chore(release): bump version to 1.0.0-rc.1 (#5834)

* chore(release): prepare 1.0.0-rc.1

* chore(release): align release assets for 1.0.0-rc.1

.agents/skills/rustfs-logging-governance/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: rustfs-logging-governance
-description: Standardize and review RustFS logging with structured `tracing` events, lower noise on hot paths, preserve security-sensitive diagnostics, and extend guardrails to prevent legacy logging patterns from returning. Use when editing or reviewing RustFS logs, startup/config diagnostics, cloud metadata logs, request validation logs, or `scripts/check_logging_guardrails.sh`.
+description: Standardize and review RustFS logging with structured `tracing` events, lower noise on hot paths, preserve security-sensitive diagnostics, and extend guardrails to prevent legacy logging patterns from returning. Use whenever a change adds or edits any `tracing` macro call (`error!`/`warn!`/`info!`/`debug!`/`trace!`/`#[instrument]`) — including a single log line added in passing while fixing unrelated logic, which is how most new log sites enter the repo — and when reviewing RustFS logs, startup/config diagnostics, cloud metadata logs, request validation logs, or `scripts/check_logging_guardrails.sh`.
 ---
 
 # RustFS Logging Governance

.config/make/lint-fmt.mak

@@ -60,6 +60,16 @@ body-cache-whitelist-check: ## Check the body-cache eligibility gate stays a fai
 	@echo "🧱 Checking body-cache whitelist guard..."
 	./scripts/check_body_cache_whitelist.sh
 
+.PHONY: s3s-footprint-check
+s3s-footprint-check: ## Check the s3s dependency footprint ratchet stays frozen
+	@echo "📦 Checking s3s footprint ratchet..."
+	./scripts/check_s3s_footprint.sh
+
+.PHONY: fips-wording-check
+fips-wording-check: ## Check outward docs do not make unsupported FIPS claims
+	@echo "📣 Checking FIPS wording guard..."
+	./scripts/check_fips_wording.sh
+
 .PHONY: log-analyzer-rules-check
 log-analyzer-rules-check: core-deps ## Check log-analyzer rule anchors still exist verbatim in source
 	@echo "🩺 Checking log-analyzer rule anchors..."

.config/make/pre-commit.mak

@@ -19,13 +19,13 @@ planning-docs-check: ## Check that no planning-type documents are committed
 	./scripts/check_no_planning_docs.sh
 
 .PHONY: pre-commit
-pre-commit: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check doc-paths-check planning-docs-check quick-check ## Run fast pre-commit checks without clippy/full tests
+pre-commit: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check s3s-footprint-check fips-wording-check doc-paths-check planning-docs-check quick-check ## Run fast pre-commit checks without clippy/full tests
 	@echo "✅ All pre-commit checks passed!"
 
 .PHONY: pre-pr
-pre-pr: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check doc-paths-check planning-docs-check log-analyzer-rules-check clippy-check test ## Run full pre-PR checks with clippy and tests
+pre-pr: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check s3s-footprint-check fips-wording-check doc-paths-check planning-docs-check log-analyzer-rules-check clippy-check test ## Run full pre-PR checks with clippy and tests
 	@echo "✅ All pre-PR checks passed!"
 
 .PHONY: dev-check
-dev-check: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check doc-paths-check planning-docs-check quick-check ## Run fast local development checks
+dev-check: fmt-check unsafe-code-check architecture-migration-check logging-guardrails-check tokio-io-uring-check extension-schema-check body-cache-whitelist-check s3s-footprint-check fips-wording-check doc-paths-check planning-docs-check quick-check ## Run fast local development checks
 	@echo "✅ Fast development checks passed!"

.config/nextest.toml

@@ -9,6 +9,8 @@
 #   * bucket_lifecycle_ops::tests::concurrent_resend_same_part_commits_one_generation
 #     uses the shared multipart fixture and a deterministic uploadId-lock
 #     handoff, so it must not overlap another process mutating that fixture.
+#   * bucket::metadata_sys::tests::concurrent_config_writes_from_separate_nodes_do_not_lose_writes
+#     uses the shared transaction lock and must not overlap other ecstore tests.
 #
 # serial_test's #[serial] attribute does NOT serialize these across runs:
 # nextest executes each test in its own process, where the in-process
@@ -27,6 +29,8 @@
 
 [test-groups]
 ecstore-serial-flaky = { max-threads = 1 }
+embedded-test-ports = { max-threads = 1 }
+e2e-vault = { max-threads = 1 }
 
 # Reliability / fault-injection e2e tests each spawn a single-node 4-disk RustFS
 # server and manipulate its disk directories at runtime (crates/e2e_test:
@@ -40,7 +44,7 @@ e2e-inline-boundaries = { max-threads = 1 }
 
 # --- default profile (local): serialize the flaky groups, never retry --------
 [[profile.default.overrides]]
-filter = 'package(rustfs-ecstore) & (test(concurrent_resend_same_part_commits_one_generation) | test(/^store::bucket::tests::bucket_delete_(mark_delete|purge_removes|default_s3_delete)/))'
+filter = 'package(rustfs-ecstore) & (test(concurrent_resend_same_part_commits_one_generation) | test(concurrent_config_writes_from_separate_nodes_do_not_lose_writes) | test(/^store::bucket::tests::bucket_delete_(mark_delete|purge_removes|default_s3_delete)/))'
 test-group = 'ecstore-serial-flaky'
 
 # Serialize the multipart crash-consistency scenarios (dist-2, backlog#1150):
@@ -52,12 +56,36 @@ test-group = 'ecstore-serial-flaky'
 filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::multipart::tests::crash_consistency::/)'
 test-group = 'ecstore-serial-flaky'
 
+# The production-handler relocation regression builds an isolated 8-disk,
+# 2-pool store and commits a 72 MiB multipart object. Keep that cross-disk IO
+# from overlapping the ecstore commit fixtures above.
+[[profile.default.overrides]]
+filter = 'package(rustfs) & test(execute_get_object_resumes_from_relocated_pool_without_splicing_body)'
+test-group = 'ecstore-serial-flaky'
+
+# Embedded integration-test binaries discover an ephemeral port and release
+# the probe listener before RustFS binds it. Serialize that cross-process
+# TOCTOU window; retries would only hide real startup failures.
+[[profile.default.overrides]]
+filter = 'package(rustfs) & (binary(/^embedded.*_test$/) | binary(admin_diagnostic_capability_e2e))'
+test-group = 'embedded-test-ports'
+
 # Serialize the durable manual-transition checkpoint test across nextest's
 # process boundary; it mutates bucket lifecycle metadata and is not quarantined.
 [[profile.default.overrides]]
 filter = 'package(rustfs-ecstore) & test(manual_transition_page_checkpoint_persists_durable_job_progress)'
 test-group = 'ecstore-serial-flaky'
 
+# Serialize the bucket-incarnation / lifecycle-fence tests. They drive
+# init_bucket_metadata_sys and bucket_metadata_sys_of, i.e. process-global
+# OnceLock state that serial_test's #[serial] cannot protect across nextest's
+# process boundary, and they delete+recreate buckets — the same shape that
+# raced into InsufficientWriteQuorum in backlog#937. Preventive only, no
+# retries. The matching ci-profile override is after [profile.ci].
+[[profile.default.overrides]]
+filter = 'package(rustfs-ecstore) & (test(bucket_delete_waits_for_config_mutation_fence) | test(stale_config_request_cannot_mutate_a_recreated_bucket) | test(disk_incarnation_read_detects_stale_cache_until_peer_reload) | test(lifecycle_expiry_fails_closed_on_corrupt_object_lock_metadata) | test(expiry_configs_are_resolved_from_the_owning_store))'
+test-group = 'ecstore-serial-flaky'
+
 # Serialize the 4-disk reliability / degraded-read e2e tests (see the
 # e2e-reliability test-group note above). The matching ci-profile override is at
 # the end of the file, after [profile.ci] is declared.
@@ -69,6 +97,12 @@ test-group = 'e2e-reliability'
 filter = 'package(e2e_test) & test(/^inline_fast_path_cluster_test::/)'
 test-group = 'e2e-inline-boundaries'
 
+# Vault KMS tests share the fixed dev-server port 8200. serial_test's #[serial]
+# does not cross nextest process boundaries, so keep these tests in one group.
+[[profile.default.overrides]]
+filter = 'package(e2e_test) & test(/^kms::kms_vault_test::/)'
+test-group = 'e2e-vault'
+
 # ---------------------------------------------------------------------------
 # ci profile — the strict CI gate (ci.yml `cargo nextest run --profile ci`)
 # ---------------------------------------------------------------------------
@@ -104,9 +138,9 @@ filter = 'package(rustfs-ecstore) & test(/^store::bucket::tests::bucket_delete_(
 test-group = 'ecstore-serial-flaky'
 retries = 2
 
-# Keep the deterministic multipart handoff isolated across nextest processes.
+# Keep deterministic ECStore write handoffs isolated across nextest processes.
 [[profile.ci.overrides]]
-filter = 'package(rustfs-ecstore) & test(concurrent_resend_same_part_commits_one_generation)'
+filter = 'package(rustfs-ecstore) & (test(concurrent_resend_same_part_commits_one_generation) | test(concurrent_config_writes_from_separate_nodes_do_not_lose_writes))'
 test-group = 'ecstore-serial-flaky'
 
 # QUARANTINE: OPEN rustfs#4690 — walk_dir stall-budget accounting test depends
@@ -131,12 +165,28 @@ test-group = 'e2e-reliability'
 filter = 'package(rustfs-ecstore) & test(/^set_disk::ops::multipart::tests::crash_consistency::/)'
 test-group = 'ecstore-serial-flaky'
 
+[[profile.ci.overrides]]
+filter = 'package(rustfs) & test(execute_get_object_resumes_from_relocated_pool_without_splicing_body)'
+test-group = 'ecstore-serial-flaky'
+
+# Match the default-profile embedded test isolation without quarantining or
+# retrying failures in CI.
+[[profile.ci.overrides]]
+filter = 'package(rustfs) & (binary(/^embedded.*_test$/) | binary(admin_diagnostic_capability_e2e))'
+test-group = 'embedded-test-ports'
+
 # Serialize the durable manual-transition checkpoint test under the ci profile
 # too. No retries: failures stay visible.
 [[profile.ci.overrides]]
 filter = 'package(rustfs-ecstore) & test(manual_transition_page_checkpoint_persists_durable_job_progress)'
 test-group = 'ecstore-serial-flaky'
 
+# Serialize the bucket-incarnation / lifecycle-fence tests under the ci profile
+# too (see the matching default-profile override near the top). No retries.
+[[profile.ci.overrides]]
+filter = 'package(rustfs-ecstore) & (test(bucket_delete_waits_for_config_mutation_fence) | test(stale_config_request_cannot_mutate_a_recreated_bucket) | test(disk_incarnation_read_detects_stale_cache_until_peer_reload) | test(lifecycle_expiry_fails_closed_on_corrupt_object_lock_metadata) | test(expiry_configs_are_resolved_from_the_owning_store))'
+test-group = 'ecstore-serial-flaky'
+
 # ---------------------------------------------------------------------------
 # e2e-smoke profile — PR smoke subset of the e2e_test crate (backlog#1149 ci-4)
 # ---------------------------------------------------------------------------
@@ -168,7 +218,7 @@ test-group = 'ecstore-serial-flaky'
 # the nightly profile derives its set as "the replication module MINUS this
 # allowlist", so any new replication test lands in nightly by default (never
 # silently unrun) until it is explicitly blessed as fast here. Keep the two
-# regexes byte-identical. Count invariant: 20 here + 28 nightly = 48 total
+# regexes byte-identical. Count invariant: 20 here + 36 nightly = 56 total
 # (authority: `cargo nextest list`; docs/testing/e2e-suite-inventory.md).
 # HISTORY (2026-07-11): the 20 fast tests were briefly pulled out of this lane
 # (#4724) because they set a loopback (127.0.0.1) replication target that the
@@ -204,7 +254,7 @@ test-group = 'ecstore-serial-flaky'
 [profile.e2e-smoke]
 default-filter = """
     package(e2e_test) & (
-        test(/^(delete_marker_migration_semantics|version_id_regression|list_objects_v2_pagination|list_object_versions_regression|list_objects_duplicates|list_buckets_double_slash|leading_slash_key|special_chars|create_bucket_region|delete_objects_versioning|head_object_consistency|head_object_range|copy_object_metadata|copy_object_tagging|copy_source_invalid_date|content_encoding|multipart_storage_class|storage_class_capability|ssec_copy|anonymous_access|bucket_policy_check|presigned_negative|negative_sigv4|admin_auth|notification_webhook|tls_hot_reload|console_smoke|admin_iam_crud|admin_pools|sts_query_compat)_test::|^fake_s3_target::/)
+        test(/^(delete_marker_migration_semantics|version_id_regression|list_objects_v2_pagination|list_object_versions_regression|list_objects_duplicates|list_buckets_double_slash|list_buckets_auth|list_buckets_iam_filter|leading_slash_key|special_chars|create_bucket_region|delete_objects_versioning|head_object_consistency|head_object_range|copy_object_metadata|copy_object_tagging|copy_source_invalid_date|content_encoding|multipart_storage_class|storage_class_capability|ssec_copy|anonymous_access|bucket_policy_check|presigned_negative|negative_sigv4|admin_auth|notification_webhook|tls_hot_reload|console_smoke|admin_iam_crud|admin_pools|sts_query_compat)_test::|^fake_s3_target::/)
         | test(/^replication_extension_test::(test_replication_check_succeeds_with_remote_target|test_replication_check_rejects_target_without_object_lock|test_set_remote_target_rejects_unversioned_source_bucket|test_replication_check_rejects_unversioned_source_bucket|test_replication_check_rejects_missing_replication_config|test_replication_check_rejects_invalid_bucket|test_set_remote_target_rejects_same_bucket_on_same_deployment|test_set_remote_target_rejects_unversioned_target_bucket|test_set_remote_target_update_requires_arn|test_set_remote_target_update_rejects_missing_target|test_set_remote_target_rejects_invalid_target_url|test_set_remote_target_rejects_self_signed_https_target_without_skip_tls_verify|test_set_remote_target_rejects_private_ca_https_target_without_ca_cert_pem|test_list_remote_targets_rejects_empty_bucket|test_list_remote_targets_rejects_invalid_bucket|test_remove_remote_target_rejects_missing_target|test_remove_remote_target_rejects_missing_arn|test_remove_remote_target_rejects_invalid_bucket|test_remove_remote_target_rejects_target_used_by_replication|test_delete_bucket_replication_removes_remote_target)$/)
         | test(/^reliant::lifecycle::/)
         | test(/^reliant::tiering::/)
@@ -212,6 +262,17 @@ default-filter = """
 """
 fail-fast = false
 
+[profile.e2e-smoke.junit]
+path = "junit.xml"
+
+# The pagination boundary cases can stall when a server/listing regression
+# prevents the continuation request from completing. Keep the timeout scoped
+# to those known failure modes so legitimate lifecycle/tiering waits retain
+# their test-level timing budget.
+[[profile.e2e-smoke.overrides]]
+filter = 'package(e2e_test) & test(/^list_objects_v2_pagination_test::tests::(test_list_objects_v2_delimiter_small_page_traverses_all|test_list_objects_v2_max_keys_above_limit_returns_token|test_list_objects_v2_maxkeys_above_limit_with_delimiter)$/)'
+slow-timeout = { period = "60s", terminate-after = 2, grace-period = "10s" }
+
 # ---------------------------------------------------------------------------
 # e2e-repl-nightly profile — scheduled full replication e2e lane (repl-1)
 # ---------------------------------------------------------------------------
@@ -219,10 +280,10 @@ fail-fast = false
 # tests that are unfit for the per-PR e2e-smoke gate:
 #
 #   * 2 remote-target TLS validation tests.
-#   * 12 bucket-replication data-plane/helper tests — they PUT/delete objects
-#     and poll until source and target converge; two replicate over HTTPS, two
-#     pin active SSE failure contracts, and one guards event/history observers.
-#     The SSE-S3 contract remains ignored under backlog#1291.
+#   * 13 bucket-replication data-plane/helper tests — they PUT/delete objects
+#     and poll until source and target converge; two replicate over HTTPS,
+#     four pin active SSE fail-closed contracts (SSE-C, SSE-S3, SSE-KMS, and
+#     the SSE-S3 resync path), and one guards event/history observers.
 #   * 12 `_real_dual_node` site-replication tests — each spawns TWO full rustfs
 #     servers and drives the cross-process site-replication control plane.
 #   * 1 `_real_three_node` site-replication test.
@@ -288,9 +349,9 @@ path = "junit.xml"
 #
 # Each e2e test spawns its own single-node rustfs server on a random port with
 # an isolated temp dir (crates/e2e_test/src/common.rs), so the set is
-# parallel-safe — the same property e2e-smoke relies on. The exception is the
-# 4-disk reliability / degraded-read fault-injection tests, serialized below
-# (identical to the ci profile) so several 4-disk servers never run at once.
+# parallel-safe — the same property e2e-smoke relies on. The exceptions are the
+# 4-disk reliability / degraded-read fault-injection tests and the fixed-port
+# Vault tests, both serialized below.
 # KNOWN-FAILURE EXCLUSIONS (characterization run 29381309848, 2026-07-15:
 # 341 ran / 32 failed on the suites' first automated run ever). Deterministic
 # product failures cannot be quarantined away with retries, so each family is
@@ -326,3 +387,7 @@ test-group = 'e2e-reliability'
 [[profile.e2e-full.overrides]]
 filter = 'package(e2e_test) & test(/^inline_fast_path_cluster_test::/)'
 test-group = 'e2e-inline-boundaries'
+
+[[profile.e2e-full.overrides]]
+filter = 'package(e2e_test) & test(/^kms::kms_vault_test::/)'
+test-group = 'e2e-vault'

.docker/observability/README.md

@@ -170,6 +170,10 @@ Important behavior notes:
 
 - Logs and metrics usually appear during startup, so seeing those two signals
   first is expected.
+- The OpenTelemetry bridge sends `tracing` fields as log attributes. Loki stores
+  those attributes as structured metadata, and the Collector also mirrors the
+  common troubleshooting fields into the log line so simple line filters can
+  find them.
 - Visible trace data usually requires real HTTP/S3/gRPC request traffic after
   startup, because request-path spans are created on demand.
 - `RUSTFS_OBS_LOGGER_LEVEL=info` keeps the top-level request span but filters
@@ -195,6 +199,17 @@ curl -I http://127.0.0.1:9000/health/ready
 # Jaeger:  http://localhost:16686
 ```
 
+For a structured RustFS log such as an inter-node RPC authentication failure,
+the Loki line now includes fields such as `event`, `component`, `subsystem`,
+`failure_reason`, `rpc_service`, `rpc_method`, and `expected_audience`. Useful
+LogQL checks:
+
+```logql
+{service_name="RustFS"} |= "RPC signature verification failed"
+{service_name="RustFS"} |= "failure_reason="
+{service_name="RustFS"} | failure_reason != ""
+```
+
 If logs and metrics are present but traces are sparse, the most common cause is
 "no real request traffic yet" or "`info` level filtered nested spans", not an
 OTLP routing failure.

.docker/observability/README_ZH.md

@@ -169,6 +169,7 @@ RustFS 会自动在该基础 URL 后补全：
 需要注意：
 
 - 启动阶段通常会先看到日志和指标，因此“先有日志/指标、后有 trace”是正常现象。
+- OpenTelemetry bridge 会把 `tracing` 字段作为日志 attributes 发送。Loki 会将这些 attributes 存为 structured metadata，同时 Collector 会把常用排障字段镜像进日志行，方便用简单的行内容过滤直接查到。
 - 可见的 trace 数据通常依赖启动后的真实 HTTP/S3/gRPC 请求流量，因为请求路径上的 span 是按需创建的。
 - `RUSTFS_OBS_LOGGER_LEVEL=info` 会保留顶层请求 span，但会过滤掉很多 `debug` 级别的嵌套 span。
   如果 Tempo 或 Jaeger 中的 trace 看起来很稀疏，建议先改成 `RUSTFS_OBS_LOGGER_LEVEL=debug`，再判断是否是 collector 或 Tempo 问题。
@@ -192,6 +193,14 @@ curl -I http://127.0.0.1:9000/health/ready
 # Jaeger:  http://localhost:16686
 ```
 
+对于 RustFS 结构化日志，例如节点间 RPC 鉴权失败，Loki 日志行现在会包含 `event`、`component`、`subsystem`、`failure_reason`、`rpc_service`、`rpc_method`、`expected_audience` 等字段。常用 LogQL 检查：
+
+```logql
+{service_name="RustFS"} |= "RPC signature verification failed"
+{service_name="RustFS"} |= "failure_reason="
+{service_name="RustFS"} | failure_reason != ""
+```
+
 如果日志和指标已经正常，但 trace 仍然稀疏，最常见的原因通常是
 “还没有真实请求流量”或“`info` 级别过滤了嵌套 span”，而不是 OTLP 路由失败。
 

.docker/observability/grafana/dashboards/rustfs.json

@@ -11500,6 +11500,831 @@
       ],
       "title": "Compression Operations Rate",
       "type": "timeseries"
+    },
+    {
+      "collapsed": false,
+      "gridPos": {
+        "h": 1,
+        "w": 24,
+        "x": 0,
+        "y": 332
+      },
+      "id": 531,
+      "panels": [],
+      "title": "Metrics Dimensions Drilldown",
+      "type": "row"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "smooth",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "never",
+            "showValues": false,
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": 0
+              }
+            ]
+          },
+          "unit": "ops"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 333
+      },
+      "id": 532,
+      "options": {
+        "legend": {
+          "calcs": [
+            "lastNotNull",
+            "max"
+          ],
+          "displayMode": "table",
+          "placement": "right",
+          "showLegend": true
+        },
+        "tooltip": {
+          "hideZeros": false,
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "pluginVersion": "12.3.2",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "A",
+          "expr": "sum by (server, name, type) (rate(rustfs_api_requests_requests_total_by_server{job=~\"$job\",server=~\"$server\",name=~\"$api\"}[$__rate_interval]))",
+          "legendFormat": "{{server}} | {{name}} | {{type}}"
+        }
+      ],
+      "title": "API Requests by Server and API",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "axisBorderShow": false,
+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
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+          "legendFormat": "{{server}} | {{drive}} | offline seconds"
+        }
+      ],
+      "title": "Drive Runtime State and Offline Duration",
+      "type": "timeseries"
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+        "type": "prometheus",
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+          "legendFormat": "{{server}} | {{drive}} | p{{pool_index}}/s{{set_index}}/d{{drive_index}} | {{api}}"
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+      "type": "timeseries"
+    },
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+        "type": "prometheus",
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+              "options": "B"
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+                "value": "short"
+              },
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+                "value": "right"
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+            "type": "prometheus",
+            "uid": "${datasource}"
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+          "range": true,
+          "refId": "A",
+          "expr": "sum by (server, source, state) (rate(rustfs_scanner_source_work_total{job=~\"$job\",server=~\"$server\",source=~\"$scanner_source\"}[$__rate_interval]))",
+          "legendFormat": "{{server}} | {{source}} | {{state}}"
+        },
+        {
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+            "type": "prometheus",
+            "uid": "${datasource}"
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+          "editorMode": "code",
+          "range": true,
+          "refId": "B",
+          "expr": "sum by (server, cycle_scope, source, state) (rustfs_scanner_cycle_source_work{job=~\"$job\",server=~\"$server\",source=~\"$scanner_source\"})",
+          "legendFormat": "{{server}} | {{cycle_scope}} | {{source}} | {{state}}"
+        }
+      ],
+      "title": "Scanner Source Work by Server",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
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+            "stacking": {
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+              "mode": "none"
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+              "mode": "off"
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+          "mappings": [],
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+                "value": 0
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+          "unit": "ops"
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+        "overrides": [
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+            "matcher": {
+              "id": "byFrameRefID",
+              "options": "B"
+            },
+            "properties": [
+              {
+                "id": "unit",
+                "value": "short"
+              },
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+                "id": "custom.axisPlacement",
+                "value": "right"
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+        "w": 12,
+        "x": 0,
+        "y": 349
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+          "mode": "multi",
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+      "targets": [
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+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "A",
+          "expr": "sum by (server, bucket, drive, result) (rate(rustfs_scanner_bucket_drive_result_total{job=~\"$job\",server=~\"$server\",bucket=~\"$bucket\",drive=~\"$drive\",result=~\"$scanner_result\"}[$__rate_interval]))",
+          "legendFormat": "{{server}} | {{bucket}} | {{drive}} | {{result}}"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "B",
+          "expr": "sum by (server, cycle_scope, bucket, drive, result) (rustfs_scanner_cycle_bucket_drive_result{job=~\"$job\",server=~\"$server\",bucket=~\"$bucket\",drive=~\"$drive\",result=~\"$scanner_result\"})",
+          "legendFormat": "{{server}} | {{cycle_scope}} | {{bucket}} | {{drive}} | {{result}}"
+        }
+      ],
+      "title": "Scanner Bucket Drive Results",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
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+            "axisPlacement": "auto",
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+            "gradientMode": "none",
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+            "lineInterpolation": "smooth",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
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+            "showPoints": "never",
+            "showValues": false,
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
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+                "value": 0
+              }
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+          "unit": "ops"
+        },
+        "overrides": [
+          {
+            "matcher": {
+              "id": "byFrameRefID",
+              "options": "B"
+            },
+            "properties": [
+              {
+                "id": "unit",
+                "value": "Bps"
+              }
+            ]
+          }
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+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 349
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+            "lastNotNull",
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+          "mode": "multi",
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+      "targets": [
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+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "A",
+          "expr": "sum by (bucket, target_arn) (rate(rustfs_bucket_replication_target_sent_count{job=~\"$job\",bucket=~\"$bucket\",target_arn=~\"$target_arn\"}[$__rate_interval]))",
+          "legendFormat": "sent objects | {{bucket}} | {{target_arn}}"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "B",
+          "expr": "sum by (bucket, target_arn) (rate(rustfs_bucket_replication_target_sent_bytes{job=~\"$job\",bucket=~\"$bucket\",target_arn=~\"$target_arn\"}[$__rate_interval]))",
+          "legendFormat": "sent bytes | {{bucket}} | {{target_arn}}"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "C",
+          "expr": "sum by (bucket, target_arn) (rate(rustfs_bucket_replication_target_total_failed_count{job=~\"$job\",bucket=~\"$bucket\",target_arn=~\"$target_arn\"}[$__rate_interval]))",
+          "legendFormat": "failed objects | {{bucket}} | {{target_arn}}"
+        }
+      ],
+      "title": "Bucket Replication Target Flow",
+      "type": "timeseries"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "${datasource}"
+      },
+      "fieldConfig": {
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+            "mode": "palette-classic"
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+            "axisCenteredZero": false,
+            "axisColorMode": "text",
+            "axisLabel": "",
+            "axisPlacement": "auto",
+            "barAlignment": 0,
+            "barWidthFactor": 0.6,
+            "drawStyle": "line",
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "hideFrom": {
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+              "tooltip": false,
+              "viz": false
+            },
+            "insertNulls": false,
+            "lineInterpolation": "smooth",
+            "lineWidth": 1,
+            "pointSize": 5,
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "showPoints": "never",
+            "showValues": false,
+            "spanNulls": false,
+            "stacking": {
+              "group": "A",
+              "mode": "none"
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": 0
+              }
+            ]
+          },
+          "unit": "short"
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 357
+      },
+      "id": 538,
+      "options": {
+        "legend": {
+          "calcs": [
+            "lastNotNull",
+            "max"
+          ],
+          "displayMode": "table",
+          "placement": "right",
+          "showLegend": true
+        },
+        "tooltip": {
+          "hideZeros": false,
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "pluginVersion": "12.3.2",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "A",
+          "expr": "max by (server, target_id) (rustfs_audit_target_queue_length_by_server{job=~\"$job\",server=~\"$server\"})",
+          "legendFormat": "audit queue | {{server}} | {{target_id}}"
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "editorMode": "code",
+          "range": true,
+          "refId": "B",
+          "expr": "max by (server, action, state) (rustfs_ilm_action_tasks{job=~\"$job\",server=~\"$server\"})",
+          "legendFormat": "ilm | {{server}} | {{action}} | {{state}}"
+        }
+      ],
+      "title": "Audit and ILM by Server",
+      "type": "timeseries"
     }
   ],
   "preload": false,
@@ -11551,6 +12376,32 @@
         "sort": 1,
         "type": "query"
       },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values(rustfs_system_drive_api_calls_total,api)",
+        "includeAll": true,
+        "label": "Drive API",
+        "multi": true,
+        "name": "drive_api",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values(rustfs_system_drive_api_calls_total,api)",
+          "refId": "PrometheusVariableQueryEditor-drive_api"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
+      },
       {
         "allValue": ".*",
         "current": {
@@ -11670,6 +12521,136 @@
         "regex": "",
         "sort": 1,
         "type": "query"
+      },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values(rustfs_api_requests_requests_total_by_server,server)",
+        "includeAll": true,
+        "label": "Server",
+        "multi": true,
+        "name": "server",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values(rustfs_api_requests_requests_total_by_server,server)",
+          "refId": "PrometheusVariableQueryEditor-server"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values(rustfs_api_requests_requests_total_by_server,name)",
+        "includeAll": true,
+        "label": "API",
+        "multi": true,
+        "name": "api",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values(rustfs_api_requests_requests_total_by_server,name)",
+          "refId": "PrometheusVariableQueryEditor-api"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values({__name__=\"rustfs_bucket_replication_target_sent_count\",bucket=~\"$bucket\"},target_arn)",
+        "includeAll": true,
+        "label": "Target ARN",
+        "multi": true,
+        "name": "target_arn",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values({__name__=\"rustfs_bucket_replication_target_sent_count\",bucket=~\"$bucket\"},target_arn)",
+          "refId": "PrometheusVariableQueryEditor-target_arn"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values(rustfs_scanner_source_work_total,source)",
+        "includeAll": true,
+        "label": "Scanner Source",
+        "multi": true,
+        "name": "scanner_source",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values(rustfs_scanner_source_work_total,source)",
+          "refId": "PrometheusVariableQueryEditor-scanner_source"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "datasource": {
+          "type": "prometheus",
+          "uid": "${datasource}"
+        },
+        "definition": "label_values(rustfs_scanner_bucket_drive_result_total,result)",
+        "includeAll": true,
+        "label": "Scanner Result",
+        "multi": true,
+        "name": "scanner_result",
+        "options": [],
+        "query": {
+          "qryType": 1,
+          "query": "label_values(rustfs_scanner_bucket_drive_result_total,result)",
+          "refId": "PrometheusVariableQueryEditor-scanner_result"
+        },
+        "refresh": 2,
+        "regex": "",
+        "sort": 1,
+        "type": "query"
       }
     ]
   },

.docker/observability/otel-collector-config.yaml

@@ -29,11 +29,27 @@ processors:
     limit_mib: 1024
     spike_limit_mib: 256
   transform/logs:
+    error_mode: ignore
     log_statements:
       - context: log
         statements:
-          - set(attributes["message"], body.string)
-          - set(attributes["log.body"], body.string)
+          - set(attributes["message"], body.string) where IsString(body)
+          - set(attributes["log.body"], body.string) where IsString(body)
+          - set(body, Concat([body, " event=", attributes["event"]], "")) where IsString(body) and attributes["event"] != nil
+          - set(body, Concat([body, " component=", attributes["component"]], "")) where IsString(body) and attributes["component"] != nil
+          - set(body, Concat([body, " subsystem=", attributes["subsystem"]], "")) where IsString(body) and attributes["subsystem"] != nil
+          - set(body, Concat([body, " state=", attributes["state"]], "")) where IsString(body) and attributes["state"] != nil
+          - set(body, Concat([body, " result=", attributes["result"]], "")) where IsString(body) and attributes["result"] != nil
+          - set(body, Concat([body, " reason=", attributes["reason"]], "")) where IsString(body) and attributes["reason"] != nil
+          - set(body, Concat([body, " failure_reason=", attributes["failure_reason"]], "")) where IsString(body) and attributes["failure_reason"] != nil
+          - set(body, Concat([body, " rpc_path=", attributes["rpc_path"]], "")) where IsString(body) and attributes["rpc_path"] != nil
+          - set(body, Concat([body, " rpc_service=", attributes["rpc_service"]], "")) where IsString(body) and attributes["rpc_service"] != nil
+          - set(body, Concat([body, " rpc_method=", attributes["rpc_method"]], "")) where IsString(body) and attributes["rpc_method"] != nil
+          - set(body, Concat([body, " expected_audience=", attributes["expected_audience"]], "")) where IsString(body) and attributes["expected_audience"] != nil
+          - set(body, Concat([body, " peer_addr=", attributes["peer_addr"]], "")) where IsString(body) and attributes["peer_addr"] != nil
+          - set(body, Concat([body, " replay_scope_bootstrap_allowed=", attributes["replay_scope_bootstrap_allowed"]], "")) where IsString(body) and attributes["replay_scope_bootstrap_allowed"] != nil
+          - set(body, Concat([body, " error=", attributes["error"]], "")) where IsString(body) and attributes["error"] != nil
+          - set(body, Concat([body, " exception_message=", attributes["exception.message"]], "")) where IsString(body) and attributes["exception.message"] != nil
 
 exporters:
   otlp/tempo:

.docker/observability/prometheus-rules/rustfs-kms-alerts.yml

@@ -17,9 +17,9 @@
 # =============================================================================
 #
 # Metric source: the KMS operation-policy choke point in
-# crates/kms/src/policy.rs. All label values are static enum strings
-# (operation, op_class, outcome, error_class); key identifiers, key material,
-# and tokens never appear in labels.
+# crates/kms/src/policy.rs. All label values are bounded static strings
+# (operation, op_class, outcome, error_class, backend, scope); key identifiers,
+# key material, and tokens never appear in labels.
 #
 # Response procedures: docs/operations/kms-observability-runbook.md
 #
@@ -70,8 +70,9 @@ groups:
       # ------------------------------------------------------------------
       # 2. KmsBackendHighErrorRate
       #    Sustained share of operations terminating without success
-      #    (fatal, budget_exhausted, deadline_exceeded). The cancelled
-      #    outcome is excluded because shutdowns legitimately produce it.
+      #    (fatal, budget/deadline exhaustion, admission backpressure,
+      #    or an open circuit). The cancelled outcome is excluded because
+      #    shutdowns legitimately produce it.
       #    The traffic guard keeps a single failure on a near-idle
       #    cluster from firing the alert.
       #    Threshold: 5% for 10m — conservative default, calibrate
@@ -94,9 +95,11 @@ groups:
           summary: "KMS backend non-success ratio above 5% for 10m"
           description: >-
             {{ $value | humanizePercentage }} of KMS backend operations
-            are terminating in fatal, budget_exhausted, or
-            deadline_exceeded. Object encryption and decryption paths
-            depending on the KMS are degraded or failing.
+            are terminating in fatal, budget_exhausted,
+            deadline_exceeded, backpressure_timeout,
+            backpressure_rejected, or circuit_open. Object encryption
+            and decryption paths depending on the KMS are degraded or
+            failing.
           runbook_url: "https://github.com/rustfs/rustfs/blob/main/docs/operations/kms-observability-runbook.md#kmsbackendhigherrorrate"
 
   # ==========================================================================
@@ -186,3 +189,26 @@ groups:
             Retryable failures are outlasting the retry budget, so
             callers are seeing hard failures.
           runbook_url: "https://github.com/rustfs/rustfs/blob/main/docs/operations/kms-observability-runbook.md#kmsbackendretrybudgetexhausted"
+
+      # ------------------------------------------------------------------
+      # 6. KmsBackendCircuitOpen
+      #    Direct circuit-state signal, independent of operation traffic.
+      #    A transient open can recover on its first half-open probe; alert
+      #    only when the circuit remains open or half-open for one minute.
+      # ------------------------------------------------------------------
+      - alert: KmsBackendCircuitOpen
+        expr: |
+          rustfs_kms_backend_circuit_open > 0
+        for: 1m
+        labels:
+          severity: warning
+          component: kms
+        annotations:
+          summary: "KMS backend circuit open ({{ $labels.backend }}/{{ $labels.scope }})"
+          description: >-
+            The KMS backend circuit for {{ $labels.backend }} scope
+            {{ $labels.scope }} has remained open or half-open for one
+            minute. Operations in this scope can terminate as
+            circuit_open until the half-open probe succeeds or returns
+            a non-retryable failure.
+          runbook_url: "https://github.com/rustfs/rustfs/blob/main/docs/operations/kms-observability-runbook.md#kmsbackendcircuitopen"

.github/workflows/audit.yml

@@ -24,6 +24,7 @@ on:
       - '.github/actions/**'
       - '.github/workflows/**'
       - 'scripts/release/create_or_update_release.sh'
+      - 'scripts/security/check_performance_ab_workflow.sh'
       - 'scripts/security/check_preview_release_workflow.sh'
       - 'scripts/security/check_workflow_pins.sh'
   pull_request:
@@ -36,6 +37,7 @@ on:
       - '.github/actions/**'
       - '.github/workflows/**'
       - 'scripts/release/create_or_update_release.sh'
+      - 'scripts/security/check_performance_ab_workflow.sh'
       - 'scripts/security/check_preview_release_workflow.sh'
       - 'scripts/security/check_workflow_pins.sh'
   schedule:
@@ -141,6 +143,9 @@ jobs:
       - name: Check preview release workflow policy
         run: ./scripts/security/check_preview_release_workflow.sh
 
+      - name: Check performance A/B workflow trust boundary
+        run: ./scripts/security/check_performance_ab_workflow.sh
+
   dependency-review:
     name: Dependency Review
     runs-on: ubuntu-latest

.github/workflows/ci-docs-only.yml

@@ -102,6 +102,9 @@ jobs:
       - 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
 
@@ -111,6 +114,9 @@ jobs:
       - 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 no planning docs committed
         run: ./scripts/check_no_planning_docs.sh
 

.github/workflows/ci.yml

@@ -137,6 +137,9 @@ jobs:
       - 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
 
@@ -146,6 +149,9 @@ jobs:
       - 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 no planning docs committed
         run: ./scripts/check_no_planning_docs.sh
 
@@ -340,9 +346,11 @@ jobs:
       - name: Annotate early-stop reason
         if: failure() && github.event_name == 'pull_request'
         run: |
-          echo "## CI early-stop" >> "$GITHUB_STEP_SUMMARY"
-          echo "Job \`${GITHUB_JOB}\` (Test and Lint) failed; cancelling run ${GITHUB_RUN_ID} to free runners." >> "$GITHUB_STEP_SUMMARY"
-          echo "Sibling jobs showing **cancelled** were stopped by this job, not by their own failure." >> "$GITHUB_STEP_SUMMARY"
+          {
+            echo "## CI early-stop"
+            echo "Job \`${GITHUB_JOB}\` (Test and Lint) failed; cancelling run ${GITHUB_RUN_ID} to free runners."
+            echo "Sibling jobs showing **cancelled** were stopped by this job, not by their own failure."
+          } >> "$GITHUB_STEP_SUMMARY"
 
       # curl rather than `gh`: every existing `gh` call in this repo runs on
       # ubuntu-latest, and the sm-standard-* images are custom and trimmed (they
@@ -665,15 +673,17 @@ jobs:
       - name: Make binary executable
         run: chmod +x ./target/debug/rustfs
 
-      # Guard the security negative-auth smoke subset (backlog#1151 sec-5)
-      # against a rename or deletion silently dropping it out of the e2e-smoke
-      # filter. The script lists what the profile selects and fails if the count
-      # of security auth-rejection tests falls below the committed floor in
-      # .config/security-smoke-floor.txt (infra-12 count-floor mechanism). Run
-      # before the smoke suite so a thinned gate fails fast; the `nextest list`
-      # here compiles the e2e_test binaries the run below reuses.
-      - name: Check security smoke subset count floor
-        run: ./scripts/check_security_smoke_count.sh check
+      # Build the e2e test graph once. The archive is reused by the security
+      # count-floor check and the smoke run below, avoiding a second compile of
+      # the same e2e_test target on cold runners (backlog#1645).
+      - name: Archive e2e smoke test binaries
+        env:
+          NEXTEST_ARCHIVE: ${{ runner.temp }}/rustfs-e2e-smoke.tar.zst
+          NEXTEST_LISTING: ${{ runner.temp }}/rustfs-e2e-smoke-list.json
+        run: |
+          cargo nextest archive --profile e2e-smoke -p e2e_test --archive-file "${NEXTEST_ARCHIVE}"
+          cargo nextest list --profile e2e-smoke --archive-file "${NEXTEST_ARCHIVE}" --message-format json > "${NEXTEST_LISTING}"
+          ./scripts/check_security_smoke_count.sh check "${NEXTEST_LISTING}"
 
       # PR smoke subset of the in-repo e2e suite (backlog#1149 ci-4). The
       # profile.e2e-smoke default-filter in .config/nextest.toml is the single
@@ -681,7 +691,30 @@ jobs:
       # adding new e2e jobs here. Each test spawns its own rustfs server on a
       # random port and reuses the downloaded debug binary above.
       - name: Run e2e smoke suite
-        run: cargo nextest run --profile e2e-smoke -p e2e_test
+        env:
+          NEXTEST_ARCHIVE: ${{ runner.temp }}/rustfs-e2e-smoke.tar.zst
+          RUSTFS_E2E_LOG_DIR: ${{ runner.temp }}/rustfs-e2e-smoke-logs
+        run: |
+          cargo nextest run --profile e2e-smoke --archive-file "${NEXTEST_ARCHIVE}" \
+            --status-level all --final-status-level all --failure-output final
+
+      - name: Upload e2e smoke diagnostics
+        if: failure()
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        with:
+          name: e2e-smoke-diagnostics-${{ github.run_number }}
+          path: |
+            ${{ runner.temp }}/rustfs-e2e-smoke-logs/
+            ${{ runner.temp }}/rustfs-e2e-smoke-list.json
+          if-no-files-found: warn
+
+      - name: Upload e2e smoke JUnit report
+        if: always()
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        with:
+          name: e2e-smoke-junit-${{ github.run_number }}
+          path: target/nextest/e2e-smoke/junit.xml
+          if-no-files-found: warn
 
       - name: Install s3s-e2e test tool
         uses: taiki-e/cache-cargo-install-action@7447f04c51f2ba27ca35e7f1e28fab848c5b3ba7 # v2
@@ -737,6 +770,32 @@ jobs:
           cache-save-if: 'false'
           install-build-packaging-tools: 'false'
 
+      - name: Set up Python
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
+        with:
+          python-version: "3.12"
+
+      - name: Install awscurl
+        run: |
+          python3 -m pip install --user --upgrade pip "awscurl==0.44"
+          echo "AWSCURL_PATH=$HOME/.local/bin/awscurl" >> "$GITHUB_ENV"
+
+      - name: Verify awscurl
+        run: test -x "$AWSCURL_PATH"
+
+      - name: Install Vault
+        run: |
+          VAULT_VERSION="1.17.6"
+          VAULT_ARCHIVE="vault_${VAULT_VERSION}_linux_amd64.zip"
+          curl -fsSLo "$RUNNER_TEMP/$VAULT_ARCHIVE" "https://releases.hashicorp.com/vault/${VAULT_VERSION}/${VAULT_ARCHIVE}"
+          echo "0cddc1fbbb88583b5ba5b845f9f8fae47c6fb39a6d48cd543c6ba6fd3ac1a669  $RUNNER_TEMP/$VAULT_ARCHIVE" | sha256sum --check --status
+          unzip -q "$RUNNER_TEMP/$VAULT_ARCHIVE" -d "$RUNNER_TEMP/vault-bin"
+          echo "RUSTFS_TEST_VAULT_BIN=$RUNNER_TEMP/vault-bin/vault" >> "$GITHUB_ENV"
+
+      - name: Verify Vault
+        run: |
+          "$RUSTFS_TEST_VAULT_BIN" version
+
       # Download after the cache restore so the freshly built binary from the
       # build job always wins over anything restored into target/debug.
       - name: Download debug binary

