later_version_fields => Ok(()),
+            1 => Err(Error::other("tier delete journal v1 entry contains fields from a later version")),
+            TIER_DELETE_JOURNAL_VERSION => Err(Error::other(
+                "tier delete journal v2 entry is missing its identity or contains fields from a later version",
+            )),
+            _ => Err(Error::other("tier delete journal is not an exportable legacy version")),
+        }
+    }
+
    fn from_jentry(je: &Jentry) -> Result<Self> {
        validate_version_state(je.version_state, &je.version_id, je.version_id_exact)?;
        let legacy_unknown = je.version_state == rustfs_filemeta::TransitionVersionState::Unknown;
@@ -5509,6 +5537,146 @@ enum TierDeleteJournalEntryRecoveryOutcome {
    Failed,
 }

+fn canonical_legacy_tier_delete_journal_identity(object_name: &str) -> Option<&str> {
+    let identity = object_name
+        .strip_prefix(TIER_DELETE_JOURNAL_LEGACY_PREFIX)?
+        .strip_suffix(".json")?;
+    (rustfs_utils::crypto::is_sha256_checksum(identity)
+        && !identity
+            .bytes()
+            .any(|byte| byte.is_ascii_hexdigit() && byte.is_ascii_uppercase()))
+    .then_some(identity)
+}
+
+pub(crate) fn validate_legacy_tier_delete_recovery_path(object_name: &str) -> Result<()> {
+    canonical_legacy_tier_delete_journal_identity(object_name)
+        .map(|_| ())
+        .ok_or_else(|| Error::other("legacy tier delete journal path is not canonical"))
+}
+
+fn legacy_tier_delete_recovery_descriptor(entry: &Jentry) -> Option<(&'static str, &'static str)> {
+    match entry.persisted_version {
+        1 => Some((TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_V1_RECOVERY_CLASS)),
+        TIER_DELETE_JOURNAL_VERSION => Some((TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_V2_RECOVERY_CLASS)),
+        _ => None,
+    }
+}
+
+pub(crate) fn validate_legacy_tier_delete_recovery_source(object_name: &str, source_schema: &str, data: &[u8]) -> Result<()> {
+    validate_legacy_tier_delete_recovery_path(object_name)?;
+    let persisted: PersistedTierDeleteJournalEntry =
+        serde_json::from_slice(data).map_err(|err| Error::other_with_context("decode tier delete journal failed", err))?;
+    persisted.validate_legacy_recovery_shape()?;
+    let entry = persisted.into_jentry()?;
+    let Some((decoded_schema, _)) = legacy_tier_delete_recovery_descriptor(&entry) else {
+        return Err(Error::other("tier delete journal is not an exportable legacy version"));
+    };
+    if decoded_schema != source_schema || tier_delete_journal_object_name(&entry) != object_name {
+        return Err(Error::other("legacy tier delete journal identity does not match its recovery source"));
+    }
+    Ok(())
+}
+
+fn legacy_tier_delete_control_matches(
+    control: &IlmRecoveryControl,
+    identity: &IlmRecoveryControlIdentity,
+    generation: &crate::bucket::lifecycle::recovery_control::IlmRecoverySourceGeneration,
+    classification: IlmRecoveryClassification,
+    error_code: IlmRecoveryErrorCode,
+) -> bool {
+    control.identity == *identity
+        && control.observed_source_generation == *generation
+        && control.classification == classification
+        && control.last_error_code == error_code
+        && control.owner.is_none()
+        && control.attempt_count == 0
+        && control.consecutive_failure_count == 0
+}
+
+fn legacy_tier_delete_control_is_scheduler_fence(control: &IlmRecoveryControl, identity: &IlmRecoveryControlIdentity) -> bool {
+    control.identity == *identity && control.owner.is_none() && !control.classification.permits_automatic_attempt()
+}
+
+async fn persist_legacy_tier_delete_recovery_control(
+    api: Arc<ECStore>,
+    object_name: &str,
+    observed_data: &[u8],
+    stable_operation_identity: String,
+    (source_schema, record_class): (&'static str, &'static str),
+    intended_classification: IlmRecoveryClassification,
+    intended_error_code: IlmRecoveryErrorCode,
+) -> Result<()> {
+    let identity = IlmRecoveryControlIdentity {
+        protocol: IlmRecoveryProtocol::TierDeleteJournal,
+        canonical_source_path: object_name.to_string(),
+        stable_operation_identity,
+        record_class: record_class.to_string(),
+    };
+    let control_id = identity.source_operation_digest().map_err(Error::other)?;
+    match load_recovery_control(api.clone(), IlmRecoveryProtocol::TierDeleteJournal, &control_id).await {
+        Ok(observed) if legacy_tier_delete_control_is_scheduler_fence(&observed.control, &identity) => return Ok(()),
+        Ok(_) => return Err(Error::PreconditionFailed),
+        Err(Error::ConfigNotFound) => {}
+        Err(err) => return Err(err),
+    }
+
+    let source = observe_recovery_source(api.clone(), object_name, source_schema).await?;
+    let exact_source = source.is_consistent() && source.canonical_data.as_deref() == Some(observed_data);
+    let (classification, error_code) = if exact_source {
+        (intended_classification, intended_error_code)
+    } else {
+        (IlmRecoveryClassification::Corrupt, IlmRecoveryErrorCode::SourceDivergent)
+    };
+    let candidate = IlmRecoveryControl::new(
+        identity.clone(),
+        source.generation.clone(),
+        classification,
+        i64::try_from(time::OffsetDateTime::now_utc().unix_timestamp_nanos())
+            .map_err(|_| Error::other("tier delete journal recovery timestamp does not fit i64"))?,
+        error_code,
+    )
+    .map_err(Error::other)?;
+
+    match save_recovery_control_if_absent(api.clone(), &candidate).await {
+        Ok(()) | Err(Error::PreconditionFailed) => {}
+        Err(save_error) => match load_recovery_control(api.clone(), IlmRecoveryProtocol::TierDeleteJournal, &control_id).await {
+            Ok(observed)
+                if legacy_tier_delete_control_matches(
+                    &observed.control,
+                    &identity,
+                    &source.generation,
+                    classification,
+                    error_code,
+                ) =>
+            {
+                return Ok(());
+            }
+            Ok(_) | Err(_) => return Err(save_error),
+        },
+    }
+
+    let observed = load_recovery_control(api, IlmRecoveryProtocol::TierDeleteJournal, &control_id).await?;
+    if !legacy_tier_delete_control_matches(&observed.control, &identity, &source.generation, classification, error_code) {
+        return Err(Error::PreconditionFailed);
+    }
+    Ok(())
+}
+
+async fn retain_corrupt_legacy_tier_delete_journal(api: Arc<ECStore>, object_name: &str, data: &[u8]) -> Result<()> {
+    canonical_legacy_tier_delete_journal_identity(object_name)
+        .ok_or_else(|| Error::other("tier delete journal path is not canonical"))?;
+    persist_legacy_tier_delete_recovery_control(
+        api,
+        object_name,
+        data,
+        CORRUPT_TIER_DELETE_JOURNAL_IDENTITY.to_string(),
+        (TIER_DELETE_JOURNAL_UNKNOWN_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_CORRUPT_RECOVERY_CLASS),
+        IlmRecoveryClassification::Corrupt,
+        IlmRecoveryErrorCode::SourceCorrupt,
+    )
+    .await
+}
+
 async fn recover_tier_delete_journal_entry(api: Arc<ECStore>, object_name: String) -> TierDeleteJournalEntryRecoveryOutcome {
    let data = match config_boundary::read_config(api.clone(), &object_name).await {
        Ok(data) => data,
@@ -5529,6 +5697,22 @@ async fn recover_tier_delete_journal_entry(api: Arc<ECStore>, object_name: Strin
    let je = match decode_tier_delete_journal_entry(&data) {
        Ok(je) => je,
        Err(err) => {
+            if canonical_legacy_tier_delete_journal_identity(&object_name).is_some() {
+                return match retain_corrupt_legacy_tier_delete_journal(api, &object_name, &data).await {
+                    Ok(()) => TierDeleteJournalEntryRecoveryOutcome::Retained,
+                    Err(control_error) => {
+                        warn!(
+                            event = EVENT_LIFECYCLE_TIER_DELETE_JOURNAL,
+                            component = LOG_COMPONENT_ECSTORE,
+                            subsystem = LOG_SUBSYSTEM_LIFECYCLE,
+                            journal_object = %object_name,
+                            error = ?control_error,
+                            "Failed to retain corrupt tier delete journal recovery control"
+                        );
+                        TierDeleteJournalEntryRecoveryOutcome::Failed
+                    }
+                };
+            }
            warn!(
                event = EVENT_LIFECYCLE_TIER_DELETE_JOURNAL,
                component = LOG_COMPONENT_ECSTORE,
@@ -5542,6 +5726,22 @@ async fn recover_tier_delete_journal_entry(api: Arc<ECStore>, object_name: Strin
    };

    if tier_delete_journal_object_name(&je) != object_name {
+        if canonical_legacy_tier_delete_journal_identity(&object_name).is_some() {
+            return match retain_corrupt_legacy_tier_delete_journal(api, &object_name, &data).await {
+                Ok(()) => TierDeleteJournalEntryRecoveryOutcome::Retained,
+                Err(err) => {
+                    warn!(
+                        event = EVENT_LIFECYCLE_TIER_DELETE_JOURNAL,
+                        component = LOG_COMPONENT_ECSTORE,
+                        subsystem = LOG_SUBSYSTEM_LIFECYCLE,
+                        journal_object = %object_name,
+                        error = ?err,
+                        "Failed to retain mismatched tier delete journal recovery control"
+                    );
+                    TierDeleteJournalEntryRecoveryOutcome::Failed
+                }
+            };
+        }
        warn!(
            event = EVENT_LIFECYCLE_TIER_DELETE_JOURNAL,
            component = LOG_COMPONENT_ECSTORE,
@@ -5552,6 +5752,36 @@ async fn recover_tier_delete_journal_entry(api: Arc<ECStore>, object_name: Strin
        return TierDeleteJournalEntryRecoveryOutcome::Failed;
    }

+    if let Some((source_schema, record_class)) = legacy_tier_delete_recovery_descriptor(&je) {
+        let stable_operation_identity = canonical_legacy_tier_delete_journal_identity(&object_name)
+            .expect("decoded legacy journal path was validated against its canonical object name")
+            .to_string();
+        return match persist_legacy_tier_delete_recovery_control(
+            api,
+            &object_name,
+            &data,
+            stable_operation_identity,
+            (source_schema, record_class),
+            IlmRecoveryClassification::RetainedAmbiguous,
+            IlmRecoveryErrorCode::RemoteVersionUnknown,
+        )
+        .await
+        {
+            Ok(()) => TierDeleteJournalEntryRecoveryOutcome::Retained,
+            Err(err) => {
+                warn!(
+                    event = EVENT_LIFECYCLE_TIER_DELETE_JOURNAL,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_LIFECYCLE,
+                    journal_object = %object_name,
+                    error = ?err,
+                    "Failed to retain legacy tier delete journal recovery control"
+                );
+                TierDeleteJournalEntryRecoveryOutcome::Failed
+            }
+        };
+    }
+
    match api
        .durable_ilm_terminal_receipt_covers_active_source(&object_name, &data)
        .await
@@ -5948,17 +6178,18 @@ where
 #[cfg(test)]
 mod tests {
    use super::{
-        TIER_DELETE_DISPATCH_MANIFEST_VERSION, TIER_DELETE_DISPATCH_PARENT_RECORD_TYPE, TIER_DELETE_DISPATCH_PARENT_VERSION,
-        TIER_DELETE_JOURNAL_EXACT_VERSION, TIER_DELETE_JOURNAL_LEGACY_PREFIX, TIER_DELETE_JOURNAL_SOLE_OWNER_VERSION,
-        TIER_DELETE_JOURNAL_STATE_VERSION, TIER_DELETE_JOURNAL_TRANSACTION_VERSION, TIER_DELETE_JOURNAL_V6_PREFIX,
-        TierDeleteDispatchChunkBinding, TierDeleteDispatchManifest, TierDeleteDispatchManifestState, TierDeleteDispatchParent,
-        TierDeleteDispatchParentState, TierDeleteDispatchRecord, await_tier_delete_journal_recovery,
+        PersistedTierDeleteJournalEntry, TIER_DELETE_DISPATCH_MANIFEST_VERSION, TIER_DELETE_DISPATCH_PARENT_RECORD_TYPE,
+        TIER_DELETE_DISPATCH_PARENT_VERSION, TIER_DELETE_JOURNAL_EXACT_VERSION, TIER_DELETE_JOURNAL_LEGACY_PREFIX,
+        TIER_DELETE_JOURNAL_SOLE_OWNER_VERSION, TIER_DELETE_JOURNAL_STATE_VERSION, TIER_DELETE_JOURNAL_TRANSACTION_VERSION,
+        TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA, TIER_DELETE_JOURNAL_V6_PREFIX,
+        TIER_DELETE_JOURNAL_VERSION, TierDeleteDispatchChunkBinding, TierDeleteDispatchManifest, TierDeleteDispatchManifestState,
+        TierDeleteDispatchParent, TierDeleteDispatchParentState, TierDeleteDispatchRecord, await_tier_delete_journal_recovery,
        decode_tier_delete_dispatch_record, decode_tier_delete_journal_entry, encode_tier_delete_dispatch_manifest,
        encode_tier_delete_dispatch_parent, encode_tier_delete_journal_entry, object_info_references_tier_delete,
        record_tier_delete_journal_backend_identity, same_tier_delete_authorization_identity, same_tier_delete_journal_identity,
        tier_delete_dispatch_child_matches_parent, tier_delete_dispatch_chunk_manifest_object_name,
        tier_delete_dispatch_journal_set_digest, tier_delete_dispatch_manifest_object_name, tier_delete_journal_object_name,
-        tier_delete_source_matches_dispatch_scope,
+        tier_delete_source_matches_dispatch_scope, validate_legacy_tier_delete_recovery_source,
    };
    use crate::bucket::lifecycle::tier_sweeper::{
        Jentry, TierDeleteDispatchBinding, TierDeleteJournalState, TierDeleteSourceIdentity,
@@ -6417,6 +6648,72 @@ mod tests {
        }
    }

+    #[test]
+    fn legacy_recovery_export_rejects_fields_from_later_journal_versions() {
+        let later = bound_v6_journal_entry(TierDeleteJournalState::Prepared);
+        let v1 = PersistedTierDeleteJournalEntry {
+            version: 1,
+            obj_name: "remote/object".to_string(),
+            version_id: "opaque".to_string(),
+            tier_name: "WARM".to_string(),
+            backend_identity: None,
+            version_id_exact: None,
+            version_state: None,
+            state: None,
+            source: None,
+            dispatch: None,
+        };
+        let mut v2 = v1.clone();
+        v2.version = TIER_DELETE_JOURNAL_VERSION;
+        v2.backend_identity = Some([7; 32]);
+
+        let assert_rejected = |persisted: PersistedTierDeleteJournalEntry, schema: &str| {
+            let normalized = persisted
+                .clone()
+                .into_jentry()
+                .expect("the generic compatibility decoder should demonstrate the discarded field");
+            let object_name = tier_delete_journal_object_name(&normalized);
+            let encoded = serde_json::to_vec(&persisted).expect("mixed-version journal fixture should encode");
+            let err = validate_legacy_tier_delete_recovery_source(&object_name, schema, &encoded)
+                .expect_err("legacy recovery export must reject fields from later versions");
+            assert!(err.to_string().contains("later version"));
+        };
+
+        let mut invalid_v1 = Vec::new();
+        let mut with_backend = v1.clone();
+        with_backend.backend_identity = Some([7; 32]);
+        invalid_v1.push(with_backend);
+        for persisted in [&v1, &v2] {
+            let schema = if persisted.version == 1 {
+                TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA
+            } else {
+                TIER_DELETE_JOURNAL_V2_RECOVERY_SCHEMA
+            };
+            let mut invalid = Vec::new();
+            let mut with_exact = persisted.clone();
+            with_exact.version_id_exact = Some(false);
+            invalid.push(with_exact);
+            let mut with_version_state = persisted.clone();
+            with_version_state.version_state = Some(rustfs_filemeta::TransitionVersionState::Unknown);
+            invalid.push(with_version_state);
+            let mut with_state = persisted.clone();
+            with_state.state = Some(TierDeleteJournalState::Committed);
+            invalid.push(with_state);
+            let mut with_source = persisted.clone();
+            with_source.source = later.source.clone();
+            invalid.push(with_source);
+            let mut with_dispatch = persisted.clone();
+            with_dispatch.dispatch = later.dispatch.clone();
+            invalid.push(with_dispatch);
+            for record in invalid {
+                assert_rejected(record, schema);
+            }
+        }
+        for record in invalid_v1 {
+            assert_rejected(record, TIER_DELETE_JOURNAL_V1_RECOVERY_SCHEMA);
+        }
+    }
+
    #[test]
    fn tier_delete_journal_path_is_stable_and_sanitized() {
        let je = journal_entry();
@@ -575,7 +575,7 @@ pub(crate) async fn delete_confirmed_transition_candidate_exact_with_lease_idemp
 #[cfg(test)]
 static CONFIRMED_TRANSITION_EMPTY_GUARD_DISPATCHES: std::sync::atomic::AtomicUsize = std::sync::atomic::AtomicUsize::new(0);

-#[cfg(test)]
+#[cfg(all(test, feature = "test-util"))]
 pub(crate) async fn delete_confirmed_transition_candidate_exact_with_manager_and_identity(
    obj_name: &str,
    rv_id: &str,
@@ -706,15 +706,16 @@ pub(crate) fn transitioned_delete_journal_entry_for_source(