.github/workflows/minio-interop.yml

@@ -75,6 +75,7 @@ jobs:
       INTEROP_PACKAGE: rustfs
       INTEROP_FEATURES: rio-v2
       INTEROP_FILTER: "test(minio_generated_read_test::)"
+      INTEROP_REQUIRED_TESTS: '["reads_minio_generated_sse_s3_multipart_fixture", "reads_minio_generated_sse_kms_multipart_fixture", "rejects_minio_generated_sse_s3_fixture_with_wrong_kms_key", "rejects_minio_generated_sse_s3_fixture_with_truncated_ciphertext"]'
     steps:
       - name: Checkout repository
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
@@ -95,20 +96,23 @@ jobs:
       # is a perfectly valid filterset that matches zero tests, so the next
       # rename or module move would leave this job selecting nothing and
       # reporting success without executing a single interop assertion. Count
-      # the selection and fail with a reason instead.
+      # the selection and require every core reader test, while allowing new
+      # reader cases to be added without changing this guard.
       #
       # Count only `filter-match.status == "matches"`: the top-level
       # `test-count` in the JSON is the package total and ignores `-E` entirely.
       - name: Assert the interop selector still matches tests
         run: |
           set -euo pipefail
-          count="$(cargo nextest list --run-ignored all \
+          selection="$(cargo nextest list --run-ignored ignored-only \
             -p "$INTEROP_PACKAGE" --features "$INTEROP_FEATURES" \
             -E "$INTEROP_FILTER" --message-format json \
-            | python3 -c 'import json,sys; d=json.load(sys.stdin); print(sum(1 for s in d.get("rust-suites", {}).values() for t in s.get("testcases", {}).values() if t.get("filter-match", {}).get("status") == "matches"))')"
+            | python3 -c 'import json,os,sys; d=json.load(sys.stdin); required=json.loads(os.environ["INTEROP_REQUIRED_TESTS"]); matched=[name for suite in d.get("rust-suites", {}).values() for name,test in suite.get("testcases", {}).items() if test.get("filter-match", {}).get("status") == "matches"]; missing=[test for test in required if not any(name.endswith("minio_generated_read_test::" + test) for name in matched)]; print(len(matched)); print(",".join(missing))')"
+          count="$(printf '%s\n' "$selection" | sed -n '1p')"
+          missing="$(printf '%s\n' "$selection" | sed -n '2p')"
           echo "interop tests selected: ${count}"
-          if [ "${count}" -eq 0 ]; then
-            echo "::error::Selector '${INTEROP_FILTER}' in package '${INTEROP_PACKAGE}' matched 0 tests. The MinIO interop reader tests have moved or been renamed again; fix the selector instead of letting this job pass without running them. Context: rustfs/backlog#1638."
+          if [ -n "${missing}" ]; then
+            echo "::error::Selector '${INTEROP_FILTER}' in package '${INTEROP_PACKAGE}' is missing required tests: ${missing}. The MinIO interop reader tests have moved or been renamed; fix the selector instead of running an incomplete matrix. Context: rustfs/backlog#1638."
             exit 1
           fi
 

.github/workflows/package.yml

@@ -0,0 +1,463 @@
+# 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.
+
+# Package Workflow - Build DEB/RPM packages
+#
+# This workflow builds DEB and RPM packages from pre-built Linux binaries
+# and uploads them to Cloudflare R2.
+#
+# Trigger:
+# - release published: automatically package when a GitHub release is published
+# - workflow_dispatch: manual trigger with optional tag/run_id
+#
+# Flow:
+# 1. Find the Build workflow run for the release tag
+# 2. Download Linux binaries (x86_64-gnu, aarch64-gnu) from build artifacts
+# 3. Build DEB packages for amd64 and arm64
+# 4. Build RPM packages for x86_64 and aarch64
+# 5. Upload all packages to Cloudflare R2
+
+name: Package DEB/RPM
+
+permissions:
+  contents: read
+  actions: read
+
+on:
+  release:
+    types: [ published ]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Release tag to package (e.g. 1.0.0-beta.12). Leave empty for latest main build."
+        required: false
+        type: string
+      build_run_id:
+        description: "Build workflow run ID (overrides tag lookup)"
+        required: false
+        type: string
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.release.tag_name || github.event.inputs.tag || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  # Resolve which build run to use and extract version info
+  resolve:
+    name: Resolve Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    outputs:
+      version: ${{ steps.resolve.outputs.version }}
+      build_type: ${{ steps.resolve.outputs.build_type }}
+      build_run_id: ${{ steps.resolve.outputs.build_run_id }}
+      tag: ${{ steps.resolve.outputs.tag }}
+    steps:
+      - name: Resolve build run
+        id: resolve
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+          INPUT_TAG: ${{ github.event.inputs.tag }}
+          INPUT_RUN_ID: ${{ github.event.inputs.build_run_id }}
+        run: |
+          set -euo pipefail
+
+          # Determine tag
+          if [[ "${{ github.event_name }}" == "release" ]]; then
+            TAG="${{ github.event.release.tag_name }}"
+          elif [[ -n "$INPUT_TAG" ]]; then
+            TAG="$INPUT_TAG"
+          else
+            TAG=""
+          fi
+
+          echo "Tag: ${TAG:-<none>}"
+
+          # Determine build run ID
+          BUILD_RUN_ID=""
+
+          if [[ -n "$INPUT_RUN_ID" ]]; then
+            # Explicit run ID takes priority
+            BUILD_RUN_ID="$INPUT_RUN_ID"
+            echo "Using explicit build run ID: $BUILD_RUN_ID"
+
+          elif [[ -n "$TAG" ]]; then
+            # Find the build run that produced this tag
+            echo "Looking for build run for tag: $TAG"
+            BUILD_RUN_ID=$(gh api \
+              "repos/${{ github.repository }}/actions/workflows/build.yml/runs?branch=${TAG}&status=success&per_page=1" \
+              --jq '.workflow_runs[0].id' 2>/dev/null || echo "")
+
+            if [[ -z "$BUILD_RUN_ID" || "$BUILD_RUN_ID" == "null" ]]; then
+              # Tag might not be a branch; try event=push with head_branch matching
+              BUILD_RUN_ID=$(gh api \
+                "repos/${{ github.repository }}/actions/workflows/build.yml/runs?event=push&status=success&per_page=100" \
+                --jq ".workflow_runs[] | select(.head_branch == \"$TAG\") | .id" 2>/dev/null | head -1 || echo "")
+            fi
+
+            if [[ -z "$BUILD_RUN_ID" || "$BUILD_RUN_ID" == "null" ]]; then
+              echo "❌ No successful build run found for tag: $TAG"
+              exit 1
+            fi
+            echo "Found build run: $BUILD_RUN_ID"
+
+          else
+            # No tag — latest successful main build
+            echo "No tag specified, looking for latest main build"
+            BUILD_RUN_ID=$(gh api \
+              "repos/${{ github.repository }}/actions/workflows/build.yml/runs?branch=main&status=success&per_page=1" \
+              --jq '.workflow_runs[0].id' 2>/dev/null || echo "")
+
+            if [[ -z "$BUILD_RUN_ID" || "$BUILD_RUN_ID" == "null" ]]; then
+              echo "❌ No successful main build found"
+              exit 1
+            fi
+            echo "Latest main build: $BUILD_RUN_ID"
+          fi
+
+          # Determine version and build type
+          if [[ -n "$TAG" ]]; then
+            VERSION="$TAG"
+            if [[ "$TAG" == *"-preview"* ]]; then
+              BUILD_TYPE="preview"
+            elif [[ "$TAG" == *"alpha"* || "$TAG" == *"beta"* || "$TAG" == *"rc"* ]]; then
+              BUILD_TYPE="prerelease"
+            else
+              BUILD_TYPE="release"
+            fi
+          else
+            SHORT_SHA=$(gh api "repos/${{ github.repository }}/actions/runs/${BUILD_RUN_ID}" \
+              --jq '.head_sha' 2>/dev/null | head -c 7)
+            VERSION="dev-${SHORT_SHA}"
+            BUILD_TYPE="development"
+          fi
+
+          {
+            echo "version=$VERSION"
+            echo "build_type=$BUILD_TYPE"
+            echo "build_run_id=$BUILD_RUN_ID"
+            echo "tag=${TAG}"
+          } >> "$GITHUB_OUTPUT"
+
+          echo "📊 Resolved:"
+          echo "  Version: $VERSION"
+          echo "  Build type: $BUILD_TYPE"
+          echo "  Build run ID: $BUILD_RUN_ID"
+
+  # Build DEB and RPM packages for each architecture
+  package:
+    name: Package (${{ matrix.arch }})
+    needs: resolve
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x86_64
+            deb_arch: amd64
+            rpm_arch: x86_64
+            artifact_name: "rustfs-linux-x86_64-gnu"
+          - arch: aarch64
+            deb_arch: arm64
+            rpm_arch: aarch64
+            artifact_name: "rustfs-linux-aarch64-gnu"
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          persist-credentials: false
+
+      - name: Download binary artifact from build run
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7
+        with:
+          pattern: ${{ matrix.artifact_name }}*
+          path: ./binary-artifact
+          run-id: ${{ needs.resolve.outputs.build_run_id }}
+          github-token: ${{ github.token }}
+          merge-multiple: true
+
+      - name: Extract binary
+        id: binary
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          ZIP_FILE=$(find ./binary-artifact -name "*.zip" -type f | head -1)
+          if [[ -z "$ZIP_FILE" ]]; then
+            echo "❌ No binary artifact found"
+            ls -la ./binary-artifact/ || true
+            exit 1
+          fi
+
+          echo "Found artifact: $ZIP_FILE"
+
+          mkdir -p ./bin
+          unzip -o "$ZIP_FILE" -d ./bin
+
+          if [[ ! -f ./bin/rustfs ]]; then
+            echo "❌ rustfs binary not found in archive"
+            exit 1
+          fi
+
+          chmod +x ./bin/rustfs
+          ls -lh ./bin/rustfs
+          echo "✅ Binary extracted"
+
+      - name: Build DEB package
+        id: deb
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          VERSION="${{ needs.resolve.outputs.version }}"
+          DEB_ARCH="${{ matrix.deb_arch }}"
+          # DEB version: replace - with ~ (1.0.0-beta.12 -> 1.0.0~beta.12)
+          DEB_VERSION="${VERSION/-/~}"
+          PKG_DIR="rustfs_${DEB_VERSION}_${DEB_ARCH}"
+
+          echo "Building DEB: ${PKG_DIR}.deb"
+
+          mkdir -p "${PKG_DIR}/DEBIAN"
+          mkdir -p "${PKG_DIR}/usr/bin"
+          mkdir -p "${PKG_DIR}/etc/default"
+          mkdir -p "${PKG_DIR}/lib/systemd/system"
+          mkdir -p "${PKG_DIR}/usr/share/doc/rustfs"
+
+          cp ./bin/rustfs "${PKG_DIR}/usr/bin/"
+          chmod 755 "${PKG_DIR}/usr/bin/rustfs"
+
+          cp deploy/build/rustfs.service "${PKG_DIR}/lib/systemd/system/"
+
+          cat > "${PKG_DIR}/etc/default/rustfs" << 'ENVEOF'
+          # RustFS Environment Configuration
+          # See https://rustfs.com/docs/ for more information
+          # RUSTFS_VOLUMES=""
+          # RUSTFS_ROOT_USER=""
+          # RUSTFS_ROOT_PASSWORD=""
+          ENVEOF
+
+          cat > "${PKG_DIR}/DEBIAN/control" << EOF
+          Package: rustfs
+          Version: ${DEB_VERSION}
+          Section: utils
+          Priority: optional
+          Architecture: ${DEB_ARCH}
+          Depends: libc6 (>= 2.31)
+          Maintainer: RustFS Team <support@rustfs.com>
+          Description: High-performance distributed object storage
+           RustFS is a high-performance distributed object storage software
+           built using Rust. It is compatible with MinIO and S3 API.
+          Homepage: https://rustfs.com
+          EOF
+
+          cat > "${PKG_DIR}/DEBIAN/postinst" << 'POSTINST'
+          #!/bin/bash
+          set -e
+          if ! getent passwd rustfs > /dev/null 2>&1; then
+              useradd -r -s /bin/false -d /opt/rustfs rustfs
+          fi
+          mkdir -p /opt/rustfs /data/rustfs /var/log/rustfs
+          chown rustfs:rustfs /opt/rustfs /data/rustfs /var/log/rustfs
+          if [ -d /run/systemd/system ]; then
+              systemctl daemon-reload
+          fi
+          echo "RustFS installed. Configure /etc/default/rustfs then: systemctl start rustfs"
+          POSTINST
+          chmod 755 "${PKG_DIR}/DEBIAN/postinst"
+
+          cat > "${PKG_DIR}/DEBIAN/prerm" << 'PRERM'
+          #!/bin/bash
+          set -e
+          if [ -d /run/systemd/system ] && systemctl is-active --quiet rustfs; then
+              systemctl stop rustfs
+          fi
+          PRERM
+          chmod 755 "${PKG_DIR}/DEBIAN/prerm"
+
+          cat > "${PKG_DIR}/DEBIAN/postrm" << 'POSTRM'
+          #!/bin/bash
+          set -e
+          if [ -d /run/systemd/system ]; then
+              systemctl daemon-reload
+          fi
+          POSTRM
+          chmod 755 "${PKG_DIR}/DEBIAN/postrm"
+
+          cp LICENSE "${PKG_DIR}/usr/share/doc/rustfs/"
+          cp README.md "${PKG_DIR}/usr/share/doc/rustfs/"
+
+          fakeroot dpkg-deb --build "${PKG_DIR}"
+
+          DEB_FILE="${PKG_DIR}.deb"
+          ls -lh "$DEB_FILE"
+          echo "deb_file=$DEB_FILE" >> "$GITHUB_OUTPUT"
+          echo "✅ DEB built: $DEB_FILE"
+
+      - name: Build RPM package
+        id: rpm
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          VERSION="${{ needs.resolve.outputs.version }}"
+          RPM_ARCH="${{ matrix.rpm_arch }}"
+
+          echo "Building RPM for ${RPM_ARCH}"
+
+          sudo apt-get update && sudo apt-get install -y ruby ruby-dev build-essential
+          sudo gem install fpm
+
+          fpm -s dir -t rpm \
+            --name rustfs \
+            --version "$VERSION" \
+            --architecture "$RPM_ARCH" \
+            --depends "glibc >= 2.31" \
+            --maintainer "RustFS Team <support@rustfs.com>" \
+            --description "High-performance distributed object storage" \
+            --url "https://rustfs.com" \
+            --license "Apache-2.0" \
+            --after-install <(cat <<'POSTINST'
+          #!/bin/bash
+          set -e
+          if ! getent passwd rustfs > /dev/null 2>&1; then
+              useradd -r -s /bin/false -d /opt/rustfs rustfs
+          fi
+          mkdir -p /opt/rustfs /data/rustfs /var/log/rustfs
+          chown rustfs:rustfs /opt/rustfs /data/rustfs /var/log/rustfs
+          if [ -d /run/systemd/system ]; then
+              systemctl daemon-reload
+          fi
+          POSTINST
+            ) \
+            --before-remove <(cat <<'PRERM'
+          #!/bin/bash
+          set -e
+          if [ -d /run/systemd/system ] && systemctl is-active --quiet rustfs; then
+              systemctl stop rustfs
+          fi
+          PRERM
+            ) \
+            --after-remove <(cat <<'POSTRM'
+          #!/bin/bash
+          set -e
+          if [ -d /run/systemd/system ]; then
+              systemctl daemon-reload
+          fi
+          POSTRM
+            ) \
+            --config-files /etc/default/rustfs \
+            ./bin/rustfs=/usr/bin/rustfs \
+            deploy/build/rustfs.service=/lib/systemd/system/rustfs.service \
+            LICENSE=/usr/share/doc/rustfs/LICENSE \
+            README.md=/usr/share/doc/rustfs/README.md
+
+          RPM_FILE=$(ls -1 rustfs-*.rpm 2>/dev/null | head -1)
+          if [[ -z "$RPM_FILE" ]]; then
+            echo "❌ RPM build failed"
+            exit 1
+          fi
+
+          ls -lh "$RPM_FILE"
+          echo "rpm_file=$RPM_FILE" >> "$GITHUB_OUTPUT"
+          echo "✅ RPM built: $RPM_FILE"
+
+      - name: Upload packages to artifacts
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
+        with:
+          name: packages-${{ matrix.arch }}
+          path: |
+            *.deb
+            *.rpm
+          retention-days: 30
+
+      - name: Upload packages to Cloudflare R2
+        if: env.R2_ACCESS_KEY_ID != ''
+        env:
+          R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+          R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+          R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
+          R2_BUCKET: ${{ secrets.R2_BUCKET }}
+          AWS_EC2_METADATA_DISABLED: true
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          if [[ -z "$R2_ACCESS_KEY_ID" || -z "$R2_SECRET_ACCESS_KEY" || -z "$R2_ENDPOINT" || -z "$R2_BUCKET" ]]; then
+            echo "⚠️ R2 credentials missing, skipping upload"
+            exit 0
+          fi
+
+          if ! command -v aws >/dev/null 2>&1; then
+            sudo apt-get update && sudo apt-get install -y awscli
+          fi
+
+          export AWS_ACCESS_KEY_ID="$R2_ACCESS_KEY_ID"
+          export AWS_SECRET_ACCESS_KEY="$R2_SECRET_ACCESS_KEY"
+          export AWS_DEFAULT_REGION="auto"
+
+          BUILD_TYPE="${{ needs.resolve.outputs.build_type }}"
+          if [[ "$BUILD_TYPE" == "development" ]]; then
+            R2_PREFIX="artifacts/rustfs/packages/dev"
+          else
+            R2_PREFIX="artifacts/rustfs/packages/release"
+          fi
+          R2_PATH="s3://${R2_BUCKET}/${R2_PREFIX}/"
+
+          echo "📤 Uploading to $R2_PATH"
+
+          DEB_FILE="${{ steps.deb.outputs.deb_file }}"
+          RPM_FILE="${{ steps.rpm.outputs.rpm_file }}"
+
+          for f in "$DEB_FILE" "$RPM_FILE"; do
+            if [[ -n "$f" && -f "$f" ]]; then
+              echo "Uploading: $f"
+              aws s3 cp "$f" "$R2_PATH" --endpoint-url "$R2_ENDPOINT" --only-show-errors
+            fi
+          done
+
+          echo "✅ Upload complete"
+
+          # Also upload as latest for release/prerelease
+          if [[ "$BUILD_TYPE" == "release" || "$BUILD_TYPE" == "prerelease" ]]; then
+            LATEST_PATH="s3://${R2_BUCKET}/artifacts/rustfs/packages/latest/"
+            for f in "$DEB_FILE" "$RPM_FILE"; do
+              if [[ -n "$f" && -f "$f" ]]; then
+                echo "Uploading latest: $(basename "$f")"
+                aws s3 cp "$f" "$LATEST_PATH" --endpoint-url "$R2_ENDPOINT" --only-show-errors
+              fi
+            done
+            echo "✅ Latest packages updated"
+          fi
+
+  # Summary
+  summary:
+    name: Summary
+    needs: [ resolve, package ]
+    if: always()
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Print summary
+        shell: bash
+        run: |
+          echo "## 📦 Package Summary" >> "$GITHUB_STEP_SUMMARY"
+          echo "" >> "$GITHUB_STEP_SUMMARY"
+          echo "| Item | Value |" >> "$GITHUB_STEP_SUMMARY"
+          echo "|------|-------|" >> "$GITHUB_STEP_SUMMARY"
+          echo "| Version | \`${{ needs.resolve.outputs.version }}\` |" >> "$GITHUB_STEP_SUMMARY"
+          echo "| Build Type | ${{ needs.resolve.outputs.build_type }} |" >> "$GITHUB_STEP_SUMMARY"
+          echo "| Build Run | #${{ needs.resolve.outputs.build_run_id }} |" >> "$GITHUB_STEP_SUMMARY"
+          echo "| Package Status | ${{ needs.package.result }} |" >> "$GITHUB_STEP_SUMMARY"

.github/workflows/performance-ab.yml

@@ -17,10 +17,10 @@
 # Two entry points, honestly scoped:
 #   * schedule (nightly, on main): post-merge detection — catches a regression
 #     within 24h of landing, not before merge.
-#   * pull_request labeled `perf-ab`: opt-in pre-merge gate for a specific PR.
-# The `perf-deliberate-tradeoff` label runs the gate with --allow-regression so
-# a deliberate correctness cost (e.g. the #4221 fsync durability fix) is
-# recorded but does not block (rustfs/backlog#935 correction 1).
+#   * workflow_dispatch: an explicitly selected trusted ref.
+# The dispatch input can run the gate with --allow-regression so a deliberate
+# correctness cost (e.g. the #4221 fsync durability fix) is recorded, not
+# blocked (rustfs/backlog#935 correction 1).
 
 # DISABLED. This workflow is switched off in the repository's Actions settings
 # (state: disabled_manually) and does not run on any trigger, including its cron
@@ -46,8 +46,6 @@ on:
         required: false
         default: false
         type: boolean
-  pull_request:
-    types: [labeled, synchronize, reopened]
   push:
     # Every main commit pre-builds and caches its release binary (perf-3) so the
     # nightly A/B restores a ready baseline instead of paying the double build.
@@ -55,14 +53,6 @@ on:
 
 permissions:
   contents: read
-  pull-requests: write
-
-# Per-PR: a new push cancels the previous (up to 90-minute) A/B run instead of
-# stacking them. Nightly schedule and manual dispatch get a unique group and
-# always run to completion.
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.run_id }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 env:
   CARGO_TERM_COLOR: always
@@ -70,8 +60,8 @@ env:
 
 jobs:
   # perf-3: on every push to main, build the release binary once and cache it
-  # keyed by commit SHA (rustfs-baseline-<sha>). The nightly A/B (and, later, the
-  # perf-7 PR gate) restore this instead of paying the ~32min-per-side source
+  # keyed by commit SHA (rustfs-baseline-<sha>). The warp-ab measurements
+  # restore this instead of paying the ~32min-per-side source
   # build. That double build is what pushed the expanded 24-cell nightly past its
   # ceiling — 2026-07-11..07-14 all cancelled on the 120min timeout. Incremental
   # builds off the shared cargo cache keep each push cheap, and building on the
@@ -126,17 +116,11 @@ jobs:
 
   warp-ab:
     name: Warp A/B budget gate
-    # Always run on schedule / manual dispatch. Opt-in on PRs: only when the
-    # `perf-ab` label is present, and for `labeled` events only when the label
-    # being added is `perf-ab` itself (adding an unrelated label to an opted-in
-    # PR must not re-run the gate). Never on push — that event only feeds
-    # build-baseline-cache above.
+    # Always run on schedule / manual dispatch. Never on push — that event only
+    # feeds build-baseline-cache above.
     if: >-
       github.event_name == 'schedule' ||
-      github.event_name == 'workflow_dispatch' ||
-      (github.event_name == 'pull_request' &&
-       contains(github.event.pull_request.labels.*.name, 'perf-ab') &&
-       (github.event.action != 'labeled' || github.event.label.name == 'perf-ab'))
+      github.event_name == 'workflow_dispatch'
     runs-on: sm-standard-2
     # With perf-3's cached baseline binary the common (cache-hit) nightly is
     # measurement-only and finishes well under 50min. This ceiling stays
@@ -174,10 +158,6 @@ jobs:
           INPUT_ALLOW_REGRESSION: ${{ github.event.inputs.allow_regression }}
         run: |
           allow="false"
-          if [[ "${{ github.event_name }}" == "pull_request" ]] \
-            && ${{ contains(github.event.pull_request.labels.*.name, 'perf-deliberate-tradeoff') }}; then
-            allow="true"
-          fi
           if [[ "$INPUT_ALLOW_REGRESSION" == "true" ]]; then
             allow="true"
           fi
@@ -314,10 +294,10 @@ jobs:
           echo "candidate binary: $cand_src"
 
           if [[ "${{ steps.exempt.outputs.allow_regression }}" == "true" ]]; then
-            args+=(--allow-regression --exemption-reason "labeled perf-deliberate-tradeoff / dispatch override")
+            args+=(--allow-regression --exemption-reason "workflow dispatch override")
           fi
           # Do not let a gate FAIL abort the job here; capture status and surface
-          # it after the PR comment is posted.
+          # it after the step summary is written.
           set +e
           bash scripts/run_hotpath_warp_abba.sh "${args[@]}"
           echo "status=$?" >> "$GITHUB_OUTPUT"
@@ -382,13 +362,6 @@ jobs:
             fi
           } >> "$GITHUB_STEP_SUMMARY"
 
-      - name: Comment gate result on PR
-        if: always() && github.event_name == 'pull_request' && steps.ab.outputs.gate_md != ''
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          gh pr comment "${{ github.event.pull_request.number }}" --body-file "${{ steps.ab.outputs.gate_md }}"
-
       # Scheduled failure alerting is handled by the alert-on-failure job below
       # (perf-2 consuming ci-8's schedule-failure-issue composite action).
 
@@ -397,7 +370,7 @@ jobs:
         run: |
           status="${{ steps.ab.outputs.status }}"
           if [[ "$status" != "0" ]]; then
-            echo "::error::warp A/B budget gate failed (exit $status). See the step summary / PR comment / gate.md artifact." >&2
+            echo "::error::warp A/B budget gate failed (exit $status). See the step summary / gate.md artifact." >&2
             exit "$status"
           fi
           echo "warp A/B budget gate passed."
@@ -407,14 +380,12 @@ jobs:
     needs: [warp-ab]
     # `always()` is required: without it this job is skipped when a needed
     # job fails. Alerts only for scheduled (nightly) runs (backlog#1149
-    # ci-8); PR and manual dispatch failures are already watched by a human.
+    # ci-8); manual dispatch failures are already watched by a human.
     # `cancelled` is included alongside `failure` on purpose: a job that hits
     # timeout-minutes ends as `cancelled`, and the 2026-07-11..07-14 nightly
     # timeouts went silent precisely because the guard was failure-only. The
     # composite action already reports cancelled/timed-out jobs in the issue
-    # body. (Scheduled runs get a unique concurrency group with
-    # cancel-in-progress off, so a cancellation here means a timeout/manual
-    # abort, never a superseding run.)
+    # body.
     if: >-
       always() && github.event_name == 'schedule' &&
       (contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled'))

.github/workflows/windows-filesystem.yml

@@ -0,0 +1,86 @@
+# 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: Windows Filesystem Tests
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - "crates/ecstore/src/disk/**"
+      - "crates/ecstore/src/store/init_format.rs"
+      - "crates/ecstore/Cargo.toml"
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - ".github/actions/setup/**"
+      - ".github/workflows/windows-filesystem.yml"
+  pull_request:
+    branches: [ main ]
+    paths:
+      - "crates/ecstore/src/disk/**"
+      - "crates/ecstore/src/store/init_format.rs"
+      - "crates/ecstore/Cargo.toml"
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - ".github/actions/setup/**"
+      - ".github/workflows/windows-filesystem.yml"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+  RUST_BACKTRACE: 1
+
+jobs:
+  rename-safety:
+    name: Rename Safety
+    runs-on: windows-latest
+    timeout-minutes: 60
+    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
+          cache-shared-key: build-x86_64-pc-windows-msvc
+          cache-save-if: 'false'
+          install-build-packaging-tools: 'false'
+          install-test-tools: 'false'
+
+      - name: Test guarded rename publication
+        shell: pwsh
+        run: cargo test -p rustfs-ecstore --lib rename_all_ -- --nocapture
+
+      - name: Test Windows handle guards
+        shell: pwsh
+        run: cargo test -p rustfs-ecstore --lib windows_ -- --nocapture
+
+      - name: Test startup temporary-directory cleanup
+        shell: pwsh
+        run: cargo test -p rustfs-ecstore --lib cleanup_tmp_on_startup_ -- --nocapture
+
+      - name: Test fresh format publication
+        shell: pwsh
+        run: cargo test -p rustfs-ecstore --lib fresh_format_load_initializes_all_disks -- --nocapture

.gitignore

@@ -83,3 +83,7 @@ worktrees/*
 
 # Local AI-agent review artifacts (omo evidence dumps)
 .omo/
+
+# insta scratch files; the accepted .snap files ARE the assertions and are committed
+*.snap.new
+*.pending-snap

.mimocode/skills/issue-triage/SKILL.md

@@ -0,0 +1,116 @@
+---
+name: issue-triage
+description: Triage a GitHub issue — determine if it is already fixed, needs implementation, or should be closed. Searches related commits and PRs, verifies implementation status, and posts a triage comment or closes the issue. Use when the user provides an issue URL and asks whether it can be closed or needs work.
+---
+
+# Issue Triage
+
+Use this skill when the user provides a GitHub issue URL and asks "can this be closed?", "is this already implemented?", "check completion status", or similar triage questions.
+
+## Workflow
+
+### 1. Fetch issue context
+
+```bash
+gh issue view <N> --repo <owner/repo> --json title,body,state,comments,labels,updatedAt
+```
+
+Read the issue body to understand what was requested. Extract:
+- The specific feature/fix/behavior described.
+- Any linked PRs or commits mentioned in the body or comments.
+- Any checklist items or sub-issues.
+
+### 2. Search for related work
+
+Search git history for commits referencing the issue:
+```bash
+git log --oneline --all --grep="<N>" | head -30
+```
+
+Search for related PRs:
+```bash
+gh pr list --search "fixes #<N> OR closes #<N> OR #<N>" --state all --json number,title,state,mergedAt
+```
+
+If the issue mentions specific PRs, check their status:
+```bash
+gh pr view <PR_N> --json state,mergedAt,title
+```
+
+### 3. Verify implementation
+
+For each linked or related PR that is merged, verify the fix is actually present on the current main branch:
+```bash
+git log --oneline main | grep -i "<keyword>"
+# or
+git log --oneline main --grep="<PR_N>"
+```
+
+If the issue describes a specific defect, check the relevant code to confirm the fix is in place:
+```bash
+grep -n "<pattern>" crates/<relevant>/src/<file>.rs
+```
+
+For issues with checklists, verify each item individually. If sub-items are tracked as separate issues, check those too:
+```bash
+gh issue view <SUB_N> --repo <owner/repo> --json state
+```
+
+### 4. Determine verdict
+
+- **All items fixed and merged**: Close with a summary comment listing what was fixed and which PRs.
+- **Some items fixed, some remaining**: Comment with status of each item. Do not close.
+- **Not yet implemented**: Comment with a summary of what remains. Do not close.
+- **Superseded or no longer relevant**: Close with explanation.
+
+### 5. Take action
+
+Close with comment:
+```bash
+gh issue close <N> --repo <owner/repo> --comment "<body>"
+```
+
+Comment without closing:
+```bash
+gh issue comment <N> --repo <owner/repo> --body-file /tmp/triage.md
+```
+
+Update issue labels if needed:
+```bash
+gh issue edit <N> --repo <owner/repo> --add-label "completed" --remove-label "needs-triage"
+```
+
+Always use `--body-file` for multiline content, never inline `--body`.
+
+### 6. Handle multi-issue batches
+
+When the user asks to check multiple issues (e.g., "check all issues by user X" or "scan backlog for closable issues"):
+1. List the issues: `gh issue list --repo <repo> --author <user> --state open --json number,title,updatedAt`
+2. For each issue, run steps 1-5 above.
+3. Report a summary table of all triaged issues with verdicts.
+
+## Output format
+
+### Issue Triage: #<N> — <title>
+
+**State**: OPEN / CLOSED
+**Linked PRs**: <list with merge status>
+
+#### Assessment
+<what was requested vs what is implemented>
+
+#### Verdict
+- Close — all items resolved by <PR list>
+- Keep open — <remaining items>
+- Not started — <what needs to be done>
+
+#### Action taken
+- Closed with comment / Commented / No action
+
+## Notes
+
+- The user may ask in Chinese ("是否可以关闭", "检查完成情况"); respond in the same language.
+- When closing, always include a summary of what was fixed and which PRs resolved it — this creates a useful audit trail.
+- For issues in `rustfs/backlog`, use `--repo rustfs/backlog`.
+- For issues in `rustfs/rustfs`, use `--repo rustfs/rustfs`.
+- If the issue has sub-issues (GitHub sub-issues API), check each one's state before declaring the parent complete.

.mimocode/skills/pr-review/SKILL.md

@@ -0,0 +1,147 @@
+---
+name: pr-review
+description: Review a GitHub PR end-to-end from a URL or number — fetch metadata, inspect the diff, run multi-role adversarial review, check CI status, and post the review comment. Use when the user provides a PR link and asks to review it.
+---
+
+# PR Review
+
+Use this skill when the user provides a GitHub PR URL or number and asks to review it. This covers the full review lifecycle: data gathering, code review, CI verification, and posting the result.
+
+## Prerequisites
+
+- Read `AGENTS.md` for the repository's adversarial validation policy and change-style rules.
+- The `adversarial-validation` skill handles the review role playbooks; this skill orchestrates the workflow around it.
+
+## Workflow
+
+### 1. Gather PR context
+
+```bash
+gh pr view <N> --json title,author,state,body,additions,deletions,changedFiles,commits,baseRefName,headRefName
+gh pr diff <N> --name-only
+```
+
+Read the PR body and linked issues to understand the change's purpose. If the PR references an issue, fetch that too:
+```bash
+gh issue view <ISSUE> --json title,body,state
+```
+
+### 2. Fetch the diff and classify the change
+
+```bash
+git fetch origin pull/<N>/head:pr-<N>
+git diff main...pr-<N> --stat
+```
+
+Classify the change by risk tier (per AGENTS.md):
+- **Exempt**: docs/comments/instruction-only, formatting, typos.
+- **Mechanical**: renames, file moves, test-only or tooling changes.
+- **Standard** (default): any behavior change.
+- **High risk**: locking, erasure coding, quorum/heal, replication, multipart, RPC, lifecycle/tiering, metadata formats, persistence/fsync, IAM/KMS/auth, on-disk/on-wire formats, S3 API-visible behavior.
+
+### 3. Cluster changed files and delegate review
+
+Group the changed files into logical clusters (by crate or functional area). For each cluster, spawn a subagent with a focused review prompt that includes:
+- The cluster's changed files and their diffs.
+- The applicable adversarial role probes (from the `adversarial-validation` skill).
+- The repository's AGENTS.md rules relevant to that domain.
+
+For standard-tier changes: correctness adversary + simplicity adversary + test-coverage skeptic, plus every role whose domain the diff touches.
+For high-risk changes: run all seven roles.
+
+Each subagent must produce findings (concrete failure scenario with file:line) or a null report ("attacked X, Y, Z — no break found").
+
+### 4. Check CI status
+
+```bash
+gh pr checks <N>
+```
+
+If any checks fail, investigate:
+```bash
+gh run view --log-failed --job=<JOB_ID>
+```
+
+Determine whether failures are pre-existing (on main), flaky, or caused by the PR.
+
+### 5. Synthesize findings
+
+Combine all subagent findings into a structured review:
+- **Summary**: one-paragraph overview of the change and overall assessment.
+- **Findings**: each finding with severity (critical/major/minor/nit), file:line, concrete failure scenario, and suggested fix.
+- **CI status**: pass/fail with notes on any failures.
+- **Verdict**: APPROVE, REQUEST_CHANGES, or COMMENT.
+
+### 6. Post the review
+
+Write the review body to a temp file and post via CLI:
+```bash
+# Request changes
+gh pr review <N> --request-changes --body-file /tmp/pr_review.md
+
+# Approve
+gh pr review <N> --approve --body-file /tmp/pr_review.md
+
+# Comment only (no verdict)
+gh pr review <N> --comment --body-file /tmp/pr_review.md
+```
+
+For inline comments on specific lines, use the GitHub API:
+```bash
+cat > /tmp/pr_review.json <<'EOF'
+{
+  "body": "review body",
+  "event": "REQUEST_CHANGES",
+  "comments": [
+    {
+      "path": "crates/foo/src/bar.rs",
+      "line": 42,
+      "body": "finding description"
+    }
+  ]
+}
+EOF
+gh api --method POST /repos/{owner}/{repo}/pulls/<N>/reviews --input /tmp/pr_review.json
+```
+
+Always use `--body-file` or `--input`, never inline multiline `--body`.
+
+### 7. Handle follow-up
+
+If the review requests changes:
+- Monitor for new commits: `gh pr view <N> --json commits`
+- Re-review changed files only: `git diff pr-<N>..origin/pull/<N>/head`
+- Update the review when findings are addressed.
+
+If CI was failing due to pre-existing main breakage:
+- Comment on the PR noting the failure is pre-existing.
+- Suggest updating the branch: `gh pr update-branch <N>`
+
+## Output format
+
+### PR Review: #<N> — <title>
+
+**Author**: <author>
+**Risk tier**: exempt | mechanical | standard | high-risk
+**Changed files**: <count> across <cluster count> clusters
+
+#### Summary
+<one-paragraph overview>
+
+#### Findings
+| Severity | Location | Finding |
+|----------|----------|---------|
+| critical | file:line | concrete failure scenario |
+
+#### CI Status
+- All checks pass / Failing: <details>
+
+#### Verdict
+APPROVE / REQUEST_CHANGES / COMMENT
+
+## Notes
+
+- The user may ask for review in Chinese; respond in the same language but keep the review body in English per AGENTS.md rules.
+- When the user asks for "多角色对抗 review", run the full adversarial validation protocol — this skill's step 3 covers that.
+- If the PR is from a fork, check `maintainerCanModify` before attempting to push fixes.
+- For very large PRs (>50 files), cluster aggressively and delegate in parallel to keep review time reasonable.

AGENTS.md

@@ -322,6 +322,28 @@ High risk: all seven roles.
 - Use environment variables or vault tooling for sensitive configuration.
 - For localhost-sensitive tests, verify proxy settings to avoid traffic leakage.
 
+## Logging
+
+Applies to **every** `tracing` macro you add or edit, including a single line
+added in passing while fixing something else — not only to log-focused changes.
+
+- Fields first, message second: `event`, `component`, `subsystem`,
+  `result`/`state`, then key context. The message is a short label, not a
+  sentence with values interpolated into it.
+- Reuse the existing `EVENT_*` / `LOG_COMPONENT_*` / `LOG_SUBSYSTEM_*`
+  constants of the module you are editing; match the shape of the log sites
+  already in that file rather than introducing a second style next to them.
+- Level policy: `error` for behavior/security-affecting failures, `warn` for
+  degraded or fallback paths, `info` for low-frequency lifecycle, `debug` for
+  targeted diagnostics, `trace` for hot paths. Per-object and per-request
+  success paths are `trace`.
+- Never log secrets, tokens, credential payloads, or merged config dumps.
+- `scripts/check_logging_guardrails.sh` enforces a subset of this on the files
+  it lists; passing it is a floor, not evidence the log matches the house style.
+
+See `.agents/skills/rustfs-logging-governance/SKILL.md` for the full event
+model, level policy, and guardrail-update checklist.
+
 ## Tools
 
 ### xl.meta decode tool Quick Use
@@ -347,6 +369,11 @@ cargo run -p rustfs-filemeta --example dump_fileinfo -- "/path/to/file/xl.meta"
   absent, empty, and nil all mean "no value", never `Uuid::nil()`.
 - A remote-tier version of `None`/`""` means the tier bucket is unversioned:
   send **no** `versionId` on tier GET/DELETE.
+- Structs persisted in the scanner data-usage cache (`DataUsageCacheInfo`,
+  `DataUsageEntry`) carry a hand-written map-encoded `Serialize`. MessagePack
+  encodes derived structs as arrays, where an appended field makes the whole
+  cache a decode error for older readers — keep new fields `#[serde(default)]`
+  and keep the map encoding rather than reverting to `derive(Serialize)`.
 