 #[cfg(test)]
 mod test {
+    #[cfg(feature = "test-util")]
+    use super::delete_confirmed_transition_candidate_exact_with_manager_and_identity;
    use rustfs_s3_client::signer_error::invalid_utf8_header_error;

    use super::{
        CONFIRMED_TRANSITION_EMPTY_GUARD_DISPATCHES, ERR_REMOTE_DELETE_BREAKER_OPEN, ERR_REMOTE_DELETE_LIMITER_CLOSED, Jentry,
        RemoteDeleteBreaker, RemoteTierDeleteOutcome, TierDeleteJournalState, TierDeleteSourceIdentity,
-        delete_confirmed_transition_candidate_exact_with_manager_and_identity, delete_object_from_remote_tier_idempotent,
-        delete_object_from_remote_tier_idempotent_with_manager_and_identity, is_remote_tier_not_found_error,
-        is_signer_header_error, lifecycle, set_remote_tier_delete_test_hook, should_record_remote_delete_failure,
-        transitioned_delete_journal_entry, transitioned_force_delete_journal_entry,
+        delete_object_from_remote_tier_idempotent, delete_object_from_remote_tier_idempotent_with_manager_and_identity,
+        is_remote_tier_not_found_error, is_signer_header_error, lifecycle, set_remote_tier_delete_test_hook,
+        should_record_remote_delete_failure, transitioned_delete_journal_entry, transitioned_force_delete_journal_entry,
    };
    use crate::storage_api_contracts::lifecycle::TransitionedObject;
    use rustfs_filemeta::TransitionVersionState;
@@ -489,28 +489,17 @@ impl BucketMetadata {
        !self.bucket_targets_config_json.is_empty() && self.bucket_target_config.is_none()
    }

-    /// Parsed per-bucket durability override, if a valid one is stored.
-    ///
-    /// Absent/empty/unparsable payloads all mean "no override" (the bucket
-    /// follows the global durability mode); a parse failure is logged so a
-    /// corrupted entry cannot silently change fsync behavior.
-    /// Parsed on-demand migration config, if one is stored.
-    ///
-    /// `Ok(None)` means no config (absent or cleared). A stored payload that
-    /// does not parse is an error, never a default: the runtime must not
-    /// pull from a source it cannot describe.
-    pub fn on_demand_migration_config(
-        &self,
-    ) -> std::result::Result<
-        Option<super::on_demand_migration::OnDemandMigrationConfig>,
-        super::on_demand_migration::OnDemandMigrationConfigError,
-    > {
-        if self.on_demand_migration_config_json.is_empty() {
-            return Ok(None);
-        }
-        super::on_demand_migration::OnDemandMigrationConfig::from_json(&self.on_demand_migration_config_json).map(Some)
+    /// Opaque application-owned configuration with its persisted update time.
+    /// Empty bytes mean absent or cleared; decoding belongs to the consumer.
+    pub fn on_demand_migration_config(&self) -> Option<(&[u8], OffsetDateTime)> {
+        (!self.on_demand_migration_config_json.is_empty()).then_some((
+            self.on_demand_migration_config_json.as_slice(),
+            self.on_demand_migration_config_updated_at,
+        ))
    }

+    /// Parsed per-bucket durability override, if a valid one is stored.
+    /// Invalid payloads follow the global mode after logging a parse failure.
    pub fn durability_config(&self) -> Option<super::durability::BucketDurabilityConfig> {
        if self.durability_config_json.is_empty() {
            return None;
@@ -802,9 +791,22 @@ impl BucketMetadata {
        }
    }

+    /// Replace one config payload and stamp its `*_config_updated_at` with the
+    /// local clock. This is the entry for edits that originate here: the
+    /// local write time is the edit's source time.
    pub fn update_config(&mut self, config_file: &str, data: Vec<u8>) -> Result<OffsetDateTime> {
-        let updated = OffsetDateTime::now_utc();
+        self.update_config_at(config_file, data, OffsetDateTime::now_utc())
+    }

+    /// [`Self::update_config`] with an explicit `updated_at` stamp.
+    ///
+    /// For a config replicated from another site the edit's source time is
+    /// the peer's `updated_at`, not the moment it lands here: staleness of
+    /// the next incoming item is judged against the stored stamp, so stamping
+    /// the local apply time would reject a newer source edit that was merely
+    /// delivered late (backlog#2292). Only replication receivers should pass
+    /// a foreign time; local edits keep [`Self::update_config`].
+    pub fn update_config_at(&mut self, config_file: &str, data: Vec<u8>, updated: OffsetDateTime) -> Result<OffsetDateTime> {
        match config_file {
            BUCKET_POLICY_CONFIG => {
                self.policy_config_json = data;
@@ -916,13 +918,6 @@ impl BucketMetadata {
                self.durability_config_updated_at = updated;
            }
            BUCKET_ON_DEMAND_MIGRATION_CONFIG => {
-                // Structural check only (shape, unknown fields); the
-                // deployment-relative rules run in the admin handler with a
-                // `ValidationContext`. A blob this build cannot read must not
-                // be persisted for every later reader to trip over.
-                if !data.is_empty() {
-                    super::on_demand_migration::OnDemandMigrationConfig::from_json(&data).map_err(Error::other)?;
-                }
                self.on_demand_migration_config_json = data;
                self.on_demand_migration_config_updated_at = updated;
            }
@@ -1543,6 +1538,39 @@ mod test {
        assert_eq!(metadata.bucket_incarnation_id, incarnation);
    }

+    /// backlog#2292: a replicated config is stamped with the source
+    /// `updated_at` it was given, not the local clock, while the plain
+    /// `update_config` entry keeps stamping the local clock.
+    #[test]
+    fn update_config_at_stamps_the_given_time_and_update_config_stamps_now() {
+        let source_time = OffsetDateTime::now_utc() - time::Duration::hours(3);
+        let mut metadata = BucketMetadata::new("source-stamped");
+
+        let stamped = metadata
+            .update_config_at(BUCKET_POLICY_CONFIG, br#"{"Version":"2012-10-17","Statement":[]}"#.to_vec(), source_time)
+            .unwrap();
+        assert_eq!(stamped, source_time);
+        assert_eq!(metadata.policy_config_updated_at, source_time);
+
+        let tagging = b"<Tagging><TagSet><Tag><Key>k</Key><Value>v</Value></Tag></TagSet></Tagging>".to_vec();
+        let stamped = metadata
+            .update_config_at(BUCKET_TAGGING_CONFIG, tagging, source_time)
+            .unwrap();
+        assert_eq!(stamped, source_time);
+        assert_eq!(metadata.tagging_config_updated_at, source_time);
+
+        let before = OffsetDateTime::now_utc();
+        let stamped = metadata
+            .update_config(BUCKET_POLICY_CONFIG, br#"{"Version":"2012-10-17","Statement":[]}"#.to_vec())
+            .unwrap();
+        assert!(stamped >= before, "a local edit is stamped with the local clock");
+        assert_eq!(metadata.policy_config_updated_at, stamped);
+        assert_eq!(
+            metadata.tagging_config_updated_at, source_time,
+            "restamping one config must not move another config's stamp"
+        );
+    }
+
    #[test]
    fn object_locking_requires_lock_metadata_not_plain_versioning() {
        use s3s::dto::ObjectLockEnabled;
@@ -1629,6 +1657,34 @@ mod test {
        assert!(bm.bucket_target_config.is_none());
    }

+    /// rustfs/backlog#2309: the MinIO-origin `.metadata.bin` this repository
+    /// already carries as a compatibility fixture stores
+    /// `BucketTargetsConfigJSON` as a bare JSON array, which `BucketTargets`
+    /// (a `{"targets":[…]}` struct with no array fallback) cannot decode. The
+    /// bytes below are the exact payload the fixture in
+    /// `metadata_test.rs::TEST_BUCKET_METADATA_HEX` decodes to, so if RustFS
+    /// ever grows the array-shaped compatibility parse, this test is where the
+    /// upgrade break is pinned and where the decision has to be recorded.
+    #[test]
+    fn minio_array_shaped_bucket_targets_are_unreadable() {
+        let minio_array = br#"[{"endpoint":"http://target.example.com","targetBucket":"tb","region":"us-east-1"}]"#.to_vec();
+        let mut bm = BucketMetadata::new("minio-array-targets");
+        bm.bucket_targets_config_json = minio_array.clone();
+
+        bm.parse_all_configs()
+            .expect("a MinIO-shaped targets blob must not fail the whole metadata load");
+
+        assert!(
+            bm.bucket_targets_unreadable(),
+            "an array-shaped MinIO targets blob is unreadable, not an empty target set"
+        );
+        assert!(bm.bucket_target_config.is_none());
+        assert_eq!(
+            bm.bucket_targets_config_json, minio_array,
+            "the raw MinIO bytes must survive so the configuration stays recoverable"
+        );
+    }
+
    /// The invariant every branch of `parse_all_configs` shares: a stored but
    /// undecodable payload keeps its raw bytes and leaves the typed field
    /// `None`, so no branch fabricates a value. What a reader may then do with
@@ -1978,51 +2034,30 @@ mod test {

    const ODM_JSON: &[u8] = br#"{"version":1,"enabled":true,"source":{"provider":"minio","endpoint":"https://legacy.example.com:9000","region":"auto","bucket":"legacy-bucket","credentials":{"access_key":"AK","secret_key":"SK"}}}"#;

-    /// rustfs/backlog#2148: the on-demand migration config is a RustFS
-    /// extension entry that round-trips through `update_config` and the
-    /// msgpack codec, clears on delete, and never parses corruption into a
-    /// default.
+    /// The metadata codec preserves application-owned bytes and timestamps.
    #[test]
    fn on_demand_migration_config_round_trips_and_tracks_updates() {
-        use crate::bucket::on_demand_migration::{OnDemandMigrationConfig, OnDemandMigrationConfigError};
-
        let mut bm = BucketMetadata::new("odm-bucket");
-        assert_eq!(bm.on_demand_migration_config(), Ok(None), "fresh metadata carries no config");
-
-        let expected = OnDemandMigrationConfig::from_json(ODM_JSON).unwrap();
+        assert_eq!(bm.on_demand_migration_config(), None, "fresh metadata carries no config");
        bm.update_config(BUCKET_ON_DEMAND_MIGRATION_CONFIG, ODM_JSON.to_vec())
-            .expect("valid config is accepted");
-        assert_ne!(bm.on_demand_migration_config_updated_at, OffsetDateTime::UNIX_EPOCH);
-        assert_eq!(bm.on_demand_migration_config(), Ok(Some(expected.clone())));
-
+            .expect("opaque config is accepted");
+        let stamped = bm.on_demand_migration_config_updated_at;
+        assert_ne!(stamped, OffsetDateTime::UNIX_EPOCH);
+        assert_eq!(bm.on_demand_migration_config(), Some((ODM_JSON, stamped)));
        let back = BucketMetadata::unmarshal(&bm.marshal_msg().unwrap()).unwrap();
        assert_eq!(back.on_demand_migration_config_json, bm.on_demand_migration_config_json);
-        assert_eq!(
-            back.on_demand_migration_config_updated_at.unix_timestamp(),
-            bm.on_demand_migration_config_updated_at.unix_timestamp()
-        );
-        assert_eq!(back.on_demand_migration_config(), Ok(Some(expected)));
-
-        // A blob this build cannot read is rejected at the write boundary
-        // rather than persisted for every reader to trip over.
-        let before = bm.on_demand_migration_config_json.clone();
-        assert!(
-            bm.update_config(BUCKET_ON_DEMAND_MIGRATION_CONFIG, br#"{"source":{"provider":"s3"},"bogus":1}"#.to_vec())
-                .is_err()
-        );
-        assert_eq!(bm.on_demand_migration_config_json, before, "a rejected update leaves the blob untouched");
-
-        // Delete clears the entry.
-        let stamped = bm.on_demand_migration_config_updated_at;
+        assert_eq!(back.on_demand_migration_config_updated_at.unix_timestamp(), stamped.unix_timestamp());
        bm.update_config(BUCKET_ON_DEMAND_MIGRATION_CONFIG, Vec::new()).unwrap();
        assert!(bm.on_demand_migration_config_json.is_empty());
-        assert_eq!(bm.on_demand_migration_config(), Ok(None));
+        assert_eq!(bm.on_demand_migration_config(), None);
        assert!(bm.on_demand_migration_config_updated_at >= stamped);
-
-        // Corruption that bypassed `update_config` (disk, another writer)
-        // is a typed error, never a default.
-        bm.on_demand_migration_config_json = b"not-json".to_vec();
-        assert!(matches!(bm.on_demand_migration_config(), Err(OnDemandMigrationConfigError::Malformed(_))));
+        bm.update_config(BUCKET_ON_DEMAND_MIGRATION_CONFIG, b"not-json".to_vec())
+            .unwrap();
+        let back = BucketMetadata::unmarshal(&bm.marshal_msg().unwrap()).unwrap();
+        assert_eq!(
+            back.on_demand_migration_config_json, b"not-json",
+            "metadata must not reinterpret application bytes"
+        );
    }

    /// rustfs/backlog#2148: a `.metadata.bin` written before the on-demand
@@ -2034,7 +2069,7 @@ mod test {
        let mut bm = BucketMetadata::unmarshal(&blob[4..]).expect("unmarshal MinIO bucket metadata");
        assert!(bm.on_demand_migration_config_json.is_empty());
        assert_eq!(bm.on_demand_migration_config_updated_at, OffsetDateTime::UNIX_EPOCH);
-        assert_eq!(bm.on_demand_migration_config(), Ok(None));
+        assert_eq!(bm.on_demand_migration_config(), None);

        bm.default_timestamps();
        assert_ne!(bm.created, OffsetDateTime::UNIX_EPOCH, "fixture must carry a real creation time");
@@ -19,7 +19,6 @@ use super::quota::BucketQuota;
 use super::target::BucketTargets;
 use crate::bucket::bucket_target_sys::BucketTargetSys;
 use crate::bucket::metadata::{load_bucket_metadata_parse, load_bucket_metadata_parse_with_presence};
-use crate::bucket::on_demand_migration::{ON_DEMAND_MIGRATION_CONFIG_HOOK, OnDemandMigrationConfig};
 use crate::bucket::utils::is_meta_bucketname;
 use crate::disk::RUSTFS_META_BUCKET;
 use crate::error::{Error, Result, is_err_bucket_not_found, is_err_strict_volume_not_found};
@@ -49,6 +48,11 @@ use tokio_util::sync::CancellationToken;
 use tracing::{error, warn};
 use uuid::Uuid;

+/// Opaque bucket configuration notifications for application-owned services.
+/// `None` withdraws a configuration; consumers validate nonempty bytes.
+pub type BucketConfigPublishHook = Box<dyn Fn(&str, &str, Option<(&[u8], OffsetDateTime, Uuid)>) + Send + Sync>;
+pub static BUCKET_CONFIG_PUBLISH_HOOK: std::sync::OnceLock<BucketConfigPublishHook> = std::sync::OnceLock::new();
+
 const BUCKET_METADATA_REFRESH_INTERVAL: Duration = Duration::from_secs(15 * 60);

 #[cfg(any(test, feature = "test-util"))]
@@ -395,39 +399,21 @@ fn clear_bucket_durability(bucket: &str) {
    crate::disk::local::bucket_durability::set(bucket, None);
 }

-/// Publish the bucket's on-demand migration config (or its absence) to the
-/// runtime registered in `ON_DEMAND_MIGRATION_CONFIG_HOOK`.
-///
-/// Called from the same five cache-install paths as
-/// [`sync_bucket_durability`]. A stored payload this build cannot parse is
-/// published as `None`: the runtime must stop pulling for that bucket rather
-/// than keep an older config or guess.
+/// Publish application-owned bytes on every cache install path.
 fn sync_on_demand_migration(bucket: &str, bm: &BucketMetadata) {
-    let Some(hook) = ON_DEMAND_MIGRATION_CONFIG_HOOK.get() else {
-        return;
-    };
-    match bm.on_demand_migration_config() {
-        Ok(config) => hook(bucket, config.as_ref()),
-        Err(err) => {
-            warn!(
-                event = "bucket_metadata_parse_failed",
-                component = "ecstore",
-                subsystem = "bucket_metadata",
-                bucket = %bucket,
-                config = "on_demand_migration",
-                error = %err,
-                "Failed to parse bucket metadata config"
+    if let Some(hook) = BUCKET_CONFIG_PUBLISH_HOOK.get() {
+        hook(
+            bucket,
+            super::metadata::BUCKET_ON_DEMAND_MIGRATION_CONFIG,
+            bm.on_demand_migration_config()
+                .map(|(bytes, stamp)| (bytes, stamp, bm.bucket_incarnation_id)),
        );
-            hook(bucket, None);
-        }
    }
 }

-/// Withdraw a bucket's on-demand migration config when its metadata leaves
-/// the cache.
 fn clear_on_demand_migration(bucket: &str) {
-    if let Some(hook) = ON_DEMAND_MIGRATION_CONFIG_HOOK.get() {
-        hook(bucket, None);
+    if let Some(hook) = BUCKET_CONFIG_PUBLISH_HOOK.get() {
+        hook(bucket, super::metadata::BUCKET_ON_DEMAND_MIGRATION_CONFIG, None);
    }
 }

@@ -581,6 +567,32 @@ pub async fn update_if_incarnation(
        config_file,
        data,
        Some(expected_incarnation_id),
+        None,
+    ))
+    .await
+}
+
+/// [`update_if_incarnation`] stamping the config with `updated_at` instead of
+/// the local clock.
+///
+/// For a site-replication receiver the edit's source time is the peer's
+/// `updated_at`; persisting it keeps the stored `*_config_updated_at` on the
+/// source clock so the next item's staleness is judged source-time against
+/// source-time (backlog#2292). See [`BucketMetadata::update_config_at`].
+pub async fn update_if_incarnation_at(
+    bucket: &str,
+    config_file: &str,
+    data: Vec<u8>,
+    expected_incarnation_id: Uuid,
+    updated_at: OffsetDateTime,
+) -> Result<OffsetDateTime> {
+    Box::pin(update_with_sys_expected(
+        get_bucket_metadata_sys()?,
+        bucket,
+        config_file,
+        data,
+        Some(expected_incarnation_id),
+        Some(updated_at),
    ))
    .await
 }
@@ -591,6 +603,30 @@ pub async fn delete_if_incarnation(bucket: &str, config_file: &str, expected_inc
        bucket,
        config_file,
        Some(expected_incarnation_id),
+        None,
+    ))
+    .await
+}
+
+/// [`delete_if_incarnation`] stamping the cleared config with `updated_at`
+/// (a replicated deletion's source time) instead of the local clock.
+///
+/// The stamp survives the deletion as the config's `*_config_updated_at`, and
+/// that is what the next incoming item is judged against: a local stamp on
+/// the delete would reject a newer source re-create that was merely delivered
+/// later (backlog#2292). See [`update_if_incarnation_at`].
+pub async fn delete_if_incarnation_at(
+    bucket: &str,
+    config_file: &str,
+    expected_incarnation_id: Uuid,
+    updated_at: OffsetDateTime,
+) -> Result<OffsetDateTime> {
+    Box::pin(delete_with_sys_expected(
+        get_bucket_metadata_sys()?,
+        bucket,
+        config_file,
+        Some(expected_incarnation_id),
+        Some(updated_at),
    ))
    .await
 }
@@ -612,34 +648,41 @@ async fn update_with_sys(
    config_file: &str,
    data: Vec<u8>,
 ) -> Result<OffsetDateTime> {
-    update_with_sys_expected(sys, bucket, config_file, data, None).await
+    update_with_sys_expected(sys, bucket, config_file, data, None, None).await
 }

+/// `updated_at` is the stamp persisted on the config; `None` uses the local
+/// clock (the edit originates here), `Some` carries a replicated edit's
+/// source time (backlog#2292).
 async fn update_with_sys_expected(
    sys: Arc<RwLock<BucketMetadataSys>>,
    bucket: &str,
    config_file: &str,
    data: Vec<u8>,
    expected_incarnation_id: Option<Uuid>,
+    updated_at: Option<OffsetDateTime>,
 ) -> Result<OffsetDateTime> {
    let guard = acquire_config_write_guard_for_incarnation(sys.clone(), bucket, expected_incarnation_id).await?;
-    update_under_config_write_guard(sys, &guard, config_file, data).await
+    update_under_config_write_guard(sys, &guard, config_file, data, updated_at).await
 }

 /// [`delete`] against an explicitly supplied metadata system. See
 /// [`update_with_sys`].
 async fn delete_with_sys(sys: Arc<RwLock<BucketMetadataSys>>, bucket: &str, config_file: &str) -> Result<OffsetDateTime> {
-    delete_with_sys_expected(sys, bucket, config_file, None).await
+    delete_with_sys_expected(sys, bucket, config_file, None, None).await
 }

+/// `updated_at`: `None` stamps the local clock; `Some` persists a replicated
+/// deletion's source time (backlog#2292).
 async fn delete_with_sys_expected(
    sys: Arc<RwLock<BucketMetadataSys>>,
    bucket: &str,
    config_file: &str,
    expected_incarnation_id: Option<Uuid>,
+    updated_at: Option<OffsetDateTime>,
 ) -> Result<OffsetDateTime> {
    let guard = acquire_config_write_guard_for_incarnation(sys.clone(), bucket, expected_incarnation_id).await?;
-    delete_under_config_write_guard(sys, &guard, config_file).await
+    delete_under_config_write_guard(sys, &guard, config_file, updated_at).await
 }

 /// Owns the complete bucket-config mutation fence.
@@ -786,7 +829,21 @@ pub async fn update_under_transaction_lock(
    data: Vec<u8>,
 ) -> Result<OffsetDateTime> {
    guard.ensure_valid(bucket)?;
-    update_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file, data).await
+    update_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file, data, None).await
+}
+
+/// [`update_under_transaction_lock`] stamping the config with `updated_at`
+/// (a replicated edit's source time) instead of the local clock; see
+/// [`update_if_incarnation_at`] (backlog#2292).
+pub async fn update_under_transaction_lock_at(
+    guard: &BucketMetadataMutationGuard,
+    bucket: &str,
+    config_file: &str,
+    data: Vec<u8>,
+    updated_at: OffsetDateTime,
+) -> Result<OffsetDateTime> {
+    guard.ensure_valid(bucket)?;
+    update_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file, data, Some(updated_at)).await
 }

 /// Clear one config file while the caller holds this bucket's transaction lock.
@@ -796,7 +853,7 @@ pub async fn delete_under_transaction_lock(
    config_file: &str,
 ) -> Result<OffsetDateTime> {
    guard.ensure_valid(bucket)?;
-    delete_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file).await
+    delete_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file, None).await
 }

 pub async fn update_quota_if_incarnation(
@@ -804,6 +861,29 @@ pub async fn update_quota_if_incarnation(
    data: Vec<u8>,
    expected_incarnation_id: Uuid,
    proof: &crate::services::notification_sys::CrossPoolFenceFleetProofToken,
+) -> Result<OffsetDateTime> {
+    update_quota_if_incarnation_stamped(bucket, data, expected_incarnation_id, proof, None).await
+}
+
+/// [`update_quota_if_incarnation`] stamping the quota config with
+/// `updated_at` (a replicated edit's source time) instead of the local
+/// clock; see [`update_if_incarnation_at`] (backlog#2292).
+pub async fn update_quota_if_incarnation_at(
+    bucket: &str,
+    data: Vec<u8>,
+    expected_incarnation_id: Uuid,
+    proof: &crate::services::notification_sys::CrossPoolFenceFleetProofToken,
+    updated_at: OffsetDateTime,
+) -> Result<OffsetDateTime> {
+    update_quota_if_incarnation_stamped(bucket, data, expected_incarnation_id, proof, Some(updated_at)).await
+}
+
+async fn update_quota_if_incarnation_stamped(
+    bucket: &str,
+    data: Vec<u8>,
+    expected_incarnation_id: Uuid,
+    proof: &crate::services::notification_sys::CrossPoolFenceFleetProofToken,
+    updated_at: Option<OffsetDateTime>,
 ) -> Result<OffsetDateTime> {
    let sys = get_bucket_metadata_sys()?;
    let guard = Box::pin(acquire_config_write_guard_for_incarnation(
@@ -821,7 +901,7 @@ pub async fn update_quota_if_incarnation(
            achieved: 0,
        });
    }
-    update_under_config_write_guard(sys, &guard, rustfs_config::QUOTA_CONFIG_FILE, data).await
+    update_under_config_write_guard(sys, &guard, rustfs_config::QUOTA_CONFIG_FILE, data, updated_at).await
 }

 pub async fn update_bucket_targets_under_transaction_lock(
@@ -837,6 +917,7 @@ async fn update_under_config_write_guard(
    guard: &BucketMetadataMutationGuard,
    config_file: &str,
    data: Vec<u8>,
+    updated_at: Option<OffsetDateTime>,
 ) -> Result<OffsetDateTime> {
    guard.ensure_valid(&guard.bucket)?;
    let metadata_sys = sys.read().await.clone();
@@ -848,7 +929,7 @@ async fn update_under_config_write_guard(
            Some(&guard.transaction_guard),
            &guard.bucket,
            "bucket config transaction",
-            metadata_sys.update_checked(&guard.bucket, config_file, data, true, guard.incarnation_id),
+            metadata_sys.update_checked(&guard.bucket, config_file, data, true, guard.incarnation_id, updated_at),
        ),
    )
    .await?;
@@ -860,6 +941,7 @@ async fn delete_under_config_write_guard(
    sys: Arc<RwLock<BucketMetadataSys>>,
    guard: &BucketMetadataMutationGuard,
    config_file: &str,
+    updated_at: Option<OffsetDateTime>,
 ) -> Result<OffsetDateTime> {
    guard.ensure_valid(&guard.bucket)?;
    let metadata_sys = sys.read().await.clone();
@@ -871,7 +953,7 @@ async fn delete_under_config_write_guard(
            Some(&guard.transaction_guard),
            &guard.bucket,
            "bucket config deletion transaction",
-            metadata_sys.update_checked(&guard.bucket, config_file, Vec::new(), false, guard.incarnation_id),
+            metadata_sys.update_checked(&guard.bucket, config_file, Vec::new(), false, guard.incarnation_id, updated_at),
        ),
    )
    .await?;
@@ -1049,15 +1131,21 @@ pub async fn get_durability_config(
 }

 /// The bucket's on-demand migration config with its update time, or
-/// `Ok(None)` when the bucket has none. A stored payload that does not parse
-/// is a typed error (`OnDemandMigrationConfigError` inside `Error::Io`).
-pub async fn get_on_demand_migration_config(bucket: &str) -> Result<Option<(OnDemandMigrationConfig, OffsetDateTime)>> {
+/// `Ok(None)` when the bucket has none. Bytes are opaque to the metadata owner.
+pub async fn get_on_demand_migration_config(bucket: &str) -> Result<Option<(Vec<u8>, OffsetDateTime)>> {
    let bucket_meta_sys_lock = get_bucket_metadata_sys()?;
    let bucket_meta_sys = bucket_meta_sys_lock.read().await;

    bucket_meta_sys.get_on_demand_migration_config(bucket).await
 }

+/// Resolve opaque configuration from the store's own metadata system.
+pub async fn get_on_demand_migration_config_in(api: &ECStore, bucket: &str) -> Result<Option<(Vec<u8>, OffsetDateTime)>> {
+    let sys = bucket_metadata_sys_of(&api.ctx)?;
+    let lock = sys.read().await;
+    lock.get_on_demand_migration_config(bucket).await
+}
+
 pub async fn get_quota_config(bucket: &str) -> Result<(BucketQuota, OffsetDateTime)> {
    let bucket_meta_sys_lock = get_bucket_metadata_sys()?;
    let bucket_meta_sys = bucket_meta_sys_lock.read().await;
@@ -1770,15 +1858,17 @@ impl BucketMetadataSys {
    /// `update` and the config read alone). Keep these boxed.
    pub async fn update(&self, bucket: &str, config_file: &str, data: Vec<u8>) -> Result<OffsetDateTime> {
        let incarnation_id = Box::pin(self.get_bucket_incarnation_id(bucket)).await?;
-        Box::pin(self.update_checked(bucket, config_file, data, true, incarnation_id)).await
+        Box::pin(self.update_checked(bucket, config_file, data, true, incarnation_id, None)).await
    }

    pub async fn delete(&self, bucket: &str, config_file: &str) -> Result<OffsetDateTime> {
        let incarnation_id = self.get_bucket_incarnation_id(bucket).await?;
-        self.update_checked(bucket, config_file, Vec::new(), false, incarnation_id)
+        self.update_checked(bucket, config_file, Vec::new(), false, incarnation_id, None)
            .await
    }

+    /// `updated_at`: `None` stamps the local clock; `Some` persists a
+    /// replicated edit's source time (backlog#2292).
    async fn update_checked(
        &self,
        bucket: &str,
@@ -1786,6 +1876,7 @@ impl BucketMetadataSys {
        data: Vec<u8>,
        parse: bool,
        expected_incarnation_id: Uuid,
+        updated_at: Option<OffsetDateTime>,
    ) -> Result<OffsetDateTime> {
        // Load through this system's own store, the one `save` persists to
        // (backlog#1052 S7). Reading from the ambient handle instead made the
@@ -1796,7 +1887,10 @@ impl BucketMetadataSys {
            return Err(Error::BucketNotFound(bucket.to_string()));
        }

-        let updated = bm.update_config(config_file, data)?;
+        let updated = match updated_at {
+            Some(updated_at) => bm.update_config_at(config_file, data, updated_at)?,
+            None => bm.update_config(config_file, data)?,
+        };

        Box::pin(self.save(bm)).await?;

@@ -2579,29 +2673,27 @@ impl BucketMetadataSys {
    }

    /// See [`get_on_demand_migration_config`].
-    pub async fn get_on_demand_migration_config(
-        &self,
-        bucket: &str,
-    ) -> Result<Option<(OnDemandMigrationConfig, OffsetDateTime)>> {
+    pub async fn get_on_demand_migration_config(&self, bucket: &str) -> Result<Option<(Vec<u8>, OffsetDateTime)>> {
        let (bm, _) = self.get_config(bucket).await?;

-        let config = bm.on_demand_migration_config().map_err(Error::other)?;
-        Ok(config.map(|config| (config, bm.on_demand_migration_config_updated_at)))
+        Ok(bm
+            .on_demand_migration_config()
+            .map(|(bytes, updated_at)| (bytes.to_vec(), updated_at)))
    }
 }

 /// Test-only fixture shared with sibling modules (e.g. the quota checker
 /// tests): a 4-disk `ECStore` on an isolated instance context, so tests
 /// exercising the metadata system never touch ambient process state.
-#[cfg(test)]
-pub(crate) mod test_support {
+#[cfg(any(test, feature = "test-util"))]
+pub mod test_support {
    use super::*;
    use crate::disk::endpoint::Endpoint;
    use crate::layout::endpoints::{EndpointServerPools, Endpoints, PoolEndpoints};
    use crate::runtime::instance::InstanceContext;
    use crate::store::init_local_disks_with_instance_ctx;

-    pub(crate) async fn isolated_store_over_temp_disks() -> (Vec<tempfile::TempDir>, Arc<ECStore>) {
+    pub async fn isolated_store_over_temp_disks() -> (Vec<tempfile::TempDir>, Arc<ECStore>) {
        let mut dirs = Vec::with_capacity(4);
        let mut endpoints = Vec::with_capacity(4);
        for disk_idx in 0..4 {
@@ -3765,6 +3857,106 @@ mod tests {
        );
    }

+    /// backlog#2292: the explicit-stamp write path persists the given source
+    /// time as the config's `*_config_updated_at` — through the incarnation
+    /// path and through an already-held transaction guard — and survives a
+    /// reload from disk, while the plain path keeps stamping the local clock.
+    #[tokio::test]
+    async fn explicit_updated_at_is_persisted_as_the_config_stamp() {
+        let (dirs, ecstore) = isolated_store_over_temp_disks().await;
+        let bucket = "source-stamped-config";
+        for dir in &dirs {
+            std::fs::create_dir_all(dir.path().join(bucket)).expect("bucket volume should be created");
+        }
+        let sys = Arc::new(RwLock::new(BucketMetadataSys::new(ecstore)));
+        let source_time = OffsetDateTime::now_utc() - Duration::from_secs(3 * 3600);
+        let policy = br#"{"Version":"2012-10-17","Statement":[]}"#.to_vec();
+        let tagging = b"<Tagging><TagSet><Tag><Key>k</Key><Value>v</Value></Tag></TagSet></Tagging>".to_vec();
+
+        // Incarnation path (`update_if_incarnation_at` minus the ambient lookup).
+        let stamped =
+            update_with_sys_expected(sys.clone(), bucket, BUCKET_POLICY_CONFIG, policy.clone(), None, Some(source_time))
+                .await
+                .expect("source-stamped policy write should persist");
+        assert_eq!(stamped, source_time);
+
+        // Held-guard path (`update_under_transaction_lock_at` minus the ambient lookup).
+        let guard = acquire_config_write_guard(sys.clone(), bucket).await.expect("write guard");
+        let stamped = update_under_config_write_guard(sys.clone(), &guard, BUCKET_TAGGING_CONFIG, tagging, Some(source_time))
+            .await
+            .expect("source-stamped tagging write should persist");
+        drop(guard);
+        assert_eq!(stamped, source_time);
+
+        let metadata_sys = sys.read().await.clone();
+        metadata_sys.metadata_map.write().await.clear();
+        let reloaded = metadata_sys.get_config_from_disk(bucket).await.expect("reload from disk");
+        assert_eq!(reloaded.policy_config_updated_at, source_time);
+        assert_eq!(reloaded.tagging_config_updated_at, source_time);
+
+        // The plain path is unchanged: a local edit is stamped with the local clock.
+        let before = OffsetDateTime::now_utc();
+        let stamped = update_with_sys(sys.clone(), bucket, BUCKET_POLICY_CONFIG, policy)
+            .await
+            .expect("locally stamped policy write should persist");
+        assert!(stamped >= before, "the plain write path must keep stamping the local clock");
+        let reloaded = metadata_sys.get_config_from_disk(bucket).await.expect("reload from disk");
+        assert_eq!(reloaded.policy_config_updated_at, stamped);
+        assert_eq!(
+            reloaded.tagging_config_updated_at, source_time,
+            "an unrelated config keeps its source stamp"
+        );
+    }
+
+    /// backlog#2292: a replicated delete persists the source time as the
+    /// cleared config's `*_config_updated_at`, so the receive-side gate
+    /// (source time against stored stamp) lets a newer source re-create land
+    /// even when the delete was applied later than the re-create's source
+    /// time; the plain delete keeps stamping the local clock.
+    #[tokio::test]
+    async fn explicit_updated_at_is_persisted_by_a_delete() {
+        let (dirs, ecstore) = isolated_store_over_temp_disks().await;
+        let bucket = "source-stamped-delete";
+        for dir in &dirs {
+            std::fs::create_dir_all(dir.path().join(bucket)).expect("bucket volume should be created");
+        }
+        let sys = Arc::new(RwLock::new(BucketMetadataSys::new(ecstore)));
+        let policy = br#"{"Version":"2012-10-17","Statement":[]}"#.to_vec();
+        let created_at = OffsetDateTime::now_utc() - Duration::from_secs(3 * 3600);
+        let deleted_at = created_at + Duration::from_secs(60);
+        let recreated_at = deleted_at + Duration::from_secs(60);
+
+        update_with_sys_expected(sys.clone(), bucket, BUCKET_POLICY_CONFIG, policy.clone(), None, Some(created_at))
+            .await
+            .expect("source-stamped policy write should persist");
+        let stamped = delete_with_sys_expected(sys.clone(), bucket, BUCKET_POLICY_CONFIG, None, Some(deleted_at))
+            .await
+            .expect("source-stamped policy delete should persist");
+        assert_eq!(stamped, deleted_at);
+
+        let metadata_sys = sys.read().await.clone();
+        metadata_sys.metadata_map.write().await.clear();
+        let reloaded = metadata_sys.get_config_from_disk(bucket).await.expect("reload from disk");
+        assert!(reloaded.policy_config_json.is_empty(), "the delete cleared the payload");
+        assert_eq!(reloaded.policy_config_updated_at, deleted_at, "the delete kept the source stamp");
+        assert!(
+            recreated_at >= reloaded.policy_config_updated_at,
+            "a re-create newer than the delete's source time is not stale against the stored stamp"
+        );
+
+        // The plain delete path is unchanged: stamped with the local clock.
+        update_with_sys_expected(sys.clone(), bucket, BUCKET_POLICY_CONFIG, policy, None, Some(recreated_at))
+            .await
+            .expect("re-create should persist");
+        let before = OffsetDateTime::now_utc();
+        let stamped = delete_with_sys_expected(sys.clone(), bucket, BUCKET_POLICY_CONFIG, None, None)
+            .await
+            .expect("locally stamped delete should persist");
+        assert!(stamped >= before, "the plain delete path must keep stamping the local clock");
+        let reloaded = metadata_sys.get_config_from_disk(bucket).await.expect("reload from disk");
+        assert_eq!(reloaded.policy_config_updated_at, stamped);
+    }
+
    /// The load and the persisted write share one write guard, so concurrent
    /// rewrites of the same config compose instead of clobbering each other.
    /// Moving the load outside that guard loses all but the last tag.
@@ -3981,8 +4173,14 @@ mod tests {
        let new_incarnation = store.bucket_incarnation_id_from_disk(bucket).await.unwrap();
        assert_ne!(old_incarnation, new_incarnation);