 ## Naming Conventions
 

Cargo.toml

@@ -69,7 +69,7 @@ edition = "2024"
 license = "Apache-2.0"
 repository = "https://github.com/rustfs/rustfs"
 rust-version = "1.97.1"
-version = "1.0.0-beta.12"
+version = "1.0.0-rc.1"
 homepage = "https://rustfs.com"
 description = "RustFS is a high-performance distributed object storage software built using Rust, one of the most popular languages worldwide. "
 keywords = ["RustFS", "Minio", "object-storage", "filesystem", "s3"]
@@ -86,52 +86,52 @@ redundant_clone = "warn"
 
 [workspace.dependencies]
 # RustFS Internal Crates
-rustfs = { path = "./rustfs", version = "1.0.0-beta.12" }
-rustfs-heal = { path = "crates/heal", version = "1.0.0-beta.12" }
-rustfs-audit = { path = "crates/audit", version = "1.0.0-beta.12" }
-rustfs-checksums = { path = "crates/checksums", version = "1.0.0-beta.12" }
-rustfs-common = { path = "crates/common", version = "1.0.0-beta.12" }
-rustfs-data-usage = { path = "crates/data-usage", version = "1.0.0-beta.12" }
-rustfs-config = { path = "./crates/config", version = "1.0.0-beta.12" }
-rustfs-concurrency = { path = "./crates/concurrency", version = "1.0.0-beta.12" }
-rustfs-credentials = { path = "crates/credentials", version = "1.0.0-beta.12" }
-rustfs-crypto = { path = "crates/crypto", version = "1.0.0-beta.12" }
-rustfs-ecstore = { path = "crates/ecstore", version = "1.0.0-beta.12" }
-rustfs-filemeta = { path = "crates/filemeta", version = "1.0.0-beta.12" }
-rustfs-iam = { path = "crates/iam", version = "1.0.0-beta.12" }
-rustfs-keystone = { path = "crates/keystone", version = "1.0.0-beta.12" }
-rustfs-lifecycle = { path = "crates/lifecycle", version = "1.0.0-beta.12" }
-rustfs-kms = { path = "crates/kms", version = "1.0.0-beta.12" }
-rustfs-lock = { path = "crates/lock", version = "1.0.0-beta.12" }
-rustfs-madmin = { path = "crates/madmin", version = "1.0.0-beta.12" }
-rustfs-notify = { path = "crates/notify", version = "1.0.0-beta.12" }
-rustfs-io-metrics = { path = "crates/io-metrics", version = "1.0.0-beta.12" }
-rustfs-io-core = { path = "crates/io-core", version = "1.0.0-beta.12" }
-rustfs-object-capacity = { path = "crates/object-capacity", version = "1.0.0-beta.12" }
-rustfs-object-data-cache = { path = "crates/object-data-cache", version = "1.0.0-beta.12" }
-rustfs-log-analyzer = { path = "crates/log-analyzer", version = "1.0.0-beta.12" }
-rustfs-obs = { path = "crates/obs", version = "1.0.0-beta.12" }
-rustfs-policy = { path = "crates/policy", version = "1.0.0-beta.12" }
-rustfs-protos = { path = "crates/protos", version = "1.0.0-beta.12" }
-rustfs-protocols = { path = "crates/protocols", version = "1.0.0-beta.12" }
-rustfs-replication = { path = "crates/replication", version = "1.0.0-beta.12" }
-rustfs-rio = { path = "crates/rio", version = "1.0.0-beta.12" }
-rustfs-rio-v2 = { path = "crates/rio-v2", version = "1.0.0-beta.12" }
-rustfs-s3-types = { path = "crates/s3-types", version = "1.0.0-beta.12" }
-rustfs-s3-ops = { path = "crates/s3-ops", version = "1.0.0-beta.12" }
-rustfs-s3select-api = { path = "crates/s3select-api", version = "1.0.0-beta.12" }
-rustfs-s3select-query = { path = "crates/s3select-query", version = "1.0.0-beta.12" }
-rustfs-scanner = { path = "crates/scanner", version = "1.0.0-beta.12" }
-rustfs-security-governance = { path = "crates/security-governance", version = "1.0.0-beta.12" }
-rustfs-extension-schema = { path = "crates/extension-schema", version = "1.0.0-beta.12" }
-rustfs-signer = { path = "crates/signer", version = "1.0.0-beta.12" }
-rustfs-storage-api = { path = "crates/storage-api", version = "1.0.0-beta.12" }
-rustfs-trusted-proxies = { path = "crates/trusted-proxies", version = "1.0.0-beta.12" }
-rustfs-targets = { path = "crates/targets", version = "1.0.0-beta.12" }
-rustfs-test-utils = { path = "crates/test-utils", version = "1.0.0-beta.12" }
-rustfs-tls-runtime = { path = "crates/tls-runtime", version = "1.0.0-beta.12" }
-rustfs-utils = { path = "crates/utils", version = "1.0.0-beta.12" }
-rustfs-zip = { path = "./crates/zip", version = "1.0.0-beta.12" }
+rustfs = { path = "./rustfs", version = "1.0.0-rc.1" }
+rustfs-heal = { path = "crates/heal", version = "1.0.0-rc.1" }
+rustfs-audit = { path = "crates/audit", version = "1.0.0-rc.1" }
+rustfs-checksums = { path = "crates/checksums", version = "1.0.0-rc.1" }
+rustfs-common = { path = "crates/common", version = "1.0.0-rc.1" }
+rustfs-data-usage = { path = "crates/data-usage", version = "1.0.0-rc.1" }
+rustfs-config = { path = "./crates/config", version = "1.0.0-rc.1" }
+rustfs-concurrency = { path = "./crates/concurrency", version = "1.0.0-rc.1" }
+rustfs-credentials = { path = "crates/credentials", version = "1.0.0-rc.1" }
+rustfs-crypto = { path = "crates/crypto", version = "1.0.0-rc.1" }
+rustfs-ecstore = { path = "crates/ecstore", version = "1.0.0-rc.1" }
+rustfs-filemeta = { path = "crates/filemeta", version = "1.0.0-rc.1" }
+rustfs-iam = { path = "crates/iam", version = "1.0.0-rc.1" }
+rustfs-keystone = { path = "crates/keystone", version = "1.0.0-rc.1" }
+rustfs-lifecycle = { path = "crates/lifecycle", version = "1.0.0-rc.1" }
+rustfs-kms = { path = "crates/kms", version = "1.0.0-rc.1" }
+rustfs-lock = { path = "crates/lock", version = "1.0.0-rc.1" }
+rustfs-madmin = { path = "crates/madmin", version = "1.0.0-rc.1" }
+rustfs-notify = { path = "crates/notify", version = "1.0.0-rc.1" }
+rustfs-io-metrics = { path = "crates/io-metrics", version = "1.0.0-rc.1" }
+rustfs-io-core = { path = "crates/io-core", version = "1.0.0-rc.1" }
+rustfs-object-capacity = { path = "crates/object-capacity", version = "1.0.0-rc.1" }
+rustfs-object-data-cache = { path = "crates/object-data-cache", version = "1.0.0-rc.1", default-features = false }
+rustfs-log-analyzer = { path = "crates/log-analyzer", version = "1.0.0-rc.1" }
+rustfs-obs = { path = "crates/obs", version = "1.0.0-rc.1" }
+rustfs-policy = { path = "crates/policy", version = "1.0.0-rc.1" }
+rustfs-protos = { path = "crates/protos", version = "1.0.0-rc.1" }
+rustfs-protocols = { path = "crates/protocols", version = "1.0.0-rc.1" }
+rustfs-replication = { path = "crates/replication", version = "1.0.0-rc.1" }
+rustfs-rio = { path = "crates/rio", version = "1.0.0-rc.1" }
+rustfs-rio-v2 = { path = "crates/rio-v2", version = "1.0.0-rc.1" }
+rustfs-s3-types = { path = "crates/s3-types", version = "1.0.0-rc.1" }
+rustfs-s3-ops = { path = "crates/s3-ops", version = "1.0.0-rc.1" }
+rustfs-s3select-api = { path = "crates/s3select-api", version = "1.0.0-rc.1" }
+rustfs-s3select-query = { path = "crates/s3select-query", version = "1.0.0-rc.1" }
+rustfs-scanner = { path = "crates/scanner", version = "1.0.0-rc.1" }
+rustfs-security-governance = { path = "crates/security-governance", version = "1.0.0-rc.1" }
+rustfs-extension-schema = { path = "crates/extension-schema", version = "1.0.0-rc.1" }
+rustfs-signer = { path = "crates/signer", version = "1.0.0-rc.1" }
+rustfs-storage-api = { path = "crates/storage-api", version = "1.0.0-rc.1" }
+rustfs-trusted-proxies = { path = "crates/trusted-proxies", version = "1.0.0-rc.1" }
+rustfs-targets = { path = "crates/targets", version = "1.0.0-rc.1" }
+rustfs-test-utils = { path = "crates/test-utils", version = "1.0.0-rc.1" }
+rustfs-tls-runtime = { path = "crates/tls-runtime", version = "1.0.0-rc.1" }
+rustfs-utils = { path = "crates/utils", version = "1.0.0-rc.1" }
+rustfs-zip = { path = "./crates/zip", version = "1.0.0-rc.1" }
 
 # Async Runtime and Networking
 async-channel = "2.5.0"
@@ -173,7 +173,7 @@ tower-http = { version = "0.7.0" }
 # Serialization and Data Formats
 apache-avro = "0.21.0"
 bytes = { version = "1.12.1" }
-bytesize = "2.6.0"
+bytesize = "2.7.0"
 byteorder = "1.5.0"
 flatbuffers = "25.12.19"
 form_urlencoded = "1.2.2"
@@ -212,7 +212,7 @@ zeroize = { version = "1.9.0" }
 chrono = { version = "0.4.45" }
 humantime = "2.4.0"
 jiff = { version = "0.2.35" }
-time = { version = "0.3.54" }
+time = { version = "0.3.55" }
 
 # Database
 deadpool-postgres = { version = "0.14" }
@@ -228,15 +228,15 @@ atomic_enum = "0.3.0"
 aws-config = { version = "1.10.1" }
 aws-credential-types = { version = "1.3.0" }
 aws-sdk-kms = { default-features = false, version = "1.114.0" }
-aws-sdk-s3 = { default-features = false, version = "1.140.0" }
+aws-sdk-s3 = { default-features = false, version = "1.141.0" }
 aws-sdk-sts = { default-features = false, version = "1.110.0" }
 aws-smithy-http-client = { default-features = false, version = "1.2.0" }
 aws-smithy-runtime-api = { version = "1.14.0" }
 aws-smithy-types = { version = "1.6.1" }
-base64 = "0.23.0"
+base64 = "0.23.1"
 base64-simd = "0.8.0"
 brotli = "8.0.4"
-clap = { version = "4.6.5" }
+clap = { version = "4.6.6" }
 const-str = { version = "1.1.0" }
 convert_case = "0.11.0"
 criterion = { version = "0.8" }
@@ -244,7 +244,7 @@ crossbeam-queue = "0.3.13"
 crossbeam-channel = "0.5.16"
 crossbeam-deque = "0.8.7"
 crossbeam-utils = "0.8.22"
-datafusion = { default-features = false, git = "https://github.com/apache/datafusion.git", rev = "dae03ee062b2abf986de8df12ea82fb1578a2d99" }
+datafusion = { default-features = false, git = "https://github.com/apache/datafusion.git", rev = "e08aed1e5de41dcf81d529140dae07723b942a5e" }
 #datafusion = { default-features = false, version = "54.1.0" }
 derive_builder = "0.20.2"
 enumset = "1.1.14"
@@ -274,7 +274,6 @@ num_cpus = { version = "1.17.0" }
 nvml-wrapper = "0.12.1"
 parking_lot = "0.12.5"
 path-absolutize = "4.0.1"
-path-clean = "1.0.1"
 percent-encoding = "2.3.2"
 pin-project-lite = "0.2.17"
 pretty_assertions = "1.4.1"
@@ -342,15 +341,15 @@ unftp-core = "0.1.0"
 suppaftp = { version = "10.0.1" }
 rcgen = { version = "0.14.8", default-features = false, features = ["aws_lc_rs", "crypto", "pem"] }
 russh = { version = "0.62.5" }
-russh-sftp = "2.3.0"
+russh-sftp = "2.4.0"
 
 # WebDAV
 dav-server = "0.11.0"
 
 # Performance Analysis and Memory Profiling
-mimalloc = { version = "0.1.52", git = "https://github.com/xonatius/mimalloc_rust.git", rev = "1cdadea43e9c5a0f054b65be21200ce580e4eb13" }
-libmimalloc-sys = { version = "0.1.49", git = "https://github.com/xonatius/mimalloc_rust.git", rev = "1cdadea43e9c5a0f054b65be21200ce580e4eb13", features = ["extended"] }
-hotpath = { version = "0.22.0", default-features = false }
+mimalloc = { version = "0.1.52", git = "https://github.com/xonatius/mimalloc_rust.git", rev = "ce6338661179c8be22e516b00af7483f151485a7" }
+libmimalloc-sys = { version = "0.1.49", git = "https://github.com/xonatius/mimalloc_rust.git", rev = "ce6338661179c8be22e516b00af7483f151485a7", features = ["extended"] }
+hotpath = { version = "0.23.1", default-features = false }
 # Snapshot testing for output format regression detection
 insta = { version = "1.48" }
 

README.md

@@ -116,7 +116,7 @@ chown -R 10001:10001 data logs
 docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:latest
 
 # Using specific version
-docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-beta.12
+docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-rc.1
 ```
 
 If you use [podman](https://github.com/containers/podman) instead of docker, you can install the RustFS with the below command

README_ZH.md

@@ -113,7 +113,7 @@ chown -R 10001:10001 data logs
 docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:latest
 
 # 使用指定版本运行
-docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-beta.12
+docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-rc.1
 ```
 
 如果您通过绑定挂载启用 TLS 证书目录，也请用同样方式准备该目录：

crates/audit/Cargo.toml

@@ -55,10 +55,10 @@ hotpath.workspace = true
 rustfs-targets = { workspace = true }
 rustfs-config = { workspace = true, features = ["audit", "server-config-model"] }
 rustfs-s3-types = { workspace = true }
-chrono = { workspace = true, features = ["serde"] }
 const-str = { workspace = true, features = ["std", "proc"] }
 futures = { workspace = true }
 hashbrown = { workspace = true, features = ["serde", "rayon"] }
+jiff = { workspace = true, features = ["serde"] }
 metrics = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["raw_value"] }

crates/audit/src/entity.rs

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use chrono::{DateTime, Utc};
 use hashbrown::HashMap;
+use jiff::Timestamp;
 use rustfs_s3_types::EventName;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
@@ -151,8 +151,8 @@ pub struct AuditEntry {
     pub deployment_id: Option<String>,
     #[serde(rename = "siteName", skip_serializing_if = "Option::is_none")]
     pub site_name: Option<String>,
-    #[serde(with = "chrono::serde::ts_milliseconds")]
-    pub time: DateTime<Utc>,
+    #[serde(with = "jiff::fmt::serde::timestamp::millisecond::required")]
+    pub time: Timestamp,
     pub event: EventName,
     #[serde(rename = "type", skip_serializing_if = "Option::is_none")]
     pub entry_type: Option<String>,
@@ -198,7 +198,7 @@ impl AuditEntryBuilder {
     pub fn new(version: impl Into<String>, event: EventName, trigger: impl Into<String>, api: ApiDetails) -> Self {
         Self(AuditEntry {
             version: version.into(),
-            time: Utc::now(),
+            time: Timestamp::now(),
             event,
             trigger: trigger.into(),
             api,
@@ -232,7 +232,7 @@ impl AuditEntryBuilder {
         self
     }
 
-    pub fn time(mut self, time: DateTime<Utc>) -> Self {
+    pub fn time(mut self, time: Timestamp) -> Self {
         self.0.time = time;
         self
     }
@@ -342,4 +342,23 @@ mod tests {
         assert_eq!(value["requestID"], Value::String("req-audit-123".to_string()));
         assert!(value.get("request_id").is_none(), "historical audit contract must not expose request_id");
     }
+
+    #[test]
+    fn audit_entry_time_serializes_as_epoch_milliseconds() {
+        let entry = AuditEntryBuilder::new(
+            "1",
+            EventName::ObjectCreatedPut,
+            "s3",
+            ApiDetailsBuilder::new()
+                .name("PutObject")
+                .status("OK")
+                .status_code(200)
+                .build(),
+        )
+        .time(Timestamp::from_millisecond(1_711_423_698_870).expect("timestamp should be valid"))
+        .build();
+
+        let value = serde_json::to_value(entry).expect("audit entry should serialize");
+        assert_eq!(value["time"], Value::Number(1_711_423_698_870_i64.into()));
+    }
 }

crates/audit/tests/performance_test.rs

@@ -97,7 +97,7 @@ async fn test_audit_log_dispatch_performance() {
         return; // Alternatively: assert!(false, "AuditSystem failed to start");
     }
 
-    use chrono::Utc;
+    use jiff::Timestamp;
     use rustfs_targets::EventName;
     use serde_json::json;
     use std::collections::HashMap;
@@ -136,7 +136,7 @@ async fn test_audit_log_dispatch_performance() {
         version: "1".to_string(),
         deployment_id: Some(format!("test-deployment-{id}")),
         site_name: Some("test-site".to_string()),
-        time: Utc::now(),
+        time: Timestamp::now(),
         event: EventName::ObjectCreatedPut,
         entry_type: Some("object".to_string()),
         trigger: "api".to_string(),
@@ -298,7 +298,7 @@ fn test_performance_requirements() {
     for i in 0..3000 {
         // Simulate event name parsing and processing
         let _event_id = format!("s3:ObjectCreated:Put_{i}");
-        let _timestamp = chrono::Utc::now().to_rfc3339();
+        let _timestamp = jiff::Timestamp::now().to_string();
 
         // Simulate basic audit entry creation overhead
         let _entry_size = 512; // bytes

crates/audit/tests/system_integration_test.rs

@@ -264,7 +264,7 @@ fn create_sample_audit_entry() -> AuditEntry {
 }
 
 fn create_sample_audit_entry_with_id(id: u32) -> AuditEntry {
-    use chrono::Utc;
+    use jiff::Timestamp;
     use rustfs_targets::EventName;
     use serde_json::json;
 
@@ -301,7 +301,7 @@ fn create_sample_audit_entry_with_id(id: u32) -> AuditEntry {
         version: "1".to_string(),
         deployment_id: Some(format!("test-deployment-{id}")),
         site_name: Some("test-site".to_string()),
-        time: Utc::now(),
+        time: Timestamp::now(),
         event: EventName::ObjectCreatedPut,
         entry_type: Some("object".to_string()),
         trigger: "api".to_string(),

crates/common/Cargo.toml

@@ -39,11 +39,15 @@ tokio = { workspace = true, features = ["fs", "rt-multi-thread"] }
 tonic = { workspace = true, features = ["gzip", "deflate"] }
 uuid = { workspace = true, features = ["v4", "fast-rng", "macro-diagnostics"] }
 chrono = { workspace = true, features = ["serde"] }
+jiff = { workspace = true, features = ["serde"] }
 metrics = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 rmp-serde = { workspace = true }
 s3s = { workspace = true, features = ["minio"] }
 tracing = { workspace = true }
 
+[dev-dependencies]
+serde_json = { workspace = true }
+
 [lib]
 doctest = false

crates/common/src/heal_channel.rs

@@ -356,6 +356,8 @@ pub struct HealChannelRequest {
     pub recursive: Option<bool>,
     /// Whether to dry run
     pub dry_run: Option<bool>,
+    /// Whether to skip namespace locking
+    pub no_lock: Option<bool>,
     /// Timeout in seconds (optional)
     pub timeout_seconds: Option<u64>,
     /// Origin of the request for operational status and queue accounting
@@ -560,6 +562,7 @@ pub fn create_heal_request(
         update_parity: None,
         recursive: None,
         dry_run: None,
+        no_lock: None,
         timeout_seconds: None,
         source: HealRequestSource::Internal,
         disk: None,
@@ -718,6 +721,7 @@ pub async fn send_heal_disk(set_disk_id: String, priority: Option<HealChannelPri
         update_parity: None,
         recursive: None,
         dry_run: None,
+        no_lock: None,
         timeout_seconds: None,
         source: HealRequestSource::AutoHeal,
     };

crates/common/src/metrics.rs

@@ -15,9 +15,10 @@
 use crate::heal_channel::HealScanMode;
 use crate::last_minute::{AccElem, LastMinuteLatency};
 use chrono::{DateTime, Utc};
+use jiff::Timestamp;
 use serde::{Deserialize, Serialize};
 use std::{
-    collections::HashMap,
+    collections::{BTreeSet, HashMap},
     fmt::Display,
     future::Future,
     pin::Pin,
@@ -669,7 +670,7 @@ impl LockedLastMinuteLatency {
 #[derive(Clone, Debug)]
 struct CurrentPathState {
     path: String,
-    updated_at: DateTime<Utc>,
+    updated_at: Timestamp,
 }
 
 struct CurrentPathTracker {
@@ -678,10 +679,10 @@ struct CurrentPathTracker {
 
 impl CurrentPathTracker {
     fn new(initial_path: String) -> Self {
-        Self::new_at(initial_path, Utc::now())
+        Self::new_at(initial_path, Timestamp::now())
     }
 
-    fn new_at(initial_path: String, updated_at: DateTime<Utc>) -> Self {
+    fn new_at(initial_path: String, updated_at: Timestamp) -> Self {
         Self {
             state: Arc::new(RwLock::new(CurrentPathState {
                 path: initial_path,
@@ -693,7 +694,7 @@ impl CurrentPathTracker {
     async fn update_path(&self, path: String) {
         let mut state = self.state.write().await;
         state.path = path;
-        state.updated_at = Utc::now();
+        state.updated_at = Timestamp::now();
     }
 
     async fn get_state(&self) -> CurrentPathState {
@@ -701,6 +702,36 @@ impl CurrentPathTracker {
     }
 }
 
+fn chrono_to_jiff_timestamp(dt: DateTime<Utc>) -> Timestamp {
+    let seconds = dt.timestamp();
+    let nanoseconds = match i32::try_from(dt.timestamp_subsec_nanos()) {
+        Ok(nanoseconds) => nanoseconds,
+        Err(_) => {
+            return if seconds < 0 { Timestamp::MIN } else { Timestamp::MAX };
+        }
+    };
+
+    match Timestamp::new(seconds, nanoseconds) {
+        Ok(timestamp) => timestamp,
+        Err(_) => {
+            if seconds < 0 {
+                Timestamp::MIN
+            } else {
+                Timestamp::MAX
+            }
+        }
+    }
+}
+
+fn timestamp_elapsed_seconds_since(now: Timestamp, earlier: Timestamp) -> u64 {
+    let duration = now.duration_since(earlier);
+    if duration.is_negative() {
+        return 0;
+    }
+
+    u64::try_from(duration.as_secs()).map_or(u64::MAX, |seconds| seconds)
+}
+
 #[derive(Clone, Copy, Debug, Default)]
 struct ScannerDiskBucketScanState {
     concurrency_limit: u64,
@@ -708,6 +739,48 @@ struct ScannerDiskBucketScanState {
     active: u64,
 }
 
+type ScannerDiskBucketScanKey = (String, String);
+
+#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
+pub struct ScannerDiskBucketScanSnapshot {
+    pub pool: String,
+    pub set: String,
+    pub concurrency_limit: u64,
+    pub queued: u64,
+    pub active: u64,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+struct ScannerBucketDriveResultKey {
+    bucket: String,
+    drive: String,
+    result: String,
+}
+
+impl ScannerBucketDriveResultKey {
+    fn new(bucket: impl Into<String>, drive: impl Into<String>, result: impl Into<String>) -> Self {
+        Self {
+            bucket: bucket.into(),
+            drive: drive.into(),
+            result: result.into(),
+        }
+    }
+}
+
+const MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS: usize = 4096;
+
+#[derive(Debug, Default)]
+struct ScannerBucketDriveResults {
+    counts: HashMap<ScannerBucketDriveResultKey, ScannerBucketDriveResultValue>,
+    eviction_index: BTreeSet<(u64, ScannerBucketDriveResultKey)>,
+}
+
+#[derive(Clone, Copy, Debug)]
+struct ScannerBucketDriveResultValue {
+    count: u64,
+    last_seen: u64,
+}
+
 // ---------------------------------------------------------------------------
 // Metrics
 // ---------------------------------------------------------------------------
@@ -738,7 +811,11 @@ pub struct Metrics {
     scanner_set_scan_concurrency_limit: AtomicU64,
     scanner_set_scans_queued: AtomicU64,
     scanner_set_scans_active: AtomicU64,
-    scanner_disk_bucket_scan_states: Mutex<HashMap<String, ScannerDiskBucketScanState>>,
+    scanner_disk_bucket_scan_states: Mutex<HashMap<ScannerDiskBucketScanKey, ScannerDiskBucketScanState>>,
+    scanner_bucket_drive_results: Mutex<ScannerBucketDriveResults>,
+    scanner_bucket_drive_result_clock: AtomicU64,
+    current_scan_cycle_bucket_drive_results_start: Mutex<HashMap<ScannerBucketDriveResultKey, u64>>,
+    last_scan_cycle_bucket_drive_results: Mutex<Vec<ScannerBucketDriveResultSnapshot>>,
     scanner_leader_lock_state: RwLock<String>,
     scanner_leader_lock_held: AtomicBool,
     scanner_leader_lock_last_error: RwLock<String>,
@@ -958,6 +1035,14 @@ pub struct ScannerSourceWorkSnapshot {
     pub missed: u64,
 }
 
+#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
+pub struct ScannerBucketDriveResultSnapshot {
+    pub bucket: String,
+    pub drive: String,
+    pub result: String,
+    pub count: u64,
+}
+
 #[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
 pub struct ScannerReplicationRepairSnapshot {
     pub source: String,
@@ -1112,12 +1197,12 @@ pub struct ScannerLastMinute {
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize)]
 pub struct ScannerMetricsReport {
-    pub collected_at: DateTime<Utc>,
+    pub collected_at: Timestamp,
     pub current_cycle: u64,
     #[serde(default)]
     pub current_cycle_active: bool,
-    pub current_started: DateTime<Utc>,
-    pub cycles_completed_at: Vec<DateTime<Utc>>,
+    pub current_started: Timestamp,
+    pub cycles_completed_at: Vec<Timestamp>,
     pub ongoing_buckets: usize,
     #[serde(default)]
     pub active_scan_paths: usize,
@@ -1290,6 +1375,18 @@ pub struct ScannerMetricsReport {
     pub partial_cycles: u64,
 }
 
+#[derive(Clone, Debug, Default, Serialize, Deserialize)]
+pub struct ScannerRuntimeDetailsReport {
+    #[serde(default)]
+    pub disk_bucket_scan_states: Vec<ScannerDiskBucketScanSnapshot>,
+    #[serde(default)]
+    pub bucket_drive_results: Vec<ScannerBucketDriveResultSnapshot>,
+    #[serde(default)]
+    pub current_cycle_bucket_drive_results: Vec<ScannerBucketDriveResultSnapshot>,
+    #[serde(default)]
+    pub last_cycle_bucket_drive_results: Vec<ScannerBucketDriveResultSnapshot>,
+}
+
 impl CurrentCycle {
     pub fn unmarshal(&mut self, buf: &[u8]) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         *self = rmp_serde::from_slice(buf)?;
@@ -1657,6 +1754,7 @@ pub fn emit_scan_cycle_superseded(duration: Duration) {
 
 pub fn emit_scan_bucket_drive_complete(success: bool, bucket: &str, disk: &str, duration: Duration) {
     let result = if success { "success" } else { "error" };
+    global_metrics().record_scanner_bucket_drive_result(bucket, disk, result);
     metrics::counter!(
         OTEL_SCANNER_BUCKETS_SCANNED,
         "result" => result,
@@ -1673,6 +1771,7 @@ pub fn emit_scan_bucket_drive_complete(success: bool, bucket: &str, disk: &str,
 }
 
 pub fn emit_scan_bucket_drive_partial(bucket: &str, disk: &str, duration: Duration) {
+    global_metrics().record_scanner_bucket_drive_result(bucket, disk, SCAN_CYCLE_RESULT_PARTIAL_LABEL);
     metrics::counter!(
         OTEL_SCANNER_BUCKETS_SCANNED,
         "result" => SCAN_CYCLE_RESULT_PARTIAL_LABEL,
@@ -1723,6 +1822,10 @@ impl Metrics {
             scanner_set_scans_queued: AtomicU64::new(0),
             scanner_set_scans_active: AtomicU64::new(0),
             scanner_disk_bucket_scan_states: Mutex::new(HashMap::new()),
+            scanner_bucket_drive_results: Mutex::new(ScannerBucketDriveResults::default()),
+            scanner_bucket_drive_result_clock: AtomicU64::new(0),
+            current_scan_cycle_bucket_drive_results_start: Mutex::new(HashMap::new()),
+            last_scan_cycle_bucket_drive_results: Mutex::new(Vec::new()),
             scanner_leader_lock_state: RwLock::new("unknown".to_string()),
             scanner_leader_lock_held: AtomicBool::new(false),
             scanner_leader_lock_last_error: RwLock::new(String::new()),
@@ -2293,7 +2396,7 @@ impl Metrics {
         queued: Option<usize>,
         active: Option<usize>,
     ) {
-        let key = format!("{pool}/{set}");
+        let key = (pool.to_string(), set.to_string());
         let mut states = self
             .scanner_disk_bucket_scan_states
             .lock()
@@ -2310,6 +2413,41 @@ impl Metrics {
         }
     }
 
+    pub fn record_scanner_bucket_drive_result(&self, bucket: &str, drive: &str, result: &str) {
+        if bucket.is_empty() || drive.is_empty() || result.is_empty() {
+            return;
+        }
+        let key = ScannerBucketDriveResultKey::new(bucket, drive, result);
+        let mut results = self
+            .scanner_bucket_drive_results
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        let last_seen = self.scanner_bucket_drive_result_clock.fetch_add(1, Ordering::Relaxed);
+        if let Some(previous_last_seen) = results.counts.get_mut(&key).map(|value| {
+            let previous_last_seen = value.last_seen;
+            value.count = value.count.saturating_add(1);
+            value.last_seen = last_seen;
+            previous_last_seen
+        }) {
+            results.eviction_index.remove(&(previous_last_seen, key.clone()));
+            results.eviction_index.insert((last_seen, key));
+            return;
+        }
+
+        if results.counts.len() >= MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS
+            && let Some((_, stale_key)) = results.eviction_index.pop_first()
+        {
+            results.counts.remove(&stale_key);
+        }
+
+        if results.counts.len() < MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS {
+            results
+                .counts
+                .insert(key.clone(), ScannerBucketDriveResultValue { count: 1, last_seen });
+            results.eviction_index.insert((last_seen, key));
+        }
+    }
+
     // -----------------------------------------------------------------------
     // Read-side helpers
     // -----------------------------------------------------------------------
@@ -2481,6 +2619,11 @@ impl Metrics {
             &self.current_scan_cycle_replication_repair_work_start,
             &replication_repair_snapshot,
         );
+        let bucket_drive_results = self.scanner_bucket_drive_result_counts();
+        match self.current_scan_cycle_bucket_drive_results_start.lock() {
+            Ok(mut start) => *start = bucket_drive_results,
+            Err(poisoned) => *poisoned.into_inner() = bucket_drive_results,
+        }
         self.current_scan_cycle_work_active.store(true, Ordering::Release);
         snapshot
     }
@@ -2493,6 +2636,11 @@ impl Metrics {
         self.record_scan_cycle_work(work);
         self.record_scan_cycle_source_work(&source_work);
         self.record_scan_cycle_replication_repair_work(&replication_repair_work);
+        let bucket_drive_results = self.current_cycle_bucket_drive_result_snapshots();
+        match self.last_scan_cycle_bucket_drive_results.lock() {
+            Ok(mut last) => *last = bucket_drive_results,
+            Err(poisoned) => *poisoned.into_inner() = bucket_drive_results,
+        }
         self.current_scan_cycle_work_active.store(false, Ordering::Release);
     }
 
@@ -2576,6 +2724,105 @@ impl Metrics {
         }
     }
 
+    fn scanner_bucket_drive_result_counts(&self) -> HashMap<ScannerBucketDriveResultKey, u64> {
+        self.scanner_bucket_drive_results
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .counts
+            .iter()
+            .map(|(key, value)| (key.clone(), value.count))
+            .collect()
+    }
+
+    fn scanner_bucket_drive_result_snapshots(
+        counts: impl IntoIterator<Item = (ScannerBucketDriveResultKey, u64)>,
+    ) -> Vec<ScannerBucketDriveResultSnapshot> {
+        let mut snapshots = counts
+            .into_iter()
+            .filter(|(_, count)| *count > 0)
+            .map(|(key, count)| ScannerBucketDriveResultSnapshot {
+                bucket: key.bucket,
+                drive: key.drive,
+                result: key.result,
+                count,
+            })
+            .collect::<Vec<_>>();
+        snapshots.sort_by(|left, right| {
+            left.bucket
+                .cmp(&right.bucket)
+                .then_with(|| left.drive.cmp(&right.drive))
+                .then_with(|| left.result.cmp(&right.result))
+        });
+        snapshots
+    }
+
+    fn scanner_bucket_drive_result_counter_snapshots(&self) -> Vec<ScannerBucketDriveResultSnapshot> {
+        Self::scanner_bucket_drive_result_snapshots(self.scanner_bucket_drive_result_counts())
+    }
+
+    fn current_cycle_bucket_drive_result_snapshots(&self) -> Vec<ScannerBucketDriveResultSnapshot> {
+        let current = self.scanner_bucket_drive_result_counts();
+        let start = self
+            .current_scan_cycle_bucket_drive_results_start
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .clone();
+        Self::scanner_bucket_drive_result_snapshots(current.into_iter().filter_map(|(key, count)| {
+            let delta = count.saturating_sub(start.get(&key).copied().unwrap_or_default());
+            (delta > 0).then_some((key, delta))
+        }))
+    }
+
+    pub fn scanner_runtime_details_report(&self) -> ScannerRuntimeDetailsReport {
+        self.scanner_runtime_details_report_for_active(self.current_scan_cycle_work_active.load(Ordering::Acquire))
+    }
+
+    fn scanner_runtime_details_report_for_active(&self, current_cycle_active: bool) -> ScannerRuntimeDetailsReport {
+        let current_cycle_bucket_drive_results = if current_cycle_active {
+            self.current_cycle_bucket_drive_result_snapshots()
+        } else {
+            Vec::new()
+        };
+        ScannerRuntimeDetailsReport {
+            disk_bucket_scan_states: self.scanner_disk_bucket_scan_state_snapshots(),
+            bucket_drive_results: self.scanner_bucket_drive_result_counter_snapshots(),
+            current_cycle_bucket_drive_results,
+            last_cycle_bucket_drive_results: self
+                .last_scan_cycle_bucket_drive_results
+                .lock()
+                .unwrap_or_else(|poisoned| poisoned.into_inner())
+                .clone(),
+        }
+    }
+
+    fn scanner_disk_bucket_scan_state_snapshots(&self) -> Vec<ScannerDiskBucketScanSnapshot> {
+        let mut disk_bucket_scan_states = match self.scanner_disk_bucket_scan_states.lock() {
+            Ok(states) => states
+                .iter()
+                .map(|((pool, set), state)| ScannerDiskBucketScanSnapshot {
+                    pool: pool.clone(),
+                    set: set.clone(),
+                    concurrency_limit: state.concurrency_limit,
+                    queued: state.queued,
+                    active: state.active,
+                })
+                .collect::<Vec<_>>(),
+            Err(poisoned) => poisoned
+                .into_inner()
+                .iter()
+                .map(|((pool, set), state)| ScannerDiskBucketScanSnapshot {
+                    pool: pool.clone(),
+                    set: set.clone(),
+                    concurrency_limit: state.concurrency_limit,
+                    queued: state.queued,
+                    active: state.active,
+                })
+                .collect::<Vec<_>>(),
+        };
+        disk_bucket_scan_states.sort_by(|left, right| left.pool.cmp(&right.pool).then_with(|| left.set.cmp(&right.set)));
+        disk_bucket_scan_states
+    }
+
     fn scanner_source_work_values(&self) -> Vec<ScannerSourceWorkValues> {
         ScannerWorkSource::all()
             .iter()
@@ -2761,20 +3008,26 @@ impl Metrics {
 
     /// Build a full metrics report snapshot.
     pub async fn report(&self) -> ScannerMetricsReport {
+        self.report_with_runtime_details().await.0
+    }
+
+    pub async fn report_with_runtime_details(&self) -> (ScannerMetricsReport, ScannerRuntimeDetailsReport) {
         let mut m = ScannerMetricsReport::default();
+        let runtime_details;
 
         let has_cycle = {
             let cycle = self.cycle_info.read().await;
             let has_cycle = if let Some(cycle) = cycle.as_ref() {
                 m.current_cycle = cycle.current;
-                m.cycles_completed_at = cycle.cycle_completed.clone();
-                m.current_started = cycle.started;
+                m.cycles_completed_at = cycle.cycle_completed.iter().copied().map(chrono_to_jiff_timestamp).collect();
+                m.current_started = chrono_to_jiff_timestamp(cycle.started);
                 true
             } else {
                 false
             };
             m.current_cycle_active = self.current_scan_cycle_work_active.load(Ordering::Acquire);
             if m.current_cycle_active {
+                // Keep cycle_info before cycle-baseline locks so active scrapes cannot mix two cycle identities.
                 let current_work = self.scan_cycle_work_since(self.current_scan_cycle_work_start());
                 let current_source_work = self.scanner_source_work_since(&self.current_scan_cycle_source_work_start_values());
                 let current_replication_repair_work =
@@ -2797,19 +3050,20 @@ impl Metrics {
                 m.current_cycle_replication_repair =
                     self.scanner_replication_repair_work_snapshots(&current_replication_repair_work);
             }
+            runtime_details = self.scanner_runtime_details_report_for_active(m.current_cycle_active);
             has_cycle
         };
 
         if !has_cycle && let Some(init_time) = crate::get_global_init_time().await {
-            m.current_started = init_time;
+            m.current_started = chrono_to_jiff_timestamp(init_time);
         }
 
-        m.collected_at = Utc::now();
+        m.collected_at = Timestamp::now();
         let current_path_snapshots = self.current_path_snapshots().await;
         m.active_scan_paths = current_path_snapshots.len();
         m.oldest_active_path_age_seconds = current_path_snapshots
             .iter()
-            .map(|(_, state)| m.collected_at.signed_duration_since(state.updated_at).num_seconds().max(0) as u64)
+            .map(|(_, state)| timestamp_elapsed_seconds_since(m.collected_at, state.updated_at))
             .max()
             .unwrap_or_default();
         m.active_paths = current_path_snapshots
@@ -2826,15 +3080,11 @@ impl Metrics {
         m.current_set_scan_concurrency_limit = self.scanner_set_scan_concurrency_limit.load(Ordering::Relaxed);
         m.current_set_scans_queued = self.scanner_set_scans_queued.load(Ordering::Relaxed);
         m.current_set_scans_active = self.scanner_set_scans_active.load(Ordering::Relaxed);
+        let disk_bucket_scan_states = self.scanner_disk_bucket_scan_state_snapshots();
         let (disk_scan_concurrency_limit, disk_bucket_scans_queued, disk_bucket_scans_active) =
-            match self.scanner_disk_bucket_scan_states.lock() {
-                Ok(states) => states.values().fold((0, 0, 0), |acc, state| {
-                    (acc.0 + state.concurrency_limit, acc.1 + state.queued, acc.2 + state.active)
-                }),
-                Err(poisoned) => poisoned.into_inner().values().fold((0, 0, 0), |acc, state| {
-                    (acc.0 + state.concurrency_limit, acc.1 + state.queued, acc.2 + state.active)
-                }),
-            };
+            disk_bucket_scan_states.iter().fold((0, 0, 0), |acc, state| {
+                (acc.0 + state.concurrency_limit, acc.1 + state.queued, acc.2 + state.active)
+            });
         m.current_disk_scan_concurrency_limit = disk_scan_concurrency_limit;
         m.current_disk_bucket_scans_queued = disk_bucket_scans_queued;
         m.current_disk_bucket_scans_active = disk_bucket_scans_active;
@@ -3003,7 +3253,7 @@ impl Metrics {
         m.pacing_pressure = scanner_pacing_pressure(&m);
         m.maintenance_control = scanner_maintenance_control(&m);
 
-        m
+        (m, runtime_details)
     }
 }
 
@@ -3089,6 +3339,22 @@ impl Drop for CloseDiskGuard {
 mod tests {
     use super::*;
 
+    #[test]
+    fn scanner_metrics_report_timestamps_serialize_as_rfc3339_utc() {
+        let report = ScannerMetricsReport {
+            collected_at: Timestamp::constant(1_700_000_000, 123_456_000),
+            current_started: Timestamp::constant(1_699_999_940, 0),
+            cycles_completed_at: vec![Timestamp::constant(1_700_000_060, 987_654_000)],
+            ..Default::default()
+        };
+
+        let value = serde_json::to_value(&report).expect("scanner metrics report should serialize");
+
+        assert_eq!(value["collected_at"].as_str(), Some("2023-11-14T22:13:20.123456Z"));
+        assert_eq!(value["current_started"].as_str(), Some("2023-11-14T22:12:20Z"));
+        assert_eq!(value["cycles_completed_at"][0].as_str(), Some("2023-11-14T22:14:20.987654Z"));
+    }
+
     #[tokio::test]
     async fn close_disk_guard_runs_cleanup_when_an_early_return_drops_it() {
         let (closed_tx, closed_rx) = tokio::sync::oneshot::channel();
@@ -3147,7 +3413,7 @@ mod tests {
     #[tokio::test]
     async fn report_counts_active_scan_paths() {
         let metrics = Metrics::new();
-        let updated_at = Utc::now() - chrono::Duration::seconds(12);
+        let updated_at = Timestamp::now() - jiff::SignedDuration::from_secs(12);
         metrics.current_paths.write().await.insert(
             "disk-a".to_string(),
             Arc::new(CurrentPathTracker::new_at("bucket-a".to_string(), updated_at)),
@@ -3169,7 +3435,7 @@ mod tests {
         let metrics = Metrics::new();
         let tracker = Arc::new(CurrentPathTracker::new_at(
             "bucket-a".to_string(),
-            Utc::now() - chrono::Duration::hours(1),
+            Timestamp::now() - jiff::SignedDuration::from_secs(60 * 60),
         ));
         metrics
             .current_paths
@@ -3942,7 +4208,7 @@ mod tests {
         let report = metrics.report().await;
         *crate::globals::GLOBAL_INIT_TIME.write().await = previous_init_time;
 
-        assert_eq!(report.current_started, cycle_started);
+        assert_eq!(report.current_started, chrono_to_jiff_timestamp(cycle_started));
     }
 
     #[tokio::test]
@@ -4100,6 +4366,137 @@ mod tests {
         assert_eq!(report.life_time_ops.get("scan_bucket_drive_failure"), Some(&1));
     }
 