-        let err =
-            update_with_sys_expected(sys.clone(), bucket, BUCKET_TAGGING_CONFIG, b"<Tagging/>".to_vec(), Some(old_incarnation))
+        let err = update_with_sys_expected(
+            sys.clone(),
+            bucket,
+            BUCKET_TAGGING_CONFIG,
+            b"<Tagging/>".to_vec(),
+            Some(old_incarnation),
+            None,
+        )
        .await
        .expect_err("a request authorized for the deleted incarnation must fail closed");
        assert!(matches!(err, Error::BucketNotFound(name) if name == bucket));
@@ -4019,7 +4217,7 @@ mod tests {
            }],
        })
        .unwrap();
-        update_under_config_write_guard(sys, &guard, BUCKET_TAGGING_CONFIG, tagging)
+        update_under_config_write_guard(sys, &guard, BUCKET_TAGGING_CONFIG, tagging, None)
            .await
            .unwrap();
        assert!(!delete.is_finished());
@@ -4385,19 +4583,26 @@ mod tests {

    const ODM_JSON: &[u8] = br#"{"source":{"provider":"minio","endpoint":"https://legacy.example.com:9000","region":"auto","bucket":"legacy-bucket","credentials":{"access_key":"AK","secret_key":"SK"}}}"#;

+    type RecordedOdmConfig = Option<(Vec<u8>, OffsetDateTime, Uuid)>;
+    type RecordedOdmHookCall = (String, RecordedOdmConfig);
+
    /// Every `(bucket, config)` the recording hook has seen. Tests filter by
    /// their own bucket name; the hook is process-wide and set once.
-    static ODM_HOOK_CALLS: std::sync::Mutex<Vec<(String, Option<OnDemandMigrationConfig>)>> = std::sync::Mutex::new(Vec::new());
+    static ODM_HOOK_CALLS: std::sync::Mutex<Vec<RecordedOdmHookCall>> = std::sync::Mutex::new(Vec::new());

    fn install_recording_odm_hook() {
-        ON_DEMAND_MIGRATION_CONFIG_HOOK.get_or_init(|| {
-            Box::new(|bucket, config| {
-                ODM_HOOK_CALLS.lock().unwrap().push((bucket.to_string(), config.cloned()));
+        BUCKET_CONFIG_PUBLISH_HOOK.get_or_init(|| {
+            Box::new(|bucket, config_file, config| {
+                assert_eq!(config_file, super::super::metadata::BUCKET_ON_DEMAND_MIGRATION_CONFIG);
+                ODM_HOOK_CALLS.lock().unwrap().push((
+                    bucket.to_string(),
+                    config.map(|(bytes, stamp, incarnation)| (bytes.to_vec(), stamp, incarnation)),
+                ));
            })
        });
    }

-    fn odm_hook_calls(bucket: &str) -> Vec<Option<OnDemandMigrationConfig>> {
+    fn odm_hook_calls(bucket: &str) -> Vec<RecordedOdmConfig> {
        ODM_HOOK_CALLS
            .lock()
            .unwrap()
@@ -4407,54 +4612,6 @@ mod tests {
            .collect()
    }

-    /// rustfs/backlog#2148: the accessor reports absence as `Ok(None)` and a
-    /// stored payload it cannot parse as a typed error, never as a default
-    /// and never as `ConfigNotFound`.
-    #[tokio::test]
-    async fn get_on_demand_migration_config_distinguishes_absent_from_corrupt() {
-        use crate::bucket::on_demand_migration::OnDemandMigrationConfigError;
-
-        let (_dirs, ecstore) = isolated_store_over_temp_disks().await;
-        let sys = BucketMetadataSys::new(ecstore);
-        let bucket = "odm-accessor";
-
-        sys.set(bucket.to_string(), Arc::new(BucketMetadata::new(bucket))).await;
-        assert_eq!(sys.get_on_demand_migration_config(bucket).await.unwrap(), None);
-
-        let mut corrupt = BucketMetadata::new(bucket);
-        corrupt.on_demand_migration_config_json = br#"{"source":{"provider":"s3"},"bogus":1}"#.to_vec();
-        sys.set(bucket.to_string(), Arc::new(corrupt)).await;
-        let err = sys
-            .get_on_demand_migration_config(bucket)
-            .await
-            .expect_err("corrupt config must not read as a default");
-        assert_ne!(err, Error::ConfigNotFound, "corruption must not be reported as absence");
-        let typed = match &err {
-            Error::Io(io) => io
-                .get_ref()
-                .and_then(|source| source.downcast_ref::<OnDemandMigrationConfigError>()),
-            _ => None,
-        };
-        assert!(
-            matches!(typed, Some(OnDemandMigrationConfigError::Malformed(_))),
-            "typed parse error must survive the Result boundary, got: {err:?}"
-        );
-
-        let mut valid = BucketMetadata::new(bucket);
-        valid
-            .update_config(crate::bucket::metadata::BUCKET_ON_DEMAND_MIGRATION_CONFIG, ODM_JSON.to_vec())
-            .unwrap();
-        let stamped = valid.on_demand_migration_config_updated_at;
-        sys.set(bucket.to_string(), Arc::new(valid)).await;
-        let (config, updated_at) = sys
-            .get_on_demand_migration_config(bucket)
-            .await
-            .unwrap()
-            .expect("stored config is returned");
-        assert_eq!(config, OnDemandMigrationConfig::from_json(ODM_JSON).unwrap());
-        assert_eq!(updated_at, stamped);
-    }
-
    /// rustfs/backlog#2148: the publish hook fires on every path that
    /// installs bucket metadata into the cache (set, initial load, peer
    /// reload, refresh loop, lazy load) and withdraws on removal, mirroring
@@ -4468,15 +4625,22 @@ mod tests {
        for dir in &dirs {
            std::fs::create_dir_all(dir.path().join(bucket)).expect("physical bucket should exist");
        }
-        let expected = OnDemandMigrationConfig::from_json(ODM_JSON).unwrap();
+
+        let incarnation = Uuid::new_v4();
        let expect_publish = |before: usize, label: &str| {
            let calls = odm_hook_calls(bucket);
            assert_eq!(calls.len(), before + 1, "{label} must publish exactly once");
-            assert_eq!(calls.last().unwrap().as_ref(), Some(&expected), "{label} must publish the stored config");
+            assert_eq!(
+                calls.last().unwrap().as_ref().map(|(bytes, _, _)| bytes.as_slice()),
+                Some(ODM_JSON),
+                "{label} must publish the stored bytes"
+            );
+            assert_eq!(calls.last().unwrap().as_ref().map(|(_, _, id)| *id), Some(incarnation));
        };

        // set (via persist_new_and_set, which installs through `set`).
        let mut bm = BucketMetadata::new(bucket);
+        bm.bucket_incarnation_id = incarnation;
        bm.update_config(crate::bucket::metadata::BUCKET_ON_DEMAND_MIGRATION_CONFIG, ODM_JSON.to_vec())
            .unwrap();
        let writer = BucketMetadataSys::new(ecstore.clone());
@@ -4518,14 +4682,18 @@ mod tests {
        assert_eq!(calls.len(), before + 1, "remove must withdraw exactly once");
        assert_eq!(calls.last().unwrap(), &None);

-        // A corrupt payload is withdrawn, never published as a config.
+        // Opaque bytes reach the application even if they are not valid JSON.
        let mut corrupt = BucketMetadata::new(bucket);
        corrupt.on_demand_migration_config_json = b"not-json".to_vec();
        let before = odm_hook_calls(bucket).len();
        lazy.set(bucket.to_string(), Arc::new(corrupt)).await;
        let calls = odm_hook_calls(bucket);
        assert_eq!(calls.len(), before + 1);
-        assert_eq!(calls.last().unwrap(), &None, "unreadable config must publish absence");
+        assert_eq!(
+            calls.last().unwrap().as_ref().map(|(bytes, _, _)| bytes.as_slice()),
+            Some(b"not-json".as_slice()),
+            "the application validates opaque config bytes"
+        );
    }

    #[tokio::test]
@@ -26,7 +26,6 @@ mod metadata_test;
 pub mod migration;
 mod msgp_decode;
 pub mod object_lock;
-pub mod on_demand_migration;
 pub mod policy_sys;
 pub mod quota;
 pub mod remote_s3_client;
@@ -180,6 +180,8 @@ impl RemoteS3EndpointSpec {

 #[derive(Debug, thiserror::Error)]
 pub enum RemoteS3ClientError {
+    #[error("the {0} backend is not included in this build")]
+    BackendNotCompiled(&'static str),
    #[error("remote endpoint requires credentials")]
    MissingCredentials,
    #[error("{0}")]
@@ -281,9 +283,7 @@ impl Intercept for UserAgentSuffixInterceptor {

 /// Builds the SDK config for `spec` without finalizing it, so callers can add
 /// interceptors or (in tests) swap the HTTP client before `build()`.
-pub(crate) async fn build_remote_s3_config(
-    spec: &RemoteS3EndpointSpec,
-) -> Result<aws_sdk_s3::config::Builder, RemoteS3ClientError> {
+pub async fn build_remote_s3_config(spec: &RemoteS3EndpointSpec) -> Result<aws_sdk_s3::config::Builder, RemoteS3ClientError> {
    let Some(credentials) = &spec.credentials else {
        return Err(RemoteS3ClientError::MissingCredentials);
    };
@@ -523,7 +523,7 @@ fn validate_ca_pem_bundle(ca_cert_pem: &[u8]) -> Result<(), String> {
    Ok(())
 }

-pub(crate) fn validate_target_ca_pem(ca_cert_pem: &str) -> Result<(), RemoteS3ClientError> {
+pub fn validate_target_ca_pem(ca_cert_pem: &str) -> Result<(), RemoteS3ClientError> {
    validate_ca_pem_bundle(ca_cert_pem.as_bytes()).map_err(RemoteS3ClientError::InvalidCaPem)
 }

@@ -66,6 +66,7 @@ pub(crate) use replication_lifecycle_bridge::ReplicationLifecycleBridge;
 pub(crate) use replication_migration_bridge::ReplicationMigrationBridge;
 pub use replication_object_bridge::ReplicationObjectBridge;
 pub use replication_object_config::{DeleteReplicationConfigSnapshot, ReplicationConfig};
+pub(crate) use replication_object_decision_boundary::replication_etags_match;
 pub use replication_object_decision_boundary::{
    MustReplicateOptions, ReplicationDeleteScheduleInput, ReplicationDeleteStateSource, delete_replication_state_from_config,
    delete_replication_version_id, should_schedule_delete_replication, should_use_existing_delete_replication_info,
@@ -88,5 +89,6 @@ pub use replication_state::{ReplicationStats, RuntimeReplicationTargetBacklog};
 pub use replication_stats_boundary::{BucketReplicationStat, BucketReplicationStats, BucketStats, InQueueMetric, XferStats};
 pub use replication_storage_boundary::{ReplicationObjectIO, ReplicationStorage};
 pub use replication_target_boundary::SsecPassthroughCapability;
+pub use replication_target_boundary::VersionIdentityCapability;
 pub use replication_target_boundary::{ObjectLockIntegrity, object_lock_put_integrity};
 pub(crate) use replication_target_config_bridge::ReplicationTargetConfigBridge;
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

+#[cfg(test)]
+pub(crate) use rustfs_filemeta::ObjectPartInfo;
 pub use rustfs_replication::{MrfOpKind, MrfReplicateEntry};
 pub(crate) use rustfs_replication::{
    REPLICATE_EXISTING, REPLICATE_HEAL_DELETE, ReplicateTargetDecision, ReplicatedInfos, ReplicatedTargetInfo, ReplicationAction,
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

+#[cfg(test)]
+pub(crate) use rustfs_replication::ReplicationMultipartPlanError;
 pub use rustfs_replication::{
    MustReplicateOptions, ReplicationDeleteScheduleInput, ReplicationDeleteStateSource, delete_replication_state_from_config,
    delete_replication_version_id, should_schedule_delete_replication, should_use_existing_delete_replication_info,
@@ -20,9 +22,9 @@ pub use rustfs_replication::{
 pub(crate) use rustfs_replication::{
    ReplicationDeleteSource, ReplicationMultipartPartInput, ReplicationResyncTargetObject, delete_marker_purge_mrf_entry,
    delete_marker_purge_version_id, delete_replication_creates_marker, delete_replication_missing_source_decision,
-    delete_replication_object_opts, heal_uses_delete_replication_path, is_object_lock_denied_delete,
-    is_retryable_delete_replication_head_error, is_version_delete_replication, replicate_delete_outcome, replication_etags_match,
-    replication_multipart_complete_actual_size, replication_multipart_part_plan, replication_single_put_size_error,
-    resync_existing_delete_replication_info, resync_target_for_object, should_retry_delete_marker_purge,
-    single_part_replica_etag_mismatch, target_delete_version_id,
+    delete_replication_object_opts, delete_replication_target_version_id, heal_uses_delete_replication_path,
+    is_object_lock_denied_delete, is_retryable_delete_replication_head_error, is_version_delete_replication,
+    replicate_delete_outcome, replication_etags_match, replication_multipart_complete_actual_size,
+    replication_multipart_part_plan, replication_single_put_size_error, resync_existing_delete_replication_info,
+    resync_target_for_object, should_retry_delete_marker_purge, single_part_replica_etag_mismatch,
 };
@@ -75,6 +75,7 @@ use tracing::{debug, info, instrument, warn};
 const EVENT_REPLICATION_WORKER_RESIZE_SKIPPED: &str = "replication_worker_resize_skipped";
 const EVENT_REPLICATION_WORKER_RESIZED: &str = "replication_worker_resized";
 const EVENT_REPLICATION_BACKPRESSURE: &str = "replication_backpressure";
+const EVENT_REPLICATION_IN_FLIGHT_SKIPPED: &str = "replication_in_flight_skipped";
 const EVENT_REPLICATION_RESYNC_LOAD_SKIPPED: &str = "replication_resync_load_skipped";
 const EVENT_REPLICATION_RESYNC_RECOVERED: &str = "replication_resync_recovered";
 const EVENT_REPLICATION_MRF_QUEUE_UNAVAILABLE: &str = "replication_mrf_queue_unavailable";
@@ -882,6 +883,20 @@ fn reconstructed_heal_delete_info(
 ) -> DeletedObjectReplicationInfo {
    let mut rstate = oi.replication_state();
    rstate.replicate_decision_str = dsc.to_string();
+    // The caller hands us a blank ObjectInfo (the source marker may already be
+    // gone), so the state above carries no target-assigned marker version ids.
+    // Restore them from the journal: `delete_marker_purge_version_id` must hit
+    // the id the target reported, not fall back to the source marker id, which
+    // a target that mints its own ids answers with an idempotent 204 that would
+    // acknowledge the intent while the real marker stays behind (backlog#2290).
+    // The corrupt flag rides along so a refusal stays a refusal after restart.
+    for (arn, version_id) in &entry.target_delete_marker_version_ids {
+        rstate
+            .target_delete_marker_version_ids
+            .entry(arn.clone())
+            .or_insert_with(|| version_id.clone());
+    }
+    rstate.target_delete_marker_version_ids_corrupt |= entry.target_delete_marker_version_ids_corrupt;

    let delete_marker_mtime = entry
        .delete_marker_mtime
@@ -1075,6 +1090,9 @@ pub struct ReplicationPool<S: ReplicationStorage> {
    workers: RwLock<Vec<Sender<ReplicationOperation>>>,
    lrg_workers: RwLock<Vec<Sender<ReplicationOperation>>>,