+    #[tokio::test]
+    async fn report_includes_structured_bucket_drive_results() {
+        let metrics = Metrics::new();
+        metrics.record_scanner_bucket_drive_result("photos", "/data1", "success");
+
+        let cycle_start = metrics.start_scan_cycle_work();
+        metrics.record_scanner_bucket_drive_result("photos", "/data1", "partial");
+
+        let active_report = metrics.scanner_runtime_details_report();
+        assert_eq!(
+            active_report.current_cycle_bucket_drive_results,
+            vec![ScannerBucketDriveResultSnapshot {
+                bucket: "photos".to_string(),
+                drive: "/data1".to_string(),
+                result: "partial".to_string(),
+                count: 1,
+            }]
+        );
+
+        metrics.finish_scan_cycle_work(cycle_start);
+
+        let report = metrics.scanner_runtime_details_report();
+
+        assert_eq!(
+            report.bucket_drive_results,
+            vec![
+                ScannerBucketDriveResultSnapshot {
+                    bucket: "photos".to_string(),
+                    drive: "/data1".to_string(),
+                    result: "partial".to_string(),
+                    count: 1,
+                },
+                ScannerBucketDriveResultSnapshot {
+                    bucket: "photos".to_string(),
+                    drive: "/data1".to_string(),
+                    result: "success".to_string(),
+                    count: 1,
+                },
+            ]
+        );
+        assert!(report.current_cycle_bucket_drive_results.is_empty());
+        assert_eq!(
+            report.last_cycle_bucket_drive_results,
+            vec![ScannerBucketDriveResultSnapshot {
+                bucket: "photos".to_string(),
+                drive: "/data1".to_string(),
+                result: "partial".to_string(),
+                count: 1,
+            }]
+        );
+    }
+
+    #[tokio::test]
+    async fn scanner_bucket_drive_results_are_bounded() {
+        let metrics = Metrics::new();
+        for index in 0..MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS {
+            metrics.record_scanner_bucket_drive_result(&format!("bucket-{index}"), "/data1", "success");
+        }
+        metrics.record_scanner_bucket_drive_result("overflow", "/data1", "success");
+
+        let report = metrics.scanner_runtime_details_report();
+
+        assert_eq!(report.bucket_drive_results.len(), MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS);
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .any(|snapshot| snapshot.bucket == "overflow")
+        );
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .all(|snapshot| snapshot.bucket != "bucket-0")
+        );
+    }
+
+    #[tokio::test]
+    async fn scanner_bucket_drive_result_eviction_keeps_recent_keys() {
+        let metrics = Metrics::new();
+        for index in 0..MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS {
+            metrics.record_scanner_bucket_drive_result(&format!("bucket-{index}"), "/data1", "success");
+        }
+        metrics.record_scanner_bucket_drive_result("bucket-0", "/data1", "success");
+        metrics.record_scanner_bucket_drive_result("overflow", "/data1", "success");
+
+        let report = metrics.scanner_runtime_details_report();
+
+        assert_eq!(report.bucket_drive_results.len(), MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS);
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .any(|snapshot| snapshot.bucket == "bucket-0" && snapshot.count == 2)
+        );
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .all(|snapshot| snapshot.bucket != "bucket-1")
+        );
+    }
+
+    #[tokio::test]
+    async fn scanner_bucket_drive_result_eviction_survives_full_refresh() {
+        let metrics = Metrics::new();
+        for index in 0..MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS {
+            metrics.record_scanner_bucket_drive_result(&format!("bucket-{index}"), "/data1", "success");
+        }
+        for index in 0..MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS {
+            metrics.record_scanner_bucket_drive_result(&format!("bucket-{index}"), "/data1", "success");
+        }
+        metrics.record_scanner_bucket_drive_result("overflow", "/data1", "success");
+
+        let report = metrics.scanner_runtime_details_report();
+
+        assert_eq!(report.bucket_drive_results.len(), MAX_SCANNER_BUCKET_DRIVE_RESULT_KEYS);
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .any(|snapshot| snapshot.bucket == "overflow")
+        );
+        assert!(
+            report
+                .bucket_drive_results
+                .iter()
+                .all(|snapshot| snapshot.bucket != "bucket-0")
+        );
+    }
+
     #[tokio::test]
     async fn report_includes_usage_freshness_status() {
         let metrics = Metrics::new();
@@ -4234,7 +4631,7 @@ mod tests {
         let active = metrics.report().await;
         assert!(active.current_cycle_active);
         assert_eq!(active.current_cycle, 12);
-        assert_eq!(active.current_started, cycle_started);
+        assert_eq!(active.current_started, chrono_to_jiff_timestamp(cycle_started));
 
         let idle_cycle = CurrentCycle {
             current: 0,
@@ -4265,9 +4662,10 @@ mod tests {
         };
         let cycle_ten_start = metrics.start_scan_cycle_work_with_cycle(cycle_ten.clone()).await;
         metrics.operations[Metric::ScanObject as usize].store(1, Ordering::Relaxed);
+        metrics.record_scanner_bucket_drive_result("cycle-ten", "/data1", "partial");
 
         let paths = metrics.current_paths.write().await;
-        let mut report = Box::pin(metrics.report());
+        let mut report = Box::pin(metrics.report_with_runtime_details());
         let waker = std::task::Waker::noop();
         let mut context = std::task::Context::from_waker(waker);
         assert!(report.as_mut().poll(&mut context).is_pending());
@@ -4284,12 +4682,22 @@ mod tests {
             })
             .await;
         metrics.operations[Metric::ScanObject as usize].store(101, Ordering::Relaxed);
+        metrics.record_scanner_bucket_drive_result("cycle-eleven", "/data1", "partial");
 
         drop(paths);
-        let snapshot = report.await;
+        let (snapshot, runtime_details) = report.await;
 
         assert_eq!(snapshot.current_cycle, 10);
         assert_eq!(snapshot.current_cycle_objects_scanned, 1);
+        assert_eq!(
+            runtime_details.current_cycle_bucket_drive_results,
+            vec![ScannerBucketDriveResultSnapshot {
+                bucket: "cycle-ten".to_string(),
+                drive: "/data1".to_string(),
+                result: "partial".to_string(),
+                count: 1,
+            }]
+        );
 
         metrics
             .finish_scan_cycle_work_with_cycle(cycle_eleven_start, CurrentCycle::default())

crates/config/src/constants/internode.rs

@@ -177,10 +177,9 @@ const _: () = assert!(!DEFAULT_INTERNODE_RPC_REPLAY_SCOPE_STRICT);
 ///
 /// The cache retains each nonce for the ~10-minute signature freshness envelope. Once peers use
 /// replay-scoped v3 authentication, every authenticated RPC consumes one entry, so the steady
-/// state holds roughly `authenticated RPC RPS x 601s` entries. The default sustains about 1,700
-/// authenticated RPCs per second (about 120 MiB worst case, allocated only under sustained load);
-/// operators must size it for the node's aggregate peak RPC rate before enabling strict replay
-/// scope. Overflow fails closed — legitimate signed traffic is the only thing that can fill the
+/// state holds roughly `authenticated RPC RPS x 601s` entries. This default is the minimum floor:
+/// explicit operator values and resource-aware auto sizing both clamp upward to at least this
+/// value. Overflow fails closed — legitimate signed traffic is the only thing that can fill the
 /// cache (replays are rejected before insertion, and an attacker cannot mint valid nonces without
 /// the shared secret) — and increments
 /// `rustfs_system_network_internode_replay_cache_overflow_total`, so a sustained non-zero overflow

crates/data-usage/src/data_usage.rs

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use serde::{Deserialize, Serialize};
+use serde::{Deserialize, Serialize, ser::SerializeMap as _};
 use std::{
     collections::{HashMap, HashSet},
     hash::{DefaultHasher, Hash, Hasher},
@@ -37,6 +37,10 @@ pub const USAGE_LAST_UPDATE_FUTURE_TOLERANCE: Duration = Duration::from_secs(5 *
 /// Keeping the existing object name preserves rolling-upgrade and rollback
 /// compatibility without allowing an ambiguous snapshot to become authoritative.
 pub const DATA_USAGE_OBJECT_NAME: &str = ".usage.v2.json";
+/// Latest structurally complete scanner observation. Unlike
+/// [`DATA_USAGE_OBJECT_NAME`], this object is never authoritative for quota
+/// admission because namespace activity may have raced the scan.
+pub const DATA_USAGE_OBSERVED_OBJECT_NAME: &str = ".usage.observed.json";
 
 /// Usage snapshot written by scanner implementations predating distributed
 /// leadership fencing. It is read only when neither authoritative snapshot
@@ -51,24 +55,36 @@ pub fn usage_last_update_is_untrusted_future(existing_last_update: SystemTime, n
     existing_last_update > now + USAGE_LAST_UPDATE_FUTURE_TOLERANCE
 }
 
-#[derive(Clone, Copy, Default, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Copy, Default, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct TierStats {
     pub total_size: u64,
-    pub num_versions: i32,
-    pub num_objects: i32,
+    pub num_versions: u64,
+    pub num_objects: u64,
 }
 
 impl TierStats {
     pub fn add(&self, u: &TierStats) -> TierStats {
         TierStats {
-            total_size: self.total_size + u.total_size,
-            num_versions: self.num_versions + u.num_versions,
-            num_objects: self.num_objects + u.num_objects,
+            total_size: self.total_size.saturating_add(u.total_size),
+            num_versions: self.num_versions.saturating_add(u.num_versions),
+            num_objects: self.num_objects.saturating_add(u.num_objects),
         }
     }
+
+    /// True when [`TierStats::add`] would report the exact sum instead of saturating.
+    pub fn fits_add(&self, u: &TierStats) -> bool {
+        self.total_size.checked_add(u.total_size).is_some()
+            && self.num_versions.checked_add(u.num_versions).is_some()
+            && self.num_objects.checked_add(u.num_objects).is_some()
+    }
+
+    /// True when this tier contributed nothing, i.e. merging it is a no-op.
+    pub fn is_empty(&self) -> bool {
+        self.total_size == 0 && self.num_versions == 0 && self.num_objects == 0
+    }
 }
 
-#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
 pub struct AllTierStats {
     pub tiers: HashMap<String, TierStats>,
 }
@@ -78,31 +94,35 @@ impl AllTierStats {
         Self { tiers: HashMap::new() }
     }
 
-    pub fn add_sizes(&mut self, tiers: HashMap<String, TierStats>) {
+    pub fn is_empty(&self) -> bool {
+        self.tiers.is_empty()
+    }
+
+    /// Folds a scan summary's per-tier map in.
+    ///
+    /// Scanners seed the map with a zeroed entry for every configured tier, so
+    /// empty contributions are skipped to keep the persisted cache from growing
+    /// one key per tier on every folder that never held tiered data.
+    pub fn add_sizes(&mut self, tiers: &HashMap<String, TierStats>) {
         for (tier, st) in tiers {
-            self.tiers
-                .insert(tier.clone(), self.tiers.get(&tier).copied().unwrap_or_default().add(&st));
+            if st.is_empty() {
+                continue;
+            }
+            let entry = self.tiers.entry(tier.clone()).or_default();
+            *entry = entry.add(st);
         }
     }
 
-    pub fn merge(&mut self, other: AllTierStats) {
-        for (tier, st) in other.tiers {
-            self.tiers
-                .insert(tier.clone(), self.tiers.get(&tier).copied().unwrap_or_default().add(&st));
-        }
+    pub fn merge(&mut self, other: &AllTierStats) {
+        self.add_sizes(&other.tiers);
     }
 
-    pub fn populate_stats(&self, stats: &mut HashMap<String, TierStats>) {
-        for (tier, st) in &self.tiers {
-            stats.insert(
-                tier.clone(),
-                TierStats {
-                    total_size: st.total_size,
-                    num_versions: st.num_versions,
-                    num_objects: st.num_objects,
-                },
-            );
-        }
+    /// True when [`AllTierStats::merge`] would report exact sums for every tier.
+    pub fn fits_merge(&self, other: &AllTierStats) -> bool {
+        other
+            .tiers
+            .iter()
+            .all(|(tier, right)| self.tiers.get(tier).is_none_or(|left| left.fits_add(right)))
     }
 }
 
@@ -183,6 +203,14 @@ pub struct DataUsageInfo {
     pub objects_total_size: u64,
     /// Replication info across all buckets
     pub replication_info: HashMap<String, BucketTargetUsageInfo>,
+    /// Usage per storage class and remote tier across all buckets.
+    ///
+    /// Absent on snapshots written before per-tier accounting was published,
+    /// and on clusters with no remote tier configured: the scanner classifies
+    /// objects by tier (including `STANDARD`/`REDUCED_REDUNDANCY`) only once a
+    /// tier exists, so an absent value means "not accounted", never "zero".
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub tier_stats: Option<AllTierStats>,
 
     /// Total number of buckets in this cluster
     pub buckets_count: u64,
@@ -194,6 +222,20 @@ pub struct DataUsageInfo {
     /// explicit entry for every bucket, including confirmed-empty buckets.
     #[serde(default)]
     pub usage_snapshot_complete: bool,
+    /// Whether no namespace activity or dirty-usage generation changed while
+    /// the coordinated snapshot was being produced.
+    ///
+    /// `false` still describes a structurally complete, useful point-in-time
+    /// usage view, but follow-up scanner work remains pending. `None` is kept
+    /// for snapshots written before this status became observable.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub usage_snapshot_converged: Option<bool>,
+    /// Identity of the authoritative snapshot from which a nonconverged
+    /// observation started. Admin readers require an exact match before using
+    /// the observation, so bucket namespace mutations fence old observations
+    /// without relying on synchronized clocks.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub usage_snapshot_authoritative_baseline: Option<DataUsageSnapshotIdentity>,
     /// Deprecated kept here for backward compatibility reasons
     pub bucket_sizes: HashMap<String, u64>,
     /// Per-disk snapshot information when available
@@ -201,6 +243,59 @@ pub struct DataUsageInfo {
     pub disk_usage_status: Vec<DiskUsageStatus>,
 }
 
+/// Stable identity fields changed by both coordinated scanner publication and
+/// backward-compatible bucket namespace cleanup.
+#[derive(Debug, Default, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+pub struct DataUsageSnapshotIdentity {
+    pub last_update: Option<SystemTime>,
+    pub scanner_cycle: Option<u64>,
+    pub scanner_epoch: Option<u64>,
+}
+
+impl DataUsageInfo {
+    pub fn snapshot_identity(&self) -> DataUsageSnapshotIdentity {
+        DataUsageSnapshotIdentity {
+            last_update: self.last_update,
+            scanner_cycle: self.scanner_cycle,
+            scanner_epoch: self.scanner_epoch,
+        }
+    }
+}
+
+/// Return whether `candidate` was produced after `baseline`.
+///
+/// New coordinated snapshots are ordered by leadership epoch and scanner
+/// cycle. The timestamp fallback preserves ordering for legacy snapshots that
+/// predate those fields.
+pub fn data_usage_snapshot_is_newer(candidate: &DataUsageInfo, baseline: &DataUsageInfo) -> bool {
+    match (
+        candidate.scanner_epoch.zip(candidate.scanner_cycle),
+        baseline.scanner_epoch.zip(baseline.scanner_cycle),
+    ) {
+        (Some(candidate), Some(baseline)) => candidate > baseline,
+        (Some(_), None) => true,
+        (None, Some(_)) => false,
+        (None, None) => match (candidate.last_update, baseline.last_update) {
+            (Some(candidate), Some(baseline)) => candidate > baseline,
+            (Some(_), None) => true,
+            (None, Some(_) | None) => false,
+        },
+    }
+}
+
+/// Return whether a nonconverged observation may safely supersede the admin
+/// view of `authoritative`.
+///
+/// The exact baseline identity is independent of clock ordering. Older binaries
+/// already advance the authoritative timestamp when deleting a bucket, so a
+/// rollback delete/recreate fences the previous bucket incarnation too.
+pub fn observed_data_usage_is_newer(observed: &DataUsageInfo, authoritative: &DataUsageInfo) -> bool {
+    observed.usage_snapshot_converged == Some(false)
+        && observed.is_complete_bucket_usage_snapshot()
+        && observed.usage_snapshot_authoritative_baseline.as_ref() == Some(&authoritative.snapshot_identity())
+        && data_usage_snapshot_is_newer(observed, authoritative)
+}
+
 /// Metadata describing the status of a disk-level data usage snapshot.
 #[derive(Debug, Default, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub struct DiskUsageStatus {
@@ -562,7 +657,7 @@ impl ReplicationAllStats {
 }
 
 /// Data usage cache entry
-#[derive(Clone, Debug, Default, Serialize, Deserialize)]
+#[derive(Clone, Debug, Default, Deserialize)]
 pub struct DataUsageEntry {
     pub children: DataUsageHashMap,
     // These fields do not include any children.
@@ -577,6 +672,34 @@ pub struct DataUsageEntry {
     /// Number of objects that failed to scan (e.g., IO errors)
     #[serde(default)]
     pub failed_objects: usize,
+    /// Per-tier usage contributed by this entry, present only once a scan
+    /// observed tier-classified objects.
+    #[serde(default)]
+    pub all_tier_stats: Option<AllTierStats>,
+}
+
+impl Serialize for DataUsageEntry {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        // Keep entries map-encoded so older readers can ignore fields appended
+        // by newer scanner versions during rolling upgrades. The derived
+        // (array) encoding made any appended field a decode error for them.
+        let mut state = serializer.serialize_map(Some(11))?;
+        state.serialize_entry("children", &self.children)?;
+        state.serialize_entry("size", &self.size)?;
+        state.serialize_entry("objects", &self.objects)?;
+        state.serialize_entry("versions", &self.versions)?;
+        state.serialize_entry("delete_markers", &self.delete_markers)?;
+        state.serialize_entry("obj_sizes", &self.obj_sizes)?;
+        state.serialize_entry("obj_versions", &self.obj_versions)?;
+        state.serialize_entry("replication_stats", &self.replication_stats)?;
+        state.serialize_entry("compacted", &self.compacted)?;
+        state.serialize_entry("failed_objects", &self.failed_objects)?;
+        state.serialize_entry("all_tier_stats", &self.all_tier_stats)?;
+        state.end()
+    }
 }
 
 impl DataUsageEntry {
@@ -635,10 +758,22 @@ impl DataUsageEntry {
             }
         }
 
+        if let Some(o_tiers) = other.all_tier_stats.as_ref().filter(|tiers| !tiers.is_empty()) {
+            self.all_tier_stats.get_or_insert_with(AllTierStats::new).merge(o_tiers);
+        }
+
         self.obj_sizes.merge_from(&other.obj_sizes);
         self.obj_versions.merge_from(&other.obj_versions);
     }
 
+    /// Folds a scan summary's per-tier map into this entry.
+    pub fn add_tier_sizes(&mut self, tiers: &HashMap<String, TierStats>) {
+        if tiers.values().all(TierStats::is_empty) {
+            return;
+        }
+        self.all_tier_stats.get_or_insert_with(AllTierStats::new).add_sizes(tiers);
+    }
+
     pub fn checked_merge(&mut self, other: &DataUsageEntry) -> bool {
         let scalar_counts_fit = self.objects.checked_add(other.objects).is_some()
             && self.versions.checked_add(other.versions).is_some()
@@ -698,7 +833,12 @@ impl DataUsageEntry {
             }
         };
 
-        if !scalar_counts_fit || !histograms_fit || !replication_fits {
+        let tier_stats_fit = match (&self.all_tier_stats, &other.all_tier_stats) {
+            (_, None) | (None, Some(_)) => true,
+            (Some(left), Some(right)) => left.fits_merge(right),
+        };
+
+        if !scalar_counts_fit || !histograms_fit || !replication_fits || !tier_stats_fit {
             return false;
         }
         self.merge(other);
@@ -1038,6 +1178,7 @@ impl DataUsageCache {
             versions_total_count: flat.versions as u64,
             delete_markers_total_count: flat.delete_markers as u64,
             objects_total_size: flat.size as u64,
+            tier_stats: flat.all_tier_stats.filter(|tiers| !tiers.is_empty()),
             buckets_count: u64::try_from(buckets.len()).unwrap_or(u64::MAX),
             buckets_usage,
             usage_snapshot_complete: self.info.snapshot_complete,
@@ -1525,6 +1666,172 @@ mod tests {
         buckets_count: u64,
     }
 
+    fn tier_entry(tier: &str, stats: TierStats) -> DataUsageEntry {
+        let mut entry = DataUsageEntry::default();
+        entry.add_tier_sizes(&HashMap::from([(tier.to_string(), stats)]));
+        entry
+    }
+
+    #[test]
+    fn tier_stats_survive_entry_merge() {
+        let mut left = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: 10,
+                num_versions: 2,
+                num_objects: 1,
+            },
+        );
+        let mut right = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: 5,
+                num_versions: 1,
+                num_objects: 1,
+            },
+        );
+        right.add_tier_sizes(&HashMap::from([(
+            "COLD".to_string(),
+            TierStats {
+                total_size: 7,
+                num_versions: 1,
+                num_objects: 0,
+            },
+        )]));
+
+        assert!(left.checked_merge(&right), "merging exact tier totals must be accepted");
+
+        let tiers = &left.all_tier_stats.expect("merged entry keeps tier stats").tiers;
+        assert_eq!(
+            tiers.get("WARM"),
+            Some(&TierStats {
+                total_size: 15,
+                num_versions: 3,
+                num_objects: 2,
+            })
+        );
+        assert_eq!(
+            tiers.get("COLD"),
+            Some(&TierStats {
+                total_size: 7,
+                num_versions: 1,
+                num_objects: 0,
+            })
+        );
+    }
+
+    #[test]
+    fn tier_stats_merge_into_an_untiered_entry() {
+        let mut left = DataUsageEntry::default();
+        let right = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: 10,
+                num_versions: 1,
+                num_objects: 1,
+            },
+        );
+
+        assert!(left.checked_merge(&right));
+
+        assert_eq!(
+            left.all_tier_stats.expect("tier stats adopted from the merged entry").tiers["WARM"],
+            TierStats {
+                total_size: 10,
+                num_versions: 1,
+                num_objects: 1,
+            }
+        );
+    }
+
+    #[test]
+    fn checked_merge_rejects_overflowing_tier_totals() {
+        let mut left = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: u64::MAX,
+                num_versions: 1,
+                num_objects: 1,
+            },
+        );
+        let right = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: 1,
+                num_versions: 1,
+                num_objects: 1,
+            },
+        );
+
+        assert!(!left.checked_merge(&right), "saturating tier totals must not be published");
+        assert_eq!(left.all_tier_stats.expect("left is untouched").tiers["WARM"].total_size, u64::MAX);
+    }
+
+    /// Entry shape released before per-tier accounting, using the derived
+    /// (array) encoding those writers produced.
+    #[derive(Serialize, Deserialize)]
+    struct LegacyEntry {
+        children: DataUsageHashMap,
+        size: usize,
+        objects: usize,
+        versions: usize,
+        delete_markers: usize,
+        obj_sizes: SizeHistogram,
+        obj_versions: VersionsHistogram,
+        replication_stats: Option<ReplicationAllStats>,
+        compacted: bool,
+        #[serde(default)]
+        failed_objects: usize,
+    }
+
+    #[test]
+    fn entries_are_map_encoded_so_appended_fields_stay_readable() {
+        // A derived (array) encoding turns every appended field into a decode
+        // error for readers built before it existed, which would cost a mixed
+        // -version cluster its whole scan cache. Entries must stay map-encoded.
+        let current = tier_entry(
+            "WARM",
+            TierStats {
+                total_size: 3,
+                num_versions: 1,
+                num_objects: 1,
+            },
+        );
+        let mut encoded = Vec::new();
+        current
+            .serialize(&mut rmp_serde::Serializer::new(&mut encoded))
+            .expect("encode current entry");
+
+        let legacy: LegacyEntry = rmp_serde::from_slice(&encoded).expect("legacy reader should ignore the appended field");
+        assert_eq!(legacy.objects, 0);
+    }
+
+    #[test]
+    fn legacy_array_encoded_entries_still_load() {
+        let legacy = LegacyEntry {
+            children: DataUsageHashMap::default(),
+            size: 12,
+            objects: 3,
+            versions: 4,
+            delete_markers: 1,
+            obj_sizes: SizeHistogram::default(),
+            obj_versions: VersionsHistogram::default(),
+            replication_stats: None,
+            compacted: false,
+            failed_objects: 2,
+        };
+        let mut encoded = Vec::new();
+        legacy
+            .serialize(&mut rmp_serde::Serializer::new(&mut encoded))
+            .expect("encode legacy entry");
+
+        let decoded: DataUsageEntry = rmp_serde::from_slice(&encoded).expect("current reader should default the missing field");
+
+        assert_eq!(decoded.size, 12);
+        assert_eq!(decoded.failed_objects, 2);
+        assert!(decoded.all_tier_stats.is_none());
+    }
+
     #[test]
     fn hash_path_uses_portable_slash_semantics() {
         for (input, expected) in [
@@ -1547,6 +1854,8 @@ mod tests {
         let current = DataUsageInfo {
             last_update: Some(SystemTime::UNIX_EPOCH),
             usage_snapshot_complete: true,
+            usage_snapshot_converged: Some(false),
+            usage_snapshot_authoritative_baseline: Some(DataUsageSnapshotIdentity::default()),
             ..Default::default()
         };
         let encoded = rmp_serde::to_vec_named(&current).expect("encode current data usage snapshot");
@@ -1554,6 +1863,76 @@ mod tests {
 
         assert_eq!(legacy.buckets_count, 0);
         assert!(current.is_complete_bucket_usage_snapshot());
+        assert_eq!(current.usage_snapshot_converged, Some(false));
+    }
+
+    #[test]
+    fn convergence_marker_defaults_to_unknown_for_older_snapshots() {
+        let encoded = rmp_serde::to_vec_named(&DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH),
+            usage_snapshot_complete: true,
+            ..Default::default()
+        })
+        .expect("encode pre-convergence data usage snapshot");
+        let decoded: DataUsageInfo = rmp_serde::from_slice(&encoded).expect("decode older data usage snapshot");
+
+        assert!(decoded.is_complete_bucket_usage_snapshot());
+        assert_eq!(decoded.usage_snapshot_converged, None);
+    }
+
+    #[test]
+    fn observation_selection_is_clock_independent_and_baseline_fenced() {
+        let mut authoritative = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(600)),
+            scanner_epoch: Some(7),
+            scanner_cycle: Some(10),
+            usage_snapshot_complete: true,
+            ..Default::default()
+        };
+        let observed = DataUsageInfo {
+            // A newer leader may have a slower wall clock.
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(300)),
+            scanner_epoch: Some(8),
+            scanner_cycle: Some(1),
+            usage_snapshot_complete: true,
+            usage_snapshot_converged: Some(false),
+            usage_snapshot_authoritative_baseline: Some(authoritative.snapshot_identity()),
+            ..Default::default()
+        };
+
+        assert!(observed_data_usage_is_newer(&observed, &authoritative));
+
+        authoritative.last_update = Some(SystemTime::UNIX_EPOCH + Duration::from_secs(601));
+        assert!(
+            !observed_data_usage_is_newer(&observed, &authoritative),
+            "an old-binary namespace mutation must fence the prior bucket incarnation regardless of clock skew"
+        );
+    }
+
+    #[test]
+    fn observation_selection_requires_nonconverged_complete_newer_data() {
+        let authoritative = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH),
+            scanner_epoch: Some(2),
+            scanner_cycle: Some(10),
+            usage_snapshot_complete: true,
+            ..Default::default()
+        };
+        let baseline = Some(authoritative.snapshot_identity());
+        let candidate = |epoch, cycle, converged, complete| DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(1)),
+            scanner_epoch: Some(epoch),
+            scanner_cycle: Some(cycle),
+            usage_snapshot_complete: complete,
+            usage_snapshot_converged: converged,
+            usage_snapshot_authoritative_baseline: baseline,
+            ..Default::default()
+        };
+
+        assert!(observed_data_usage_is_newer(&candidate(2, 11, Some(false), true), &authoritative));
+        assert!(!observed_data_usage_is_newer(&candidate(2, 9, Some(false), true), &authoritative));
+        assert!(!observed_data_usage_is_newer(&candidate(2, 11, Some(true), true), &authoritative));
+        assert!(!observed_data_usage_is_newer(&candidate(2, 11, Some(false), false), &authoritative));
     }
 
     #[test]
@@ -1901,6 +2280,44 @@ mod tests {
         assert_eq!(info.buckets_count, 2);
         assert!(info.buckets_usage.is_empty());
         assert_eq!(info.objects_total_count, 3);
+        assert!(info.tier_stats.is_none());
+    }
+
+    #[test]
+    fn test_dui_reports_tier_usage_from_the_flattened_tree() {
+        let root_hash = hash_path("root");
+        let bucket_hash = hash_path("bucket-a");
+        let mut cache = DataUsageCache {
+            info: DataUsageCacheInfo {
+                name: "root".to_string(),
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        cache.replace_hashed(&root_hash, &None, &DataUsageEntry::default());
+        cache.replace_hashed(
+            &bucket_hash,
+            &Some(root_hash),
+            &tier_entry(
+                "WARM",
+                TierStats {
+                    total_size: 40,
+                    num_versions: 2,
+                    num_objects: 2,
+                },
+            ),
+        );
+
+        let info = cache.dui("root", &["bucket-a".to_string()]);
+
+        assert_eq!(
+            info.tier_stats.expect("child tier usage should roll up to the root").tiers["WARM"],
+            TierStats {
+                total_size: 40,
+                num_versions: 2,
+                num_objects: 2,
+            }
+        );
     }
 
     #[test]

crates/e2e_test/src/bucket_logging_test.rs

@@ -16,91 +16,17 @@
 
 #[cfg(test)]
 mod tests {
-    use crate::common::{RustFSTestEnvironment, init_logging};
+    use crate::common::{RustFSTestEnvironment, init_logging, signed_s3_request};
     use aws_sdk_s3::error::ProvideErrorMetadata;
     use aws_sdk_s3::types::{
         AccelerateConfiguration, BucketAccelerateStatus, BucketLoggingStatus, IndexDocument, LoggingEnabled, Payer,
         RequestPaymentConfiguration, WebsiteConfiguration,
     };
+    use http::Method;
+    use http::header::CONTENT_TYPE;
     use serial_test::serial;
-    use std::path::PathBuf;
-    use std::process::Command;
     use tracing::info;
 
-    fn awscurl_binary_path() -> PathBuf {
-        std::env::var_os("AWSCURL_PATH")
-            .map(PathBuf::from)
-            .unwrap_or_else(|| PathBuf::from("awscurl"))
-    }
-
-    fn awscurl_available() -> bool {
-        Command::new(awscurl_binary_path()).arg("--version").output().is_ok()
-    }
-
-    fn execute_s3_awscurl(
-        method: &str,
-        url: &str,
-        access_key: &str,
-        secret_key: &str,
-    ) -> Result<String, Box<dyn std::error::Error + Send + Sync>> {
-        let output = Command::new(awscurl_binary_path())
-            .args([
-                "--service",
-                "s3",
-                "--region",
-                "us-east-1",
-                "--access_key",
-                access_key,
-                "--secret_key",
-                secret_key,
-                "-i",
-                "-X",
-                method,
-                url,
-            ])
-            .output()?;
-        if !output.status.success() {
-            let stderr = String::from_utf8_lossy(&output.stderr);
-            let stdout = String::from_utf8_lossy(&output.stdout);
-            return Err(format!("awscurl failed: stderr='{stderr}', stdout='{stdout}'").into());
-        }
-        Ok(String::from_utf8_lossy(&output.stdout).to_string())
-    }
-
-    fn parse_status(raw: &str) -> Option<u16> {
-        raw.lines()
-            .filter_map(|line| {
-                if line.starts_with("HTTP/") {
-                    line.split_whitespace().nth(1)?.parse::<u16>().ok()
-                } else {
-                    None
-                }
-            })
-            .next_back()
-    }
-
-    fn parse_body(raw: &str) -> String {
-        if let Some(pos) = raw.rfind("\r\n\r\n") {
-            return raw[pos + 4..].to_string();
-        }
-        if let Some(pos) = raw.rfind("\n\n") {
-            return raw[pos + 2..].to_string();
-        }
-        String::new()
-    }
-
-    fn parse_headers(raw: &str) -> String {
-        let start = raw.rfind("HTTP/").unwrap_or(0);
-        let tail = &raw[start..];
-        if let Some(pos) = tail.find("\r\n\r\n") {
-            return tail[..pos].to_string();
-        }
-        if let Some(pos) = tail.find("\n\n") {
-            return tail[..pos].to_string();
-        }
-        tail.to_string()
-    }
-
     #[tokio::test]
     #[serial]
     async fn test_dummy_bucket_compatibility_endpoints() {
@@ -470,10 +396,6 @@ mod tests {
     async fn test_dummy_bucket_endpoints_http_contracts() {
         init_logging();
         info!("Starting test: dummy-compat bucket API HTTP contracts");
-        if !awscurl_available() {
-            info!("Skipping test_dummy_bucket_endpoints_http_contracts: awscurl binary not found");
-            return;
-        }
 
         let mut env = RustFSTestEnvironment::new().await.expect("Failed to create test environment");
         env.start_rustfs_server(vec![]).await.expect("Failed to start RustFS");
@@ -488,56 +410,112 @@ mod tests {
             .await
             .expect("Failed to create bucket");
 
-        let logging_raw = execute_s3_awscurl("GET", &format!("{}/{bucket}?logging=", env.url), &env.access_key, &env.secret_key)
-            .expect("GetBucketLogging HTTP request failed");
-        assert_eq!(parse_status(&logging_raw), Some(200), "GetBucketLogging should return 200");
-        let logging_body = parse_body(&logging_raw);
+        let logging_response = signed_s3_request(
+            Method::GET,
+            &format!("{}/{bucket}?logging=", env.url),
+            None,
+            None,
+            &env.access_key,
+            &env.secret_key,
+        )
+        .await
+        .expect("GetBucketLogging HTTP request failed");
+        assert_eq!(logging_response.status(), 200, "GetBucketLogging should return 200");
+        let logging_body = logging_response
+            .text()
+            .await
+            .expect("Failed to read GetBucketLogging response body");
         assert!(
             logging_body.contains("<BucketLoggingStatus"),
             "GetBucketLogging response should contain BucketLoggingStatus XML, got: {logging_body}"
         );
 
-        let accel_raw = execute_s3_awscurl("GET", &format!("{}/{bucket}?accelerate=", env.url), &env.access_key, &env.secret_key)
-            .expect("GetBucketAccelerateConfiguration HTTP request failed");
-        assert_eq!(parse_status(&accel_raw), Some(200), "GetBucketAccelerateConfiguration should return 200");
-        let accel_body = parse_body(&accel_raw);
+        let accel_response = signed_s3_request(
+            Method::GET,
+            &format!("{}/{bucket}?accelerate=", env.url),
+            None,
+            None,
+            &env.access_key,
+            &env.secret_key,
+        )
+        .await
+        .expect("GetBucketAccelerateConfiguration HTTP request failed");
+        assert_eq!(accel_response.status(), 200, "GetBucketAccelerateConfiguration should return 200");
+        let accel_body = accel_response
+            .text()
+            .await
+            .expect("Failed to read GetBucketAccelerateConfiguration response body");
         assert!(
             accel_body.contains("<AccelerateConfiguration"),
             "GetBucketAccelerateConfiguration response should contain AccelerateConfiguration XML, got: {accel_body}"
         );
 
-        let payment_raw =
-            execute_s3_awscurl("GET", &format!("{}/{bucket}?requestPayment=", env.url), &env.access_key, &env.secret_key)
-                .expect("GetBucketRequestPayment HTTP request failed");
-        assert_eq!(parse_status(&payment_raw), Some(200), "GetBucketRequestPayment should return 200");
-        let payment_body = parse_body(&payment_raw);
+        let payment_response = signed_s3_request(
+            Method::GET,
+            &format!("{}/{bucket}?requestPayment=", env.url),
+            None,
+            None,
+            &env.access_key,
+            &env.secret_key,
+        )
+        .await
+        .expect("GetBucketRequestPayment HTTP request failed");
+        assert_eq!(payment_response.status(), 200, "GetBucketRequestPayment should return 200");
+        let payment_body = payment_response
+            .text()
+            .await
+            .expect("Failed to read GetBucketRequestPayment response body");
         assert!(
             payment_body.contains("<Payer>BucketOwner</Payer>"),
             "GetBucketRequestPayment should return BucketOwner payer, got: {payment_body}"
         );
 
-        let website_raw = execute_s3_awscurl("GET", &format!("{}/{bucket}?website=", env.url), &env.access_key, &env.secret_key)
-            .expect("GetBucketWebsite HTTP request failed");
+        let website_response = signed_s3_request(
+            Method::GET,
+            &format!("{}/{bucket}?website=", env.url),
+            None,
+            None,
+            &env.access_key,
+            &env.secret_key,
+        )
+        .await
+        .expect("GetBucketWebsite HTTP request failed");
         assert_eq!(
-            parse_status(&website_raw),
-            Some(404),
+            website_response.status(),
+            404,
             "GetBucketWebsite should return 404 when website config is absent"
         );
-        let website_content_type = parse_headers(&website_raw).to_ascii_lowercase();
+        let website_content_type = website_response
+            .headers()
+            .get(CONTENT_TYPE)
+            .expect("GetBucketWebsite response should include Content-Type")
+            .to_str()
+            .expect("GetBucketWebsite Content-Type should be valid ASCII")
+            .to_ascii_lowercase();
         assert!(
-            website_content_type.contains("content-type:") && website_content_type.contains("xml"),
+            website_content_type.contains("xml"),
             "GetBucketWebsite error response should be XML, got content-type: {website_content_type}"
         );
-        let website_body = parse_body(&website_raw);
+        let website_body = website_response
+            .text()
+            .await
+            .expect("Failed to read GetBucketWebsite response body");
         assert!(
             website_body.contains("<Code>NoSuchWebsiteConfiguration</Code>"),
             "GetBucketWebsite should return NoSuchWebsiteConfiguration code, got: {website_body}"
         );
 
-        let delete_raw =
-            execute_s3_awscurl("DELETE", &format!("{}/{bucket}?website=", env.url), &env.access_key, &env.secret_key)
-                .expect("DeleteBucketWebsite HTTP request failed");
-        assert_eq!(parse_status(&delete_raw), Some(204), "DeleteBucketWebsite should return 204");
+        let delete_response = signed_s3_request(
+            Method::DELETE,
+            &format!("{}/{bucket}?website=", env.url),
+            None,
+            None,
+            &env.access_key,
+            &env.secret_key,
+        )
+        .await
+        .expect("DeleteBucketWebsite HTTP request failed");
+        assert_eq!(delete_response.status(), 204, "DeleteBucketWebsite should return 204");
 
         env.stop_server();
     }

crates/e2e_test/src/bucket_stats_regression_test.rs

@@ -0,0 +1,295 @@
+// 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.
+
+//! Regression tests for bucket statistics and data usage accuracy.
+//!
+//! Covers the recurring pattern where bucket statistics (object count, size)
+//! show stale/incorrect values, remain at 0, or oscillate between complete,
+//! partial, and zero. This has regressed 10+ times.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5615: bucket statistics remain unchanged after data expiration
+//! - rustfs#5008: Admin usage reports only one pool
+//! - rustfs#5116: Admin usage reports stale 0/0 for non-empty bucket after upgrade
+//! - rustfs#5055: console object count and size still loading
+//! - rustfs#5010: Storage usage info changed abnormally
+//! - rustfs#3662: Incorrect bucket, object count and size
+//! - rustfs#3898: DataUsageInfo undercounts versioned bucket versions
+//! - rustfs#1012: Object count in the console doesn't change
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{FAST_DATA_USAGE_SCANNER_ENV, RustFSTestEnvironment, awscurl_get, init_logging};
+    use aws_sdk_s3::primitives::ByteStream;
+    use aws_sdk_s3::types::{BucketVersioningStatus, VersioningConfiguration};
+    use rustfs_data_usage::DataUsageInfo;
+    use serial_test::serial;
+    use std::error::Error;
+    use tokio::time::{Duration, sleep};
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    async fn get_data_usage(env: &RustFSTestEnvironment) -> Result<DataUsageInfo, Box<dyn Error + Send + Sync>> {
+        let url = format!("{}/rustfs/admin/v3/datausageinfo", env.url);
+        let resp = awscurl_get(&url, &env.access_key, &env.secret_key).await?;
+        Ok(serde_json::from_str(&resp)?)
+    }
+
+    /// RT-09: Verify bucket object count updates after PUT.
+    ///
+    /// Regression pattern: bucket stats remain at 0 after objects are uploaded
+    /// (rustfs#5055, rustfs#1012).
+    ///
+    /// Steps:
+    /// 1. Create a bucket
+    /// 2. Upload 10 objects
+    /// 3. Query admin data usage API
+    /// 4. Verify object count > 0
+    #[tokio::test]
+    #[serial]
+    async fn test_bucket_object_count_updates_after_put() -> TestResult {
+        init_logging();
+        info!("RT-09: bucket object count updates after PUT");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], FAST_DATA_USAGE_SCANNER_ENV)
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt09-stats-put";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload 10 objects
+        for i in 0..10 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(format!("stat-obj-{i:04}.txt"))
+                .body(ByteStream::from_static(b"statistical data"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        // Wait for scanner to process (up to 90 seconds)
+        let mut found_nonzero = false;
+        let mut last_query_error = None;
+        for attempt in 0..18 {
+            sleep(Duration::from_secs(5)).await;
+
+            let usage = match get_data_usage(&env).await {
+                Ok(usage) => {
+                    last_query_error = None;
+                    usage
+                }
+                Err(err) => {
+                    last_query_error = Some(err.to_string());
+                    continue;
+                }
+            };
+            if let Some(bucket_usage) = usage.buckets_usage.get(bucket) {
+                info!("  attempt {attempt}: objectsCount = {}", bucket_usage.objects_count);
+                if bucket_usage.objects_count >= 10 {
+                    found_nonzero = true;
+                    break;
+                }
+            }
+        }
+
+        assert!(
+            found_nonzero,
+            "RT-09 FAIL: bucket object count did not update after PUT 10 objects (regression: stats stuck at 0); last query error: {}",
+            last_query_error.as_deref().unwrap_or("none")
+        );
+
+        info!("RT-09 PASS: bucket object count updates after PUT");
+        Ok(())
+    }
+
+    /// RT-09b: Verify bucket stats update after DELETE.
+    ///
+    /// Regression pattern: stats remain unchanged after objects are deleted
+    /// (rustfs#5615).
+    #[tokio::test]
+    #[serial]
+    async fn test_bucket_object_count_updates_after_delete() -> TestResult {
+        init_logging();
+        info!("RT-09b: bucket object count updates after DELETE");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], FAST_DATA_USAGE_SCANNER_ENV)
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt09b-stats-delete";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload 5 objects
+        for i in 0..5 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(format!("del-stat-{i}.txt"))
+                .body(ByteStream::from_static(b"data"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        let mut found_nonzero = false;
+        for attempt in 0..18 {
+            sleep(Duration::from_secs(5)).await;
+
+            if let Ok(usage) = get_data_usage(&env).await
+                && let Some(bucket_usage) = usage.buckets_usage.get(bucket)
+            {
+                info!("  baseline attempt {attempt}: objectsCount = {}", bucket_usage.objects_count);
+                if bucket_usage.objects_count >= 5 {
+                    found_nonzero = true;
+                    break;
+                }
+            }
+        }
+        assert!(found_nonzero, "RT-09b setup failed: scanner did not observe the 5 uploaded objects");
+
+        // Delete all objects
+        for i in 0..5 {
+            client
+                .delete_object()
+                .bucket(bucket)
+                .key(format!("del-stat-{i}.txt"))
+                .send()
+                .await
+                .expect("delete object");
+        }
+
+        // Wait for scanner to update stats (up to 90 seconds)
+        let mut found_zero = false;
+        let mut last_query_error = None;
+        for attempt in 0..18 {
+            sleep(Duration::from_secs(5)).await;
+
+            let usage = match get_data_usage(&env).await {
+                Ok(usage) => {
+                    last_query_error = None;
+                    usage
+                }
+                Err(err) => {
+                    last_query_error = Some(err.to_string());
+                    continue;
+                }
+            };
+            if let Some(bucket_usage) = usage.buckets_usage.get(bucket) {
+                info!("  attempt {attempt}: objectsCount = {}", bucket_usage.objects_count);
+                if bucket_usage.objects_count == 0 {
+                    found_zero = true;
+                    break;
+                }
+            }
+        }
+
+        assert!(
+            found_zero,
+            "RT-09b FAIL: bucket object count did not update to 0 after deleting all objects (regression rustfs#5615); last query error: {}",
+            last_query_error.as_deref().unwrap_or("none")
+        );
+
+        info!("RT-09b PASS: bucket object count updates to 0 after DELETE");
+        Ok(())
+    }
+
+    /// RT-09c: Verify versioned bucket stats count all versions.
+    ///
+    /// Regression pattern: DataUsageInfo undercounts versioned bucket versions
+    /// and delete markers (rustfs#3898).
+    #[tokio::test]
+    #[serial]
+    async fn test_versioned_bucket_stats_count_all_versions() -> TestResult {
+        init_logging();
+        info!("RT-09c: versioned bucket stats count all versions");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt09c-versioned-stats";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        client
+            .put_bucket_versioning()
+            .bucket(bucket)
+            .versioning_configuration(
+                VersioningConfiguration::builder()
+                    .status(BucketVersioningStatus::Enabled)
+                    .build(),
+            )
+            .send()
+            .await
+            .expect("enable versioning");
+
+        // Create 3 versions of the same object
+        for i in 0..3 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key("multi-version.txt")
+                .body(ByteStream::from(format!("version-{i}").into_bytes()))
+                .send()
+                .await
+                .expect("put version");
+        }
+
+        // Create a delete marker
+        client
+            .delete_object()
+            .bucket(bucket)
+            .key("multi-version.txt")
+            .send()
+            .await
+            .expect("create delete marker");
+
+        // Verify versions via API (immediate, no scanner wait)
+        let versions = client
+            .list_object_versions()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list versions");
+
+        assert_eq!(
+            versions.versions().len(),
+            3,
+            "RT-09c FAIL: expected 3 versions, found {}",
+            versions.versions().len()
+        );
+        assert_eq!(
+            versions.delete_markers().len(),
+            1,
+            "RT-09c FAIL: expected 1 delete marker, found {}",
+            versions.delete_markers().len()
+        );
+
+        info!("RT-09c PASS: versioned bucket correctly tracks all versions and delete markers");
+        Ok(())
+    }
+}

crates/e2e_test/src/common.rs

@@ -47,11 +47,34 @@ use walkdir::WalkDir;
 pub const DEFAULT_ACCESS_KEY: &str = "rustfsadmin";
 pub const DEFAULT_SECRET_KEY: &str = "rustfsadmin";
 pub const ENV_RUSTFS_BUILD_FEATURES: &str = "RUSTFS_BUILD_FEATURES";
+pub(crate) const FAST_DATA_USAGE_SCANNER_ENV: &[(&str, &str)] =
+    &[("RUSTFS_SCANNER_CYCLE", "1"), ("RUSTFS_SCANNER_START_DELAY_SECS", "0")];
 pub const TEST_BUCKET: &str = "e2e-test-bucket";
 const RUSTFS_FULL_FEATURE: &str = "full";
 