+    /// Object versions queued or being replicated right now (backlog#2362).
+    in_flight: Arc<ReplicationInFlight>,
+
    // MRF (Most Recent Failures) channels
    mrf_replica_tx: Sender<ReplicationOperation>,
    // Shared among N MRF workers; Arc allows spawning more than one worker.
@@ -1133,6 +1151,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
            storage,
            workers: RwLock::new(Vec::new()),
            lrg_workers: RwLock::new(Vec::new()),
+            in_flight: Arc::new(ReplicationInFlight::default()),
            mrf_replica_tx,
            mrf_replica_rx: Arc::new(Mutex::new(mrf_replica_rx)),
            mrf_save_tx,
@@ -1188,12 +1207,13 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
            let active_counter = self.active_lrg_workers.clone();
            let storage = self.storage.clone();
            let stats = self.stats.clone();
+            let in_flight = self.in_flight.clone();

            let handle = tokio::spawn(async move {
                let mut rx = rx;
                while let Some(operation) = rx.recv().await {
                    let _active = ActiveWorkerGuard::new(active_counter.clone());
-                    process_replication_operation(operation, stats.clone(), storage.clone()).await;
+                    process_replication_operation(operation, stats.clone(), storage.clone(), in_flight.clone()).await;
                }
            });

@@ -1247,12 +1267,13 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
            let active_counter = self.active_workers.clone();
            let stats = self.stats.clone();
            let storage = self.storage.clone();
+            let in_flight = self.in_flight.clone();

            let handle = tokio::spawn(async move {
                let mut rx = rx;
                while let Some(operation) = rx.recv().await {
                    let _active = ActiveWorkerGuard::new(active_counter.clone());
-                    process_replication_operation(operation, stats.clone(), storage.clone()).await;
+                    process_replication_operation(operation, stats.clone(), storage.clone(), in_flight.clone()).await;
                }
            });

@@ -1291,6 +1312,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
            let active_counter = self.active_mrf_workers.clone();
            let stats = self.stats.clone();
            let storage = self.storage.clone();
+            let in_flight = self.in_flight.clone();
            let mrf_rx = Arc::clone(&self.mrf_replica_rx);

            let handle = tokio::spawn(async move {
@@ -1310,7 +1332,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
                    let Some(operation) = operation else { break };

                    let _active = ActiveWorkerGuard::new(active_counter.clone());
-                    process_replication_operation(operation, stats.clone(), storage.clone()).await;
+                    process_replication_operation(operation, stats.clone(), storage.clone(), in_flight.clone()).await;
                }
            });
            self.task_handles.lock().await.push(handle);
@@ -1440,6 +1462,24 @@ impl<S: ReplicationStorage> ReplicationPool<S> {

    /// Queues a replica task
    pub async fn queue_replica_task(&self, ri: ReplicateObjectInfo) -> ReplicationQueueAdmission {
+        // A version that is already queued or being uploaded is not driven a
+        // second time: the scanner heal pass sees it as PENDING until the
+        // first upload lands and would otherwise re-queue it every cycle
+        // (backlog#2362). The key is released when the worker finishes, or
+        // below when no worker accepts the task.
+        if !self.in_flight.try_begin(&ri) {
+            debug!(
+                event = EVENT_REPLICATION_IN_FLIGHT_SKIPPED,
+                component = LOG_COMPONENT_ECSTORE,
+                subsystem = LOG_SUBSYSTEM_REPLICATION,
+                bucket = %ri.bucket,
+                object = %ri.name,
+                version_id = ?ri.version_id,
+                op_type = ?ri.op_type,
+                "Replication task already in flight; not queued again"
+            );
+            return ReplicationQueueAdmission::Skipped;
+        }
        let target_arns = ri.dsc.replicate_target_arns();
        // If object is large, queue it to a static set of large workers
        if should_queue_large_object(ri.size) {
@@ -1470,7 +1510,9 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
                    let resize = large_worker_backpressure_resize(existing, self.active_lrg_workers(), max_l_workers);
                    drop(lrg_workers);

-                    // Queue to MRF if worker is busy.
+                    // Queue to MRF if worker is busy. The MRF replay re-enters
+                    // this function, so the version is no longer in flight.
+                    self.in_flight.finish(&ri);
                    let admission = self.queue_mrf_save_admission(ri.to_mrf_entry(), "large_object").await;

                    if let Some(resize) = resize {
@@ -1479,6 +1521,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
                    return admission;
                }
            }
+            self.in_flight.finish(&ri);
            return ReplicationQueueAdmission::Missed;
        }

@@ -1487,6 +1530,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
        let ch = self.worker_queue_channel(&ri.op_type, &ri.bucket, &ri.name, ri.size).await;

        let Some(channel) = ch else {
+            self.in_flight.finish(&ri);
            return ReplicationQueueAdmission::Missed;
        };

@@ -1498,7 +1542,9 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
        self.stats.dec_q(&ri.bucket, ri.size, ri.delete_marker, ri.op_type);
        self.stats.dec_target_q(&ri.bucket, &target_arns, ri.size);

-        // Queue to MRF if all workers are busy.
+        // Queue to MRF if all workers are busy. The MRF replay re-enters this
+        // function, so the version is no longer in flight.
+        self.in_flight.finish(&ri);
        let admission = self.queue_mrf_save_admission(ri.to_mrf_entry(), "object").await;

        // Try to scale up workers based on priority
@@ -1797,7 +1843,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
    ) {
        while let Some(operation) = rx.recv().await {
            let _active = ActiveWorkerGuard::new(active_counter.clone());
-            process_replication_operation(operation, stats.clone(), self.storage.clone()).await;
+            process_replication_operation(operation, stats.clone(), self.storage.clone(), self.in_flight.clone()).await;
        }
    }

@@ -1815,7 +1861,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
    ) {
        while let Some(operation) = rx.recv().await {
            let _active = ActiveWorkerGuard::new(active_counter.clone());
-            process_replication_operation(operation, stats.clone(), storage.clone()).await;
+            process_replication_operation(operation, stats.clone(), storage.clone(), self.in_flight.clone()).await;
        }
    }

@@ -1832,7 +1878,7 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
    ) {
        while let Some(operation) = rx.recv().await {
            let _active = ActiveWorkerGuard::new(active_counter.clone());
-            process_replication_operation(operation, stats.clone(), self.storage.clone()).await;
+            process_replication_operation(operation, stats.clone(), self.storage.clone(), self.in_flight.clone()).await;
        }
    }

@@ -2267,6 +2313,64 @@ impl<S: ReplicationStorage> ReplicationPool<S> {
    }
 }

+/// Object versions currently queued or being uploaded, keyed by bucket,
+/// object name and version. `queue_replica_task` admits a version only once
+/// while it is in flight; the scanner heal pass and MRF replays that arrive
+/// in the meantime are `Skipped` instead of driving a second complete upload
+/// (backlog#2362). Entries are removed when the worker finishes the task or
+/// when no worker accepted it.
+#[derive(Debug, Default)]
+pub(crate) struct ReplicationInFlight {
+    keys: std::sync::Mutex<std::collections::HashSet<(String, String, Option<uuid::Uuid>)>>,
+}
+
+impl ReplicationInFlight {
+    fn lock(&self) -> std::sync::MutexGuard<'_, std::collections::HashSet<(String, String, Option<uuid::Uuid>)>> {
+        self.keys.lock().unwrap_or_else(|poisoned| poisoned.into_inner())
+    }
+
+    /// Claim `ri`; `false` when the same version is already in flight.
+    fn try_begin(&self, ri: &ReplicateObjectInfo) -> bool {
+        self.lock().insert((ri.bucket.clone(), ri.name.clone(), ri.version_id))
+    }
+
+    fn finish(&self, ri: &ReplicateObjectInfo) {
+        self.lock().remove(&(ri.bucket.clone(), ri.name.clone(), ri.version_id));
+    }
+
+    #[cfg(test)]
+    fn len(&self) -> usize {
+        self.lock().len()
+    }
+}
+
+/// Releases the in-flight claim when the worker is done with the task,
+/// including when replication panics.
+struct ReplicationInFlightGuard {
+    in_flight: Arc<ReplicationInFlight>,
+    key: ReplicateObjectInfo,
+}
+
+impl ReplicationInFlightGuard {
+    fn new(in_flight: Arc<ReplicationInFlight>, ri: &ReplicateObjectInfo) -> Self {
+        Self {
+            in_flight,
+            key: ReplicateObjectInfo {
+                bucket: ri.bucket.clone(),
+                name: ri.name.clone(),
+                version_id: ri.version_id,
+                ..Default::default()
+            },
+        }
+    }
+}
+
+impl Drop for ReplicationInFlightGuard {
+    fn drop(&mut self) {
+        self.in_flight.finish(&self.key);
+    }
+}
+
 struct ActiveWorkerGuard {
    counter: Arc<AtomicI32>,
 }
@@ -2328,10 +2432,12 @@ async fn process_replication_operation<S: ReplicationStorage>(
    operation: ReplicationOperation,
    stats: Arc<ReplicationStats>,
    storage: Arc<S>,
+    in_flight: Arc<ReplicationInFlight>,
 ) {
    match operation {
        ReplicationOperation::Object(obj_info) => {
            let _backlog = ReplicationBacklogGuard::for_object(stats, obj_info.as_ref());
+            let _in_flight = ReplicationInFlightGuard::new(in_flight, obj_info.as_ref());
            replicate_object(*obj_info, storage).await;
        }
        ReplicationOperation::Delete(del_info) => {
@@ -3065,7 +3171,11 @@ pub async fn queue_replication_heal(bucket: &str, oi: ObjectInfo, retry_count: u
    }

    let rcfg = match ReplicationMetadataStore::optional_replication_config(bucket).await {
-        Ok(Some(config)) => config,
+        Ok(Some(config)) => Some(config),
+        // A bucket without a configuration still owes its pending purges an
+        // answer: the delete worker finishes them locally as abandoned, which
+        // is what makes the bucket deletable again (rustfs/backlog#2340).
+        Ok(None) if owes_version_purge(&oi) => None,
        Ok(None) => return ReplicationQueueAdmission::Skipped,
        Err(err) => {
            debug!(
@@ -3115,7 +3225,7 @@ pub async fn queue_replication_heal(bucket: &str, oi: ObjectInfo, retry_count: u
        }
    };

-    let rcfg_wrapper = ReplicationConfig::new(Some(rcfg), tgts);
+    let rcfg_wrapper = ReplicationConfig::new(rcfg, tgts);
    queue_replication_heal_internal(bucket, oi, rcfg_wrapper, retry_count)
        .await
        .admission
@@ -3143,6 +3253,17 @@ pub async fn queue_replication_metadata(bucket: &str, oi: ObjectInfo, retry_coun
    }
 }

+/// A version purge the persisted state still owes to named targets. Without
+/// the target list nothing can be settled, so such a version keeps the
+/// ordinary "no configuration, nothing to heal" skip.
+fn owes_version_purge(oi: &ObjectInfo) -> bool {
+    !oi.version_purge_status.is_empty()
+        && oi
+            .version_purge_status_internal
+            .as_deref()
+            .is_some_and(|statuses| !statuses.trim().is_empty())
+}
+
 /// queue_replication_heal_internal enqueues objects that failed replication OR eligible for resyncing through
 /// an ongoing resync operation or via existing objects replication configuration setting.
 pub(crate) async fn queue_replication_heal_internal(
@@ -3161,7 +3282,11 @@ pub(crate) async fn queue_replication_heal_internal(
        };
    }

-    if rcfg.config.is_none() || rcfg.remotes.is_none() {
+    // Without a configuration or targets there is nothing to replicate —
+    // except a version purge the bucket still owes: its stored decision names
+    // the targets, and the delete worker settles the ones no longer
+    // configured as abandoned (rustfs/backlog#2340).
+    if (rcfg.config.is_none() || rcfg.remotes.is_none()) && !owes_version_purge(&oi) {
        return ReplicationHealQueueResult {
            object_info: roi,
            admission: ReplicationQueueAdmission::Skipped,
@@ -3206,12 +3331,15 @@ pub(crate) async fn queue_replication_heal_internal(
        }
        ReplicationHealQueueAction::QueueDelete(dv) => {
            // A purge the peer denied under object lock cannot succeed until
-            // the lock lapses (#6850); requeuing it every heal cycle only
+            // the lock lapses (#6850), and one whose replica cannot be told
+            // apart on a target that mints its own version ids cannot
+            // succeed until the ledger or an operator resolves it
+            // (rustfs/backlog#2340); requeuing either every heal cycle only
            // burns bandwidth and failure counters. The backoff expires on
            // its own, so the purge is probed again — and converges — once
-            // the retention window has a chance of being over.
+            // the condition has a chance of being over.
            if super::replication_object_decision_boundary::is_version_delete_replication(&dv.delete_object)
-                && super::replication_resyncer::object_lock_denied_purge_backoff_active(&dv)
+                && super::replication_resyncer::purge_backoff_active(&dv)
            {
                return ReplicationHealQueueResult {
                    object_info: roi,
@@ -3693,6 +3821,7 @@ mod tests {
            stats: Arc::new(ReplicationStats::new()),
            workers: RwLock::new(Vec::new()),
            lrg_workers: RwLock::new(Vec::new()),
+            in_flight: Arc::new(ReplicationInFlight::default()),
            mrf_replica_tx,
            mrf_replica_rx: Arc::new(Mutex::new(mrf_replica_rx)),
            mrf_save_tx,
@@ -3759,6 +3888,90 @@ mod tests {
        assert_eq!(current_queue(&pool, "admission-bucket").await, (1, 4096));
    }

+    #[tokio::test]
+    async fn queue_replica_task_admits_a_version_once_while_it_is_in_flight() {
+        let pool = new_test_replication_pool(Arc::new(LoadResyncNodeStore::new("node-a", empty_resync_shared_state()))).await;
+        let (tx, _rx) = mpsc::channel(4);
+        pool.workers.write().await.push(tx);
+        let ri = ReplicateObjectInfo {
+            bucket: "in-flight-bucket".to_string(),
+            name: "object".to_string(),
+            version_id: Some(uuid::Uuid::new_v4()),
+            size: 4096,
+            op_type: ReplicationType::Object,
+            ..Default::default()
+        };
+
+        assert_eq!(pool.queue_replica_task(ri.clone()).await, ReplicationQueueAdmission::Queued);
+        // backlog#2362: the scanner heal pass sees the version as PENDING
+        // until the worker lands it; a second request must not drive it again.
+        assert_eq!(pool.queue_replica_task(ri.clone()).await, ReplicationQueueAdmission::Skipped);
+        assert_eq!(current_queue(&pool, "in-flight-bucket").await, (1, 4096));
+
+        // Another version of the same key is independent work.
+        let newer = ReplicateObjectInfo {
+            version_id: Some(uuid::Uuid::new_v4()),
+            ..ri.clone()
+        };
+        assert_eq!(pool.queue_replica_task(newer).await, ReplicationQueueAdmission::Queued);
+        assert_eq!(pool.in_flight.len(), 2);
+
+        // Once the worker finishes, the same version may be queued again
+        // (for example after a FAILED status).
+        pool.in_flight.finish(&ri);
+        assert_eq!(pool.queue_replica_task(ri).await, ReplicationQueueAdmission::Queued);
+        assert_eq!(current_queue(&pool, "in-flight-bucket").await, (3, 3 * 4096));
+    }
+
+    #[tokio::test]
+    async fn queue_replica_task_releases_the_version_when_no_worker_accepts_it() {
+        let pool = new_test_replication_pool(Arc::new(LoadResyncNodeStore::new("node-a", empty_resync_shared_state()))).await;
+        let ri = ReplicateObjectInfo {
+            bucket: "no-worker-bucket".to_string(),
+            name: "object".to_string(),
+            version_id: Some(uuid::Uuid::new_v4()),
+            size: 4096,
+            op_type: ReplicationType::Object,
+            ..Default::default()
+        };
+
+        // No worker channel: the task is missed and must not stay claimed.
+        assert_eq!(pool.queue_replica_task(ri.clone()).await, ReplicationQueueAdmission::Missed);
+        assert_eq!(pool.in_flight.len(), 0);
+        assert_eq!(pool.queue_replica_task(ri.clone()).await, ReplicationQueueAdmission::Missed);
+
+        // A full worker channel hands the task to the MRF save path; the MRF
+        // replay re-enters the queue, so the claim is released here too.
+        let (tx, _rx) = mpsc::channel(1);
+        pool.workers.write().await.push(tx);
+        assert_eq!(pool.queue_replica_task(ri.clone()).await, ReplicationQueueAdmission::Queued);
+        let overflow = ReplicateObjectInfo {
+            version_id: Some(uuid::Uuid::new_v4()),
+            ..ri
+        };
+        assert_eq!(pool.queue_replica_task(overflow).await, ReplicationQueueAdmission::Queued);
+        assert_eq!(pool.in_flight.len(), 1, "only the version held by the worker channel stays in flight");
+    }
+
+    #[test]
+    fn in_flight_guard_releases_the_version_on_drop() {
+        let in_flight = Arc::new(ReplicationInFlight::default());
+        let ri = ReplicateObjectInfo {
+            bucket: "guard-bucket".to_string(),
+            name: "object".to_string(),
+            version_id: Some(uuid::Uuid::new_v4()),
+            ..Default::default()
+        };
+        assert!(in_flight.try_begin(&ri));
+        assert!(!in_flight.try_begin(&ri));
+        {
+            let _guard = ReplicationInFlightGuard::new(in_flight.clone(), &ri);
+            assert_eq!(in_flight.len(), 1);
+        }
+        assert_eq!(in_flight.len(), 0);
+        assert!(in_flight.try_begin(&ri));
+    }
+
    #[tokio::test]
    async fn regular_worker_admission_counts_target_backlog_before_receive() {
        let pool = new_test_replication_pool(Arc::new(LoadResyncNodeStore::new("node-a", empty_resync_shared_state()))).await;
@@ -6601,4 +6814,87 @@ mod tests {
            replacement_data
        );
    }
+
+    /// backlog#2290: a delete-marker purge intent that survives a restart
+    /// through the MRF journal addresses the marker version the TARGET
+    /// assigned, exactly as the live watcher does (see the
+    /// `requires_delayed_purge` spawn). The journal carries the per-ARN ids
+    /// (`targetDeleteMarkerVersionIDs`) and replay restores them into the
+    /// reconstructed replication state; without that the replay would fall
+    /// back to the source marker id, which a target that mints its own ids
+    /// answers with an idempotent 204 — the entry would be acknowledged while
+    /// the real marker stayed behind.
+    #[test]
+    fn mrf_delete_marker_purge_replay_preserves_target_assigned_marker_version() {
+        use super::super::replication_object_decision_boundary::{delete_marker_purge_mrf_entry, delete_marker_purge_version_id};
+
+        let arn = "arn:minio:replication::generic-target:photos".to_string();
+        let source_marker = uuid::Uuid::new_v4();
+        let remote_marker = "remote-assigned-marker-version".to_string();
+
+        let live_oi = ObjectInfo {
+            bucket: "photos".to_string(),
+            name: "obj".to_string(),
+            version_id: Some(source_marker),
+            delete_marker: true,
+            ..Default::default()
+        };
+        let mut live_state = live_oi.replication_state();
+        live_state.replicate_decision_str = replicate_decision_for_admitted_targets(std::slice::from_ref(&arn)).to_string();
+        live_state
+            .target_delete_marker_version_ids
+            .insert(arn.clone(), remote_marker.clone());
+        let live = DeletedObjectReplicationInfo {
+            delete_object: ReplicationDeletedObject {
+                object_name: "obj".to_string(),
+                delete_marker: true,
+                delete_marker_version_id: Some(source_marker),
+                replication_state: Some(live_state),
+                ..Default::default()
+            },
+            bucket: "photos".to_string(),
+            ..Default::default()
+        };
+        assert_eq!(
+            delete_marker_purge_version_id(live.delete_object.replication_state.as_ref(), &arn, source_marker),
+            Some(Some(remote_marker.clone())),
+            "the live purge addresses the recorded target version"
+        );
+
+        // Watch window exhausted: persist the intent, restart, replay it.
+        let entry = delete_marker_purge_mrf_entry(&live, vec![arn.clone()]);
+        let replay_oi = ObjectInfo {
+            bucket: entry.bucket.clone(),
+            name: entry.object.clone(),
+            version_id: entry.version_id,
+            delete_marker: entry.delete_marker,
+            ..Default::default()
+        };
+        let dsc = replicate_decision_for_admitted_targets(&entry.target_arns);
+        let replayed = reconstructed_heal_delete_info(&entry, &replay_oi, &dsc);
+
+        assert_eq!(
+            delete_marker_purge_version_id(replayed.delete_object.replication_state.as_ref(), &arn, source_marker),
+            Some(Some(remote_marker)),
+            "the MRF replay must address the target-assigned marker version, not source marker {source_marker}"
+        );
+
+        // A refusal (inconsistent recorded ids) must stay a refusal across the
+        // journal round trip instead of degrading into the source-id fallback.
+        let mut refused = live;
+        refused
+            .delete_object
+            .replication_state
+            .as_mut()
+            .expect("state was set above")
+            .target_delete_marker_version_ids_corrupt = true;
+        let entry = delete_marker_purge_mrf_entry(&refused, vec![arn.clone()]);
+        assert!(entry.target_delete_marker_version_ids_corrupt);
+        let replayed = reconstructed_heal_delete_info(&entry, &replay_oi, &dsc);
+        assert_eq!(
+            delete_marker_purge_version_id(replayed.delete_object.replication_state.as_ref(), &arn, source_marker),
+            None,
+            "the MRF replay must keep refusing to guess when the recorded ids were inconsistent"
+        );
+    }
 }
@@ -38,7 +38,7 @@ use time::format_description::well_known::Rfc3339;

 pub(crate) use crate::bucket::bucket_target_sys::{
    AdvancedPutOptions, HeadObjectSdkError, PutObjectOptions, PutObjectPartOptions, RemotePutObjectResponse, RemoveObjectOptions,
-    S3ClientError, TargetClient, resolve_read_api_version_id,
+    ReplicaLocation, S3ClientError, TargetClient, resolve_read_api_version_id,
 };
 #[cfg(test)]
 pub(crate) use crate::bucket::target::BucketTarget;
@@ -48,6 +48,7 @@ pub use rustfs_replication::{ObjectLockIntegrity, object_lock_put_integrity};
 pub(crate) use rustfs_replication::{
    SsecPassthroughGate, is_replication_target_offline_error, ssec_passthrough_gate, version_identity_drifted,
 };
+pub use rustfs_replication::{VersionIdentityCapability, version_identity_capability_from_put};

 use super::replication_config_store::ReplicationConfigStore;
 use super::replication_error_boundary::{Error, Result};
@@ -192,6 +193,14 @@ impl ReplicationTargetStore {
            .await
    }

+    pub(crate) fn version_identity_capability(arn: &str) -> VersionIdentityCapability {
+        BucketTargetSys::get().version_identity_capability(arn)
+    }
+
+    pub(crate) fn record_version_identity_capability(arn: &str, capability: VersionIdentityCapability) {
+        BucketTargetSys::get().record_version_identity_capability(arn, capability)
+    }
+
    #[cfg(test)]
    pub(crate) async fn register_test_target(target_client: &Arc<TargetClient>) {
        BucketTargetSys::get().arn_remotes_map.write().await.insert(
@@ -238,6 +247,23 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
        meta.insert(key.to_string(), value.to_string());
    }

+    // A compressed SSE-C object passes through as its stored bytes. The target
+    // cannot infer the compression layout from ciphertext, so the scheme and
+    // the plaintext size travel as transport headers; each UploadPart carries
+    // its own plaintext length (backlog#2363).
+    if is_ssec && let Some(scheme) = get_str(&object_info.user_defined, rustfs_utils::http::SUFFIX_COMPRESSION) {
+        insert_header_map(&mut meta, rustfs_utils::http::SUFFIX_REPLICATION_COMPRESSION, scheme);
+        if let Ok(actual_size) = object_info.get_actual_size()
+            && actual_size >= 0
+        {
+            insert_header_map(
+                &mut meta,
+                rustfs_utils::http::SUFFIX_REPLICATION_COMPRESSION_ACTUAL_SIZE,
+                actual_size.to_string(),
+            );
+        }
+    }
+
    // Managed SSE replicates as plaintext (the replication reader decrypts via
    // the object-encryption resolver) and re-encrypts on the target with the
    // target's own KMS. Send only the encryption intent — never the source
@@ -248,7 +274,16 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
        meta.insert(AMZ_SERVER_SIDE_ENCRYPTION.to_string(), "aws:kms".to_string());
    }

-    let mut is_multipart = object_info.is_multipart();
+    // Older transformed objects can have physical parts without logical part
+    // lengths. Keep their existing whole-object transport: physical sizes are
+    // not plaintext boundaries for a multipart replication read.
+    let legacy_single_put = object_info.etag.as_deref().is_none_or(|etag| etag.len() == 32);
+    let base_is_multipart = object_info.is_multipart()
+        && !(legacy_single_put
+            && object_info.parts.len() > 1
+            && (object_info.is_compressed() || object_info.is_encrypted())
+            && object_info.parts.iter().any(|part| part.actual_size <= 0));
+    let mut is_multipart = base_is_multipart;

    if let Some(checksum_data) = &object_info.checksum
        && !checksum_data.is_empty()
@@ -259,8 +294,8 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
        } else if object_info.is_encrypted() {
            // Encrypted checksums cannot be exposed as plaintext headers, and
            // decrypt_checksums reports is_multipart=false for them (a value
-            // the response path relies on). Keep the object's own multipart
-            // flag so encrypted objects stay on the multipart route.
+            // the response path relies on). Keep the transport selected from
+            // the object's layout and readable part boundaries.
        } else {
            let (checksum_meta, checksum_record_is_multipart) = object_info.decrypt_checksums(0, &HeaderMap::new())?;
            // The checksum record describes how the *checksum* is composed,
@@ -268,23 +303,37 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
            // MULTIPART flag even on a multipart upload, so trusting it here
            // routed a 768-part object through a single PutObject and the
            // target rejected the 6 GiB body with EntityTooLarge
-            // (rustfs#6825). The object's own shape is the authority: the
+            // (rustfs#6825). The usable part layout is the authority: the
            // record may only add multipart-ness, never take it away.
-            is_multipart = object_info.is_multipart() || checksum_record_is_multipart;
+            is_multipart = base_is_multipart || checksum_record_is_multipart;

-            for (key, value) in checksum_meta.iter() {
-                if key != AMZ_CHECKSUM_TYPE {
-                    meta.insert(key.clone(), value.clone());
-                }
-            }
-
-            if !object_info.is_multipart()
+            if !base_is_multipart
                && checksum_meta
                    .get(AMZ_CHECKSUM_TYPE)
                    .is_some_and(|value| value == AMZ_CHECKSUM_TYPE_FULL_OBJECT)
            {
                is_multipart = false;
            }
+
+            // The record keys each checksum by algorithm name ("CRC32"); the
+            // target only reads `x-amz-checksum-<algorithm>`. Inserting the bare
+            // name here made `PutObjectOptions::header()` send it as user
+            // metadata (`x-amz-meta-crc32`), so no replica ever carried the
+            // source checksum (rustfs/backlog#2340). The object-level record
+            // describes one PUT body: a multipart replica is rebuilt part by
+            // part, and its CreateMultipartUpload must not announce a checksum
+            // the parts do not carry, so the record is forwarded on the
+            // single-PUT route only (MinIO `getCRCMeta` parity).
+            if !is_multipart {
+                for (key, value) in checksum_meta.iter() {
+                    if key == AMZ_CHECKSUM_TYPE {
+                        continue;
+                    }
+                    if let Some(header) = rustfs_rio::ChecksumType::from_string(key).key() {
+                        meta.insert(header.to_string(), value.clone());
+                    }
+                }
+            }
        }
    }

@@ -516,6 +565,7 @@ fn is_standard_header(key: &str) -> bool {

 #[cfg(test)]
 mod tests {
+    use super::super::replication_filemeta_boundary::ObjectPartInfo;
    use super::*;
    use aws_smithy_types::DateTime;
    use rustfs_replication::content_matches_by_etag;
@@ -550,6 +600,162 @@ mod tests {
        checksum.to_bytes(&combined)
    }

+    fn replication_route_metadata() -> [(&'static str, Arc<HashMap<String, String>>); 4] {
+        let mut compressed = HashMap::new();
+        rustfs_utils::http::insert_str(&mut compressed, rustfs_utils::http::SUFFIX_COMPRESSION, "zstd".to_string());
+        [
+            ("plain", Arc::new(HashMap::new())),
+            ("compressed", Arc::new(compressed)),
+            (
+                "encrypted",
+                Arc::new(HashMap::from([(AMZ_SERVER_SIDE_ENCRYPTION.to_string(), "AES256".to_string())])),
+            ),
+            (
+                "ssec",
+                Arc::new(HashMap::from([(SSEC_ALGORITHM_HEADER.to_string(), "AES256".to_string())])),
+            ),
+        ]
+    }
+
+    fn replication_route_object(
+        etag: Option<&str>,
+        actual_sizes: [i64; 3],
+        metadata: Arc<HashMap<String, String>>,
+    ) -> ObjectInfo {
+        ObjectInfo {
+            etag: etag.map(str::to_string),
+            size: 48,
+            actual_size: 12,
+            user_defined: metadata,
+            parts: Arc::new(
+                actual_sizes
+                    .into_iter()
+                    .enumerate()
+                    .map(|(index, actual_size)| ObjectPartInfo {
+                        number: index + 1,
+                        size: 16,
+                        actual_size,
+                        ..Default::default()
+                    })
+                    .collect(),
+            ),
+            ..Default::default()
+        }
+    }
+
+    #[test]
+    fn compressed_ssec_objects_declare_their_compression_layout_on_the_wire() {
+        use rustfs_utils::http::{
+            SUFFIX_ACTUAL_SIZE, SUFFIX_COMPRESSION, SUFFIX_REPLICATION_COMPRESSION, SUFFIX_REPLICATION_COMPRESSION_ACTUAL_SIZE,
+            insert_str,
+        };
+
+        let mut ssec_compressed = HashMap::from([(SSEC_ALGORITHM_HEADER.to_string(), "AES256".to_string())]);
+        insert_str(&mut ssec_compressed, SUFFIX_COMPRESSION, "klauspost/compress/s2".to_string());
+        insert_str(&mut ssec_compressed, SUFFIX_ACTUAL_SIZE, "6295552".to_string());
+        let object_info = ObjectInfo {
+            etag: Some("0123456789abcdef0123456789abcdef-2".to_string()),
+            size: 4321,
+            actual_size: 6295552,
+            user_defined: Arc::new(ssec_compressed),
+            ..Default::default()
+        };
+
+        // SSE-C passthrough sends stored bytes: the scheme and the plaintext
+        // size travel as transport headers, never as the internal key
+        // (backlog#2363).
+        let (options, _) = replication_put_object_options("STANDARD", &object_info).expect("ssec put options");
+        assert_eq!(
+            get_header_map(&options.user_metadata, SUFFIX_REPLICATION_COMPRESSION).as_deref(),
+            Some("klauspost/compress/s2")
+        );
+        assert_eq!(
+            get_header_map(&options.user_metadata, SUFFIX_REPLICATION_COMPRESSION_ACTUAL_SIZE).as_deref(),
+            Some("6295552")
+        );
+        assert!(
+            !options
+                .user_metadata
+                .keys()
+                .any(|key| rustfs_utils::http::is_internal_key(key)),
+            "internal metadata never leaves the source as plain metadata: {:?}",
+            options.user_metadata
+        );
+
+        // A compressed object that is not SSE-C is decompressed by the
+        // replication reader and travels as plaintext: no layout headers.
+        let mut plain_compressed = HashMap::new();
+        insert_str(&mut plain_compressed, SUFFIX_COMPRESSION, "klauspost/compress/s2".to_string());
+        insert_str(&mut plain_compressed, SUFFIX_ACTUAL_SIZE, "6295552".to_string());
+        let plain = ObjectInfo {
+            user_defined: Arc::new(plain_compressed),
+            ..object_info
+        };
+        let (options, _) = replication_put_object_options("STANDARD", &plain).expect("plain put options");
+        assert!(get_header_map(&options.user_metadata, SUFFIX_REPLICATION_COMPRESSION).is_none());
+        assert!(get_header_map(&options.user_metadata, SUFFIX_REPLICATION_COMPRESSION_ACTUAL_SIZE).is_none());
+    }
+
+    #[test]
+    fn legacy_transformed_single_put_parts_keep_the_previous_replication_route() {
+        let [_, (_, compressed), (_, encrypted), (_, ssec)] = replication_route_metadata();
+        let cases = [
+            (
+                "compressed middle zero",
+                compressed.clone(),
+                Some("0123456789abcdef0123456789abcdef"),
+                [4, 0, 4],
+            ),
+            ("compressed tail unknown", compressed, None, [4, 4, -1]),
+            (
+                "encrypted middle unknown",
+                encrypted,
+                Some("gggggggggggggggggggggggggggggggg"),
+                [4, -1, 4],
+            ),
+            ("ssec tail zero", ssec.clone(), None, [4, 4, 0]),
+            ("ssec middle unknown", ssec, Some("gggggggggggggggggggggggggggggggg"), [4, -1, 4]),
+        ];
+        for (name, metadata, etag, actual_sizes) in cases {
+            for checksum in [None, Some(full_object_multipart_checksum_record())] {
+                let mut object_info = replication_route_object(etag, actual_sizes, metadata.clone());
+                object_info.checksum = checksum;
+                assert!(object_info.is_multipart(), "{name}: physical parts remain visible to metadata APIs");
+                assert!(object_info.is_compressed() || object_info.is_encrypted());
+
+                let (options, is_multipart) =
+                    replication_put_object_options("STANDARD", &object_info).expect("legacy transformed put options");
+                assert!(
+                    !is_multipart,
+                    "{name}: unknown logical part sizes must preserve the old whole-object route"
+                );
+                assert_eq!(options.internal.source_etag, etag.unwrap_or_default());
+                if metadata.contains_key(SSEC_ALGORITHM_HEADER) {
+                    assert_eq!(
+                        get_header_map(&options.user_metadata, SUFFIX_REPLICATION_SSEC_CRC).is_some(),
+                        object_info.checksum.is_some(),
+                        "SSE-C checksums retain their raw passthrough transport"
+                    );
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn positive_part_sizes_and_legacy_multipart_etags_keep_the_replication_route() {
+        for (name, metadata) in replication_route_metadata() {
+            for (etag, actual_sizes) in [
+                ("0123456789abcdef0123456789abcdef", [4, 4, 4]),
+                ("0123456789abcdef0123456789abcdef-3", [4, 0, -1]),
+            ] {
+                let mut object_info = replication_route_object(Some(etag), actual_sizes, metadata.clone());
+                object_info.checksum = Some(full_object_multipart_checksum_record());
+                let (_, is_multipart) = replication_put_object_options("STANDARD", &object_info).expect("multipart put options");
+                assert!(is_multipart, "{name}/{etag}: usable sizes and old multipart ETags must retain MPU");
+            }
+        }
+    }
+
    #[test]
    fn multipart_object_with_full_object_checksum_keeps_the_multipart_route() {
        // rustfs#6825: a 768-part upload was replicated with a single
@@ -582,6 +788,36 @@ mod tests {
        );
    }