-fn build_test_s3_config(endpoint_url: &str, access_key: &str, secret_key: &str, provider_name: &'static str) -> Config {
-    let credentials = Credentials::new(access_key, secret_key, None, None, provider_name);
+fn capture_log_path(log_dir: &Path, temp_dir: &str) -> Option<PathBuf> {
+    let temp_name = Path::new(temp_dir).file_name()?.to_string_lossy();
+    Some(log_dir.join(format!("{temp_name}.log")))
+}
+
+fn configured_capture_log_path(temp_dir: &str) -> Option<String> {
+    let log_dir = std::env::var_os("RUSTFS_E2E_LOG_DIR")?;
+    if stdfs::create_dir_all(&log_dir).is_err() {
+        warn!(?log_dir, "failed to create configured E2E server log directory");
+        return None;
+    }
+
+    capture_log_path(Path::new(&log_dir), temp_dir).map(|path| path.to_string_lossy().into_owned())
+}
+
+pub(crate) fn build_test_s3_config(
+    endpoint_url: &str,
+    access_key: &str,
+    secret_key: &str,
+    session_token: Option<&str>,
+    provider_name: &'static str,
+) -> Config {
+    let credentials = Credentials::new(access_key, secret_key, session_token.map(str::to_owned), None, provider_name);
     let mut config = Config::builder()
         .credentials_provider(credentials)
         .region(Region::new("us-east-1"))
@@ -66,6 +89,33 @@ fn build_test_s3_config(endpoint_url: &str, access_key: &str, secret_key: &str,
     config.build()
 }
 
+pub(crate) fn build_test_sts_client(
+    endpoint_url: &str,
+    access_key: &str,
+    secret_key: &str,
+    session_token: Option<&str>,
+    provider_name: &'static str,
+) -> aws_sdk_sts::Client {
+    let mut config = aws_sdk_sts::Config::builder()
+        .credentials_provider(aws_sdk_sts::config::Credentials::new(
+            access_key,
+            secret_key,
+            session_token.map(str::to_owned),
+            None,
+            provider_name,
+        ))
+        .region(aws_sdk_sts::config::Region::new("us-east-1"))
+        .endpoint_url(endpoint_url)
+        .retry_config(aws_sdk_sts::config::retry::RetryConfig::standard().with_max_attempts(1))
+        .behavior_version_latest();
+
+    if endpoint_url.starts_with("http://") {
+        config = config.http_client(SmithyHttpClientBuilder::new().build_http());
+    }
+
+    aws_sdk_sts::Client::from_conf(config.build())
+}
+
 pub fn workspace_root() -> PathBuf {
     let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     path.pop(); // e2e_test
@@ -80,6 +130,38 @@ pub fn local_http_client() -> HttpClient {
         .expect("failed to build local reqwest client")
 }
 
+pub(crate) async fn signed_s3_request(
+    method: http::Method,
+    url: &str,
+    body: Option<String>,
+    content_type: Option<&str>,
+    access_key: &str,
+    secret_key: &str,
+) -> Result<reqwest::Response, Box<dyn std::error::Error + Send + Sync>> {
+    let uri = url.parse::<http::Uri>()?;
+    let authority = uri.authority().ok_or("S3 URL missing authority")?.to_string();
+    let mut request = http::Request::builder()
+        .method(method.clone())
+        .uri(uri)
+        .header(HOST, authority)
+        .header("x-amz-content-sha256", UNSIGNED_PAYLOAD);
+    if let Some(content_type) = content_type {
+        request = request.header(CONTENT_TYPE, content_type);
+    }
+
+    let content_length = i64::try_from(body.as_ref().map_or(0, String::len)).map_err(|_| "S3 request body is too large")?;
+    let signed = sign_v4(request.body(Body::empty())?, content_length, access_key, secret_key, "", "us-east-1");
+
+    let mut request = local_http_client().request(method, url);
+    for (name, value) in signed.headers() {
+        request = request.header(name, value);
+    }
+    if let Some(body) = body {
+        request = request.body(body);
+    }
+    Ok(request.send().await?)
+}
+
 /// Signs and sends an admin HTTP request with the given credentials.
 pub(crate) async fn admin_request(
     base_url: &str,
@@ -90,28 +172,8 @@ pub(crate) async fn admin_request(
     secret_key: &str,
 ) -> Result<(StatusCode, String), Box<dyn std::error::Error + Send + Sync>> {
     let url = format!("{base_url}{path_and_query}");
-    let uri = url.parse::<http::Uri>()?;
-    let authority = uri.authority().ok_or("admin URL missing authority")?.to_string();
-    let mut request = http::Request::builder()
-        .method(method.clone())
-        .uri(uri)
-        .header(HOST, authority)
-        .header("x-amz-content-sha256", UNSIGNED_PAYLOAD);
-    if body.is_some() {
-        request = request.header(CONTENT_TYPE, "application/json");
-    }
-
-    let content_length = i64::try_from(body.as_ref().map_or(0, String::len)).map_err(|_| "admin request body is too large")?;
-    let signed = sign_v4(request.body(Body::empty())?, content_length, access_key, secret_key, "", "us-east-1");
-
-    let mut request = local_http_client().request(method, &url);
-    for (name, value) in signed.headers() {
-        request = request.header(name, value);
-    }
-    if let Some(body) = body {
-        request = request.body(body);
-    }
-    let response = request.send().await?;
+    let content_type = body.as_ref().map(|_| "application/json");
+    let response = signed_s3_request(method, &url, body, content_type, access_key, secret_key).await?;
     let status = response.status();
     let body = response.text().await?;
     Ok((status, body))
@@ -361,6 +423,7 @@ impl RustFSTestEnvironment {
     pub async fn new() -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
         let temp_dir = format!("/tmp/rustfs_e2e_test_{}", Uuid::new_v4());
         fs::create_dir_all(&temp_dir).await?;
+        let capture_log_path = configured_capture_log_path(&temp_dir);
 
         // Use a unique port for each test environment
         let port = Self::find_available_port().await?;
@@ -374,7 +437,7 @@ impl RustFSTestEnvironment {
             access_key: DEFAULT_ACCESS_KEY.to_string(),
             secret_key: DEFAULT_SECRET_KEY.to_string(),
             process: None,
-            capture_log_path: None,
+            capture_log_path,
         })
     }
 
@@ -382,6 +445,7 @@ impl RustFSTestEnvironment {
     pub async fn with_address(address: &str) -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
         let temp_dir = format!("/tmp/rustfs_e2e_test_{}", Uuid::new_v4());
         fs::create_dir_all(&temp_dir).await?;
+        let capture_log_path = configured_capture_log_path(&temp_dir);
 
         let url = format!("http://{address}");
 
@@ -392,7 +456,7 @@ impl RustFSTestEnvironment {
             access_key: DEFAULT_ACCESS_KEY.to_string(),
             secret_key: DEFAULT_SECRET_KEY.to_string(),
             process: None,
-            capture_log_path: None,
+            capture_log_path,
         })
     }
 
@@ -547,7 +611,12 @@ impl RustFSTestEnvironment {
 
     /// Create an AWS S3 client configured for this RustFS instance
     pub fn create_s3_client(&self) -> Client {
-        Client::from_conf(build_test_s3_config(&self.url, &self.access_key, &self.secret_key, "e2e-test"))
+        self.create_s3_client_with_credentials(&self.access_key, &self.secret_key)
+    }
+
+    /// Create an AWS S3 client with explicit credentials for this RustFS instance.
+    pub fn create_s3_client_with_credentials(&self, access_key: &str, secret_key: &str) -> Client {
+        Client::from_conf(build_test_s3_config(&self.url, access_key, secret_key, None, "e2e-test"))
     }
 
     /// Create test bucket
@@ -1279,6 +1348,7 @@ impl RustFSTestClusterEnvironment {
             &self.nodes[node_idx].url,
             &self.access_key,
             &self.secret_key,
+            None,
             "cluster-test",
         )))
     }
@@ -1392,6 +1462,14 @@ mod tests {
         assert_eq!(normalize_rustfs_build_features(" , "), None);
     }
 
+    #[test]
+    fn capture_log_path_uses_temp_directory_basename() {
+        assert_eq!(
+            capture_log_path(Path::new("/tmp/e2e-logs"), "/tmp/rustfs_e2e_test_abc"),
+            Some(PathBuf::from("/tmp/e2e-logs/rustfs_e2e_test_abc.log"))
+        );
+    }
+
     #[test]
     fn full_feature_enables_any_required_feature() {
         assert!(rustfs_build_feature_enabled(Some("full"), "sftp"));

crates/e2e_test/src/data_usage_test.rs

@@ -18,7 +18,7 @@ use rustfs_data_usage::DataUsageInfo;
 use serial_test::serial;
 use tokio::time::{Duration, sleep};
 
-use crate::common::{RustFSTestEnvironment, TEST_BUCKET, awscurl_get, init_logging};
+use crate::common::{FAST_DATA_USAGE_SCANNER_ENV, RustFSTestEnvironment, TEST_BUCKET, awscurl_get, init_logging};
 
 async fn get_data_usage_info(env: &RustFSTestEnvironment) -> Result<DataUsageInfo, Box<dyn std::error::Error + Send + Sync>> {
     let url = format!("{}/rustfs/admin/v3/datausageinfo", env.url);
@@ -35,16 +35,26 @@ where
     F: FnMut(&DataUsageInfo) -> bool,
 {
     let mut last_usage = DataUsageInfo::default();
+    let mut last_query_error = None;
     for _ in 0..45 {
-        let usage = get_data_usage_info(env).await?;
-        if usage.buckets_usage.contains_key(bucket) && predicate(&usage) {
-            return Ok(usage);
+        match get_data_usage_info(env).await {
+            Ok(usage) => {
+                last_query_error = None;
+                if usage.buckets_usage.contains_key(bucket) && predicate(&usage) {
+                    return Ok(usage);
+                }
+                last_usage = usage;
+            }
+            Err(err) => last_query_error = Some(err.to_string()),
         }
-        last_usage = usage;
         sleep(Duration::from_secs(2)).await;
     }
 
-    Err(format!("bucket usage did not converge for {bucket}; last usage: {last_usage:?}").into())
+    Err(format!(
+        "bucket usage did not converge for {bucket}; last usage: {last_usage:?}; last query error: {}",
+        last_query_error.as_deref().unwrap_or("none")
+    )
+    .into())
 }
 
 /// Regression test for data usage accuracy (issue #1012).
@@ -56,7 +66,7 @@ async fn data_usage_reports_all_objects() -> Result<(), Box<dyn std::error::Erro
     init_logging();
 
     let mut env = RustFSTestEnvironment::new().await?;
-    env.start_rustfs_server(vec![]).await?;
+    env.start_rustfs_server_with_env(vec![], FAST_DATA_USAGE_SCANNER_ENV).await?;
 
     let client = env.create_s3_client();
 
@@ -74,8 +84,14 @@ async fn data_usage_reports_all_objects() -> Result<(), Box<dyn std::error::Erro
             .await?;
     }
 
-    // Query admin data usage API
-    let usage = get_data_usage_info(&env).await?;
+    let usage = wait_for_bucket_usage(&env, TEST_BUCKET, |usage| {
+        usage
+            .buckets_usage
+            .get(TEST_BUCKET)
+            .map(|bucket_usage| usage.objects_total_count >= 1000 && bucket_usage.objects_count >= 1000)
+            .unwrap_or(false)
+    })
+    .await?;
 
     // Assert total object count and per-bucket count are not truncated
     let bucket_usage = usage
@@ -108,7 +124,7 @@ async fn data_usage_reports_versioned_objects_and_delete_markers() -> Result<(),
     init_logging();
 
     let mut env = RustFSTestEnvironment::new().await?;
-    env.start_rustfs_server(vec![]).await?;
+    env.start_rustfs_server_with_env(vec![], FAST_DATA_USAGE_SCANNER_ENV).await?;
 
     let client = env.create_s3_client();
     let bucket = "data-usage-versioned";
@@ -184,8 +200,8 @@ async fn data_usage_reports_versioned_objects_and_delete_markers() -> Result<(),
     assert_eq!(usage.versions_total_count, 3, "total version count should match bucket usage");
     assert_eq!(usage.delete_markers_total_count, 1, "total delete marker count should match bucket usage");
 
-    env.stop_server();
-    env.start_rustfs_server(vec![]).await?;
+    env.restart_server_preserving_data(vec![], FAST_DATA_USAGE_SCANNER_ENV)
+        .await?;
 
     let restarted_usage = wait_for_bucket_usage(&env, bucket, |usage| {
         usage

crates/e2e_test/src/delete_regression_test.rs

@@ -0,0 +1,445 @@
+// 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.
+
+//! Regression tests for object delete operations.
+//!
+//! Covers the recurring pattern where DELETE succeeds at the API level but the
+//! object remains visible in LIST, or deleted objects reappear after restart,
+//! or versioned delete operations fail with FileAccessDenied.
+//! This has regressed 15+ times across the entire release history.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5375: delete object in a bucket list api also exist this object
+//! - rustfs#5349: The deleted bucket was rebuilt after some time
+//! - rustfs#5339: data not delete in Object Lock bucket
+//! - rustfs#5029: Node Does Not Remove Files After Reconnect to Cluster
+//! - rustfs#4978: DELETE fails with InternalError/FileAccessDenied on beta 10
+//! - rustfs#760: Cannot delete a versioned bucket
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestEnvironment, init_logging};
+    use aws_sdk_s3::primitives::ByteStream;
+    use aws_sdk_s3::types::{BucketVersioningStatus, Delete, ObjectIdentifier, VersioningConfiguration};
+    use serial_test::serial;
+    use std::error::Error;
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    /// RT-05: Verify DELETE → LIST → HEAD consistency.
+    ///
+    /// Regression pattern: DELETE returns 200 but the object remains in LIST.
+    /// Covers rustfs#5375.
+    ///
+    /// Steps:
+    /// 1. Create a bucket and upload an object
+    /// 2. Verify the object is in LIST
+    /// 3. DELETE the object
+    /// 4. Verify the object is NOT in LIST
+    /// 5. Verify HEAD returns 404
+    #[tokio::test]
+    #[serial]
+    async fn test_delete_removes_object_from_list() -> TestResult {
+        init_logging();
+        info!("RT-05: delete removes object from list");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05-delete-consistency";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload an object
+        client
+            .put_object()
+            .bucket(bucket)
+            .key("to-delete.txt")
+            .body(ByteStream::from_static(b"will be deleted"))
+            .send()
+            .await
+            .expect("put object");
+
+        // Verify it appears in LIST
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list objects before delete");
+
+        assert!(
+            list.contents()
+                .iter()
+                .map(|o| o.key().unwrap_or(""))
+                .any(|key| key == "to-delete.txt"),
+            "RT-05 FAIL: object not in LIST before delete"
+        );
+
+        // DELETE
+        client
+            .delete_object()
+            .bucket(bucket)
+            .key("to-delete.txt")
+            .send()
+            .await
+            .expect("delete object");
+
+        // Verify NOT in LIST
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list objects after delete");
+
+        assert!(
+            !list
+                .contents()
+                .iter()
+                .map(|o| o.key().unwrap_or(""))
+                .any(|key| key == "to-delete.txt"),
+            "RT-05 FAIL: deleted object still in LIST (regression rustfs#5375)"
+        );
+
+        // Verify HEAD returns 404
+        let head = client.head_object().bucket(bucket).key("to-delete.txt").send().await;
+
+        assert!(head.is_err(), "RT-05 FAIL: HEAD on deleted object should return error, got success");
+
+        info!("RT-05 PASS: delete correctly removes object from LIST and HEAD");
+        Ok(())
+    }
+
+    /// RT-05c: Verify batch delete (DeleteObjects) consistency.
+    ///
+    /// Regression pattern: batch delete returns success but some objects
+    /// remain in LIST.
+    #[tokio::test]
+    #[serial]
+    async fn test_batch_delete_removes_all_objects() -> TestResult {
+        init_logging();
+        info!("RT-05c: batch delete removes all objects");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05c-batch-delete";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload multiple objects
+        let keys: Vec<String> = (0..5).map(|i| format!("batch-{i:04}.txt")).collect();
+        for key in &keys {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(key)
+                .body(ByteStream::from_static(b"batch-delete-me"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        // Verify all in LIST
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list before batch delete");
+
+        assert_eq!(
+            list.contents().len(),
+            5,
+            "RT-05c FAIL: expected 5 objects before batch delete, found {}",
+            list.contents().len()
+        );
+
+        // Batch delete
+        let objects: Vec<ObjectIdentifier> = keys
+            .iter()
+            .map(|k| ObjectIdentifier::builder().key(k).build().expect("build object id"))
+            .collect();
+
+        client
+            .delete_objects()
+            .bucket(bucket)
+            .delete(Delete::builder().set_objects(Some(objects)).build().expect("build delete"))
+            .send()
+            .await
+            .expect("batch delete");
+
+        // Verify all removed
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list after batch delete");
+
+        assert!(
+            list.contents().is_empty(),
+            "RT-05c FAIL: {} objects remain after batch delete (regression: delete objects not fully applied)",
+            list.contents().len()
+        );
+
+        info!("RT-05c PASS: batch delete removes all objects");
+        Ok(())
+    }
+
+    /// RT-05d: Verify versioned delete → permanent delete → object gone.
+    ///
+    /// Covers the pattern where permanent deletion of a specific version
+    /// fails with FileAccessDenied (rustfs#4978).
+    #[tokio::test]
+    #[serial]
+    async fn test_versioned_permanent_delete() -> TestResult {
+        init_logging();
+        info!("RT-05d: versioned permanent delete");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05d-permanent-delete";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        client
+            .put_bucket_versioning()
+            .bucket(bucket)
+            .versioning_configuration(
+                VersioningConfiguration::builder()
+                    .status(BucketVersioningStatus::Enabled)
+                    .build(),
+            )
+            .send()
+            .await
+            .expect("enable versioning");
+
+        // Upload a single object (single version)
+        let put_resp = client
+            .put_object()
+            .bucket(bucket)
+            .key("single-version.txt")
+            .body(ByteStream::from_static(b"to-be-permanently-deleted"))
+            .send()
+            .await
+            .expect("put object");
+
+        let version_id = put_resp.version_id().expect("version ID should be present").to_string();
+
+        // Permanently delete the specific version (rustfs#4978: FileAccessDenied)
+        client
+            .delete_object()
+            .bucket(bucket)
+            .key("single-version.txt")
+            .version_id(&version_id)
+            .send()
+            .await
+            .expect("permanent delete should succeed (regression rustfs#4978)");
+
+        // Verify the object is completely gone
+        let versions = client
+            .list_object_versions()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list versions");
+
+        assert!(
+            versions.versions().is_empty(),
+            "RT-05d FAIL: version still present after permanent delete"
+        );
+
+        info!("RT-05d PASS: versioned permanent delete succeeds");
+        Ok(())
+    }
+
+    /// RT-05e: Verify delete marker + version history interaction.
+    ///
+    /// Covers the pattern where creating a delete marker and then listing
+    /// versions shows incorrect state (rustfs#760).
+    #[tokio::test]
+    #[serial]
+    async fn test_versioned_delete_marker_and_list_consistency() -> TestResult {
+        init_logging();
+        info!("RT-05e: versioned delete marker and list consistency");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05e-dm-consistency";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        client
+            .put_bucket_versioning()
+            .bucket(bucket)
+            .versioning_configuration(
+                VersioningConfiguration::builder()
+                    .status(BucketVersioningStatus::Enabled)
+                    .build(),
+            )
+            .send()
+            .await
+            .expect("enable versioning");
+
+        // Create 3 versions
+        for i in 0..3 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key("history.txt")
+                .body(ByteStream::from(format!("v{i}").into_bytes()))
+                .send()
+                .await
+                .expect("put version");
+        }
+
+        // Create a delete marker
+        let del = client
+            .delete_object()
+            .bucket(bucket)
+            .key("history.txt")
+            .send()
+            .await
+            .expect("delete (create marker)");
+
+        assert!(del.delete_marker().unwrap_or(false), "RT-05e FAIL: should have created a delete marker");
+
+        // ListObjectVersions should show 3 versions + 1 delete marker
+        let versions = client
+            .list_object_versions()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list versions");
+
+        assert_eq!(
+            versions.versions().len(),
+            3,
+            "RT-05e FAIL: expected 3 versions, found {}",
+            versions.versions().len()
+        );
+        assert_eq!(
+            versions.delete_markers().len(),
+            1,
+            "RT-05e FAIL: expected 1 delete marker, found {}",
+            versions.delete_markers().len()
+        );
+
+        // Now delete the delete marker (restore the object)
+        let dm_version = &versions.delete_markers()[0];
+        client
+            .delete_object()
+            .bucket(bucket)
+            .key("history.txt")
+            .version_id(dm_version.version_id().expect("dm version id"))
+            .send()
+            .await
+            .expect("delete delete-marker");
+
+        // HEAD should succeed now (latest version is accessible)
+        let head = client.head_object().bucket(bucket).key("history.txt").send().await;
+
+        assert!(head.is_ok(), "RT-05e FAIL: HEAD should succeed after removing delete marker");
+
+        info!("RT-05e PASS: versioned delete marker and list consistency");
+        Ok(())
+    }
+
+    /// RT-05f: Verify object deletion does not leave orphan data on disk.
+    ///
+    /// Regression pattern: after delete, the object data files remain on disk
+    /// (rustfs#5029: Node Does Not Remove Files After Reconnect).
+    #[tokio::test]
+    #[serial]
+    async fn test_delete_removes_object_head_returns_404() -> TestResult {
+        init_logging();
+        info!("RT-05f: delete → HEAD 404 consistency");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05f-delete-head";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload, delete, verify HEAD returns 404
+        let keys = vec!["small.txt", "medium.txt", "with-slash.txt", "special+chars.txt"];
+
+        for key in &keys {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(*key)
+                .body(ByteStream::from_static(b"delete-me"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        for key in &keys {
+            client
+                .delete_object()
+                .bucket(bucket)
+                .key(*key)
+                .send()
+                .await
+                .expect("delete object");
+        }
+
+        // All HEAD requests should return 404
+        for key in &keys {
+            let head = client.head_object().bucket(bucket).key(*key).send().await;
+
+            assert!(head.is_err(), "RT-05f FAIL: HEAD on deleted key '{key}' should return error");
+        }
+
+        // LIST should be empty
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list after all deletes");
+
+        assert!(
+            list.contents().is_empty(),
+            "RT-05f FAIL: {} objects remain after deleting all",
+            list.contents().len()
+        );
+
+        info!("RT-05f PASS: all deleted objects return 404 on HEAD");
+        Ok(())
+    }
+}

crates/e2e_test/src/distributed_startup_regression_test.rs

@@ -0,0 +1,202 @@
+// 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.
+
+//! Regression tests for distributed cluster startup and quorum.
+//!
+//! Covers the recurring pattern where multi-node clusters fail to start due to
+//! lock quorum issues, DNS resolution delays, or erasure quorum deadlocks.
+//! This has regressed 7+ times.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5416: RustFS cannot cold-start with 2/3 quorum when Pod DNS missing
+//! - rustfs#2945: Distributed mode fails on K8s: erasure quorum deadlock
+//! - rustfs#2794: distributed deployment does not become ready
+//! - rustfs#2601: fresh pod immediately enters FaultyDisk state
+//! - rustfs#4040: Distributed startup can fail lock quorum before AppContext initializes
+//! - rustfs#5655: fix(ecstore): bootstrap fresh four-node clusters reliably
+//! - rustfs#4954: S3/health endpoint unavailability after multi-pool scale-up
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestClusterEnvironment, init_logging};
+    use aws_sdk_s3::primitives::ByteStream;
+    use serial_test::serial;
+    use std::error::Error;
+    use tokio::time::{Duration, sleep};
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    /// RT-10: Verify 4-node cluster starts successfully and all nodes are ready.
+    ///
+    /// Regression pattern: distributed startup fails with quorum deadlock or
+    /// lock acquisition timeout (rustfs#2945, rustfs#5655).
+    ///
+    /// Steps:
+    /// 1. Create a 4-node cluster
+    /// 2. Start all nodes simultaneously
+    /// 3. Verify all nodes report healthy
+    /// 4. Verify S3 operations work through any node
+    #[tokio::test]
+    #[serial]
+    async fn test_four_node_cluster_startup_and_health() -> TestResult {
+        init_logging();
+        info!("RT-10: 4-node cluster startup and health");
+
+        let mut cluster = RustFSTestClusterEnvironment::new(4).await.expect("create 4-node cluster");
+
+        cluster.start().await.expect("start 4-node cluster");
+
+        // Create a bucket and verify it's accessible from all nodes
+        cluster
+            .create_test_bucket("rt10-startup")
+            .await
+            .expect("create bucket on cluster");
+
+        let clients = cluster.create_all_clients().expect("create per-node clients");
+
+        // Verify S3 operations work from every node
+        for (i, client) in clients.iter().enumerate() {
+            client
+                .put_object()
+                .bucket("rt10-startup")
+                .key(format!("from-node-{i}.txt"))
+                .body(ByteStream::from_static(b"hello from node"))
+                .send()
+                .await
+                .unwrap_or_else(|e| panic!("PUT from node {i} failed: {e}"));
+        }
+
+        // Verify all objects are visible from node 0
+        let list = clients[0]
+            .list_objects_v2()
+            .bucket("rt10-startup")
+            .send()
+            .await
+            .expect("list objects from node 0");
+
+        assert_eq!(
+            list.contents().len(),
+            4,
+            "RT-10 FAIL: expected 4 objects (one per node), found {}",
+            list.contents().len()
+        );
+
+        info!("RT-10 PASS: 4-node cluster starts and serves S3 from all nodes");
+        Ok(())
+    }
+
+    /// RT-10b: Verify cluster handles node restart gracefully.
+    ///
+    /// Regression pattern: after a node restart, it cannot rejoin the cluster
+    /// or enters a faulty state (rustfs#2601).
+    #[tokio::test]
+    #[serial]
+    async fn test_cluster_survives_node_restart() -> TestResult {
+        init_logging();
+        info!("RT-10b: cluster survives node restart");
+
+        let mut cluster = RustFSTestClusterEnvironment::new(4).await.expect("create 4-node cluster");
+
+        cluster.start().await.expect("start cluster");
+
+        cluster.create_test_bucket("rt10b-restart").await.expect("create bucket");
+
+        // Write data
+        let clients = cluster.create_all_clients()?;
+        clients[0]
+            .put_object()
+            .bucket("rt10b-restart")
+            .key("before-restart.txt")
+            .body(ByteStream::from_static(b"persistent data"))
+            .send()
+            .await
+            .expect("put object before restart");
+
+        // Stop node 3
+        cluster.stop_node(3).expect("stop node 3");
+        sleep(Duration::from_secs(2)).await;
+
+        // Verify cluster still works with 3/4 nodes (quorum)
+        clients[0]
+            .put_object()
+            .bucket("rt10b-restart")
+            .key("during-offline.txt")
+            .body(ByteStream::from_static(b"written while node 3 down"))
+            .send()
+            .await
+            .expect("PUT should succeed with 3/4 nodes");
+
+        // Restart node 3
+        cluster.start_node(3).await.expect("restart node 3");
+
+        // Wait for node to rejoin
+        sleep(Duration::from_secs(3)).await;
+
+        // Verify the restarted node can serve reads
+        let list = clients[3]
+            .list_objects_v2()
+            .bucket("rt10b-restart")
+            .send()
+            .await
+            .expect("list from restarted node");
+
+        assert!(
+            list.contents().len() >= 2,
+            "RT-10b FAIL: restarted node sees {} objects, expected >= 2",
+            list.contents().len()
+        );
+
+        info!("RT-10b PASS: cluster survives and recovers from node restart");
+        Ok(())
+    }
+
+    /// RT-10c: Verify bucket creation persists across all nodes.
+    ///
+    /// Regression pattern: bucket metadata is not replicated to all nodes,
+    /// causing NoSuchBucket errors on some nodes (rustfs#3191).
+    #[tokio::test]
+    #[serial]
+    async fn test_bucket_visible_from_all_nodes() -> TestResult {
+        init_logging();
+        info!("RT-10c: bucket visible from all nodes");
+
+        let mut cluster = RustFSTestClusterEnvironment::new(4).await.expect("create 4-node cluster");
+
+        cluster.start().await.expect("start cluster");
+
+        cluster
+            .create_test_bucket("rt10c-bucket-visibility")
+            .await
+            .expect("create bucket");
+
+        let clients = cluster.create_all_clients()?;
+
+        // Verify the bucket is visible from every node
+        for (i, client) in clients.iter().enumerate() {
+            let resp = client
+                .list_objects_v2()
+                .bucket("rt10c-bucket-visibility")
+                .send()
+                .await
+                .unwrap_or_else(|e| panic!("list from node {i} failed (NoSuchBucket?): {e}"));
+
+            assert!(resp.contents().is_empty(), "RT-10c: fresh bucket should be empty on node {i}");
+        }
+
+        info!("RT-10c PASS: bucket visible from all 4 nodes");
+        Ok(())
+    }
+}

crates/e2e_test/src/fake_s3_target/mod.rs

@@ -574,7 +574,8 @@ fn parse_request(method: &Method, uri: &Uri) -> ParsedRequest {
         (&Method::POST, true) if query.contains_key("uploads") => Operation::CreateMultipartUpload,
         (&Method::POST, true) if upload_id.is_some() => Operation::CompleteMultipartUpload,
         (&Method::DELETE, true) if upload_id.is_some() => Operation::AbortMultipartUpload,
-        (&Method::PUT, true) if only_query_keys(&[]) => Operation::PutObject,
+        // 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,
         (&Method::HEAD, true) if only_query_keys(&["versionId"]) => Operation::HeadObject,
         (&Method::DELETE, true) if only_query_keys(&["versionId"]) => Operation::DeleteObject,

crates/e2e_test/src/inline_fast_path_cluster_test.rs

@@ -1687,6 +1687,44 @@ async fn four_node_inline_storage_and_get_boundaries() -> TestResult {
     Ok(())
 }
 
+#[tokio::test]
+#[serial]
+async fn four_node_empty_legacy_volumes_start_as_fresh() -> TestResult {
+    init_logging();
+
+    let mut cluster = RustFSTestClusterEnvironment::new(4).await?;
+    for data_dir in cluster.nodes.iter().flat_map(|node| &node.data_dirs) {
+        tokio::fs::create_dir_all(Path::new(data_dir).join(".minio.sys")).await?;
+    }
+
+    cluster.start().await?;
+
+    // Starting is not the assertion. The regression is that an empty legacy
+    // `.minio.sys` must be classified as a *fresh* volume, not as an existing
+    // MinIO deployment to adopt or migrate. Pin what that classification leaves
+    // on disk and in the namespace.
+    let buckets = cluster.create_s3_client(0)?.list_buckets().send().await?;
+    assert!(
+        buckets.buckets().is_empty(),
+        "a fresh classification must not adopt buckets from the pre-existing directories, got {:?}",
+        buckets.buckets().iter().filter_map(|b| b.name()).collect::<Vec<_>>()
+    );
+
+    for data_dir in cluster.nodes.iter().flat_map(|node| &node.data_dirs) {
+        assert!(
+            Path::new(data_dir).join(".rustfs.sys").join("format.json").is_file(),
+            "each drive must be formatted as fresh: {data_dir} has no .rustfs.sys/format.json"
+        );
+        let mut legacy = tokio::fs::read_dir(Path::new(data_dir).join(".minio.sys")).await?;
+        assert!(
+            legacy.next_entry().await?.is_none(),
+            "the empty legacy directory must be left untouched, not migrated into: {data_dir}"
+        );
+    }
+
+    Ok(())
+}
+
 #[tokio::test]
 #[serial]
 async fn four_node_inline_fallback_controls() -> TestResult {
@@ -2173,11 +2211,6 @@ async fn four_node_manual_transition_distributed_admission_conflict_reports_stat
             "queue_snapshot.{field} must be readable in terminal status: {terminal}"
         );
     }
-    assert!(
-        cold_tier_object_count(&cold_client).await? < 64,
-        "queue pressure should leave at least one object untransitioned"
-    );
-
     Ok(())
 }
 

crates/e2e_test/src/kms/bucket_default_encryption_test.rs

@@ -21,9 +21,12 @@
 
 use super::common::LocalKMSTestEnvironment;
 use crate::common::{TEST_BUCKET, init_logging};
+use aws_sdk_s3::primitives::ByteStream;
 use aws_sdk_s3::types::{
-    ServerSideEncryption, ServerSideEncryptionByDefault, ServerSideEncryptionConfiguration, ServerSideEncryptionRule,
+    ChecksumAlgorithm, ChecksumMode, CompletedMultipartUpload, CompletedPart, ServerSideEncryption,
+    ServerSideEncryptionByDefault, ServerSideEncryptionConfiguration, ServerSideEncryptionRule,
 };
+use rustfs_rio::{Checksum, ChecksumType};
 use serial_test::serial;
 use tracing::{debug, info, warn};
 
@@ -273,7 +276,7 @@ async fn test_bucket_default_sse_kms_put_object() -> Result<(), Box<dyn std::err
 /// Test 3: When bucket is configured with default encryption, create_multipart_upload should inherit the configuration
 #[tokio::test]
 #[serial]
-async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+async fn test_bucket_default_sse_kms_multipart_crc32() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     init_logging();
     info!("Testing bucket default encryption impact on create_multipart_upload");
 
@@ -309,15 +312,16 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         .await
         .expect("Failed to set bucket encryption");
 
-    // Step 2: Create multipart upload (without specifying encryption parameters)
-    info!("Creating multipart upload (without specifying encryption parameters, should use bucket default configuration)");
-    let test_key = "test-multipart-bucket-default.txt";
+    // Step 2: Declare CRC32 without specifying encryption parameters. The AWS SDK
+    // calculates each UploadPart checksum and sends it as a flexible checksum.
+    info!("Creating CRC32 multipart upload that should use bucket default encryption");
+    let test_key = "test-multipart-bucket-default-crc32.bin";
 
     let create_multipart_response = s3_client
         .create_multipart_upload()
         .bucket(TEST_BUCKET)
         .key(test_key)
-        // Note: No encryption parameters specified here, should use bucket default configuration
+        .checksum_algorithm(ChecksumAlgorithm::Crc32)
         .send()
         .await
         .expect("Failed to create multipart upload");
@@ -343,28 +347,61 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         "create_multipart_upload response should contain correct KMS key ID"
     );
 
-    // Step 3: Upload a part and complete multipart upload
-    info!("Uploading part and completing multipart upload");
-    let test_data = b"test-multipart-bucket-default-encryption-data";
+    // Step 3: Upload two parts. The first is exactly the S3 minimum size so this
+    // follows the same managed SSE-KMS multipart path as issue #5756.
+    const PART_SIZE: usize = 5 * 1024 * 1024;
+    let part1: Vec<u8> = (0..PART_SIZE).map(|i| (i % 251) as u8).collect();
+    let part2: Vec<u8> = (0..1024 * 1024).map(|i| ((i + 17) % 251) as u8).collect();
+    let expected_body: Vec<u8> = part1.iter().chain(&part2).copied().collect();
 
-    // Upload part 1
-    let upload_part_response = s3_client
-        .upload_part()
-        .bucket(TEST_BUCKET)
-        .key(test_key)
-        .upload_id(upload_id)
-        .part_number(1)
-        .body(test_data.to_vec().into())
-        .send()
-        .await
-        .expect("Failed to upload part");
+    let upload_part = |part_number: i32, body: Vec<u8>| {
+        s3_client
+            .upload_part()
+            .bucket(TEST_BUCKET)
+            .key(test_key)
+            .upload_id(upload_id)
+            .part_number(part_number)
+            .checksum_algorithm(ChecksumAlgorithm::Crc32)
+            .body(ByteStream::from(body))
+            .send()
+    };
 
-    let etag = upload_part_response.e_tag().unwrap().to_string();
+    let expected_part1_crc32 = Checksum::new_from_data(ChecksumType::CRC32, &part1)
+        .expect("calculate part 1 CRC32")
+        .encoded;
+    let upload1 = upload_part(1, part1).await.expect("Failed to upload part 1 with CRC32");
+    assert_eq!(
+        upload1.checksum_crc32(),
+        Some(expected_part1_crc32.as_str()),
+        "UploadPart must return the CRC32 calculated over plaintext"
+    );
+
+    let expected_part2_crc32 = Checksum::new_from_data(ChecksumType::CRC32, &part2)
+        .expect("calculate part 2 CRC32")
+        .encoded;
+    let upload2 = upload_part(2, part2).await.expect("Failed to upload part 2 with CRC32");
+    assert_eq!(
+        upload2.checksum_crc32(),
+        Some(expected_part2_crc32.as_str()),
+        "UploadPart must return the CRC32 calculated over plaintext"
+    );
 
     // Complete multipart upload
-    let completed_part = aws_sdk_s3::types::CompletedPart::builder()
-        .part_number(1)
-        .e_tag(&etag)
+    let completed_upload = CompletedMultipartUpload::builder()
+        .parts(
+            CompletedPart::builder()
+                .part_number(1)
+                .e_tag(upload1.e_tag().expect("No ETag for part 1"))
+                .checksum_crc32(upload1.checksum_crc32().expect("No CRC32 for part 1"))
+                .build(),
+        )
+        .parts(
+            CompletedPart::builder()
+                .part_number(2)
+                .e_tag(upload2.e_tag().expect("No ETag for part 2"))
+                .checksum_crc32(upload2.checksum_crc32().expect("No CRC32 for part 2"))
+                .build(),
+        )
         .build();
 
     let complete_multipart_response = s3_client
@@ -372,11 +409,7 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         .bucket(TEST_BUCKET)
         .key(test_key)
         .upload_id(upload_id)
-        .multipart_upload(
-            aws_sdk_s3::types::CompletedMultipartUpload::builder()
-                .parts(completed_part)
-                .build(),
-        )
+        .multipart_upload(completed_upload)
         .send()
         .await
         .expect("Failed to complete multipart upload");
@@ -400,6 +433,7 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         .get_object()
         .bucket(TEST_BUCKET)
         .key(test_key)
+        .checksum_mode(ChecksumMode::Enabled)
         .send()
         .await
         .expect("Failed to get object");
@@ -410,6 +444,13 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         Some(&ServerSideEncryption::AwsKms),
         "Final object should contain SSE-KMS encryption information"
     );
+    if let Some(completed_crc32) = complete_multipart_response.checksum_crc32() {
+        assert_eq!(
+            get_response.checksum_crc32(),
+            Some(completed_crc32),
+            "GetObject should return the persisted composite CRC32 when completion reports it"
+        );
+    }
 
     // Verify data integrity
     let downloaded_data = get_response
@@ -418,7 +459,11 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         .await
         .expect("Failed to collect body")
         .into_bytes();
-    assert_eq!(&downloaded_data[..], test_data, "Downloaded data should match original data");
+    assert_eq!(
+        downloaded_data.as_ref(),
+        expected_body.as_slice(),
+        "Downloaded data should match the uploaded multipart body"
+    );
 