+    #[test]
+    fn stored_multipart_parts_keep_the_replication_route_without_a_multipart_etag() {
+        for etag in [Some("0123456789abcdef0123456789abcdef"), None] {
+            for checksum in [None, Some(full_object_multipart_checksum_record())] {
+                let object_info = ObjectInfo {
+                    etag: etag.map(str::to_string),
+                    checksum,
+                    parts: Arc::new(
+                        (1..=2)
+                            .map(|number| ObjectPartInfo {
+                                number,
+                                ..Default::default()
+                            })
+                            .collect(),
+                    ),
+                    ..Default::default()
+                };
+                let (options, is_multipart) =
+                    replication_put_object_options("STANDARD", &object_info).expect("build put options");
+
+                assert!(
+                    is_multipart,
+                    "stored parts must retain multipart routing: etag={etag:?}, checksum={:?}",
+                    object_info.checksum
+                );
+                assert_eq!(options.internal.source_etag, etag.unwrap_or_default());
+            }
+        }
+    }
+
    #[test]
    fn checksum_record_never_changes_the_transport_a_single_part_object_needs() {
        // The mirror of the rustfs#6825 guard: an object stored as one PUT
@@ -592,6 +828,10 @@ mod tests {
        let object_info = ObjectInfo {
            etag: Some("0123456789abcdef0123456789abcdef".to_string()),
            checksum: Some(checksum.to_bytes(&[])),
+            parts: Arc::new(vec![ObjectPartInfo {
+                number: 1,
+                ..Default::default()
+            }]),
            ..Default::default()
        };

@@ -628,6 +868,19 @@ mod tests {
        let (_, is_multipart) = replication_put_object_options("STANDARD", &object_info).expect("build put options");

        assert!(is_multipart, "a composite-checksum multipart object must stay on the multipart transport");
+
+        for (name, metadata) in replication_route_metadata() {
+            let mut legacy = replication_route_object(Some("0123456789abcdef0123456789abcdef"), [4, 0, 4], metadata);
+            legacy.checksum = Some(checksum.to_bytes(&combined));
+            let (_, record_is_multipart) = legacy.decrypt_checksums(0, &HeaderMap::new()).expect("decode checksum");
+            let (_, is_multipart) = replication_put_object_options("STANDARD", &legacy).expect("legacy checksum put options");
+            if legacy.is_encrypted() {
+                assert!(!is_multipart, "{name}: encrypted checksum records must not change the old transport");
+            } else {
+                assert!(record_is_multipart, "the composite checksum must carry its own multipart signal");
+                assert!(is_multipart, "{name}: a composite record can still promote the legacy route to MPU");
+            }
+        }
    }

    #[test]
@@ -1308,12 +1561,63 @@ mod tests {
                ..Default::default()
            };

-            let (opts, _is_multipart) = replication_put_object_options("", &object_info).expect("build replication put options");
+            let (opts, is_multipart) = replication_put_object_options("", &object_info).expect("build replication put options");

+            assert!(!is_multipart, "{name}: a single-part checksum record must keep the single-PUT route");
+            let header = ty.key().expect("every forwarded algorithm has an x-amz-checksum header");
            assert_eq!(
-                opts.user_metadata.get(name),
+                opts.user_metadata.get(header),
                Some(&checksum.encoded),
-                "replication must forward the {name} checksum into user_metadata identically to the classic algorithms"
+                "replication must forward the {name} checksum as the {header} header"
+            );
+            assert!(
+                !opts.user_metadata.contains_key(name),
+                "{name}: the bare algorithm name would leave as x-amz-meta user metadata"
+            );
+        }
+    }
+
+    /// The object-level record of a multipart upload (composite or full-object)
+    /// must not become a PutObject checksum header: the replica is rebuilt
+    /// through CreateMultipartUpload/UploadPart, and a checksum announced there
+    /// that the parts do not carry would be rejected by the target.
+    #[test]
+    fn replication_put_object_options_keeps_multipart_checksum_records_off_the_wire() {
+        let mut composite_type = rustfs_rio::ChecksumType::from_string("crc32");
+        composite_type
+            .merge(rustfs_rio::ChecksumType::MULTIPART)
+            .merge(rustfs_rio::ChecksumType::INCLUDES_MULTIPART);
+        let mut combined = Vec::new();
+        for part in [b"part-one".as_slice(), b"part-two".as_slice()] {
+            let part_checksum =
+                rustfs_rio::Checksum::new_from_data(rustfs_rio::ChecksumType::from_string("crc32"), part).expect("part checksum");
+            combined.extend_from_slice(part_checksum.raw.as_slice());
+        }
+        let composite = rustfs_rio::Checksum::new_from_data(composite_type, &combined)
+            .expect("composite checksum")
+            .to_bytes(&combined);
+
+        for (label, checksum, etag) in [
+            ("composite", composite, "0123456789abcdef0123456789abcdef-2"),
+            (
+                "full-object",
+                full_object_multipart_checksum_record(),
+                "0123456789abcdef0123456789abcdef-3",
+            ),
+        ] {
+            let object_info = ObjectInfo {
+                etag: Some(etag.to_string()),
+                checksum: Some(checksum),
+                ..Default::default()
+            };
+            let (opts, is_multipart) = replication_put_object_options("", &object_info).expect("build replication put options");
+            assert!(is_multipart, "{label}: a multipart object must keep the multipart route");
+            assert!(
+                opts.user_metadata
+                    .keys()
+                    .all(|key| !key.starts_with("x-amz-checksum-") && key != "CRC32"),
+                "{label}: no object-level checksum may reach the target's CreateMultipartUpload: {:?}",
+                opts.user_metadata
            );
        }
    }
@@ -48,7 +48,8 @@ pub use internode_data_transport::build_internode_data_transport_from_env;
 pub(crate) use peer_rest_client::TierConfigReloadOutcome;
 pub use peer_rest_client::{
    KMS_SIGNAL_SUBSYSTEM, PEER_RESTDRY_RUN, PEER_RESTSIGNAL, PEER_RESTSUB_SYS, PeerRestClient, SERVICE_SIGNAL_REFRESH_CONFIG,
-    SERVICE_SIGNAL_RELOAD_DYNAMIC, ScannerPeerActivity, ScannerPeerDirtyUsageSnapshot, ScannerPublicationLease,
+    SERVICE_SIGNAL_RELOAD_DYNAMIC, ScannerDirtyUsageAcknowledgement, ScannerPeerActivity, ScannerPeerDirtyUsageBucket,
+    ScannerPeerDirtyUsageSnapshot, ScannerPublicationLease, ScannerScopedDirtyUsageAckEntry,
 };
 pub(crate) use peer_s3_client::heal_bucket_local_on_disks;
 pub use peer_s3_client::{
@@ -49,10 +49,11 @@ use rustfs_protos::proto_gen::node_service::{
    LoadRebalanceMetaRequest, LoadServiceAccountRequest, LoadTransitionTierConfigRequest, LoadUserRequest,
    LocalStorageInfoRequest, Mss, ReloadPoolMetaRequest, ReloadSiteReplicationConfigRequest, ReplacementRecoveryStatusRequest,
    ScannerActivityRequest, ScannerActivityResponse, ScannerDirtyUsageSnapshotRequest, ScannerDirtyUsageSnapshotResponse,
-    ScannerPublicationLeaseReleaseRequest, ScannerPublicationLeaseRequest, ScannerPublicationLeaseResponse, ServerInfoRequest,
-    SignalServiceRequest, SignalServiceResponse, StartDecommissionRequest, StartProfilingRequest, StopRebalanceRequest,
-    TierDailyStatsRequest, TierMutationAbortRequest, TierMutationCommitRequest, TierMutationControlResponse,
-    TierMutationFailureClass, TierMutationPeerState, TierMutationPrepareRequest, node_service_client::NodeServiceClient,
+    ScannerPublicationLeaseReleaseRequest, ScannerPublicationLeaseRequest, ScannerPublicationLeaseResponse,
+    ScannerScopedDirtyUsageAckRequest, ScannerScopedDirtyUsageEntry, ServerInfoRequest, SignalServiceRequest,
+    SignalServiceResponse, StartDecommissionRequest, StartProfilingRequest, StopRebalanceRequest, TierDailyStatsRequest,
+    TierMutationAbortRequest, TierMutationCommitRequest, TierMutationControlResponse, TierMutationFailureClass,
+    TierMutationPeerState, TierMutationPrepareRequest, node_service_client::NodeServiceClient,
    tier_mutation_control_service_client::TierMutationControlServiceClient,
 };
 pub use rustfs_protos::{PEER_RESTDRY_RUN, PEER_RESTSIGNAL, PEER_RESTSUB_SYS};
@@ -68,7 +69,10 @@ use std::{
    },
    time::SystemTime,
 };
-use tokio::{net::TcpStream, time::Duration};
+use tokio::{
+    net::TcpStream,
+    time::{Duration, timeout},
+};
 use tonic::Request;
 use tonic::service::interceptor::InterceptedService;
 use tracing::{debug, info, warn};
@@ -89,6 +93,7 @@ const HEAL_CONTROL_PAYLOAD_MAX_SIZE: usize = 64 * 1024;
 const PEER_REST_RECOVERY_MAX_ATTEMPTS: u32 = 60;
 const PEER_REST_RECOVERY_MAX_BACKOFF: Duration = Duration::from_secs(30);
 const SCANNER_ACTIVITY_MAX_MESSAGE_SIZE: usize = 1024;
+const SCANNER_SCOPED_DIRTY_USAGE_STAGE_TIMEOUT: Duration = Duration::from_secs(5);
 /// Reserve time for the acquire response's network/clock uncertainty.  The
 /// server owns the real expiry; this local deadline is intentionally earlier
 /// so a coordinator never starts a bounded persistence operation at the edge
@@ -189,12 +194,102 @@ pub struct ScannerPeerActivity {

 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct ScannerPeerDirtyUsageSnapshot {
+    pub owner_id: String,
    pub instance_id: String,
    pub generation: u64,
    pub pending_bucket_count: u64,
    pub protocol_version: u32,
    pub complete: bool,
-    pub buckets: BTreeMap<String, u64>,
+    pub buckets: BTreeMap<String, ScannerPeerDirtyUsageBucket>,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct ScannerPeerDirtyUsageBucket {
+    pub bucket_incarnation: Uuid,
+    pub generation: u64,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct ScannerScopedDirtyUsageAckEntry {
+    pub bucket: String,
+    pub bucket_incarnation: Uuid,
+    pub generation: u64,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum ScannerDirtyUsageAcknowledgement {
+    Generation {
+        host: String,
+        instance_id: String,
+        generation: u64,
+    },
+    Scoped {
+        host: String,
+        owner_id: String,
+        instance_id: String,
+        entries: Vec<ScannerScopedDirtyUsageAckEntry>,
+    },
+}
+
+fn scanner_scoped_dirty_usage_ack_payloads(
+    owner_id: String,
+    instance_id: String,
+    probe_only: bool,
+    entries: Vec<ScannerScopedDirtyUsageAckEntry>,
+) -> Result<Vec<ScannerScopedDirtyUsageAckRequest>> {
+    use rustfs_protos::scoped_dirty_usage::*;
+
+    if entries.is_empty() {
+        return Err(Error::other("scoped dirty usage acknowledgement entries must be nonempty"));
+    }
+
+    let mut payloads = Vec::with_capacity(entries.len().div_ceil(SCOPED_DIRTY_USAGE_MAX_ENTRIES as usize));
+    let mut batch = Vec::with_capacity(SCOPED_DIRTY_USAGE_MAX_ENTRIES as usize);
+    for entry in entries {
+        batch.push(ScannerScopedDirtyUsageEntry {
+            bucket: entry.bucket,
+            bucket_incarnation: entry.bucket_incarnation.as_bytes().to_vec().into(),
+            generation: entry.generation,
+        });
+        if batch.len() == SCOPED_DIRTY_USAGE_MAX_ENTRIES as usize {
+            payloads.push(scanner_scoped_dirty_usage_ack_payload(
+                &owner_id,
+                &instance_id,
+                probe_only,
+                std::mem::take(&mut batch),
+            )?);
+        }
+    }
+    if !batch.is_empty() {
+        payloads.push(scanner_scoped_dirty_usage_ack_payload(&owner_id, &instance_id, probe_only, batch)?);
+    }
+
+    Ok(payloads)
+}
+
+fn scanner_scoped_dirty_usage_ack_payload(
+    owner_id: &str,
+    instance_id: &str,
+    probe_only: bool,
+    entries: Vec<ScannerScopedDirtyUsageEntry>,
+) -> Result<ScannerScopedDirtyUsageAckRequest> {
+    use rustfs_protos::scoped_dirty_usage::*;
+
+    let payload = ScannerScopedDirtyUsageAckRequest {
+        challenge: Uuid::new_v4().as_bytes().to_vec().into(),
+        protocol_version: SCOPED_DIRTY_USAGE_PROTOCOL_VERSION,
+        owner_id: owner_id.to_string(),
+        instance_id: instance_id.to_string(),
+        scope: SCOPED_DIRTY_USAGE_BUCKET_SCOPE,
+        probe_only,
+        entries,
+    };
+    canonical_scoped_dirty_usage_request(&payload).map_err(|err| Error::other(err.to_string()))?;
+    Ok(payload)
+}
+
+fn scanner_scoped_dirty_usage_ack_reconciled(activity: &ScannerPeerActivity, expected_instance_id: &str) -> bool {
+    activity.instance_id == expected_instance_id && activity.dirty_usage_pending == Some(false)
 }

 fn scanner_instance_id_is_valid(instance_id: &str) -> bool {
@@ -348,6 +443,11 @@ fn decode_scanner_dirty_usage_snapshot_with_verifier(
    if !scanner_instance_id_is_valid(&response.instance_id) {
        return Err(Error::other("peer returned an invalid scanner dirty usage snapshot instance ID"));
    }
+    let owner_id = Uuid::parse_str(&response.owner_id)
+        .ok()
+        .filter(|owner_id| !owner_id.is_nil())
+        .map(|owner_id| owner_id.to_string())
+        .ok_or_else(|| Error::other("peer returned an invalid scanner dirty usage snapshot owner"))?;
    if response.generation == u64::MAX {
        return Err(Error::other("peer scanner dirty usage snapshot exhausted its generation"));
    }
@@ -383,9 +483,14 @@ fn decode_scanner_dirty_usage_snapshot_with_verifier(
        if bucket.generation == 0 || bucket.generation > response.generation {
            return Err(Error::other("peer scanner dirty usage snapshot contains an invalid bucket generation"));
        }
+        Uuid::from_slice(bucket.bucket_incarnation.as_ref())
+            .ok()
+            .filter(|bucket_incarnation| !bucket_incarnation.is_nil())
+            .ok_or_else(|| Error::other("peer scanner dirty usage snapshot contains an invalid bucket incarnation"))?;
    }

    Ok(ScannerPeerDirtyUsageSnapshot {
+        owner_id,
        instance_id: response.instance_id,
        generation: response.generation,
        pending_bucket_count: response.pending_bucket_count,
@@ -394,7 +499,16 @@ fn decode_scanner_dirty_usage_snapshot_with_verifier(
        buckets: response
            .buckets
            .into_iter()
-            .map(|bucket| (bucket.bucket, bucket.generation))
+            .map(|bucket| {
+                (
+                    bucket.bucket,
+                    ScannerPeerDirtyUsageBucket {
+                        bucket_incarnation: Uuid::from_slice(bucket.bucket_incarnation.as_ref())
+                            .expect("bucket incarnation was validated"),
+                        generation: bucket.generation,
+                    },
+                )
+            })
            .collect(),
    })
 }
@@ -874,6 +988,16 @@ impl PeerRestClient {
        self.offline.store(false, Ordering::Release);
    }

+    /// Prepare a retry without allowing connection-cache cleanup to extend the
+    /// caller's probe deadline. The offline gate is cleared even when eviction
+    /// times out so a cancelled cleanup cannot strand the peer in fast-fail
+    /// mode; a later request can perform a fresh eviction if needed.
+    pub async fn prepare_retry_with_timeout(&self, timeout_duration: Duration) -> bool {
+        let evicted = timeout(timeout_duration, self.evict_connection()).await.is_ok();
+        self.offline.store(false, Ordering::Release);
+        evicted
+    }
+
    /// Whether this failure means the peer is unreachable, so it should be
    /// gated offline and its connection evicted.
    ///
@@ -1675,6 +1799,24 @@ impl PeerRestClient {
        Ok((self.topology_member.clone(), supported_version, epoch))
    }

+    pub async fn probe_ilm_recovery_export(&self, topology_fingerprint: String) -> Result<(String, Uuid)> {
+        let probe = rustfs_protos::ilm_recovery_export_capability_probe(Uuid::new_v4().as_bytes());
+        let result = self
+            .heal_control(rustfs_protos::HEAL_CONTROL_PROTOCOL_VERSION, topology_fingerprint, probe)
+            .await?;
+        let epoch = decode_remote_version_state_capability(&self.topology_member, &result)?;
+        Ok((self.topology_member.clone(), epoch))
+    }
+
+    pub async fn probe_transition_transaction_compaction(&self, topology_fingerprint: String) -> Result<(String, Uuid)> {
+        let probe = rustfs_protos::transition_transaction_compaction_capability_probe(Uuid::new_v4().as_bytes());
+        let result = self
+            .heal_control(rustfs_protos::HEAL_CONTROL_PROTOCOL_VERSION, topology_fingerprint, probe)
+            .await?;
+        let epoch = decode_remote_version_state_capability(&self.topology_member, &result)?;
+        Ok((self.topology_member.clone(), epoch))
+    }
+
    pub async fn load_bucket_metadata(&self, bucket: &str, scanner_maintenance_change: bool) -> Result<()> {
        let result = tokio::time::timeout(BUCKET_METADATA_RELOAD_TIMEOUT, async {
            let result = self.load_bucket_metadata_once(bucket, scanner_maintenance_change).await;
@@ -2055,19 +2197,10 @@ impl PeerRestClient {
        &self,
        owner_id: String,
        instance_id: String,
-        entries: Vec<rustfs_protos::proto_gen::node_service::ScannerScopedDirtyUsageEntry>,
+        entries: Vec<ScannerScopedDirtyUsageAckEntry>,
    ) -> Result<bool> {
        use rustfs_protos::scoped_dirty_usage::*;
-        let payload = rustfs_protos::proto_gen::node_service::ScannerScopedDirtyUsageAckRequest {
-            challenge: Uuid::new_v4().as_bytes().to_vec().into(),
-            protocol_version: SCOPED_DIRTY_USAGE_PROTOCOL_VERSION,
-            owner_id,
-            instance_id,
-            scope: SCOPED_DIRTY_USAGE_BUCKET_SCOPE,
-            probe_only: true,
-            entries,
-        };
-        let canonical = canonical_scoped_dirty_usage_request(&payload).map_err(|err| Error::other(err.to_string()))?;
+        let payloads = scanner_scoped_dirty_usage_ack_payloads(owner_id, instance_id, true, entries)?;
        self.finalize_result(
            async {
                let mut client = super::client::scanner_control_time_out_client(
@@ -2075,6 +2208,9 @@ impl PeerRestClient {
                    TonicInterceptor::Signature(gen_tonic_signature_interceptor()),
                )
                .await?;
+                for payload in payloads {
+                    let canonical =
+                        canonical_scoped_dirty_usage_request(&payload).map_err(|err| Error::other(err.to_string()))?;
                    let mut request = Request::new(payload.clone());
                    set_tonic_canonical_body_digest(&mut request, &canonical)?;
                    let response = client.scanner_scoped_dirty_usage_ack(request).await?.into_inner();
@@ -2090,13 +2226,90 @@ impl PeerRestClient {
                    {
                        return Err(Error::other("scoped dirty usage capability response does not match request"));
                    }
-                Ok(response.supported)
+                    if !response.supported {
+                        return Ok(false);
+                    }
+                }
+                Ok(true)
            }
            .await,
        )
        .await
    }

+    pub async fn acknowledge_scanner_scoped_dirty_usage(
+        &self,
+        owner_id: String,
+        instance_id: String,
+        entries: Vec<ScannerScopedDirtyUsageAckEntry>,
+    ) -> Result<ScannerPeerActivity> {
+        use rustfs_protos::scoped_dirty_usage::*;
+        let payloads = scanner_scoped_dirty_usage_ack_payloads(owner_id, instance_id.clone(), false, entries)?;
+        let ack_attempt = async {
+            let mut client = super::client::scanner_control_time_out_client(
+                &self.grid_host,
+                TonicInterceptor::Signature(gen_tonic_signature_interceptor()),
+            )
+            .await?;
+            for payload in payloads {
+                let canonical = canonical_scoped_dirty_usage_request(&payload).map_err(|err| Error::other(err.to_string()))?;
+                let mut request = Request::new(payload.clone());
+                set_tonic_canonical_body_digest(&mut request, &canonical)?;
+                let response = client.scanner_scoped_dirty_usage_ack(request).await?.into_inner();
+                let body = canonical_scoped_dirty_usage_response(&canonical, &response)
+                    .map_err(|_| Error::other("scoped dirty usage acknowledgement response is too large"))?;
+                verify_tonic_rpc_response_proof(&body, response.response_proof.as_ref())?;
+                if response.protocol_version != SCOPED_DIRTY_USAGE_PROTOCOL_VERSION
+                    || response.owner_id != payload.owner_id
+                    || response.instance_id != payload.instance_id
+                    || response.max_entries != SCOPED_DIRTY_USAGE_MAX_ENTRIES
+                    || response.max_request_bytes != SCOPED_DIRTY_USAGE_MAX_REQUEST_BYTES
+                    || !response.supported
+                {
+                    return Err(Error::other("scoped dirty usage acknowledgement response does not match request"));
+                }
+            }
+            Ok(())
+        };
+        let result = match timeout(SCANNER_SCOPED_DIRTY_USAGE_STAGE_TIMEOUT, ack_attempt).await {
+            Ok(result) => self.finalize_result(result).await,
+            Err(_) => {
+                self.prepare_retry_with_timeout(SCANNER_SCOPED_DIRTY_USAGE_STAGE_TIMEOUT)
+                    .await;
+                Err(Error::other("scoped dirty usage acknowledgement deadline elapsed"))
+            }
+        };
+
+        match result {
+            Ok(()) => {
+                let activity = self.scanner_scoped_dirty_usage_activity_confirmation().await?;
+                if activity.instance_id == instance_id {
+                    Ok(activity)
+                } else {
+                    Err(Error::other(
+                        "scoped dirty usage acknowledgement peer restarted before activity confirmation",
+                    ))
+                }
+            }
+            Err(err) => {
+                if Self::is_network_like_error(&err) {
+                    self.prepare_retry_with_timeout(SCANNER_SCOPED_DIRTY_USAGE_STAGE_TIMEOUT)
+                        .await;
+                }
+                match self.scanner_scoped_dirty_usage_activity_confirmation().await {
+                    Ok(activity) if scanner_scoped_dirty_usage_ack_reconciled(&activity, &instance_id) => Ok(activity),
+                    _ => Err(err),
+                }
+            }
+        }
+    }
+
+    async fn scanner_scoped_dirty_usage_activity_confirmation(&self) -> Result<ScannerPeerActivity> {
+        timeout(SCANNER_SCOPED_DIRTY_USAGE_STAGE_TIMEOUT, self.scanner_activity())
+            .await
+            .map_err(|_| Error::other("scoped dirty usage activity confirmation timed out"))?
+    }
+
    pub async fn acknowledge_scanner_dirty_usage(&self, instance_id: String, generation: u64) -> Result<ScannerPeerActivity> {
        let result = self
            .scanner_activity_request_with_protocol(instance_id.clone(), generation, SCANNER_ACTIVITY_PROTOCOL_VERSION)
@@ -2823,16 +3036,79 @@ mod tests {
                rustfs_protos::proto_gen::node_service::ScannerDirtyUsageBucket {
                    bucket: "archive".to_string(),
                    generation: 3,
+                    bucket_incarnation: Uuid::from_u128(0x11111111111111111111111111111111).as_bytes().to_vec().into(),
                },
                rustfs_protos::proto_gen::node_service::ScannerDirtyUsageBucket {
                    bucket: "photos".to_string(),
                    generation: 7,
+                    bucket_incarnation: Uuid::from_u128(0x22222222222222222222222222222222).as_bytes().to_vec().into(),
                },
            ],
            response_proof: b"proof".to_vec().into(),
+            owner_id: "33333333-3333-3333-3333-333333333333".to_string(),
        }
    }

+    #[test]
+    fn scanner_scoped_dirty_usage_ack_payloads_split_at_protocol_limit() {
+        use rustfs_protos::scoped_dirty_usage::{SCOPED_DIRTY_USAGE_MAX_ENTRIES, canonical_scoped_dirty_usage_request};
+
+        let entries = (0..=SCOPED_DIRTY_USAGE_MAX_ENTRIES)
+            .map(|index| ScannerScopedDirtyUsageAckEntry {
+                bucket: format!("bucket-{index:02}"),
+                bucket_incarnation: Uuid::from_u128(0x11111111111111111111111111111111),
+                generation: 9,
+            })
+            .collect::<Vec<_>>();
+
+        let payloads = scanner_scoped_dirty_usage_ack_payloads(
+            "33333333-3333-3333-3333-333333333333".to_string(),
+            "0123456789abcdef0123456789abcdef".to_string(),
+            false,
+            entries,
+        )
+        .expect("33 entries should split into valid scoped dirty usage requests");
+
+        assert_eq!(payloads.len(), 2);
+        assert_eq!(payloads[0].entries.len(), SCOPED_DIRTY_USAGE_MAX_ENTRIES as usize);
+        assert_eq!(payloads[1].entries.len(), 1);
+        assert_eq!(payloads[0].entries.first().map(|entry| entry.bucket.as_str()), Some("bucket-00"));
+        assert_eq!(payloads[0].entries.last().map(|entry| entry.bucket.as_str()), Some("bucket-31"));
+        assert_eq!(payloads[1].entries.first().map(|entry| entry.bucket.as_str()), Some("bucket-32"));
+        for payload in payloads {
+            canonical_scoped_dirty_usage_request(&payload).expect("each split scoped ACK payload should be canonical");
+        }
+    }
+
+    #[test]
+    fn scanner_scoped_dirty_usage_ack_reconciliation_requires_same_clean_instance() {
+        let activity = |instance_id: &str, pending| ScannerPeerActivity {
+            instance_id: instance_id.to_string(),
+            namespace_generation: 1,
+            maintenance_generation: 1,
+            protocol_version: SCANNER_ACTIVITY_PROTOCOL_VERSION,
+            topology_digest: Some([1; 32]),
+            data_movement_active: Some(false),
+            dirty_usage_generation: Some(9),
+            dirty_usage_pending: pending,
+            movement_generation: Some(1),
+            publication_blocked: Some(false),
+        };
+
+        assert!(scanner_scoped_dirty_usage_ack_reconciled(
+            &activity("0123456789abcdef0123456789abcdef", Some(false)),
+            "0123456789abcdef0123456789abcdef"
+        ));
+        assert!(!scanner_scoped_dirty_usage_ack_reconciled(
+            &activity("0123456789abcdef0123456789abcdef", Some(true)),
+            "0123456789abcdef0123456789abcdef"
+        ));
+        assert!(!scanner_scoped_dirty_usage_ack_reconciled(
+            &activity("fedcba9876543210fedcba9876543210", Some(false)),
+            "0123456789abcdef0123456789abcdef"
+        ));
+    }
+
    #[test]
    fn scanner_dirty_usage_snapshot_requires_a_complete_authenticated_ordered_view() {
        let decoded = decode_test_scanner_dirty_usage_snapshot(test_scanner_dirty_usage_snapshot_response())
@@ -2841,9 +3117,18 @@ mod tests {
        assert_eq!(decoded.generation, 7);
        assert_eq!(decoded.pending_bucket_count, 2);
        assert_eq!(decoded.protocol_version, SCANNER_DIRTY_USAGE_SNAPSHOT_PROTOCOL_VERSION);
+        assert_eq!(decoded.owner_id, "33333333-3333-3333-3333-333333333333");
        assert!(decoded.complete);
-        assert_eq!(decoded.buckets.get("archive"), Some(&3));
-        assert_eq!(decoded.buckets.get("photos"), Some(&7));
+        assert_eq!(
+            decoded.buckets.get("archive").map(|bucket| bucket.bucket_incarnation),
+            Some(Uuid::from_u128(0x11111111111111111111111111111111))
+        );
+        assert_eq!(decoded.buckets.get("archive").map(|bucket| bucket.generation), Some(3));
+        assert_eq!(
+            decoded.buckets.get("photos").map(|bucket| bucket.bucket_incarnation),
+            Some(Uuid::from_u128(0x22222222222222222222222222222222))
+        );
+        assert_eq!(decoded.buckets.get("photos").map(|bucket| bucket.generation), Some(7));

        let overflow_count =
            u64::try_from(SCANNER_DIRTY_USAGE_SNAPSHOT_MAX_ENTRIES + 1).expect("the test snapshot entry limit should fit in u64");
@@ -2894,6 +3179,14 @@ mod tests {
        empty_bucket.buckets[0].bucket.clear();
        cases.push((empty_bucket, "empty bucket name"));

+        let mut invalid_owner = test_scanner_dirty_usage_snapshot_response();
+        invalid_owner.owner_id.clear();
+        cases.push((invalid_owner, "snapshot owner"));
+
+        let mut invalid_incarnation = test_scanner_dirty_usage_snapshot_response();
+        invalid_incarnation.buckets[0].bucket_incarnation = Uuid::nil().as_bytes().to_vec().into();
+        cases.push((invalid_incarnation, "bucket incarnation"));
+
        let mut partial = test_scanner_dirty_usage_snapshot_response();
        partial.complete = false;
        cases.push((partial, "entry-limit overflow"));
@@ -2906,6 +3199,7 @@ mod tests {
                .map(|index| rustfs_protos::proto_gen::node_service::ScannerDirtyUsageBucket {
                    bucket: format!("bucket-{index:04}"),
                    generation: 1,
+                    bucket_incarnation: Uuid::from_u128(0x11111111111111111111111111111111).as_bytes().to_vec().into(),
                })
                .collect(),
            ..test_scanner_dirty_usage_snapshot_response()
@@ -449,14 +449,6 @@ where
    Ok(data)
 }

-pub(crate) async fn read_config_limited<S>(api: Arc<S>, file: &str, max_bytes: usize) -> Result<Vec<u8>>
-where
-    S: EcstoreObjectIO,
-{
-    let (data, _obj) = read_config_with_metadata_inner(api, file, &ObjectOptions::default(), false, Some(max_bytes)).await?;
-    Ok(data)
-}
-
 pub(crate) async fn read_config_limited_preserve_empty<S>(api: Arc<S>, file: &str, max_bytes: usize) -> Result<Vec<u8>>
 where
    S: EcstoreObjectIO,
@@ -465,6 +457,14 @@ where
    Ok(data)
 }

+pub(crate) async fn read_config_limited<S>(api: Arc<S>, file: &str, max_bytes: usize) -> Result<Vec<u8>>
+where
+    S: EcstoreObjectIO,
+{
+    let (data, _obj) = read_config_with_metadata_inner(api, file, &ObjectOptions::default(), false, Some(max_bytes)).await?;
+    Ok(data)
+}
+
 pub(crate) async fn read_config_limited_preserve_empty_with_metadata<S>(
    api: Arc<S>,
    file: &str,
@@ -476,6 +476,18 @@ where
    read_config_with_metadata_inner(api, file, &ObjectOptions::default(), true, Some(max_bytes)).await
 }

+pub(crate) async fn read_config_limited_preserve_empty_with_metadata_opts<S>(
+    api: Arc<S>,
+    file: &str,
+    opts: &ObjectOptions,
+    max_bytes: usize,
+) -> Result<(Vec<u8>, ObjectInfo)>
+where
+    S: EcstoreObjectIO,
+{
+    read_config_with_metadata_inner(api, file, opts, true, Some(max_bytes)).await
+}
+
 /// Read an existing config object without treating an empty payload as absent.
 /// Callers that validate their own payload format need to distinguish corruption
 /// from `ConfigNotFound`.
@@ -747,19 +747,28 @@ mod tests {
        let mut kvs = KVS::new();
        kvs.insert(CLASS_STANDARD.to_string(), "EC:2".to_string());

-        let err = lookup_config_for_pools_with_env(&kvs, &[4, 2], no_env_overrides())
-            .expect_err("EC:2 must be rejected by the two-drive pool");
+        for drives in [2, 3] {
+            let err = lookup_config_for_pools_with_env(&kvs, &[4, drives], no_env_overrides())
+                .expect_err("EC:2 must be rejected by a pool with fewer than four drives per set");
            assert!(
-            err.to_string().contains("pool 1") && err.to_string().contains("2 drives"),
+                err.to_string().contains("pool 1") && err.to_string().contains(&format!("{drives} drives")),
                "error must identify the rejecting pool: {err}"
            );
+        }
+
+        let cfg =
+            lookup_config_for_pools_with_env(&kvs, &[4, 4], no_env_overrides()).expect("EC:2 is valid for both four-drive pools");
+        assert_eq!(cfg.parities_for_sc(STANDARD), Some(vec![2, 2]));

        kvs.insert(CLASS_STANDARD.to_string(), "EC:1".to_string());
-        let cfg = lookup_config_for_pools_with_env(&kvs, &[4, 2], no_env_overrides()).expect("EC:1 is valid for both pools");
+        for drives in [2, 3, 4] {
+            let cfg =
+                lookup_config_for_pools_with_env(&kvs, &[4, drives], no_env_overrides()).expect("EC:1 is valid for both pools");
            assert_eq!(cfg.parity_for_sc(STANDARD, 4), Some(1));
-        assert_eq!(cfg.parity_for_sc(STANDARD, 2), Some(1));
+            assert_eq!(cfg.parity_for_sc(STANDARD, drives), Some(1));
            assert_eq!(cfg.get_parity_for_sc(STANDARD), Some(1));
        }
+    }

    #[test]
    fn environment_rrs_value_is_explicit_but_persisted_default_is_legacy() {
--- a/Show More
+++ b/Show More