     // Cleanup is handled automatically when the test environment is dropped
     info!("Test passed: bucket default encryption correctly applied to multipart upload");

crates/e2e_test/src/kms/copy_object_self_copy_sse_test.rs

@@ -0,0 +1,351 @@
+// 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.
+
+//! Regression test: a same-key CopyObject that only rewrites metadata must never re-key a
+//! managed-SSE (SSE-S3 / SSE-KMS) object.
+//!
+//! On an **unversioned** bucket the handler marks a same-name copy `metadata_only`, and the
+//! store layer then updates `xl.meta` in place without touching the data blocks. The handler
+//! nevertheless strips the source encryption metadata and generates a *fresh* DEK for the
+//! destination. Combining the two writes "new DEK + old ciphertext": the object is permanently
+//! undecryptable. The fix forces a full data rewrite whenever the copy re-derives managed
+//! encryption material, so the stored bytes always match the key metadata beside them.
+//!
+//! Companion to `copy_object_version_restore_sse_test` (issue #4238), which pins the same
+//! invariant for the versioned historical-restore path.
+
+use super::common::{LocalKMSTestEnvironment, create_key_with_specific_id};
+use crate::common::init_logging;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{
+    MetadataDirective, ServerSideEncryption, ServerSideEncryptionByDefault, ServerSideEncryptionConfiguration,
+    ServerSideEncryptionRule,
+};
+use serial_test::serial;
+use tracing::info;
+
+#[tokio::test]
+#[serial]
+async fn test_metadata_replace_self_copy_of_sse_object_stays_decryptable() {
+    init_logging();
+    info!("same-key CopyObject with REPLACE metadata must not re-key an SSE-S3 object");
+
+    let mut kms_env = LocalKMSTestEnvironment::new().await.expect("failed to create local KMS env");
+    let default_key_id = "rustfs-e2e-test-default-key";
+    let keys_dir = kms_env.kms_keys_dir.clone();
+    create_key_with_specific_id(&keys_dir, default_key_id)
+        .await
+        .expect("failed to create local KMS key");
+    kms_env
+        .base_env
+        .start_rustfs_server_with_env(
+            vec![
+                "--kms-enable",
+                "--kms-backend",
+                "local",
+                "--kms-key-dir",
+                &keys_dir,
+                "--kms-default-key-id",
+                default_key_id,
+            ],
+            &[("RUSTFS_KMS_ALLOW_INSECURE_DEV_DEFAULTS", "true")],
+        )
+        .await
+        .expect("failed to start RustFS with local KMS");
+    tokio::time::sleep(tokio::time::Duration::from_secs(3)).await;
+
+    let client = kms_env.base_env.create_s3_client();
+    // Deliberately an UNVERSIONED bucket: that is the branch where the store layer can service
+    // the self-copy as a pure metadata update.
+    let bucket = "copy-object-self-copy-sse-test";
+    let key = "secrets/report.txt";
+
+    client
+        .create_bucket()
+        .bucket(bucket)
+        .send()
+        .await
+        .expect("failed to create bucket");
+
+    // Content long enough that a truncated/garbled decrypt cannot coincidentally match.
+    let content = b"encrypted payload that must survive a metadata-only self copy -- 0123456789";
+    let put = client
+        .put_object()
+        .bucket(bucket)
+        .key(key)
+        .content_type("text/plain; charset=utf-8")
+        .metadata("stage", "before")
+        .server_side_encryption(ServerSideEncryption::Aes256)
+        .body(ByteStream::from_static(content))
+        .send()
+        .await
+        .expect("PUT failed");
+    assert_eq!(put.server_side_encryption(), Some(&ServerSideEncryption::Aes256));
+
+    // Copy the object onto itself, replacing user metadata. This is the `mc cp --attr` /
+    // "edit metadata in place" shape that AWS supports on an existing object.
+    let copy_out = client
+        .copy_object()
+        .bucket(bucket)
+        .key(key)
+        .copy_source(format!("{bucket}/{key}"))
+        .metadata_directive(MetadataDirective::Replace)
+        .content_type("text/plain; charset=utf-8")
+        .metadata("stage", "after")
+        .server_side_encryption(ServerSideEncryption::Aes256)
+        .send()
+        .await
+        .expect("same-key CopyObject with REPLACE metadata must succeed");
+    assert_eq!(copy_out.server_side_encryption(), Some(&ServerSideEncryption::Aes256));
+
+    // The object must still decrypt to the original plaintext. Before the fix the stored
+    // ciphertext was left untouched while the metadata carried a brand-new DEK, so this GET
+    // either failed outright or returned garbage.
+    let get = client
+        .get_object()
+        .bucket(bucket)
+        .key(key)
+        .send()
+        .await
+        .expect("GET after self-copy failed: the object was re-keyed without rewriting the ciphertext");
+    assert_eq!(get.server_side_encryption(), Some(&ServerSideEncryption::Aes256));
+    assert_eq!(
+        get.metadata().and_then(|m| m.get("stage")),
+        Some(&"after".to_string()),
+        "REPLACE metadata must take effect"
+    );
+    let body = get.body.collect().await.expect("collect body").into_bytes();
+    assert_eq!(
+        body.as_ref(),
+        content,
+        "object must still decrypt to the original plaintext after a metadata-only self copy"
+    );
+
+    kms_env.base_env.stop_server();
+}
+
+#[tokio::test]
+#[serial]
+async fn test_metadata_replace_self_copy_dropping_sse_rewrites_plaintext() {
+    init_logging();
+    info!("same-key CopyObject that drops SSE must rewrite the data, not orphan the ciphertext");
+
+    let mut kms_env = LocalKMSTestEnvironment::new().await.expect("failed to create local KMS env");
+    let default_key_id = "rustfs-e2e-test-default-key";
+    let keys_dir = kms_env.kms_keys_dir.clone();
+    create_key_with_specific_id(&keys_dir, default_key_id)
+        .await
+        .expect("failed to create local KMS key");
+    kms_env
+        .base_env
+        .start_rustfs_server_with_env(
+            vec![
+                "--kms-enable",
+                "--kms-backend",
+                "local",
+                "--kms-key-dir",
+                &keys_dir,
+                "--kms-default-key-id",
+                default_key_id,
+            ],
+            &[("RUSTFS_KMS_ALLOW_INSECURE_DEV_DEFAULTS", "true")],
+        )
+        .await
+        .expect("failed to start RustFS with local KMS");
+    tokio::time::sleep(tokio::time::Duration::from_secs(3)).await;
+
+    let client = kms_env.base_env.create_s3_client();
+    // Unversioned, and deliberately WITHOUT a bucket default-encryption rule, so the copy below
+    // resolves to "no destination encryption".
+    let bucket = "copy-object-self-copy-drop-sse-test";
+    let key = "secrets/report.txt";
+
+    client
+        .create_bucket()
+        .bucket(bucket)
+        .send()
+        .await
+        .expect("failed to create bucket");
+
+    let content = b"encrypted payload whose ciphertext must not survive as bogus plaintext -- 0123456789";
+    client
+        .put_object()
+        .bucket(bucket)
+        .key(key)
+        .metadata("stage", "before")
+        .server_side_encryption(ServerSideEncryption::Aes256)
+        .body(ByteStream::from_static(content))
+        .send()
+        .await
+        .expect("PUT failed");
+
+    // Self-copy with REPLACE and no SSE header. Per AWS semantics the destination ends up
+    // unencrypted. The dangerous outcome is the silent one: the handler strips the source key
+    // metadata while a metadata-only copy leaves the ciphertext in place, so a later GET would
+    // hand back raw ciphertext as if it were plaintext — corruption with no error anywhere.
+    client
+        .copy_object()
+        .bucket(bucket)
+        .key(key)
+        .copy_source(format!("{bucket}/{key}"))
+        .metadata_directive(MetadataDirective::Replace)
+        .metadata("stage", "after")
+        .send()
+        .await
+        .expect("same-key CopyObject dropping SSE must succeed");
+
+    let get = client
+        .get_object()
+        .bucket(bucket)
+        .key(key)
+        .send()
+        .await
+        .expect("GET after self-copy failed");
+    assert_eq!(
+        get.server_side_encryption(),
+        None,
+        "destination must be unencrypted once the copy drops SSE"
+    );
+    assert_eq!(
+        get.metadata().and_then(|m| m.get("stage")),
+        Some(&"after".to_string()),
+        "REPLACE metadata must take effect"
+    );
+    let body = get.body.collect().await.expect("collect body").into_bytes();
+    assert_eq!(
+        body.as_ref(),
+        content,
+        "object must read back as the original plaintext, not the orphaned ciphertext"
+    );
+
+    kms_env.base_env.stop_server();
+}
+
+#[tokio::test]
+#[serial]
+async fn test_metadata_replace_self_copy_under_bucket_default_sse_stays_decryptable() {
+    init_logging();
+    info!("bucket default encryption must also keep a same-key copy off the metadata-only path");
+
+    let mut kms_env = LocalKMSTestEnvironment::new().await.expect("failed to create local KMS env");
+    let default_key_id = "rustfs-e2e-test-default-key";
+    let keys_dir = kms_env.kms_keys_dir.clone();
+    create_key_with_specific_id(&keys_dir, default_key_id)
+        .await
+        .expect("failed to create local KMS key");
+    kms_env
+        .base_env
+        .start_rustfs_server_with_env(
+            vec![
+                "--kms-enable",
+                "--kms-backend",
+                "local",
+                "--kms-key-dir",
+                &keys_dir,
+                "--kms-default-key-id",
+                default_key_id,
+            ],
+            &[("RUSTFS_KMS_ALLOW_INSECURE_DEV_DEFAULTS", "true")],
+        )
+        .await
+        .expect("failed to start RustFS with local KMS");
+    tokio::time::sleep(tokio::time::Duration::from_secs(3)).await;
+
+    let client = kms_env.base_env.create_s3_client();
+    let bucket = "copy-object-self-copy-bucket-default-sse-test";
+    let key = "secrets/report.txt";
+
+    client
+        .create_bucket()
+        .bucket(bucket)
+        .send()
+        .await
+        .expect("failed to create bucket");
+
+    // Store the object as PLAINTEXT first: no SSE header and no bucket default rule yet. This is
+    // what makes the case sharp — at copy time the source metadata carries no encryption markers,
+    // so the source-side half of the guard cannot fire.
+    let content = b"plaintext payload that must not be orphaned under a new DEK -- 0123456789";
+    let put = client
+        .put_object()
+        .bucket(bucket)
+        .key(key)
+        .metadata("stage", "before")
+        .body(ByteStream::from_static(content))
+        .send()
+        .await
+        .expect("PUT failed");
+    assert_eq!(put.server_side_encryption(), None, "the object must start out unencrypted");
+
+    // Only NOW enable bucket default encryption. The destination's encryption therefore comes
+    // from the bucket rule and from nowhere else: the source is unencrypted and the copy request
+    // carries no SSE header. A guard that only inspects request headers (MinIO decides
+    // `isTargetEncrypted` from `crypto.S3.IsRequested(r.Header)`) would let this through, yet
+    // `sse_encryption` still mints a fresh DEK from the resolved bucket default — which is why
+    // the guard keys off the *effective* encryption rather than the requested one.
+    let encryption_config = ServerSideEncryptionConfiguration::builder()
+        .rules(
+            ServerSideEncryptionRule::builder()
+                .apply_server_side_encryption_by_default(
+                    ServerSideEncryptionByDefault::builder()
+                        .sse_algorithm(ServerSideEncryption::Aes256)
+                        .build()
+                        .unwrap(),
+                )
+                .build(),
+        )
+        .build()
+        .unwrap();
+    client
+        .put_bucket_encryption()
+        .bucket(bucket)
+        .server_side_encryption_configuration(encryption_config)
+        .send()
+        .await
+        .expect("failed to set bucket default encryption");
+
+    // No SSE header on the copy — the bucket default alone drives the destination encryption.
+    client
+        .copy_object()
+        .bucket(bucket)
+        .key(key)
+        .copy_source(format!("{bucket}/{key}"))
+        .metadata_directive(MetadataDirective::Replace)
+        .metadata("stage", "after")
+        .send()
+        .await
+        .expect("same-key CopyObject under bucket default encryption must succeed");
+
+    let get = client
+        .get_object()
+        .bucket(bucket)
+        .key(key)
+        .send()
+        .await
+        .expect("GET after self-copy failed: the object was re-keyed without rewriting the ciphertext");
+    assert_eq!(get.server_side_encryption(), Some(&ServerSideEncryption::Aes256));
+    assert_eq!(
+        get.metadata().and_then(|m| m.get("stage")),
+        Some(&"after".to_string()),
+        "REPLACE metadata must take effect"
+    );
+    let body = get.body.collect().await.expect("collect body").into_bytes();
+    assert_eq!(
+        body.as_ref(),
+        content,
+        "object must still decrypt to the original plaintext after a metadata-only self copy"
+    );
+
+    kms_env.base_env.stop_server();
+}

crates/e2e_test/src/kms/mod.rs

@@ -48,6 +48,9 @@ mod bucket_default_encryption_test;
 #[cfg(test)]
 mod encryption_metadata_test;
 
+#[cfg(test)]
+mod copy_object_self_copy_sse_test;
+
 #[cfg(test)]
 mod copy_object_version_restore_sse_test;
 

crates/e2e_test/src/lib.rs

@@ -290,6 +290,14 @@ mod overwrite_cleanup_regression_test;
 #[cfg(test)]
 mod list_buckets_double_slash_test;
 
+// Regression coverage for bucket-scoped ListBuckets authorization fallback.
+#[cfg(test)]
+mod list_buckets_auth_test;
+
+// ListBuckets visibility follows IAM authorization, not bucket policy.
+#[cfg(test)]
+mod list_buckets_iam_filter_test;
+
 // Regression test for backlog#629(b): region-aware CreateBucket SigV4.
 #[cfg(test)]
 mod create_bucket_region_test;
@@ -298,4 +306,32 @@ mod create_bucket_region_test;
 #[cfg(test)]
 mod copy_source_invalid_date_test;
 
+// P0 regression: event notification startup race (rustfs#5387, #5681, #5401, #5183, #5115, #4796)
+#[cfg(test)]
+mod notification_startup_regression_test;
+
+// P0 regression: lifecycle/ILM object expiration (rustfs#5407, #5167, #4963, #5615, #4879)
+#[cfg(test)]
+mod lifecycle_regression_test;
+
+// P0 regression: delete operations consistency (rustfs#5375, #5349, #5339, #5029, #4978, #760)
+#[cfg(test)]
+mod delete_regression_test;
+
+// P1 regression: listing/metacache completeness (rustfs#5166, #5156, #5051, #4810, #4648, #3191)
+#[cfg(test)]
+mod listing_regression_test;
+
+// P1 regression: bucket statistics accuracy (rustfs#5615, #5008, #5116, #5055, #3898, #1012)
+#[cfg(test)]
+mod bucket_stats_regression_test;
+
+// P1 regression: distributed startup/quorum (rustfs#5416, #2945, #2794, #2601, #4040, #5655)
+#[cfg(test)]
+mod distributed_startup_regression_test;
+
+// P1 regression: tier/ILM transition (rustfs#5218, #5130, #5011, #4826, #5024)
+#[cfg(test)]
+mod tier_transition_regression_test;
+
 pub mod tls_gen;

crates/e2e_test/src/lifecycle_regression_test.rs

@@ -0,0 +1,360 @@
+// 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.
+
+//! Regression tests for lifecycle/ILM object expiration and transition.
+//!
+//! Covers the recurring pattern where ILM expiration rules do not actually
+//! delete objects, or lifecycle rule parameters are silently corrupted.
+//! This has regressed 6+ times.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5407: lifecycle not delete any bucket object
+//! - rustfs#5167: lifecycle not delete object
+//! - rustfs#4963: lifecycle rule 3 days → effective value 0 days
+//! - rustfs#5615: bucket statistics remain unchanged after data expiration
+//! - rustfs#4879: ILM serial lane: restore transition never completes
+//! - rustfs#5442: Uncheck of Replicate Delete still deletes the file
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestEnvironment, init_logging};
+    use aws_sdk_s3::Client;
+    use aws_sdk_s3::primitives::ByteStream;
+    use aws_sdk_s3::types::{
+        BucketLifecycleConfiguration, BucketVersioningStatus, ExpirationStatus, LifecycleExpiration, LifecycleRule,
+        LifecycleRuleFilter, NoncurrentVersionExpiration, VersioningConfiguration,
+    };
+    use serial_test::serial;
+    use std::error::Error;
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    async fn setup_versioned_bucket(client: &Client, bucket: &str) -> TestResult {
+        client
+            .create_bucket()
+            .bucket(bucket)
+            .send()
+            .await
+            .map_err(|e| format!("create bucket: {e}"))?;
+
+        client
+            .put_bucket_versioning()
+            .bucket(bucket)
+            .versioning_configuration(
+                VersioningConfiguration::builder()
+                    .status(BucketVersioningStatus::Enabled)
+                    .build(),
+            )
+            .send()
+            .await
+            .map_err(|e| format!("enable versioning: {e}"))?;
+
+        Ok(())
+    }
+
+    /// RT-03: Verify that a lifecycle expiration rule actually deletes objects.
+    ///
+    /// Regression pattern: lifecycle rules are accepted but the scanner never
+    /// processes them, leaving expired objects in place.
+    ///
+    /// Steps:
+    /// 1. Create a versioned bucket
+    /// 2. Upload several objects
+    /// 3. Apply a lifecycle rule with 1-day expiration
+    /// 4. Wait for the scanner to process
+    /// 5. Verify objects are still present (they shouldn't expire yet — 1 day)
+    /// 6. Verify the lifecycle rule was persisted correctly (not corrupted to 0 days)
+    ///
+    /// This tests the rule persistence path (rustfs#4963: 3 days → 0 days).
+    #[tokio::test]
+    #[serial]
+    async fn test_lifecycle_expiration_rule_persists_correctly() -> TestResult {
+        init_logging();
+        info!("RT-03: lifecycle expiration rule persists correctly");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt03-lifecycle-persist";
+        setup_versioned_bucket(&client, bucket).await?;
+
+        // Apply a lifecycle rule with 1-day expiration on a prefix
+        let rule = LifecycleRule::builder()
+            .id("expire-after-1-day")
+            .status(ExpirationStatus::Enabled)
+            .filter(LifecycleRuleFilter::builder().prefix("logs/").build())
+            .expiration(LifecycleExpiration::builder().days(1).build())
+            .build()
+            .expect("build lifecycle rule");
+
+        client
+            .put_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .lifecycle_configuration(
+                BucketLifecycleConfiguration::builder()
+                    .rules(rule)
+                    .build()
+                    .expect("build lifecycle config"),
+            )
+            .send()
+            .await
+            .expect("put lifecycle configuration");
+
+        // Read back and verify the rule was not corrupted (rustfs#4963: days → 0)
+        let resp = client
+            .get_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("get lifecycle configuration");
+
+        let rules = resp.rules();
+        assert_eq!(rules.len(), 1, "RT-03 FAIL: expected exactly 1 lifecycle rule");
+
+        let retrieved = &rules[0];
+        assert_eq!(retrieved.id(), Some("expire-after-1-day"), "RT-03 FAIL: rule ID mismatch");
+        assert_eq!(retrieved.status(), &ExpirationStatus::Enabled, "RT-03 FAIL: rule should be Enabled");
+
+        let exp = retrieved.expiration().expect("expiration should be set");
+        assert_eq!(
+            exp.days(),
+            Some(1),
+            "RT-03 FAIL: expiration days corrupted (regression rustfs#4963: expected 1, got {:?})",
+            exp.days()
+        );
+
+        info!("RT-03 PASS: lifecycle expiration rule persists correctly");
+        Ok(())
+    }
+
+    /// RT-03b: Verify lifecycle rule with noncurrent version expiration.
+    ///
+    /// Covers the pattern where noncurrent version expiration rules are
+    /// accepted but old versions are never cleaned up.
+    #[tokio::test]
+    #[serial]
+    async fn test_lifecycle_noncurrent_version_expiration_rule_persists() -> TestResult {
+        init_logging();
+        info!("RT-03b: noncurrent version expiration rule persists");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt03b-noncurrent-expire";
+        setup_versioned_bucket(&client, bucket).await?;
+
+        // Create multiple versions of the same object
+        for i in 0..3 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key("versioned-obj.txt")
+                .body(ByteStream::from(format!("version-{i}").into_bytes()))
+                .send()
+                .await
+                .expect("put object version");
+        }
+
+        // Verify we have 3 versions
+        let versions = client
+            .list_object_versions()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list versions");
+
+        let count = versions.versions().len();
+        assert_eq!(count, 3, "RT-03b FAIL: expected 3 versions, found {count}");
+
+        // Apply noncurrent version expiration rule
+        let rule = LifecycleRule::builder()
+            .id("expire-noncurrent-after-1-day")
+            .status(ExpirationStatus::Enabled)
+            .filter(LifecycleRuleFilter::builder().prefix("").build())
+            .noncurrent_version_expiration(NoncurrentVersionExpiration::builder().noncurrent_days(1).build())
+            .build()
+            .expect("build lifecycle rule");
+
+        client
+            .put_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .lifecycle_configuration(
+                BucketLifecycleConfiguration::builder()
+                    .rules(rule)
+                    .build()
+                    .expect("build lifecycle config"),
+            )
+            .send()
+            .await
+            .expect("put lifecycle configuration");
+
+        // Read back and verify
+        let resp = client
+            .get_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("get lifecycle configuration");
+
+        let rules = resp.rules();
+        assert_eq!(rules.len(), 1, "RT-03b FAIL: expected 1 rule");
+
+        let nc_exp = rules[0]
+            .noncurrent_version_expiration()
+            .expect("noncurrent expiration should be set");
+        assert_eq!(nc_exp.noncurrent_days(), Some(1), "RT-03b FAIL: noncurrent days corrupted");
+
+        info!("RT-03b PASS: noncurrent version expiration rule persists correctly");
+        Ok(())
+    }
+
+    /// RT-04: Verify lifecycle rule with prefix filter persists after restart.
+    ///
+    /// Covers the pattern where lifecycle rules are accepted but silently lost
+    /// after restart. Transition rules require a configured remote tier
+    /// (tested in reliant/tiering.rs), so this test uses expiration only.
+    #[tokio::test]
+    #[serial]
+    async fn test_lifecycle_prefix_rule_persists() -> TestResult {
+        init_logging();
+        info!("RT-04: lifecycle prefix rule persists");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt04-lifecycle-prefix";
+        setup_versioned_bucket(&client, bucket).await?;
+
+        let rule = LifecycleRule::builder()
+            .id("expire-archive-after-7-days")
+            .status(ExpirationStatus::Enabled)
+            .filter(LifecycleRuleFilter::builder().prefix("archive/").build())
+            .expiration(LifecycleExpiration::builder().days(7).build())
+            .build()
+            .expect("build lifecycle rule");
+
+        client
+            .put_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .lifecycle_configuration(
+                BucketLifecycleConfiguration::builder()
+                    .rules(rule)
+                    .build()
+                    .expect("build lifecycle config"),
+            )
+            .send()
+            .await
+            .expect("put lifecycle configuration");
+
+        // Restart server
+        env.restart_server_preserving_data(vec![], &[]).await.expect("restart RustFS");
+
+        // Verify the rule survived restart
+        let resp = client
+            .get_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("get lifecycle after restart");
+
+        let rules = resp.rules();
+        assert_eq!(rules.len(), 1, "RT-04 FAIL: expected 1 rule after restart");
+
+        let exp = rules[0].expiration().expect("expiration should be set");
+        assert_eq!(exp.days(), Some(7), "RT-04 FAIL: expiration days corrupted after restart");
+
+        info!("RT-04 PASS: lifecycle prefix rule persists after restart");
+        Ok(())
+    }
+
+    /// RT-05b: Verify delete marker creation in versioned bucket.
+    ///
+    /// Regression pattern: DELETE on a versioned object fails or does not
+    /// create a delete marker, or the delete marker is not visible in LIST.
+    #[tokio::test]
+    #[serial]
+    async fn test_delete_marker_creation_and_visibility() -> TestResult {
+        init_logging();
+        info!("RT-05b: delete marker creation and visibility");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt05b-delete-marker";
+        setup_versioned_bucket(&client, bucket).await?;
+
+        // Put an object
+        client
+            .put_object()
+            .bucket(bucket)
+            .key("marker-test.txt")
+            .body(ByteStream::from_static(b"to-be-deleted"))
+            .send()
+            .await
+            .expect("put object");
+
+        // Delete without specifying versionId → should create a delete marker
+        let del_resp = client
+            .delete_object()
+            .bucket(bucket)
+            .key("marker-test.txt")
+            .send()
+            .await
+            .expect("delete object");
+
+        // The response should indicate a delete marker was created
+        assert!(
+            del_resp.delete_marker().unwrap_or(false),
+            "RT-05b FAIL: DELETE on versioned object did not create a delete marker"
+        );
+
+        // ListObjectVersions should show both the original version and the delete marker
+        let versions = client
+            .list_object_versions()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list versions");
+
+        let delete_markers: Vec<_> = versions
+            .delete_markers()
+            .iter()
+            .filter(|dm| dm.key() == Some("marker-test.txt"))
+            .collect();
+
+        assert_eq!(
+            delete_markers.len(),
+            1,
+            "RT-05b FAIL: expected 1 delete marker, found {}",
+            delete_markers.len()
+        );
+
+        info!("RT-05b PASS: delete marker created and visible");
+        Ok(())
+    }
+}

crates/e2e_test/src/list_buckets_auth_test.rs

@@ -0,0 +1,88 @@
+// 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.
+
+//! Regression coverage for the MinIO-compatible filtered ListBuckets fallback.
+
+use crate::common::{RustFSTestEnvironment, admin_ok, init_logging};
+use std::error::Error;
+
+type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+#[tokio::test]
+async fn bucket_scoped_policy_returns_only_authorized_bucket() -> TestResult {
+    init_logging();
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server(vec![]).await?;
+
+    let root_client = env.create_s3_client();
+    let allowed_bucket = "list-buckets-authorized";
+    let hidden_bucket = "list-buckets-hidden";
+    let user = "listbucketsuser";
+    let secret = "listbucketssecret";
+    let policy = "list-buckets-scoped";
+
+    root_client.create_bucket().bucket(allowed_bucket).send().await?;
+    root_client.create_bucket().bucket(hidden_bucket).send().await?;
+
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-canned-policy?name={policy}"),
+        Some(
+            serde_json::json!({
+                "Version": "2012-10-17",
+                "Statement": [{
+                    "Effect": "Allow",
+                    "Action": ["s3:*"],
+                    "Resource": [
+                        format!("arn:aws:s3:::{allowed_bucket}"),
+                        format!("arn:aws:s3:::{allowed_bucket}/*")
+                    ]
+                }]
+            })
+            .to_string(),
+        ),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-user?accessKey={user}"),
+        Some(serde_json::json!({ "secretKey": secret, "status": "enabled" }).to_string()),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::POST,
+        "/rustfs/admin/v3/idp/builtin/policy/attach",
+        Some(serde_json::json!({ "policies": [policy], "user": user }).to_string()),
+    )
+    .await?;
+
+    let client = env.create_s3_client_with_credentials(user, secret);
+    // Capture ListBuckets first so the direct-access control cannot warm bucket metadata and mask the regression.
+    let listed = client.list_buckets().send().await;
+    client.list_objects_v2().bucket(allowed_bucket).send().await?;
+
+    let listed = listed?;
+    let names = listed
+        .buckets()
+        .iter()
+        .filter_map(|bucket| bucket.name().map(ToOwned::to_owned))
+        .collect::<Vec<_>>();
+    assert_eq!(names, vec![allowed_bucket]);
+
+    Ok(())
+}

crates/e2e_test/src/list_buckets_iam_filter_test.rs

@@ -0,0 +1,459 @@
+// 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 crate::common::{RustFSTestEnvironment, admin_ok, build_test_s3_config, build_test_sts_client, init_logging};
+use aws_sdk_s3::Client;
+use aws_sdk_s3::error::ProvideErrorMetadata;
+use serial_test::serial;
+use tokio::time::{Duration, Instant};
+
+fn user_client(env: &RustFSTestEnvironment, access_key: &str, secret_key: &str, session_token: Option<&str>) -> Client {
+    Client::from_conf(build_test_s3_config(
+        &env.url,
+        access_key,
+        secret_key,
+        session_token,
+        "list-buckets-iam-filter",
+    ))
+}
+
+fn bucket_names(buckets: &[aws_sdk_s3::types::Bucket]) -> Vec<String> {
+    let mut names = buckets
+        .iter()
+        .filter_map(|bucket| bucket.name().map(str::to_owned))
+        .collect::<Vec<_>>();
+    names.sort();
+    names
+}
+
+async fn create_user(
+    env: &RustFSTestEnvironment,
+    access_key: &str,
+    secret_key: &str,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    let body = serde_json::json!({ "secretKey": secret_key, "status": "enabled" }).to_string();
+    admin_ok(
+        env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-user?accessKey={access_key}"),
+        Some(body),
+    )
+    .await?;
+    Ok(())
+}
+
+async fn create_service_account(
+    env: &RustFSTestEnvironment,
+    target_user: &str,
+    policy: Option<&serde_json::Value>,
+) -> Result<(String, String), Box<dyn std::error::Error + Send + Sync>> {
+    let request = match policy {
+        Some(policy) => serde_json::json!({ "targetUser": target_user, "policy": policy }),
+        None => serde_json::json!({ "targetUser": target_user }),
+    };
+    let response = admin_ok(env, http::Method::PUT, "/rustfs/admin/v3/add-service-accounts", Some(request.to_string())).await?;
+    let response: serde_json::Value = serde_json::from_str(&response)?;
+    let access_key = response["credentials"]["accessKey"]
+        .as_str()
+        .ok_or("service account response should contain credentials.accessKey")?
+        .to_owned();
+    let secret_key = response["credentials"]["secretKey"]
+        .as_str()
+        .ok_or("service account response should contain credentials.secretKey")?
+        .to_owned();
+    Ok((access_key, secret_key))
+}
+
+#[tokio::test]
+#[serial]
+async fn list_buckets_filters_with_iam_bucket_resources() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.capture_log_path = Some(format!("{}/server.log", env.temp_dir));
+    env.start_rustfs_server_with_env(vec![], &[("RUST_LOG", "rustfs=debug,rustfs_notify=debug")])
+        .await?;
+
+    let admin_client = env.create_s3_client();
+    for bucket in [
+        "benchmark-artifacts",
+        "benchmark-denied",
+        "benchmark-location-only",
+        "benchmark-test1",
+        "testuser1-artifacts",
+    ] {
+        admin_client.create_bucket().bucket(bucket).send().await?;
+    }
+    assert_eq!(
+        bucket_names(admin_client.list_buckets().send().await?.buckets()),
+        vec![
+            "benchmark-artifacts",
+            "benchmark-denied",
+            "benchmark-location-only",
+            "benchmark-test1",
+            "testuser1-artifacts"
+        ]
+    );
+
+    let access_key = "benchmark";
+    let secret_key = "benchmark-secret-1234567890";
+    create_user(&env, access_key, secret_key).await?;
+
+    let policy_name = "benchmark-bucket-prefix";
+    let policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [
+            {
+                "Effect": "Allow",
+                "Action": ["s3:*"],
+                "Resource": ["arn:aws:s3:::benchmark-*", "arn:aws:s3:::benchmark-*/*"],
+                "Condition": {
+                    "StringEquals": {
+                        "s3:prefix": [""],
+                        "s3:delimiter": ["/"]
+                    }
+                }
+            },
+            {
+                "Effect": "Deny",
+                "Action": ["s3:ListBucket", "s3:GetBucketLocation"],
+                "Resource": ["arn:aws:s3:::benchmark-denied"]
+            },
+            {
+                "Effect": "Deny",
+                "Action": ["s3:ListBucket"],
+                "Resource": ["arn:aws:s3:::benchmark-location-only"]
+            },
+            {
+                "Effect": "Allow",
+                "Action": ["sts:AssumeRole"],
+                "Resource": ["arn:aws:s3:::*"]
+            }
+        ]
+    })
+    .to_string();
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-canned-policy?name={policy_name}"),
+        Some(policy),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/set-user-or-group-policy?policyName={policy_name}&userOrGroup={access_key}&isGroup=false"),
+        Some(String::new()),
+    )
+    .await?;
+
+    let bucket_policy_allow = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Principal": { "AWS": [access_key] },
+            "Action": ["s3:ListBucket"],
+            "Resource": ["arn:aws:s3:::testuser1-artifacts"]
+        }]
+    })
+    .to_string();
+    admin_client
+        .put_bucket_policy()
+        .bucket("testuser1-artifacts")
+        .policy(bucket_policy_allow)
+        .send()
+        .await?;
+
+    let bucket_policy_deny = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Deny",
+            "Principal": { "AWS": [access_key] },
+            "Action": ["s3:ListBucket", "s3:GetBucketLocation"],
+            "Resource": ["arn:aws:s3:::benchmark-artifacts"]
+        }]
+    })
+    .to_string();
+    admin_client
+        .put_bucket_policy()
+        .bucket("benchmark-artifacts")
+        .policy(bucket_policy_deny)
+        .send()
+        .await?;
+
+    let benchmark_client = user_client(&env, access_key, secret_key, None);
+    benchmark_client
+        .list_objects_v2()
+        .bucket("testuser1-artifacts")
+        .send()
+        .await?;
+
+    assert_eq!(
+        bucket_names(benchmark_client.list_buckets().send().await?.buckets()),
+        vec!["benchmark-artifacts", "benchmark-location-only", "benchmark-test1"]
+    );
+    let log_path = env.capture_log_path.as_deref().expect("server log path should be configured");
+    let deadline = Instant::now() + Duration::from_secs(5);
+    let audit_log = loop {
+        let audit_log = tokio::fs::read_to_string(log_path).await?;
+        if [
+            "iam_implicit_deny",
+            "s3_authorization_denied",
+            "ListAllMyBucketsAction",
+            "benchmark",
+            "DEBUG",
+        ]
+        .iter()
+        .all(|field| audit_log.contains(field))
+            || Instant::now() >= deadline
+        {
+            break audit_log;
+        }
+        tokio::time::sleep(Duration::from_millis(50)).await;
+    };
+    assert_eq!(audit_log.matches("iam_implicit_deny").count(), 1, "{audit_log}");
+    for field in ["s3_authorization_denied", "ListAllMyBucketsAction", "benchmark", "DEBUG"] {
+        assert!(audit_log.contains(field), "missing {field} in {audit_log}");
+    }
+
+    let denied_access_key = "no-bucket-access";
+    let denied_secret_key = "no-bucket-access-secret-1234567890";
+    create_user(&env, denied_access_key, denied_secret_key).await?;
+    let denied = user_client(&env, denied_access_key, denied_secret_key, None)
+        .list_buckets()
+        .send()
+        .await
+        .expect_err("a user without IAM bucket permissions must be denied");
+    assert_eq!(denied.as_service_error().and_then(ProvideErrorMetadata::code), Some("AccessDenied"));
+
+    let put_only_policy_name = "put-only-no-bucket-discovery";
+    let put_only_policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Action": ["s3:PutObject"],
+            "Resource": ["arn:aws:s3:::benchmark-*/*"]
+        }]
+    })
+    .to_string();
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-canned-policy?name={put_only_policy_name}"),
+        Some(put_only_policy),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!(
+            "/rustfs/admin/v3/set-user-or-group-policy?policyName={put_only_policy_name}&userOrGroup={denied_access_key}&isGroup=false"
+        ),
+        Some(String::new()),
+    )
+    .await?;
+    let denied = user_client(&env, denied_access_key, denied_secret_key, None)
+        .list_buckets()
+        .send()
+        .await
+        .expect_err("an unrelated IAM action must not reveal bucket names");
+    assert_eq!(denied.as_service_error().and_then(ProvideErrorMetadata::code), Some("AccessDenied"));
+
+    let list_all_policy_name = "list-all-buckets";
+    let list_all_policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Action": ["s3:ListAllMyBuckets"],
+            "Resource": ["arn:aws:s3:::*"]
+        }]
+    })
+    .to_string();
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/add-canned-policy?name={list_all_policy_name}"),
+        Some(list_all_policy),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!(
+            "/rustfs/admin/v3/set-user-or-group-policy?policyName={list_all_policy_name}&userOrGroup={denied_access_key}&isGroup=false"
+        ),
+        Some(String::new()),
+    )
+    .await?;
+    assert_eq!(
+        bucket_names(
+            user_client(&env, denied_access_key, denied_secret_key, None)
+                .list_buckets()
+                .send()
+                .await?
+                .buckets()
+        ),
+        vec![
+            "benchmark-artifacts",
+            "benchmark-denied",
+            "benchmark-location-only",
+            "benchmark-test1",
+            "testuser1-artifacts"
+        ]
+    );
+
+    let group_user = "benchmark-group-user";
+    let group_secret = "benchmark-group-secret-1234567890";
+    let group_name = "benchmark-group";
+    create_user(&env, group_user, group_secret).await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        "/rustfs/admin/v3/update-group-members",
+        Some(
+            serde_json::json!({
+                "group": group_name,
+                "members": [group_user],
+                "isRemove": false,
+                "groupStatus": "enabled"
+            })
+            .to_string(),
+        ),
+    )
+    .await?;
+    admin_ok(
+        &env,
+        http::Method::PUT,
+        &format!("/rustfs/admin/v3/set-user-or-group-policy?policyName={policy_name}&userOrGroup={group_name}&isGroup=true"),
+        Some(String::new()),
+    )
+    .await?;
+
+    assert_eq!(
+        bucket_names(
+            user_client(&env, group_user, group_secret, None)
+                .list_buckets()
+                .send()
+                .await?
+                .buckets()
+        ),
+        vec!["benchmark-artifacts", "benchmark-location-only", "benchmark-test1"]
+    );
+
+    let (service_access_key, service_secret_key) = create_service_account(&env, group_user, None).await?;
+    assert_eq!(
+        bucket_names(
+            user_client(&env, &service_access_key, &service_secret_key, None)
+                .list_buckets()
+                .send()
+                .await?
+                .buckets()
+        ),
+        vec!["benchmark-artifacts", "benchmark-location-only", "benchmark-test1"]
+    );
+
+    let service_account_policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Action": ["s3:ListBucket", "s3:GetBucketLocation"],
+            "Resource": ["arn:aws:s3:::benchmark-test1"],
+            "Condition": {
+                "StringEquals": {
+                    "s3:prefix": [""],
+                    "s3:delimiter": ["/"]
+                }
+            }
+        }]
+    });
+    let (restricted_service_access_key, restricted_service_secret_key) =
+        create_service_account(&env, group_user, Some(&service_account_policy)).await?;
+    assert_eq!(
+        bucket_names(
+            user_client(&env, &restricted_service_access_key, &restricted_service_secret_key, None,)
+                .list_buckets()
+                .send()
+                .await?
+                .buckets()
+        ),
+        vec!["benchmark-test1"]
+    );
+
+    let sts_client = build_test_sts_client(&env.url, group_user, group_secret, None, "list-buckets-iam-filter-sts");
+    let inherited = sts_client
+        .assume_role()
+        .role_arn("arn:aws:iam::123456789012:role/list-buckets")
+        .role_session_name("list-buckets-iam-filter-inherited")
+        .send()
+        .await?;
+    let inherited = inherited
+        .credentials()
+        .ok_or("AssumeRole response should contain inherited temporary credentials")?;
+    assert_eq!(
+        bucket_names(
+            user_client(
+                &env,
+                inherited.access_key_id(),
+                inherited.secret_access_key(),
+                Some(inherited.session_token()),
+            )
+            .list_buckets()
+            .send()
+            .await?
+            .buckets()
+        ),
+        vec!["benchmark-artifacts", "benchmark-location-only", "benchmark-test1"]
+    );
+
+    let session_policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [{
+            "Effect": "Allow",
+            "Action": ["s3:ListBucket", "s3:GetBucketLocation"],
+            "Resource": ["arn:aws:s3:::benchmark-test1"],
+            "Condition": {
+                "StringEquals": {
+                    "s3:prefix": [""],
+                    "s3:delimiter": ["/"]
+                }
+            }
+        }]
+    })
+    .to_string();
+    let assumed = sts_client
+        .assume_role()
+        .role_arn("arn:aws:iam::123456789012:role/list-buckets")
+        .role_session_name("list-buckets-iam-filter")
+        .policy(session_policy)
+        .send()
+        .await?;
+    let temporary = assumed
+        .credentials()
+        .ok_or("AssumeRole response should contain temporary credentials")?;
+    assert_eq!(
+        bucket_names(
+            user_client(
+                &env,
+                temporary.access_key_id(),
+                temporary.secret_access_key(),
+                Some(temporary.session_token()),
+            )
+            .list_buckets()
+            .send()
+            .await?
+            .buckets()
+        ),
+        vec!["benchmark-test1"]
+    );
+    Ok(())
+}

crates/e2e_test/src/listing_regression_test.rs

@@ -0,0 +1,357 @@
+// 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.
+
+//! Regression tests for object listing and metacache consistency.
+//!
+//! Covers the recurring pattern where ListObjectsV2 returns incomplete results,
+//! silently truncates with IsTruncated=false, or corrupts the metadata cache.
+//! This has regressed 8+ times.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5166: Metacache listing quorum failed timeout after cluster startup
+//! - rustfs#5156: Metacache producer failed
+//! - rustfs#5051: ListObjectsV2 returns empty results for shallow prefixes
+//! - rustfs#4810: walk_dir timeout silently truncates listings (200, IsTruncated=false)
+//! - rustfs#4648: Object listing oscillates between complete, partial, and zero
+//! - rustfs#3191: ListObjectsV2 timeout corrupts metadata cache → NoSuchBucket
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestEnvironment, init_logging};
+    use aws_sdk_s3::primitives::ByteStream;
+    use serial_test::serial;
+    use std::collections::HashSet;
+    use std::error::Error;
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    /// RT-06: Verify ListObjectsV2 pagination completeness for medium-sized bucket.
+    ///
+    /// Regression pattern: listing returns 200 with IsTruncated=false but
+    /// misses objects (rustfs#4810: walk_dir timeout truncation).
+    ///
+    /// Steps:
+    /// 1. Upload 100 objects with known keys
+    /// 2. List all objects via pagination (max_keys=10)
+    /// 3. Verify all 100 keys are returned exactly once
+    /// 4. Verify no duplicates or skipped keys
+    #[tokio::test]
+    #[serial]
+    async fn test_list_objects_v2_completeness_100_objects() -> TestResult {
+        init_logging();
+        info!("RT-06: listing completeness with 100 objects");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt06-list-completeness";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload 100 objects
+        let expected_keys: Vec<String> = (0..100).map(|i| format!("obj-{i:04}.txt")).collect();
+        for key in &expected_keys {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(key)
+                .body(ByteStream::from_static(b"data"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        // Paginate through all objects (small page size to force multiple pages)
+        let mut all_keys: Vec<String> = Vec::new();
+        let mut continuation_token: Option<String> = None;
+
+        loop {
+            let mut req = client.list_objects_v2().bucket(bucket).max_keys(10);
+
+            if let Some(ref token) = continuation_token {
+                req = req.continuation_token(token);
+            }
+
+            let resp = req.send().await.expect("list objects page");
+
+            for obj in resp.contents() {
+                all_keys.push(obj.key().unwrap_or("").to_string());
+            }
+
+            if !resp.is_truncated().unwrap_or(false) {
+                break;
+            }
+            continuation_token = resp.next_continuation_token().map(|s| s.to_string());
+        }
+
+        // Verify completeness and uniqueness
+        let unique_keys: HashSet<&str> = all_keys.iter().map(|s| s.as_str()).collect();
+
+        assert_eq!(
+            all_keys.len(),
+            100,
+            "RT-06 FAIL: expected 100 objects, listed {} (regression: walk_dir truncation)",
+            all_keys.len()
+        );
+        assert_eq!(
+            unique_keys.len(),
+            100,
+            "RT-06 FAIL: found {} unique keys but listed {} total (duplicates!)",
+            unique_keys.len(),
+            all_keys.len()
+        );
+
+        for key in &expected_keys {
+            assert!(
+                unique_keys.contains(key.as_str()),
+                "RT-06 FAIL: key '{key}' missing from listing (regression rustfs#4810)"
+            );
+        }
+
+        info!("RT-06 PASS: all 100 objects listed completely and uniquely");
+        Ok(())
+    }
+
+    /// RT-06b: Verify listing with prefix filter returns correct subset.
+    ///
+    /// Regression pattern: prefix filter returns empty or includes wrong keys
+    /// (rustfs#5051: empty results for shallow prefixes).
+    #[tokio::test]
+    #[serial]
+    async fn test_list_objects_v2_prefix_filter_correctness() -> TestResult {
+        init_logging();
+        info!("RT-06b: prefix filter correctness");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt06b-prefix-filter";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload objects with different prefixes
+        for i in 0..5 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(format!("logs/app-{i:04}.log"))
+                .body(ByteStream::from_static(b"log data"))
+                .send()
+                .await
+                .expect("put log object");
+
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(format!("data/file-{i:04}.csv"))
+                .body(ByteStream::from_static(b"csv data"))
+                .send()
+                .await
+                .expect("put data object");
+        }
+
+        // List with prefix "logs/" — should return exactly 5
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .prefix("logs/")
+            .send()
+            .await
+            .expect("list with prefix");
+
+        assert_eq!(
+            resp.contents().len(),
+            5,
+            "RT-06b FAIL: expected 5 objects with prefix 'logs/', found {} (regression rustfs#5051)",
+            resp.contents().len()
+        );
+
+        for obj in resp.contents() {
+            assert!(
+                obj.key().unwrap_or("").starts_with("logs/"),
+                "RT-06b FAIL: object '{}' does not match prefix 'logs/'",
+                obj.key().unwrap_or("?")
+            );
+        }
+
+        // List with prefix "data/" — should return exactly 5
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .prefix("data/")
+            .send()
+            .await
+            .expect("list with data/ prefix");
+
+        assert_eq!(
+            resp.contents().len(),
+            5,
+            "RT-06b FAIL: expected 5 objects with prefix 'data/', found {}",
+            resp.contents().len()
+        );
+
+        // List with prefix "nonexistent/" — should return 0
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .prefix("nonexistent/")
+            .send()
+            .await
+            .expect("list with nonexistent prefix");
+
+        assert!(
+            resp.contents().is_empty(),
+            "RT-06b FAIL: expected 0 objects with prefix 'nonexistent/', found {}",
+            resp.contents().len()
+        );
+
+        info!("RT-06b PASS: prefix filter returns correct subset");
+        Ok(())
+    }
+
+    /// RT-06c: Verify listing with delimiter and CommonPrefixes.
+    ///
+    /// Regression pattern: delimiter handling produces incorrect CommonPrefixes
+    /// or misses objects at the delimiter boundary.
+    #[tokio::test]
+    #[serial]
+    async fn test_list_objects_v2_delimiter_common_prefixes() -> TestResult {
+        init_logging();
+        info!("RT-06c: delimiter and CommonPrefixes");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt06c-delimiter";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Create a hierarchical structure
+        let keys = vec!["a.txt", "dir1/b.txt", "dir1/sub1/c.txt", "dir1/sub2/d.txt", "dir2/e.txt"];
+
+        for key in &keys {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(*key)
+                .body(ByteStream::from_static(b"content"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        // List with delimiter "/" at root level
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .delimiter("/")
+            .send()
+            .await
+            .expect("list with delimiter");
+
+        // Should have 1 object (a.txt) and 2 common prefixes (dir1/, dir2/)
+        let contents: Vec<_> = resp.contents().iter().map(|o| o.key().unwrap_or("")).collect();
+        let prefixes: Vec<_> = resp.common_prefixes().iter().map(|p| p.prefix().unwrap_or("")).collect();
+
+        assert!(contents.contains(&"a.txt"), "RT-06c FAIL: root object 'a.txt' missing from listing");
+        assert_eq!(contents.len(), 1, "RT-06c FAIL: expected 1 root-level object, found {}", contents.len());
+        assert_eq!(prefixes.len(), 2, "RT-06c FAIL: expected 2 common prefixes, found {:?}", prefixes);
+        assert!(prefixes.contains(&"dir1/"), "RT-06c FAIL: 'dir1/' missing from CommonPrefixes");
+        assert!(prefixes.contains(&"dir2/"), "RT-06c FAIL: 'dir2/' missing from CommonPrefixes");
+
+        info!("RT-06c PASS: delimiter and CommonPrefixes correct");
+        Ok(())
+    }
+
+    /// RT-06d: Verify listing returns correct IsTruncated flag.
+    ///
+    /// Regression pattern: IsTruncated=false when there are more objects
+    /// (rustfs#4810: walk_dir timeout truncation with false IsTruncated).
+    #[tokio::test]
+    #[serial]
+    async fn test_list_objects_v2_is_truncated_correctness() -> TestResult {
+        init_logging();
+        info!("RT-06d: IsTruncated correctness");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt06d-truncated";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Upload 15 objects
+        for i in 0..15 {
+            client
+                .put_object()
+                .bucket(bucket)
+                .key(format!("item-{i:04}.txt"))
+                .body(ByteStream::from_static(b"data"))
+                .send()
+                .await
+                .expect("put object");
+        }
+
+        // List with max_keys=5 — should be truncated
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .max_keys(5)
+            .send()
+            .await
+            .expect("list with max_keys=5");
+
+        assert!(
+            resp.is_truncated().unwrap_or(false),
+            "RT-06d FAIL: IsTruncated should be true with 15 objects and max_keys=5"
+        );
+        assert_eq!(resp.contents().len(), 5, "RT-06d FAIL: expected 5 objects in first page");
+        assert!(
+            resp.next_continuation_token().is_some(),
+            "RT-06d FAIL: NextContinuationToken should be present when truncated"
+        );
+
+        // List with max_keys=100 — should NOT be truncated
+        let resp = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .max_keys(100)
+            .send()
+            .await
+            .expect("list with max_keys=100");
+
+        assert!(
+            !resp.is_truncated().unwrap_or(false),
+            "RT-06d FAIL: IsTruncated should be false with 15 objects and max_keys=100"
+        );
+        assert_eq!(resp.contents().len(), 15, "RT-06d FAIL: expected 15 objects with max_keys=100");
+
+        info!("RT-06d PASS: IsTruncated flag is correct");
+        Ok(())
+    }
+}

crates/e2e_test/src/multipart_auth_test.rs

@@ -62,6 +62,33 @@ fn md5_hex(input: impl AsRef<[u8]>) -> String {
     hex::encode(hasher.finalize())
 }
 
+async fn create_restricted_user(
+    env: &RustFSTestEnvironment,
+    username: &str,
+    secret_key: &str,
+) -> Result<(), Box<dyn Error + Send + Sync>> {
+    let url = format!("{}/rustfs/admin/v3/add-user?accessKey={username}", env.url);
+    let body = serde_json::json!({
+        "secretKey": secret_key,
+        "status": "enabled"
+    })
+    .to_string();
+    crate::common::awscurl_put(&url, &body, &env.access_key, &env.secret_key).await?;
+    Ok(())
+}
+
+fn restricted_user_client(env: &RustFSTestEnvironment, username: &str, secret_key: &str) -> aws_sdk_s3::Client {
+    let credentials = aws_sdk_s3::config::Credentials::new(username, secret_key, None, None, "snowball-pax-auth-test");
+    let config = aws_sdk_s3::Config::builder()
+        .credentials_provider(credentials)
+        .region(aws_sdk_s3::config::Region::new("us-east-1"))
+        .endpoint_url(&env.url)
+        .force_path_style(true)
+        .behavior_version_latest()
+        .build();
+    aws_sdk_s3::Client::from_conf(config)
+}
+
 /// Env var consumed by the local SSE-S3 DEK provider when KMS is not configured.
 ///
 /// Since rustfs#3564 the server fails closed on managed SSE (SSE-S3 or
@@ -3557,8 +3584,8 @@ async fn test_anonymous_post_object_rejects_expires_field_missing_from_policy_co
 
 #[tokio::test]
 #[serial]
-async fn test_anonymous_post_object_accepts_object_lock_retention_fields() -> Result<(), Box<dyn std::error::Error + Send + Sync>>
-{
+async fn test_anonymous_post_object_rejects_object_lock_retention_without_permission()
+-> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     init_logging();
 
     let mut env = RustFSTestEnvironment::new().await?;
@@ -3567,8 +3594,6 @@ async fn test_anonymous_post_object_accepts_object_lock_retention_fields() -> Re
     let bucket = "anon-post-policy-object-lock-retention";
     let object_key = "uploads/object-lock-retention.txt";
     let retain_until = "2037-10-21T07:28:00Z";
-    let expected_body = b"post-policy-object-lock-retention-body".to_vec();
-
     let admin_client = env.create_s3_client();
     admin_client
         .create_bucket()
@@ -3593,7 +3618,7 @@ async fn test_anonymous_post_object_accepts_object_lock_retention_fields() -> Re
         .text("x-amz-object-lock-retain-until-date", retain_until)
         .part(
             "file",
-            reqwest::multipart::Part::bytes(expected_body.clone())
+            reqwest::multipart::Part::bytes(b"post-policy-object-lock-retention-body".to_vec())
                 .file_name("upload.txt")
                 .mime_str("text/plain")?,
         );
@@ -3607,26 +3632,8 @@ async fn test_anonymous_post_object_accepts_object_lock_retention_fields() -> Re
     let status = post_resp.status();
     let response_body = post_resp.text().await?;
 
-    assert_eq!(status, reqwest::StatusCode::NO_CONTENT);
-    assert!(response_body.is_empty(), "204 response should not contain a body, got: {response_body}");
-
-    let retention = admin_client
-        .get_object_retention()
-        .bucket(bucket)
-        .key(object_key)
-        .send()
-        .await?;
-    let retention = retention.retention().expect("retention should be present");
-    assert_eq!(retention.mode().map(|value| value.as_str()), Some("GOVERNANCE"));
-    let retain_until_out = retention
-        .retain_until_date()
-        .expect("retain_until_date should be present")
-        .fmt(aws_sdk_s3::primitives::DateTimeFormat::DateTime)?;
-    assert_eq!(retain_until_out, retain_until);
-
-    let get_out = admin_client.get_object().bucket(bucket).key(object_key).send().await?;
-    let uploaded = get_out.body.collect().await?.into_bytes();
-    assert_eq!(uploaded.as_ref(), expected_body.as_slice());
+    assert_eq!(status, reqwest::StatusCode::FORBIDDEN);
+    assert!(response_body.contains("AccessDenied"));
 
     Ok(())
 }
@@ -3815,8 +3822,8 @@ async fn test_anonymous_post_object_rejects_object_lock_retention_missing_from_p
 
 #[tokio::test]
 #[serial]
-async fn test_anonymous_post_object_accepts_object_lock_legal_hold_field() -> Result<(), Box<dyn std::error::Error + Send + Sync>>
-{
+async fn test_anonymous_post_object_rejects_object_lock_legal_hold_without_permission()
+-> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     init_logging();
 
     let mut env = RustFSTestEnvironment::new().await?;
@@ -3824,8 +3831,6 @@ async fn test_anonymous_post_object_accepts_object_lock_legal_hold_field() -> Re
 
     let bucket = "anon-post-policy-object-lock-legal-hold";
     let object_key = "uploads/object-lock-legal-hold.txt";
-    let expected_body = b"post-policy-object-lock-legal-hold-body".to_vec();
-
     let admin_client = env.create_s3_client();
     admin_client
         .create_bucket()
@@ -3848,7 +3853,7 @@ async fn test_anonymous_post_object_accepts_object_lock_legal_hold_field() -> Re
         .text("x-amz-object-lock-legal-hold", "ON")
         .part(
             "file",
-            reqwest::multipart::Part::bytes(expected_body.clone())
+            reqwest::multipart::Part::bytes(b"post-policy-object-lock-legal-hold-body".to_vec())
                 .file_name("upload.txt")
                 .mime_str("text/plain")?,
         );
@@ -3862,26 +3867,8 @@ async fn test_anonymous_post_object_accepts_object_lock_legal_hold_field() -> Re
     let status = post_resp.status();
     let response_body = post_resp.text().await?;
 
-    assert_eq!(status, reqwest::StatusCode::NO_CONTENT);
-    assert!(response_body.is_empty(), "204 response should not contain a body, got: {response_body}");
-
-    let legal_hold = admin_client
-        .get_object_legal_hold()
-        .bucket(bucket)
-        .key(object_key)
-        .send()
-        .await?;
-    assert_eq!(
-        legal_hold
-            .legal_hold()
-            .and_then(|value| value.status())
-            .map(|value| value.as_str()),
-        Some("ON")
-    );
-
-    let get_out = admin_client.get_object().bucket(bucket).key(object_key).send().await?;
-    let uploaded = get_out.body.collect().await?.into_bytes();
-    assert_eq!(uploaded.as_ref(), expected_body.as_slice());
+    assert_eq!(status, reqwest::StatusCode::FORBIDDEN);
+    assert!(response_body.contains("AccessDenied"));
 
     Ok(())
 }
@@ -5658,6 +5645,70 @@ async fn test_signed_put_object_extract_preserves_object_lock_retention() -> Res
     Ok(())
 }
 
+#[tokio::test]
+#[serial]
+async fn test_signed_put_object_extract_pax_retention_overrides_request_retention()
+-> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server(vec![]).await?;
+
+    let bucket = "signed-extract-pax-retention-precedence";
+    let archive_key = "retention.tar";
+    let extracted_key = "alpha.txt";
+    let request_retain_until = aws_sdk_s3::primitives::DateTime::from_secs(2_114_380_800);
+    let pax_retain_until = "2040-01-01T00:00:00Z";
+
+    let client = env.create_s3_client();
+    client
+        .create_bucket()
+        .bucket(bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+
+    let pax = HashMap::from([
+        ("minio.metadata.x-amz-object-lock-mode", "COMPLIANCE".to_string()),
+        ("minio.metadata.x-amz-object-lock-retain-until-date", pax_retain_until.to_string()),
+    ]);
+    let archive = make_tar_with_pax_entry(extracted_key, b"alpha-body", None, &pax).await;
+
+    client
+        .put_object()
+        .bucket(bucket)
+        .key(archive_key)
+        .object_lock_mode(aws_sdk_s3::types::ObjectLockMode::Governance)
+        .object_lock_retain_until_date(request_retain_until)
+        .body(ByteStream::from(archive))
+        .customize()
+        .mutate_request(|req| {
+            req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+        })
+        .send()
+        .await?;
+
+    let retention = client
+        .get_object_retention()
+        .bucket(bucket)
+        .key(extracted_key)
+        .send()
+        .await?
+        .retention()
+        .expect("retention should be present")
+        .clone();
+    assert_eq!(retention.mode().map(|value| value.as_str()), Some("COMPLIANCE"));
+    assert_eq!(
+        retention
+            .retain_until_date()
+            .expect("retain_until_date should be present")
+            .fmt(aws_sdk_s3::primitives::DateTimeFormat::DateTime)?,
+        pax_retain_until
+    );
+
+    Ok(())
+}
+
 #[tokio::test]
 #[serial]
 async fn test_signed_put_object_extract_returns_archive_etag() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
@@ -5782,6 +5833,316 @@ async fn test_signed_put_object_extract_preserves_pax_metadata_and_version_id()
     Ok(())
 }
 
+#[tokio::test]
+#[serial]
+async fn test_signed_put_object_extract_authorizes_each_pax_privilege_and_retention_conditions()
+-> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    if !crate::common::awscurl_available() {
+        return Ok(());
+    }
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server(vec![]).await?;
+
+    let bucket = "signed-extract-pax-auth";
+    let put_only_user = "snowball-put-only";
+    let put_only_secret = "snowball-put-only-secret";
+    let conditional_user = "snowball-retention-condition";
+    let conditional_secret = "snowball-retention-condition-secret";
+    let wrong_action_user = "snowball-wrong-action";
+    let wrong_action_secret = "snowball-wrong-action-secret";
+    let version_condition_user = "snowball-version-condition";
+    let version_condition_secret = "snowball-version-condition-secret";
+    let pax_context_user = "snowball-pax-context";
+    let pax_context_secret = "snowball-pax-context-secret";
+    let conditional_version_id = Uuid::new_v4().to_string();
+    let admin_client = env.create_s3_client();
+    admin_client
+        .create_bucket()
+        .bucket(bucket)
+        .object_lock_enabled_for_bucket(true)
+        .send()
+        .await?;
+    create_restricted_user(&env, put_only_user, put_only_secret).await?;
+    create_restricted_user(&env, conditional_user, conditional_secret).await?;
+    create_restricted_user(&env, wrong_action_user, wrong_action_secret).await?;
+    create_restricted_user(&env, version_condition_user, version_condition_secret).await?;
+    create_restricted_user(&env, pax_context_user, pax_context_secret).await?;
+
+    let object_resource = format!("arn:aws:s3:::{bucket}/*");
+    let context_archive_resources = [
+        format!("arn:aws:s3:::{bucket}/tag-context.tar"),
+        format!("arn:aws:s3:::{bucket}/lock-context.tar"),
+    ];
+    let tag_entry_resource = format!("arn:aws:s3:::{bucket}/tag-context-entry.txt");
+    let lock_entry_resource = format!("arn:aws:s3:::{bucket}/lock-context-entry.txt");
+    let policy = serde_json::json!({
+        "Version": "2012-10-17",
+        "Statement": [
+            {
+                "Sid": "PutOnly",
+                "Effect": "Allow",
+                "Principal": { "AWS": [put_only_user] },
+                "Action": ["s3:PutObject"],
+                "Resource": [object_resource.clone()]
+            },
+            {
+                "Sid": "RetentionWithLimit",
+                "Effect": "Allow",
+                "Principal": { "AWS": [conditional_user] },
+                "Action": ["s3:PutObject", "s3:PutObjectRetention"],
+                "Resource": [object_resource.clone()]
+            },
+            {
+                "Sid": "DenyRetentionBeyondCutoff",
+                "Effect": "Deny",
+                "Principal": { "AWS": [conditional_user] },
+                "Action": ["s3:PutObject"],
+                "Resource": [object_resource.clone()],
+                "Condition": {
+                    "DateGreaterThan": {
+                        "s3:object-lock-retain-until-date": "2030-01-01T00:00:00Z"
+                    }
+                }
+            },
+            {
+                "Sid": "WrongAdditionalAction",
+                "Effect": "Allow",
+                "Principal": { "AWS": [wrong_action_user] },
+                "Action": ["s3:PutObject", "s3:PutObjectLegalHold"],
+                "Resource": [object_resource.clone()]
+            },
+            {
+                "Sid": "VersionConditionPut",
+                "Effect": "Allow",
+                "Principal": { "AWS": [version_condition_user] },
+                "Action": ["s3:PutObject"],
+                "Resource": [object_resource.clone()]
+            },
+            {
+                "Sid": "VersionConditionReplicate",
+                "Effect": "Allow",
+                "Principal": { "AWS": [version_condition_user] },
+                "Action": ["s3:ReplicateObject"],
+                "Resource": [object_resource],
+                "Condition": {
+                    "StringEquals": {
+                        "s3:VersionId": conditional_version_id.clone()
+                    }
+                }
+            },
+            {
+                "Sid": "PaxContextArchives",
+                "Effect": "Allow",
+                "Principal": { "AWS": [pax_context_user] },
+                "Action": ["s3:PutObject", "s3:PutObjectRetention", "s3:PutObjectTagging"],
+                "Resource": context_archive_resources
+            },
+            {
+                "Sid": "PaxTagContextPut",
+                "Effect": "Allow",
+                "Principal": { "AWS": [pax_context_user] },
+                "Action": ["s3:PutObject"],
+                "Resource": [tag_entry_resource.clone()],
+                "Condition": {
+                    "StringEquals": {
+                        "s3:RequestObjectTag/classification": "public"
+                    }
+                }
+            },
+            {
+                "Sid": "PaxTagContextAction",
+                "Effect": "Allow",
+                "Principal": { "AWS": [pax_context_user] },
+                "Action": ["s3:PutObjectTagging"],
+                "Resource": [tag_entry_resource]
+            },
+            {
+                "Sid": "PaxLockContextPut",
+                "Effect": "Allow",
+                "Principal": { "AWS": [pax_context_user] },
+                "Action": ["s3:PutObject"],
+                "Resource": [lock_entry_resource.clone()],
+                "Condition": {
+                    "StringEquals": {
+                        "s3:object-lock-mode": "COMPLIANCE"
+                    }
+                }
+            },
+            {
+                "Sid": "PaxLockContextAction",
+                "Effect": "Allow",
+                "Principal": { "AWS": [pax_context_user] },
+                "Action": ["s3:PutObjectRetention"],
+                "Resource": [lock_entry_resource]
+            }
+        ]
+    })
+    .to_string();
+    admin_client.put_bucket_policy().bucket(bucket).policy(policy).send().await?;
+
+    let put_only_client = restricted_user_client(&env, put_only_user, put_only_secret);
+    let conditional_client = restricted_user_client(&env, conditional_user, conditional_secret);
+    let wrong_action_client = restricted_user_client(&env, wrong_action_user, wrong_action_secret);
+    let cases = [
+        (
+            "legal-hold.tar",
+            put_only_client,
+            HashMap::from([("minio.metadata.x-amz-object-lock-legal-hold", "ON".to_string())]),
+        ),
+        (
+            "retention-condition.tar",
+            conditional_client,
+            HashMap::from([
+                ("minio.metadata.x-amz-object-lock-mode", "COMPLIANCE".to_string()),
+                ("minio.metadata.x-amz-object-lock-retain-until-date", "2099-01-01T00:00:00Z".to_string()),
+            ]),
+        ),
+        (
+            "version-id.tar",
+            wrong_action_client,
+            HashMap::from([("minio.versionId", Uuid::new_v4().to_string())]),
+        ),
+    ];
+
+    for (archive_key, client, pax) in cases {
+        let archive = make_tar_with_pax_entry("entry.txt", b"must-not-write", None, &pax).await;
+        let err = client
+            .put_object()
+            .bucket(bucket)
+            .key(archive_key)
+            .body(ByteStream::from(archive))
+            .customize()
+            .mutate_request(|req| {
+                req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+            })
+            .send()
+            .await
+            .expect_err("missing, conditional, or wrong PAX privilege must be rejected");
+        assert_eq!(
+            err.as_service_error().and_then(|error| error.meta().code()),
+            Some("AccessDenied"),
+            "{archive_key}"
+        );
+    }
+
+    let version_condition_client = restricted_user_client(&env, version_condition_user, version_condition_secret);
+    let mismatching_version_pax = HashMap::from([("minio.versionId", Uuid::new_v4().to_string())]);
+    let archive = make_tar_with_pax_entry("version-mismatch-entry.txt", b"must-not-write", None, &mismatching_version_pax).await;
+    let err = version_condition_client
+        .put_object()
+        .bucket(bucket)
+        .key("version-mismatch.tar")
+        .body(ByteStream::from(archive))
+        .customize()
+        .mutate_request(|req| {
+            req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+        })
+        .send()
+        .await
+        .expect_err("a mismatching PAX version ID must fail the replication condition");
+    assert_eq!(err.as_service_error().and_then(|error| error.meta().code()), Some("AccessDenied"));
+    let err = admin_client
+        .head_object()
+        .bucket(bucket)
+        .key("version-mismatch-entry.txt")
+        .send()
+        .await
+        .expect_err("a denied PAX entry must not be written");
+    assert!(matches!(
+        err.as_service_error().and_then(|error| error.meta().code()),
+        Some("NoSuchKey" | "NotFound")
+    ));
+
+    let matching_version_pax = HashMap::from([("minio.versionId", conditional_version_id)]);
+    let archive = make_tar_with_pax_entry("condition-entry.txt", b"condition-body", None, &matching_version_pax).await;
+    version_condition_client
+        .put_object()
+        .bucket(bucket)
+        .key("version-condition.tar")
+        .body(ByteStream::from(archive))
+        .customize()
+        .mutate_request(|req| {
+            req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+        })
+        .send()
+        .await?;
+    let stored = admin_client
+        .get_object()
+        .bucket(bucket)
+        .key("condition-entry.txt")
+        .send()
+        .await?;
+    assert_eq!(stored.body.collect().await?.into_bytes().as_ref(), b"condition-body");
+
+    let pax_context_client = restricted_user_client(&env, pax_context_user, pax_context_secret);
+    let tag_pax = HashMap::from([("minio.metadata.x-amz-tagging", "classification=public".to_string())]);
+    let archive = make_tar_with_pax_entry("tag-context-entry.txt", b"tag-context-body", None, &tag_pax).await;
+    pax_context_client
+        .put_object()
+        .bucket(bucket)
+        .key("tag-context.tar")
+        .tagging("classification=restricted")
+        .body(ByteStream::from(archive))
+        .customize()
+        .mutate_request(|req| {
+            req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+        })
+        .send()
+        .await?;
+    let tags = admin_client
+        .get_object_tagging()
+        .bucket(bucket)
+        .key("tag-context-entry.txt")
+        .send()
+        .await?;
+    assert!(
+        tags.tag_set()
+            .iter()
+            .any(|tag| tag.key() == "classification" && tag.value() == "public")
+    );
+
+    let pax_retain_until = "2040-01-01T00:00:00Z";
+    let lock_pax = HashMap::from([
+        ("minio.metadata.x-amz-object-lock-mode", "COMPLIANCE".to_string()),
+        ("minio.metadata.x-amz-object-lock-retain-until-date", pax_retain_until.to_string()),
+    ]);
+    let archive = make_tar_with_pax_entry("lock-context-entry.txt", b"lock-context-body", None, &lock_pax).await;
+    pax_context_client
+        .put_object()
+        .bucket(bucket)
+        .key("lock-context.tar")
+        .object_lock_mode(aws_sdk_s3::types::ObjectLockMode::Governance)
+        .object_lock_retain_until_date(aws_sdk_s3::primitives::DateTime::from_secs(2_114_380_800))
+        .body(ByteStream::from(archive))
+        .customize()
+        .mutate_request(|req| {
+            req.headers_mut().insert("x-amz-meta-snowball-auto-extract", "true");
+        })
+        .send()
+        .await?;
+    let retention = admin_client
+        .get_object_retention()
+        .bucket(bucket)
+        .key("lock-context-entry.txt")
+        .send()
+        .await?
+        .retention()
+        .expect("PAX retention should be present")
+        .clone();
+    assert_eq!(retention.mode().map(|mode| mode.as_str()), Some("COMPLIANCE"));
+    assert_eq!(
+        retention
+            .retain_until_date()
+            .expect("PAX retain-until should be present")
+            .fmt(aws_sdk_s3::primitives::DateTimeFormat::DateTime)?,
+        pax_retain_until
+    );
+
+    Ok(())
+}
+
 #[tokio::test]
 #[serial]
 async fn test_signed_put_object_extract_accepts_compat_header() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {

crates/e2e_test/src/notification_startup_regression_test.rs

@@ -0,0 +1,153 @@
+// 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.
+
+//! Regression tests for the event notification startup race.
+//!
+//! Covers the recurring pattern where webhook/audit targets fail to load at boot
+//! due to startup ordering (notification runtime starts before server config is
+//! loaded). This has regressed 9+ times across beta.3 ~ beta.12.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5387: webhook notifications broken again in beta.9+
+//! - rustfs#5681: Audit webhook targets are not loaded at boot
+//! - rustfs#5401: Event Destinations broken again
+//! - rustfs#5183: Audit webhooks stay offline after restart
+//! - rustfs#5115: init_event_notifier loses startup race against server config load
+//! - rustfs#4796: Pulsar event destinations offline after restart
+//! - rustfs#5428: MQTT bucket notifications stop on restarted cluster node
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestEnvironment, init_logging};
+    use aws_sdk_s3::types::{BucketVersioningStatus, VersioningConfiguration};
+    use serial_test::serial;
+    use std::error::Error;
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    /// RT-01: Verify that the notification runtime initializes correctly at boot.
+    ///
+    /// Regression pattern: notification runtime initializes before server config
+    /// is fully loaded, causing webhook targets to never come online.
+    ///
+    /// This test verifies the startup ordering by checking that the server
+    /// starts successfully with notification enabled and can serve S3 requests.
+    /// A full webhook delivery test is in notification_webhook_test.rs.
+    #[tokio::test]
+    #[serial]
+    async fn test_notification_enabled_server_starts_cleanly() -> TestResult {
+        init_logging();
+        info!("RT-01: notification enabled server starts cleanly");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false"), ("RUSTFS_NOTIFY_ENABLE", "true")])
+            .await
+            .expect("start RustFS with notifications enabled");
+
+        let client = env.create_s3_client();
+        let bucket = "rt01-notify-startup";
+
+        // Server should be healthy and able to serve S3 requests
+        client
+            .create_bucket()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("create bucket with notifications enabled");
+
+        client
+            .put_object()
+            .bucket(bucket)
+            .key("test.txt")
+            .body(aws_sdk_s3::primitives::ByteStream::from_static(b"test"))
+            .send()
+            .await
+            .expect("put object with notifications enabled");
+
+        info!("RT-01 PASS: notification enabled server starts and serves S3");
+        Ok(())
+    }
+
+    /// RT-02: Verify notification config persists after server restart.
+    ///
+    /// Regression pattern: after a node restart, notification targets stay
+    /// offline permanently because the config is not re-loaded.
+    ///
+    /// Steps:
+    /// 1. Start server with notification enabled
+    /// 2. Create bucket and configure notification
+    /// 3. Restart server
+    /// 4. Verify notification config still exists
+    #[tokio::test]
+    #[serial]
+    async fn test_notification_config_survives_restart() -> TestResult {
+        init_logging();
+        info!("RT-02: notification config survives restart");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false"), ("RUSTFS_NOTIFY_ENABLE", "true")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt02-notify-restart";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Enable versioning (required for notification configuration)
+        client
+            .put_bucket_versioning()
+            .bucket(bucket)
+            .versioning_configuration(
+                VersioningConfiguration::builder()
+                    .status(BucketVersioningStatus::Enabled)
+                    .build(),
+            )
+            .send()
+            .await
+            .expect("enable versioning");
+
+        // Note: We can't fully test notification config persistence without a
+        // configured target. But we verify the server restarts cleanly with
+        // notification enabled, which is the core regression scenario.
+        env.restart_server_preserving_data(vec![], &[])
+            .await
+            .expect("restart RustFS with notifications enabled");
+
+        // Verify bucket still exists and is accessible after restart
+        let list = client
+            .list_objects_v2()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("list objects after restart");
+
+        assert!(list.contents().is_empty(), "RT-02: bucket should be empty after restart");
+
+        // Verify we can still write objects (notification runtime initialized)
+        client
+            .put_object()
+            .bucket(bucket)
+            .key("after-restart.txt")
+            .body(aws_sdk_s3::primitives::ByteStream::from_static(b"post-restart"))
+            .send()
+            .await
+            .expect("put object after restart — notification runtime must be initialized");
+
+        info!("RT-02 PASS: server with notifications survives restart");
+        Ok(())
+    }
+}

crates/e2e_test/src/notification_webhook_test.rs

@@ -24,7 +24,7 @@
 //!   * PUT / multipart-complete / DeleteObject / DeleteObjects each deliver one event with the correct
 //!     eventName, bucket, key, versionId and eTag.
 //!   * prefix/suffix filters drop non-matching keys (rule-engine gate).
-//!   * an event queued while the target endpoint is unreachable is redelivered
+//!   * an event queued while the target endpoint rejects delivery is redelivered
 //!     from the on-disk store once the endpoint recovers (store-and-forward).
 //!   * responseElements and the S3 response use the canonical request ID while
 //!     requestParameters preserve a conflicting client-supplied value.
@@ -897,11 +897,10 @@ async fn test_webhook_event_delivery_and_filtering() -> TestResult {
     Ok(())
 }
 
-/// An event queued while the target endpoint is unreachable survives on the
+/// An event queued while the target endpoint rejects delivery survives on the
 /// durable store and is redelivered once the endpoint comes back.
 #[tokio::test]
 #[serial]
-#[ignore = "FAILING deterministically on main since it landed (#4821): the target is created but never appears in /rustfs/admin/v3/target/arns, so wait_for_target_registered times out. Quarantined per the flake policy; remove with the fix for rustfs#4852"]
 async fn test_webhook_redelivers_event_after_target_recovers() -> TestResult {
     init_logging();
 
@@ -932,28 +931,55 @@ async fn test_webhook_redelivers_event_after_target_recovers() -> TestResult {
     wait_for_target_registered(&env, target).await?;
     put_notification_config(&client, bucket, target, "uploads/", ".dat").await?;
 
-    // Take the endpoint down (drops the listener, so connections are refused —
-    // a retryable NotConnected), then PUT: the event cannot be delivered and
-    // must survive on the durable queue store.
+    // Replace the healthy setup listener with one that rejects the first POST.
+    // Waiting for that response below proves the queued event reached a failed
+    // delivery attempt before the endpoint recovers.
     setup_handle.abort();
     let _ = setup_handle.await;
 
+    let listener = TcpListener::bind(("0.0.0.0", port)).await?;
     let key = "uploads/redeliver.dat";
     client
         .put_object()
         .bucket(bucket)
         .key(key)
-        .body(ByteStream::from_static(b"queued while target down"))
+        .body(ByteStream::from_static(b"queued while target rejects"))
         .send()
         .await?;
 
-    // Hold the endpoint down long enough for at least one replay attempt to
-    // fail (the replay worker scans the store every 500ms), so recovery below
-    // exercises real redelivery rather than a first-attempt success.
-    tokio::time::sleep(Duration::from_secs(2)).await;
+    let mut failure_handle = tokio::spawn(async move {
+        loop {
+            let (mut stream, _) = listener.accept().await?;
+            let (method, _) = timeout(Duration::from_secs(5), read_http_message(&mut stream)).await??;
+            if method == "HEAD" {
+                stream
+                    .write_all(b"HTTP/1.1 200 OK\r\ncontent-length: 0\r\nconnection: close\r\n\r\n")
+                    .await?;
+                stream.shutdown().await?;
+                continue;
+            }
+            if method == "POST" {
+                stream
+                    .write_all(b"HTTP/1.1 503 Service Unavailable\r\ncontent-length: 0\r\nconnection: close\r\n\r\n")
+                    .await?;
+                stream.shutdown().await?;
+                return Ok::<(), BoxError>(());
+            }
+        }
+    });
 
-    // Bring the endpoint back on the same port; the replay worker retries with
-    // exponential backoff and delivers the queued event.
+    let rejected = match timeout(Duration::from_secs(20), &mut failure_handle).await {
+        Ok(rejected) => rejected,
+        Err(_) => {
+            failure_handle.abort();
+            let _ = failure_handle.await;
+            return Err("webhook replay did not reach the rejecting endpoint".into());
+        }
+    };
+    rejected??;
+
+    // Bring the endpoint back on the same port; the replay worker rescans the
+    // durable queue and delivers the retained event.
     let listener = TcpListener::bind(("0.0.0.0", port)).await?;
     let (tx, mut rx) = mpsc::unbounded_channel();
     let handle = serve_event_collector(listener, tx);

crates/e2e_test/src/quota_test.rs

@@ -12,9 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common::{RustFSTestEnvironment, awscurl_delete, awscurl_get, awscurl_post, awscurl_put, init_logging};
+use crate::common::{RustFSTestEnvironment, admin_request, awscurl_delete, awscurl_get, awscurl_post, awscurl_put, init_logging};
 use aws_sdk_s3::Client;
+use http::{Method, StatusCode};
 use serial_test::serial;
+use tokio::time::{Duration, sleep, timeout};
 use tracing::{debug, info};
 
 fn skip_without_awscurl() -> bool {
@@ -37,7 +39,8 @@ impl QuotaTestEnv {
     pub async fn new() -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
         let bucket_name = format!("quota-test-{}", uuid::Uuid::new_v4());
         let mut env = RustFSTestEnvironment::new().await?;
-        env.start_rustfs_server(vec![]).await?;
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_SCANNER_CYCLE", "1"), ("RUSTFS_SCANNER_START_DELAY_SECS", "0")])
+            .await?;
         let client = env.create_s3_client();
 
         Ok(Self {
@@ -67,18 +70,7 @@ impl QuotaTestEnv {
     }
 
     pub async fn set_bucket_quota(&self, quota_bytes: u64) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-        let url = format!("{}/rustfs/admin/v3/quota/{}", self.env.url, self.bucket_name);
-        let quota_config = serde_json::json!({
-            "quota": quota_bytes,
-            "quota_type": "HARD"
-        });
-
-        let response = awscurl_put(&url, &quota_config.to_string(), &self.env.access_key, &self.env.secret_key).await?;
-        if response.contains("error") {
-            Err(format!("Failed to set quota: {}", response).into())
-        } else {
-            Ok(())
-        }
+        self.set_bucket_quota_for(&self.bucket_name, quota_bytes).await
     }
 
     pub async fn get_bucket_quota(&self) -> Result<Option<u64>, Box<dyn std::error::Error + Send + Sync>> {
@@ -178,6 +170,29 @@ impl QuotaTestEnv {
         bucket: &str,
         quota_bytes: u64,
     ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+        let stats_path = format!("/rustfs/admin/v3/quota-stats/{bucket}");
+        let readiness = async {
+            loop {
+                let (status, response) =
+                    admin_request(&self.env.url, Method::GET, &stats_path, None, &self.env.access_key, &self.env.secret_key)
+                        .await?;
+                if status.is_success() {
+                    return Ok::<(), Box<dyn std::error::Error + Send + Sync>>(());
+                }
+                if status != StatusCode::SERVICE_UNAVAILABLE {
+                    return Err(format!("quota usage readiness failed for {bucket}: {status} {response}").into());
+                }
+
+                sleep(Duration::from_secs(1)).await;
+            }
+        };
+        match timeout(Duration::from_secs(30), readiness).await {
+            Ok(result) => result?,
+            Err(_) => {
+                return Err(format!("quota usage did not become authoritative for {bucket} within 30 seconds").into());
+            }
+        }
+
         let url = format!("{}/rustfs/admin/v3/quota/{}", self.env.url, bucket);
         let quota_config = serde_json::json!({
             "quota": quota_bytes,

crates/e2e_test/src/sts_query_compat_test.rs

@@ -12,13 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::common::{RustFSTestEnvironment, admin_ok, init_logging};
-use aws_sdk_sts::config::retry::RetryConfig;
-use aws_sdk_sts::config::{Credentials, Region};
+use crate::common::{RustFSTestEnvironment, admin_ok, build_test_s3_config, build_test_sts_client, init_logging};
+use aws_sdk_sts::Client;
 use aws_sdk_sts::error::ProvideErrorMetadata;
 use aws_sdk_sts::operation::RequestId;
-use aws_sdk_sts::{Client, Config};
-use aws_smithy_http_client::Builder as SmithyHttpClientBuilder;
 use bytes::Bytes;
 use http::header::{AUTHORIZATION, CONTENT_TYPE};
 use http::{Request, Response};
@@ -32,9 +29,8 @@ use serial_test::serial;
 use std::collections::BTreeSet;
 use std::convert::Infallible;
 use std::error::Error;
-use std::sync::Arc;
 use tokio::net::TcpListener;
-use tokio::sync::{Notify, mpsc};
+use tokio::sync::mpsc;
 use tokio::task::{JoinHandle, JoinSet};
 use tokio::time::{Duration, timeout};
 
@@ -43,22 +39,7 @@ type TestResult = Result<(), BoxError>;
 const OPA_AUTH_TOKEN: &str = "sts-opa-token";
 
 fn sts_client(url: &str, access_key: &str, secret_key: &str, session_token: Option<&str>) -> Client {
-    let mut config = Config::builder()
-        .credentials_provider(Credentials::new(
-            access_key,
-            secret_key,
-            session_token.map(str::to_owned),
-            None,
-            "e2e-sts-query-compat",
-        ))
-        .region(Region::new("us-east-1"))
-        .endpoint_url(url)
-        .retry_config(RetryConfig::standard().with_max_attempts(1))
-        .behavior_version_latest();
-    if url.starts_with("http://") {
-        config = config.http_client(SmithyHttpClientBuilder::new().build_http());
-    }
-    Client::from_conf(config.build())
+    build_test_sts_client(url, access_key, secret_key, session_token, "e2e-sts-query-compat")
 }
 
 async fn create_root_service_account(env: &RustFSTestEnvironment) -> Result<(String, String), BoxError> {
@@ -145,6 +126,52 @@ async fn assert_access_denied(client: &Client, context: &str) -> TestResult {
     Ok(())
 }
 
+async fn assert_list_buckets_access_denied(
+    env: &RustFSTestEnvironment,
+    access_key: &str,
+    secret_key: &str,
+    context: &str,
+) -> TestResult {
+    let error = aws_sdk_s3::Client::from_conf(build_test_s3_config(
+        &env.url,
+        access_key,
+        secret_key,
+        None,
+        "e2e-list-buckets-opa-unavailable",
+    ))
+    .list_buckets()
+    .send()
+    .await
+    .expect_err("ListBuckets must be denied while OPA is unavailable");
+    let service_error = error
+        .as_service_error()
+        .ok_or_else(|| format!("{context} should deserialize as an S3 service error: {error:?}"))?;
+
+    assert_eq!(error.raw_response().map(|response| response.status().as_u16()), Some(403));
+    assert_eq!(service_error.code(), Some("AccessDenied"));
+    Ok(())
+}
+
+async fn assert_opa_unavailable_denies_sts_and_list_buckets(env: &RustFSTestEnvironment, context: &str) -> TestResult {
+    let user = "opaunavailable";
+    let secret = "stsOpaUnavailableSecret123";
+    create_user_with_policy(
+        env,
+        user,
+        secret,
+        "sts-opa-unavailable-local-policy",
+        serde_json::json!([{
+            "Effect": "Allow",
+            "Action": ["s3:ListAllMyBuckets"],
+            "Resource": ["arn:aws:s3:::*"],
+        }]),
+    )
+    .await?;
+
+    assert_access_denied(&sts_client(&env.url, user, secret, None), context).await?;
+    assert_list_buckets_access_denied(env, user, secret, context).await
+}
+
 async fn handle_opa_request(
     request: Request<Incoming>,
     requests: mpsc::UnboundedSender<Value>,
@@ -186,12 +213,15 @@ async fn handle_opa_request(
     };
     if payload.is_none() {
         let _ = validation_started.send(());
-        if let OpaValidationMode::DelayedUnavailable(release) = validation_mode {
-            release.notified().await;
-            return Ok(Response::builder()
-                .status(503)
-                .body(Full::new(Bytes::new()))
-                .expect("static OPA unavailable response must be valid"));
+        match validation_mode {
+            OpaValidationMode::Blocked => std::future::pending::<()>().await,
+            OpaValidationMode::Unavailable => {
+                return Ok(Response::builder()
+                    .status(503)
+                    .body(Full::new(Bytes::new()))
+                    .expect("static OPA unavailable response must be valid"));
+            }
+            OpaValidationMode::Ready => {}
         }
     }
     let allow = match payload.as_ref().and_then(|value| value.pointer("/input/identity/account")) {
@@ -201,6 +231,25 @@ async fn handle_opa_request(
             .and_then(Value::as_bool)
             .unwrap_or(false),
         Some(Value::String(account)) if account == "opadeny" => false,
+        Some(Value::String(account))
+            if account == "opaunavailable" && matches!(validation_mode, OpaValidationMode::Unavailable) =>
+        {
+            true
+        }
+        Some(Value::String(account)) if account == "opalistbuckets" => {
+            let action = payload
+                .as_ref()
+                .and_then(|value| value.pointer("/input/action"))
+                .and_then(Value::as_str);
+            let bucket = payload
+                .as_ref()
+                .and_then(|value| value.pointer("/input/resource/bucket"))
+                .and_then(Value::as_str);
+            matches!(
+                (action, bucket),
+                (Some("s3:ListBucket"), Some("opa-list-visible")) | (Some("s3:GetBucketLocation"), Some("opa-list-location"))
+            )
+        }
         None => true,
         _ => false,
     };
@@ -215,17 +264,17 @@ async fn handle_opa_request(
         .expect("static OPA response must be valid"))
 }
 
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 enum OpaValidationMode {
     Ready,
-    DelayedUnavailable(Arc<Notify>),
+    Blocked,
+    Unavailable,
 }
 
 struct OpaMock {
     url: String,
     requests: mpsc::UnboundedReceiver<Value>,
     validation_started: mpsc::UnboundedReceiver<()>,
-    validation_release: Option<Arc<Notify>>,
     task: JoinHandle<()>,
 }
 
@@ -234,9 +283,8 @@ impl OpaMock {
         Self::start_with_mode(OpaValidationMode::Ready, Some(OPA_AUTH_TOKEN)).await
     }
 
-    async fn start_delayed_unavailable() -> Result<Self, BoxError> {
-        let release = Arc::new(Notify::new());
-        Self::start_with_mode(OpaValidationMode::DelayedUnavailable(release), None).await
+    async fn start_blocked() -> Result<Self, BoxError> {
+        Self::start_with_mode(OpaValidationMode::Blocked, None).await
     }
 
     async fn start_with_mode(validation_mode: OpaValidationMode, auth_token: Option<&str>) -> Result<Self, BoxError> {
@@ -245,10 +293,6 @@ impl OpaMock {
         let (requests_tx, requests) = mpsc::unbounded_channel();
         let (validation_started_tx, validation_started) = mpsc::unbounded_channel();
         let expected_authorization = auth_token.map(|token| format!("Bearer {token}"));
-        let validation_release = match &validation_mode {
-            OpaValidationMode::Ready => None,
-            OpaValidationMode::DelayedUnavailable(release) => Some(Arc::clone(release)),
-        };
         let task = tokio::spawn(async move {
             let mut connections = JoinSet::new();
             loop {
@@ -257,7 +301,7 @@ impl OpaMock {
                         let Ok((stream, _)) = accepted else { break };
                         let requests = requests_tx.clone();
                         let validation_started = validation_started_tx.clone();
-                        let validation_mode = validation_mode.clone();
+                        let validation_mode = validation_mode;
                         let expected_authorization = expected_authorization.clone();
                         connections.spawn(async move {
                             let handler = service_fn(move |request| {
@@ -265,7 +309,7 @@ impl OpaMock {
                                     request,
                                     requests.clone(),
                                     validation_started.clone(),
-                                    validation_mode.clone(),
+                                    validation_mode,
                                     expected_authorization.clone(),
                                 )
                             });
@@ -282,7 +326,6 @@ impl OpaMock {
             url,
             requests,
             validation_started,
-            validation_release,
             task,
         })
     }
@@ -298,12 +341,6 @@ impl OpaMock {
             .await?
             .ok_or_else(|| "OPA validation channel closed".into())
     }
-
-    fn release_validation(&self) {
-        if let Some(release) = &self.validation_release {
-            release.notify_one();
-        }
-    }
 }
 
 impl Drop for OpaMock {
@@ -523,35 +560,119 @@ async fn test_sts_assume_role_opa_contract() -> TestResult {
 
 #[tokio::test]
 #[serial]
-async fn test_sts_assume_role_fails_closed_while_opa_is_unavailable() -> TestResult {
+async fn test_list_buckets_opa_contract() -> TestResult {
     init_logging();
 
-    let mut opa = OpaMock::start_delayed_unavailable().await?;
+    let mut opa = OpaMock::start().await?;
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server_with_env(
+        vec![],
+        &[
+            ("RUSTFS_POLICY_PLUGIN_URL", opa.url.as_str()),
+            ("RUSTFS_POLICY_PLUGIN_AUTH_TOKEN", OPA_AUTH_TOKEN),
+        ],
+    )
+    .await?;
+
+    let admin_client = env.create_s3_client();
+    for bucket in ["opa-list-hidden", "opa-list-location", "opa-list-visible"] {
+        admin_client.create_bucket().bucket(bucket).send().await?;
+    }
+
+    let user = "opalistbuckets";
+    let secret = "opaListBucketsSecret123";
+    create_user(&env, user, secret).await?;
+
+    let output = aws_sdk_s3::Client::from_conf(build_test_s3_config(&env.url, user, secret, None, "e2e-list-buckets-opa"))
+        .list_buckets()
+        .send()
+        .await?;
+    let mut names = output
+        .buckets()
+        .iter()
+        .filter_map(|bucket| bucket.name().map(str::to_owned))
+        .collect::<Vec<_>>();
+    names.sort();
+    assert_eq!(names, ["opa-list-location", "opa-list-visible"]);
+
+    let mut evaluations = BTreeSet::new();
+    for _ in 0..6 {
+        let request = opa.next_request().await?;
+        assert_eq!(request.pointer("/input/identity/account").and_then(Value::as_str), Some(user));
+        assert_eq!(request.pointer("/input/context/deny_only").and_then(Value::as_bool), Some(false));
+
+        let action = request
+            .pointer("/input/action")
+            .and_then(Value::as_str)
+            .ok_or("OPA ListBuckets input should include action")?;
+        let bucket = request
+            .pointer("/input/resource/bucket")
+            .and_then(Value::as_str)
+            .ok_or("OPA ListBuckets input should include resource.bucket")?;
+        if bucket.is_empty() {
+            assert_eq!(action, "s3:ListAllMyBuckets");
+            assert!(request.pointer("/input/context/conditions/prefix").is_none());
+            assert!(request.pointer("/input/context/conditions/delimiter").is_none());
+        } else {
+            let expected_arn = format!("arn:aws:s3:::{bucket}");
+            assert_eq!(request.pointer("/input/context/conditions/prefix"), Some(&serde_json::json!([""])));
+            assert_eq!(request.pointer("/input/context/conditions/delimiter"), Some(&serde_json::json!(["/"])));
+            assert_eq!(
+                request.pointer("/input/resource/arn").and_then(Value::as_str),
+                Some(expected_arn.as_str())
+            );
+        }
+        evaluations.insert((action.to_owned(), bucket.to_owned()));
+    }
+    assert_eq!(
+        evaluations,
+        BTreeSet::from([
+            ("s3:GetBucketLocation".to_owned(), "opa-list-hidden".to_owned()),
+            ("s3:GetBucketLocation".to_owned(), "opa-list-location".to_owned()),
+            ("s3:ListAllMyBuckets".to_owned(), String::new()),
+            ("s3:ListBucket".to_owned(), "opa-list-hidden".to_owned()),
+            ("s3:ListBucket".to_owned(), "opa-list-location".to_owned()),
+            ("s3:ListBucket".to_owned(), "opa-list-visible".to_owned()),
+        ])
+    );
+    assert!(
+        matches!(opa.requests.try_recv(), Err(mpsc::error::TryRecvError::Empty)),
+        "ListBuckets should not make redundant OPA evaluations"
+    );
+
+    env.stop_server();
+    Ok(())
+}
+
+#[tokio::test]
+#[serial]
+async fn test_sts_and_list_buckets_fail_closed_while_opa_is_initializing() -> TestResult {
+    init_logging();
+
+    let mut opa = OpaMock::start_blocked().await?;
     let mut env = RustFSTestEnvironment::new().await?;
     env.start_rustfs_server_with_env(vec![], &[("RUSTFS_POLICY_PLUGIN_URL", opa.url.as_str())])
         .await?;
     opa.wait_for_validation().await?;
 
-    let user = "opaunavailable";
-    let secret = "stsOpaUnavailableSecret123";
-    create_user_with_policy(
-        &env,
-        user,
-        secret,
-        "sts-opa-unavailable-local-policy",
-        serde_json::json!([{
-            "Effect": "Allow",
-            "Action": ["s3:ListAllMyBuckets"],
-            "Resource": ["arn:aws:s3:::*"],
-        }]),
-    )
-    .await?;
+    assert_opa_unavailable_denies_sts_and_list_buckets(&env, "configured OPA initialization").await?;
 
-    assert_access_denied(&sts_client(&env.url, user, secret, None), "configured OPA initialization").await?;
+    env.stop_server();
+    Ok(())
+}
 
-    opa.release_validation();
-    tokio::time::sleep(Duration::from_millis(200)).await;
-    assert_access_denied(&sts_client(&env.url, user, secret, None), "configured OPA validation failure").await?;
+#[tokio::test]
+#[serial]
+async fn test_sts_and_list_buckets_fail_closed_after_opa_validation_failure() -> TestResult {
+    init_logging();
+
+    let mut opa = OpaMock::start_with_mode(OpaValidationMode::Unavailable, None).await?;
+    let mut env = RustFSTestEnvironment::new().await?;
+    env.start_rustfs_server_with_env(vec![], &[("RUSTFS_POLICY_PLUGIN_URL", opa.url.as_str())])
+        .await?;
+    opa.wait_for_validation().await?;
+
+    assert_opa_unavailable_denies_sts_and_list_buckets(&env, "configured OPA validation failure").await?;
 
     env.stop_server();
     Ok(())

crates/e2e_test/src/tier_transition_regression_test.rs

@@ -0,0 +1,172 @@
+// 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.
+
+//! Regression tests for Tier/ILM transition operations.
+//!
+//! Covers the recurring pattern where tier transition fails silently, the
+//! free-version recovery task loops forever, or transitioned objects cannot
+//! be read back. This has regressed 6+ times.
+//!
+//! ## Regression Issues
+//!
+//! - rustfs#5218: Remote tier mutation commit failed
+//! - rustfs#5130: tier_free_version_recovery task loops forever
+//! - rustfs#5011: Idle tier free-version recovery rescans every 60 seconds
+//! - rustfs#4826: Full GET of multipart transitioned object fails
+//! - rustfs#5024: Some files succeeded in tier offloading, others failed
+
+#[cfg(test)]
+mod tests {
+    use crate::common::{RustFSTestEnvironment, admin_ok, init_logging};
+    use serde_json::Value;
+    use serial_test::serial;
+    use std::error::Error;
+    use tracing::info;
+
+    type TestResult = Result<(), Box<dyn Error + Send + Sync>>;
+
+    /// RT-13: Verify lifecycle rule with transition persists and is retrievable.
+    ///
+    /// Note: Actual transition requires a configured remote tier. This test
+    /// validates that an expiration-only rule (the persistence path) survives
+    /// a server restart.
+    #[tokio::test]
+    #[serial]
+    async fn test_lifecycle_rule_persists_after_restart() -> TestResult {
+        init_logging();
+        info!("RT-13: lifecycle rule persists after restart");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        let client = env.create_s3_client();
+        let bucket = "rt13-tier-persist";
+
+        client.create_bucket().bucket(bucket).send().await.expect("create bucket");
+
+        // Apply a lifecycle rule with expiration (transition needs a real tier)
+        let rule = aws_sdk_s3::types::LifecycleRule::builder()
+            .id("expire-after-90d")
+            .status(aws_sdk_s3::types::ExpirationStatus::Enabled)
+            .filter(aws_sdk_s3::types::LifecycleRuleFilter::builder().prefix("archive/").build())
+            .expiration(aws_sdk_s3::types::LifecycleExpiration::builder().days(90).build())
+            .build()
+            .expect("build rule");
+
+        client
+            .put_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .lifecycle_configuration(
+                aws_sdk_s3::types::BucketLifecycleConfiguration::builder()
+                    .rules(rule)
+                    .build()
+                    .expect("build config"),
+            )
+            .send()
+            .await
+            .expect("put lifecycle");
+
+        // Restart server
+        env.restart_server_preserving_data(vec![], &[]).await.expect("restart RustFS");
+
+        // Verify the rule survived restart
+        let resp = client
+            .get_bucket_lifecycle_configuration()
+            .bucket(bucket)
+            .send()
+            .await
+            .expect("get lifecycle after restart");
+
+        let rules = resp.rules();
+        assert_eq!(rules.len(), 1, "RT-13 FAIL: expected 1 rule after restart");
+
+        let exp = rules[0].expiration().expect("expiration should be set");
+        assert_eq!(exp.days(), Some(90), "RT-13 FAIL: expiration days corrupted after restart");
+
+        info!("RT-13 PASS: lifecycle rule persists after restart");
+        Ok(())
+    }
+
+    /// RT-13b: Verify admin tier configuration API is functional.
+    ///
+    /// Regression pattern: tier add/verify/delete API fails or the tier
+    /// configuration is not persisted (rustfs#5218).
+    #[tokio::test]
+    #[serial]
+    async fn test_admin_tier_list_endpoint_returns_json() -> TestResult {
+        init_logging();
+        info!("RT-13b: admin tier list endpoint returns JSON");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        // Query the tier list endpoint
+        let body = admin_ok(&env, http::Method::GET, "/rustfs/admin/v3/tier", None)
+            .await
+            .expect("list remote tiers");
+
+        let json: Value = serde_json::from_str(&body).expect("tier list response should be valid JSON");
+
+        // Should return an array (possibly empty)
+        assert!(json.is_array(), "RT-13b FAIL: tier list response is not an array: {json}");
+
+        info!("RT-13b PASS: admin tier list endpoint returns valid JSON array");
+        Ok(())
+    }
+
+    /// RT-13c: Verify scanner configuration persistence.
+    ///
+    /// Regression pattern: scanner admin config update reports success but
+    /// is not persisted (rustfs#5013), causing the scanner to not run or
+    /// use stale settings.
+    #[tokio::test]
+    #[serial]
+    async fn test_scanner_config_persists_after_restart() -> TestResult {
+        init_logging();
+        info!("RT-13c: scanner config persists after restart");
+
+        let mut env = RustFSTestEnvironment::new().await.expect("create test environment");
+        env.start_rustfs_server_with_env(vec![], &[("RUSTFS_CONSOLE_ENABLE", "false")])
+            .await
+            .expect("start RustFS");
+
+        // Get current scanner status
+        let body = admin_ok(&env, http::Method::GET, "/rustfs/admin/v3/scanner/status", None)
+            .await
+            .expect("get scanner status");
+
+        let json: Value = serde_json::from_str(&body).expect("scanner status should be valid JSON");
+
+        info!("  scanner status: {:?}", json.as_object().map(|o| o.keys().collect::<Vec<_>>()));
+
+        // Restart and verify config is still accessible
+        env.restart_server_preserving_data(vec![], &[]).await.expect("restart RustFS");
+
+        let body2 = admin_ok(&env, http::Method::GET, "/rustfs/admin/v3/scanner/status", None)
+            .await
+            .expect("get scanner status after restart");
+
+        let json2: Value = serde_json::from_str(&body2).expect("scanner status after restart should be valid JSON");
+
+        // Both should be valid JSON objects
+        assert!(json2.is_object(), "RT-13c FAIL: scanner status after restart is not a valid JSON object");
+
+        info!("RT-13c PASS: scanner/config persists across restart");
+        Ok(())
+    }
+}

crates/ecstore/Cargo.toml

@@ -144,11 +144,13 @@ rustfs-lifecycle.workspace = true
 rustfs-s3-types = { workspace = true }
 rustfs-data-usage.workspace = true
 rustfs-object-capacity.workspace = true
+rustfs-object-data-cache = { workspace = true, features = ["runtime-memory"] }
 arc-swap.workspace = true
 async-trait.workspace = true
 bytes = { workspace = true, features = ["serde"] }
 byteorder = { workspace = true }
 chrono = { workspace = true, features = ["serde"] }
+jiff = { workspace = true, features = ["serde"] }
 glob = { workspace = true }
 thiserror.workspace = true
 flatbuffers.workspace = true

crates/ecstore/src/api/mod.rs

@@ -130,13 +130,15 @@ pub mod bucket {
 
     pub mod metadata_sys {
         pub use crate::bucket::metadata_sys::{
-            BucketMetadataSys, acquire_bucket_metadata_transaction_lock, delete, get, get_accelerate_config, get_bucket_policy,
+            BucketMetadataMutationGuard, BucketMetadataSys, ObjectLockConfigState, acquire_bucket_metadata_transaction_lock,
+            capture_bucket_metadata_incarnation, delete, delete_if_incarnation, 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_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_under_transaction_lock,
+            get_object_lock_config, get_object_lock_config_state, 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_under_transaction_lock,
         };
     }
 
@@ -178,20 +180,24 @@ pub mod bucket {
             mrf_backlog_observability_snapshot,
         };
         pub use crate::bucket::replication::{
-            BucketReplicationResyncStatus, BucketStats, DeleteReplicationConfigSnapshot, DeletedObjectReplicationInfo,
-            DurableMrfBacklog, DynReplicationPool, MrfOpKind, MrfReplicateEntry, MustReplicateOptions, ObjectOpts,
-            REPLICATE_INCOMING_DELETE, ReplicateDecision, ReplicateObjectInfo, ReplicationConfig, ReplicationConfigurationExt,
+            BucketReplicationResyncStatus, BucketReplicationStats, BucketStats, DeleteReplicationConfigSnapshot,
+            DeletedObjectReplicationInfo, DurableMrfBacklog, DynReplicationPool, MrfOpKind, MrfReplicateEntry,
+            MustReplicateOptions, ObjectOpts, REMOTE_TARGET_CAPABILITY_CONTRACT_VERSION, REMOTE_TARGET_UNSUPPORTED_FIELDS,
+            REMOTE_TARGET_WRITABLE_FIELDS, REPLICATE_INCOMING_DELETE, REPLICATION_CAPABILITY_CONTRACT_VERSION,
+            REPLICATION_READ_ONLY_HISTORICAL_FIELDS, REPLICATION_WRITABLE_FIELDS, ReplicateDecision, ReplicateObjectInfo,
+            ReplicationBatchAdmission, ReplicationConfig, ReplicationConfigStructureError, ReplicationConfigurationExt,
             ReplicationDeleteScheduleInput, ReplicationDeleteStateSource, ReplicationHealQueueResult, ReplicationObjectBridge,
             ReplicationObjectIO, ReplicationOperation, ReplicationPoolTrait, ReplicationPriority, ReplicationQueueAdmission,
             ReplicationScannerBridge, ReplicationState, ReplicationStats, ReplicationStatusType, ReplicationStorage,
             ReplicationTargetValidationError, ReplicationType, ResyncOpts, ResyncStatusType, RuntimeReplicationTargetBacklog,
-            TargetReplicationResyncStatus, VersionPurgeStatusType, delete_replication_state_from_config,
-            delete_replication_version_id, get_global_replication_pool, get_global_replication_stats,
-            init_background_replication, invalid_replication_config_status_field, read_durable_mrf_backlog,
-            replication_state_to_filemeta, replication_status_to_filemeta, replication_statuses_map, replication_target_arns,
-            resync_start_conflict_id, should_remove_replication_target, should_schedule_delete_replication,
-            should_use_existing_delete_replication_info, should_use_existing_delete_replication_source,
-            unsupported_replication_config_field, validate_replication_config_target_arns, version_purge_status_to_filemeta,
+            TargetReplicationResyncStatus, VersionPurgeStatusType, commit_force_delete_intent, complete_force_delete_intent,
+            delete_replication_state_from_config, delete_replication_version_id, get_global_replication_pool,
+            get_global_replication_stats, init_background_replication, invalid_replication_config_status_field,
+            persist_force_delete_intent, read_durable_mrf_backlog, replication_state_to_filemeta, replication_status_to_filemeta,
+            replication_statuses_map, replication_target_arns, resync_start_conflict_id, should_remove_replication_target,
+            should_schedule_delete_replication, should_use_existing_delete_replication_info,
+            should_use_existing_delete_replication_source, unsupported_replication_config_field,
+            validate_replication_config_structure, validate_replication_config_target_arns, version_purge_status_to_filemeta,
         };
     }
 
@@ -200,7 +206,9 @@ pub mod bucket {
     }
 
     pub mod target {
-        pub use crate::bucket::target::{ARN, BucketTarget, BucketTargetType, BucketTargets, Credentials, LatencyStat};
+        pub use crate::bucket::target::{
+            ARN, BucketTarget, BucketTargetType, BucketTargets, Credentials, LatencyStat, duration_from_secs_or_nanos,
+        };
     }
 
     pub mod utils {
@@ -302,7 +310,8 @@ pub mod config {
 pub mod data_usage {
     pub use crate::data_usage::{
         DATA_USAGE_CACHE_NAME, apply_bucket_usage_memory_overlay, compute_bucket_usage,
-        init_compression_total_memory_from_backend, invalidate_data_usage_snapshot_cache, live_bucket_usage_computations,
+        init_compression_total_memory_from_backend, invalidate_admin_data_usage_snapshot_cache,
+        invalidate_data_usage_snapshot_cache, live_bucket_usage_computations, load_admin_data_usage_from_backend_cached,
         load_compression_total_from_memory, load_data_usage_from_backend, load_data_usage_from_backend_cached,
         record_bucket_delete_marker_memory, record_bucket_object_delete_memory, record_bucket_object_version_write_memory,
         record_bucket_object_write_memory, record_bucket_object_write_unknown_previous_memory, record_compression_total_memory,
@@ -399,11 +408,11 @@ pub mod notification {
 pub mod object {
     pub use crate::object_api::{
         BLOCK_SIZE_V2, ERASURE_ALGORITHM, EncryptionResolutionError, EncryptionResolutionErrorKind, GetObjectBodyCacheHook,
-        GetObjectBodyCacheHookLookup, GetObjectBodySource, GetObjectReader, ObjectEncryptionResolver, ObjectInfo,
-        ObjectMutationHook, ObjectOptions, PutObjReader, RangedDecompressReader, ReadEncryptionMaterial, ReadEncryptionMode,
-        ReadEncryptionRequest, 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,
+        GetObjectBodyCacheHookLookup, GetObjectBodySource, GetObjectReader, NamespaceLockFence, ObjectEncryptionResolver,
+        ObjectInfo, ObjectLockConfigSnapshot, ObjectMutationHook, ObjectOptions, PutObjReader, RangedDecompressReader,
+        ReadEncryptionMaterial, ReadEncryptionMode, ReadEncryptionRequest, 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,
     };
     pub use crate::store::PreparedGetObjectReader;
 }
@@ -431,7 +440,7 @@ pub mod rpc {
         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, normalize_tonic_rpc_audience,
         set_tonic_canonical_body_digest, sign_ns_scanner_capability, sign_tonic_rpc_response_proof, tonic_boot_epoch_challenge,
-        tonic_boot_epoch_response_headers, verify_rpc_signature, verify_tonic_boot_epoch_response,
+        tonic_boot_epoch_response_headers, tonic_rpc_auth_failure_reason, verify_rpc_signature, verify_tonic_boot_epoch_response,
         verify_tonic_canonical_body_digest, verify_tonic_mutation_body_digest, verify_tonic_rpc_response_proof,
         verify_tonic_rpc_signature, verify_tonic_rpc_signature_with_bootstrap,
     };

crates/ecstore/src/bucket/lifecycle/metadata_boundary.rs

@@ -12,20 +12,127 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use s3s::dto::{BucketLifecycleConfiguration, ObjectLockConfiguration, ReplicationConfiguration};
-use time::OffsetDateTime;
+use std::sync::Arc;
 
-use crate::bucket::metadata_sys;
-use crate::error::Result;
+use s3s::dto::{BucketLifecycleConfiguration, ObjectLockConfiguration};
+use time::OffsetDateTime;
+use uuid::Uuid;
+
+use crate::bucket::metadata_sys::{self, ObjectLockConfigState};
+use crate::error::{Error, Result};
+
+#[derive(Debug)]
+pub(crate) struct LifecycleExpiryConfigs {
+    pub(crate) lifecycle: Option<Arc<BucketLifecycleConfiguration>>,
+    pub(crate) object_lock: Option<Arc<ObjectLockConfiguration>>,
+    pub(crate) bucket_incarnation_id: Uuid,
+}
+
+pub(crate) async fn get_expiry_configs(api: &crate::store::ECStore, bucket: &str) -> Result<LifecycleExpiryConfigs> {
+    let bucket_incarnation_id = api.bucket_incarnation_id_from_disk(bucket).await?;
+    let sys = metadata_sys::bucket_metadata_sys_of(&api.ctx)?;
+    let sys = sys.read().await.clone();
+    let metadata = sys.get_authoritative_metadata(bucket).await?;
+    if !metadata.bucket_incarnation_sidecar || metadata.bucket_incarnation_id != bucket_incarnation_id {
+        return Err(Error::other(format!("bucket lifecycle metadata is not authoritative: {bucket}")));
+    }
+
+    let lifecycle = if metadata.lifecycle_config.is_none() && !metadata.lifecycle_config_xml.is_empty() {
+        return Err(Error::other("persisted bucket lifecycle configuration is invalid"));
+    } else {
+        metadata
+            .lifecycle_config
+            .clone()
+            .filter(|config| !config.rules.is_empty())
+            .map(Arc::new)
+    };
+    if lifecycle.is_none() {
+        return Ok(LifecycleExpiryConfigs {
+            lifecycle: None,
+            object_lock: None,
+            bucket_incarnation_id,
+        });
+    }
+    let object_lock = match metadata_sys::object_lock_config_state_from_authoritative_metadata(&metadata)? {
+        ObjectLockConfigState::Configured { config, .. } => Some(Arc::new(config)),
+        ObjectLockConfigState::ConfirmedAbsent => None,
+        ObjectLockConfigState::Fabricated => {
+            return Err(Error::other(format!("bucket Object Lock metadata is not authoritative: {bucket}")));
+        }
+    };
+
+    Ok(LifecycleExpiryConfigs {
+        lifecycle,
+        object_lock,
+        bucket_incarnation_id,
+    })
+}
 
 pub(crate) async fn get_lifecycle_config(bucket: &str) -> Result<(BucketLifecycleConfiguration, OffsetDateTime)> {
     metadata_sys::get_lifecycle_config(bucket).await
 }
 
-pub(crate) async fn get_object_lock_config(bucket: &str) -> Result<(ObjectLockConfiguration, OffsetDateTime)> {
-    metadata_sys::get_object_lock_config(bucket).await
-}
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::bucket::metadata::BucketMetadata;
+    use crate::bucket::metadata_sys::{self, test_support::isolated_store_over_temp_disks};
+    use crate::storage_api_contracts::bucket::MakeBucketOptions;
+    use s3s::dto::{ExpirationStatus, LifecycleExpiration, LifecycleRule};
+    use serial_test::serial;
 
-pub(crate) async fn get_replication_config(bucket: &str) -> Result<(ReplicationConfiguration, OffsetDateTime)> {
-    metadata_sys::get_replication_config(bucket).await
+    fn lifecycle_config() -> BucketLifecycleConfiguration {
+        BucketLifecycleConfiguration {
+            expiry_updated_at: None,
+            rules: vec![LifecycleRule {
+                status: ExpirationStatus::from_static(ExpirationStatus::ENABLED),
+                expiration: Some(LifecycleExpiration {
+                    days: Some(1),
+                    ..Default::default()
+                }),
+                abort_incomplete_multipart_upload: None,
+                del_marker_expiration: None,
+                filter: None,
+                id: Some("expire".to_string()),
+                noncurrent_version_expiration: None,
+                noncurrent_version_transitions: None,
+                prefix: None,
+                transitions: None,
+            }],
+        }
+    }
+
+    #[tokio::test]
+    #[serial]
+    async fn expiry_configs_are_resolved_from_the_owning_store() {
+        let (_dirs_a, store_a) = isolated_store_over_temp_disks().await;
+        let (_dirs_b, store_b) = isolated_store_over_temp_disks().await;
+        let bucket = "same-name-expiry-config";
+        store_a
+            .peer_sys
+            .make_bucket(bucket, &MakeBucketOptions::default())
+            .await
+            .unwrap();
+        store_b
+            .peer_sys
+            .make_bucket(bucket, &MakeBucketOptions::default())
+            .await
+            .unwrap();
+        metadata_sys::init_bucket_metadata_sys(store_a.clone(), vec![bucket.to_string()]).await;
+        metadata_sys::init_bucket_metadata_sys(store_b.clone(), vec![bucket.to_string()]).await;
+
+        let mut metadata = BucketMetadata::new(bucket);
+        let lifecycle = lifecycle_config();
+        metadata.lifecycle_config_xml = crate::bucket::utils::serialize(&lifecycle).unwrap();
+        metadata.lifecycle_config = Some(lifecycle);
+        metadata_sys::set_new_bucket_metadata_in(&store_a.ctx, metadata)
+            .await
+            .unwrap();
+        metadata_sys::set_new_bucket_metadata_in(&store_b.ctx, BucketMetadata::new(bucket))
+            .await
+            .unwrap();
+
+        assert!(get_expiry_configs(&store_a, bucket).await.unwrap().lifecycle.is_some());
+        assert!(get_expiry_configs(&store_b, bucket).await.unwrap().lifecycle.is_none());
+    }
 }

crates/ecstore/src/bucket/lifecycle/mod.rs

@@ -19,6 +19,7 @@ pub mod core;
 pub mod evaluator;
 pub mod manual_transition_job;
 mod metadata_boundary;
+pub(crate) use metadata_boundary::get_expiry_configs;
 mod object_lock_boundary;
 pub use self::core as lifecycle;
 mod replication_sink;

crates/ecstore/src/bucket/lifecycle/object_lock_boundary.rs

@@ -21,12 +21,12 @@ pub(crate) fn is_object_locked_by_metadata(user_defined: &HashMap<String, String
     rustfs_lifecycle::object_lock::is_object_locked_by_metadata(user_defined, is_delete_marker)
 }
 
-pub(crate) async fn check_object_lock_for_deletion(
-    bucket: &str,
+pub(crate) fn check_object_lock_for_deletion_with_config(
+    config: Option<&s3s::dto::ObjectLockConfiguration>,
     obj_info: &ObjectInfo,
     bypass_governance: bool,
-) -> Option<ObjectLockBlockReason> {
-    objectlock_sys::check_object_lock_for_deletion(bucket, obj_info, bypass_governance).await
+) -> crate::error::Result<Option<ObjectLockBlockReason>> {
+    objectlock_sys::check_object_lock_for_deletion_with_config(config, obj_info, bypass_governance)
 }
 
 #[cfg(test)]

crates/ecstore/src/bucket/lifecycle/replication_sink.rs

@@ -15,15 +15,14 @@
 use rustfs_common::metrics::IlmAction;
 
 use crate::bucket::lifecycle::lifecycle::ObjectOpts;
+pub(crate) use crate::bucket::replication::ReplicationStatusType;
 #[cfg(test)]
-pub(crate) use crate::bucket::replication::ReplicateTargetDecision;
+pub(crate) use crate::bucket::replication::VersionPurgeStatusType;
 pub(crate) use crate::bucket::replication::{
-    ReplicateDecision, ReplicationState, ReplicationStatusType, VersionPurgeStatusType, replication_state_to_filemeta,
-    replication_statuses_map, version_purge_statuses_map,
+    DeleteReplicationConfigSnapshot, ReplicationObjectBridge, replication_state_to_filemeta,
 };
 use crate::bucket::replication::{ReplicationLifecycleBridge, ReplicationLifecycleConfig};
-use crate::object_api::{ObjectInfo, ObjectOptions};
-use crate::storage_api_contracts::object::{DeletedObject, ObjectToDelete};
+use crate::storage_api_contracts::object::DeletedObject;
 
 pub(crate) type LifecycleReplicationConfig = ReplicationLifecycleConfig;
 
@@ -57,15 +56,6 @@ pub(crate) fn lifecycle_action_waits_for_replication(action: IlmAction) -> bool
     )
 }
 
-pub(crate) async fn check_delete_replication(
-    bucket: &str,
-    object: ObjectToDelete,
-    source: &ObjectInfo,
-    opts: &ObjectOptions,
-) -> ReplicateDecision {
-    ReplicationLifecycleBridge::check_delete_replication(bucket, &object, source, opts).await
-}
-
 pub(crate) async fn schedule_delete(bucket: String, delete_object: DeletedObject) {
     ReplicationLifecycleBridge::schedule_delete(bucket, delete_object).await;
 }
@@ -74,7 +64,16 @@ pub(crate) async fn schedule_delete(bucket: String, delete_object: DeletedObject
 mod tests {
     use std::collections::HashMap;
 
+    use crate::bucket::replication::{DeleteReplicationConfigSnapshot, ReplicationObjectBridge};
+    use crate::object_api::{ObjectInfo, ObjectOptions};
+    use crate::storage_api_contracts::object::ObjectToDelete;
     use rustfs_common::metrics::IlmAction;
+    use s3s::dto::{
+        BucketVersioningStatus, DeleteMarkerReplication, DeleteMarkerReplicationStatus, DeleteReplication,
+        DeleteReplicationStatus, Destination, ReplicationConfiguration, ReplicationRule, ReplicationRuleStatus,
+        VersioningConfiguration,
+    };
+    use uuid::Uuid;
 
     use super::*;
 
@@ -139,4 +138,97 @@ mod tests {
         assert!(lifecycle_action_waits_for_replication(IlmAction::TransitionVersionAction));
         assert!(!lifecycle_action_waits_for_replication(IlmAction::NoneAction));
     }
+
+    #[test]
+    fn lifecycle_delete_admission_uses_marker_and_version_switches_for_all_purges() {
+        for marker_enabled in [false, true] {
+            for purge_enabled in [false, true] {
+                let snapshot = DeleteReplicationConfigSnapshot::from_configs_for_test(
+                    VersioningConfiguration {
+                        status: Some(BucketVersioningStatus::from_static(BucketVersioningStatus::ENABLED)),
+                        ..Default::default()
+                    },
+                    Some(ReplicationConfiguration {
+                        role: String::new(),
+                        rules: vec![ReplicationRule {
+                            delete_marker_replication: Some(DeleteMarkerReplication {
+                                status: Some(if marker_enabled {
+                                    DeleteMarkerReplicationStatus::from_static(DeleteMarkerReplicationStatus::ENABLED)
+                                } else {
+                                    DeleteMarkerReplicationStatus::from_static(DeleteMarkerReplicationStatus::DISABLED)
+                                }),
+                            }),
+                            delete_replication: Some(DeleteReplication {
+                                status: if purge_enabled {
+                                    DeleteReplicationStatus::from_static(DeleteReplicationStatus::ENABLED)
+                                } else {
+                                    DeleteReplicationStatus::from_static(DeleteReplicationStatus::DISABLED)
+                                },
+                            }),
+                            destination: Destination {
+                                bucket: "arn:rustfs:replication:target".to_string(),
+                                ..Default::default()
+                            },
+                            existing_object_replication: None,
+                            filter: None,
+                            id: Some("lifecycle-delete-switches".to_string()),
+                            prefix: Some(String::new()),
+                            priority: Some(1),
+                            source_selection_criteria: None,
+                            status: ReplicationRuleStatus::from_static(ReplicationRuleStatus::ENABLED),
+                        }],
+                    }),
+                );
+                let source = ObjectInfo {
+                    bucket: "bucket".to_string(),
+                    name: "logs/object".to_string(),
+                    ..Default::default()
+                };
+                let marker = ObjectToDelete {
+                    object_name: source.name.clone(),
+                    ..Default::default()
+                };
+                let marker_opts = ObjectOptions {
+                    versioned: true,
+                    ..Default::default()
+                };
+                assert_eq!(
+                    ReplicationObjectBridge::check_delete_with_snapshot(&marker, &source, &marker_opts, false, &snapshot)
+                        .replicate_any(),
+                    marker_enabled
+                );
+
+                for delete_marker in [false, true] {
+                    for version_id in [Uuid::new_v4(), Uuid::nil()] {
+                        let purge = ObjectToDelete {
+                            object_name: source.name.clone(),
+                            version_id: Some(version_id),
+                            ..Default::default()
+                        };
+                        let purge_source = ObjectInfo {
+                            delete_marker,
+                            ..source.clone()
+                        };
+                        let purge_opts = ObjectOptions {
+                            version_id: Some(version_id.to_string()),
+                            versioned: true,
+                            ..Default::default()
+                        };
+                        assert_eq!(
+                            ReplicationObjectBridge::check_delete_with_snapshot(
+                                &purge,
+                                &purge_source,
+                                &purge_opts,
+                                false,
+                                &snapshot,
+                            )
+                            .replicate_any(),
+                            purge_enabled,
+                            "delete marker={delete_marker}, version_id={version_id}"
+                        );
+                    }
+                }
+            }
+        }
+    }
 }

crates/ecstore/src/bucket/lifecycle/tier_delete_journal.rs

@@ -20,8 +20,10 @@ use tokio_util::sync::CancellationToken;
 use tracing::{debug, warn};
 
 use crate::bucket::lifecycle::config_boundary;
+use crate::bucket::lifecycle::runtime_boundary;
 use crate::bucket::lifecycle::tier_sweeper::{
-    Jentry, delete_confirmed_transition_candidate_exact_with_manager_and_identity,
+    Jentry, TierDeleteJournalState, TierDeleteSourceIdentity,
+    delete_confirmed_transition_candidate_exact_with_manager_and_identity,
     delete_object_from_remote_tier_idempotent_with_manager_and_identity,
 };
 use crate::disk::RUSTFS_META_BUCKET;
@@ -30,7 +32,7 @@ use crate::object_api::{GetObjectReader, ObjectInfo, ObjectOptions, PutObjReader
 use crate::services::tier::tier::tier_destination_id_from_metadata;
 use crate::storage_api_contracts::{
     list::ListOperations as _,
-    object::{DeletedObject, ObjectIO, ObjectOperations, ObjectToDelete},
+    object::{DeletedObject, HTTPPreconditions, ObjectIO, ObjectOperations, ObjectToDelete},
     range::HTTPRangeSpec,
 };
 use crate::store::ECStore;
@@ -46,6 +48,7 @@ const TIER_DELETE_JOURNAL_RECOVERY_TIMEOUT: Duration = Duration::from_secs(300);
 const TIER_DELETE_JOURNAL_VERSION: u8 = 2;
 const TIER_DELETE_JOURNAL_EXACT_VERSION: u8 = 3;
 const TIER_DELETE_JOURNAL_STATE_VERSION: u8 = 4;
+const TIER_DELETE_JOURNAL_TRANSACTION_VERSION: u8 = 5;
 pub(crate) const TIER_DELETE_JOURNAL_PREFIX: &str = "ilm/tier-delete-journal/";
 
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
@@ -61,13 +64,22 @@ struct PersistedTierDeleteJournalEntry {
     version_id_exact: Option<bool>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     version_state: Option<rustfs_filemeta::TransitionVersionState>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    state: Option<TierDeleteJournalState>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    source: Option<TierDeleteSourceIdentity>,
 }
 
 impl PersistedTierDeleteJournalEntry {
     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;
-        let version = if legacy_unknown {
+        let version = if je.source.is_some() || je.state == TierDeleteJournalState::Prepared {
+            if je.backend_identity.is_none() {
+                return Err(Error::other("tier delete transaction is missing its backend identity"));
+            }
+            TIER_DELETE_JOURNAL_TRANSACTION_VERSION
+        } else if legacy_unknown {
             if je.backend_identity.is_some() {
                 TIER_DELETE_JOURNAL_VERSION
             } else {
@@ -87,6 +99,10 @@ impl PersistedTierDeleteJournalEntry {
             backend_identity: je.backend_identity,
             version_id_exact: je.version_id_exact.then_some(true),
             version_state: (!legacy_unknown).then_some(je.version_state),
+            state: (version == TIER_DELETE_JOURNAL_TRANSACTION_VERSION).then_some(je.state),
+            source: (version == TIER_DELETE_JOURNAL_TRANSACTION_VERSION)
+                .then(|| je.source.clone())
+                .flatten(),
         })
     }
 
@@ -101,14 +117,21 @@ impl PersistedTierDeleteJournalEntry {
         }
         if self.version != TIER_DELETE_JOURNAL_EXACT_VERSION
             && self.version != TIER_DELETE_JOURNAL_STATE_VERSION
+            && self.version != TIER_DELETE_JOURNAL_TRANSACTION_VERSION
             && self.version_id_exact.unwrap_or(false)
         {
             return Err(Error::other(
                 "legacy tier delete journal entry has an unsupported exact version constraint",
             ));
         }
-        let (backend_identity, version_id_exact, version_state) = match self.version {
-            1 => (None, false, rustfs_filemeta::TransitionVersionState::Unknown),
+        let (backend_identity, version_id_exact, version_state, state, source) = match self.version {
+            1 => (
+                None,
+                false,
+                rustfs_filemeta::TransitionVersionState::Unknown,
+                TierDeleteJournalState::Committed,
+                None,
+            ),
             TIER_DELETE_JOURNAL_VERSION => (
                 Some(
                     self.backend_identity
@@ -116,6 +139,8 @@ impl PersistedTierDeleteJournalEntry {
                 ),
                 false,
                 rustfs_filemeta::TransitionVersionState::Unknown,
+                TierDeleteJournalState::Committed,
+                None,
             ),
             TIER_DELETE_JOURNAL_EXACT_VERSION => {
                 if self.version_id.is_empty() || self.version_id_exact != Some(true) {
@@ -128,6 +153,8 @@ impl PersistedTierDeleteJournalEntry {
                     ),
                     true,
                     rustfs_filemeta::TransitionVersionState::Exact,
+                    TierDeleteJournalState::Committed,
+                    None,
                 )
             }
             TIER_DELETE_JOURNAL_STATE_VERSION => {
@@ -143,6 +170,31 @@ impl PersistedTierDeleteJournalEntry {
                     ),
                     exact,
                     state,
+                    TierDeleteJournalState::Committed,
+                    None,
+                )
+            }
+            TIER_DELETE_JOURNAL_TRANSACTION_VERSION => {
+                let state = self
+                    .state
+                    .ok_or_else(|| Error::other("tier delete journal v5 entry is missing its state"))?;
+                let source = self
+                    .source
+                    .ok_or_else(|| Error::other("tier delete journal v5 entry is missing its source identity"))?;
+                let exact = self.version_id_exact.unwrap_or(false);
+                let version_state = self
+                    .version_state
+                    .ok_or_else(|| Error::other("tier delete journal v5 entry is missing its version state"))?;
+                validate_version_state(version_state, &self.version_id, exact)?;
+                (
+                    Some(
+                        self.backend_identity
+                            .ok_or_else(|| Error::other("tier delete journal v5 entry is missing its backend identity"))?,
+                    ),
+                    exact,
+                    version_state,
+                    state,
+                    Some(source),
                 )
             }
             version => return Err(Error::other(format!("unsupported tier delete journal version {version}"))),
@@ -154,6 +206,8 @@ impl PersistedTierDeleteJournalEntry {
             backend_identity,
             version_id_exact,
             version_state,
+            state,
+            source,
         })
     }
 }
@@ -201,6 +255,20 @@ pub(crate) fn tier_delete_journal_object_name(je: &Jentry) -> String {
         hasher.update([0]);
         hasher.update(b"exact-version-id");
     }
+    if let Some(source) = &je.source {
+        hasher.update([0]);
+        hasher.update(source.bucket.as_bytes());
+        hasher.update([0]);
+        hasher.update(source.object.as_bytes());
+        hasher.update([0]);
+        hasher.update(source.version_id.as_deref().unwrap_or_default().as_bytes());
+        hasher.update([0]);
+        hasher.update(source.data_dir.as_deref().unwrap_or_default().as_bytes());
+        hasher.update([0]);
+        hasher.update(source.etag.as_deref().unwrap_or_default().as_bytes());
+        hasher.update([0]);
+        hasher.update(source.mod_time.as_deref().unwrap_or_default().as_bytes());
+    }
     format!(
         "{TIER_DELETE_JOURNAL_PREFIX}{}.json",
         rustfs_utils::crypto::hex(hasher.finalize().as_slice())
@@ -246,6 +314,66 @@ where
         .map_err(std::io::Error::other)
 }
 
+pub async fn commit_tier_delete_journal_entry<S>(api: Arc<S>, je: &Jentry) -> std::io::Result<()>
+where
+    S: ObjectIO<
+            Error = Error,
+            RangeSpec = HTTPRangeSpec,
+            HeaderMap = http::HeaderMap,
+            ObjectOptions = ObjectOptions,
+            ObjectInfo = ObjectInfo,
+            GetObjectReader = GetObjectReader,
+            PutObjectReader = PutObjReader,
+        >,
+{
+    let mut committed = je.clone();
+    committed.state = TierDeleteJournalState::Committed;
+    persist_tier_delete_journal_entry(api, &committed).await
+}
+
+pub async fn abort_tier_delete_journal_entry<S>(api: Arc<S>, je: &Jentry) -> std::io::Result<()>
+where
+    S: ObjectOperations<
+            Error = Error,
+            ObjectInfo = ObjectInfo,
+            ObjectOptions = ObjectOptions,
+            FileInfo = FileInfo,
+            ObjectToDelete = ObjectToDelete,
+            DeletedObject = DeletedObject,
+        >,
+{
+    remove_tier_delete_journal_entry(api, je).await
+}
+
+pub async fn abort_prepared_tier_delete_journal_entry(api: Arc<ECStore>, je: &Jentry) -> std::io::Result<()> {
+    let name = tier_delete_journal_object_name(je);
+    let (data, metadata) = match config_boundary::read_config_with_metadata(api.clone(), &name, &ObjectOptions::default()).await {
+        Ok(result) => result,
+        Err(Error::ConfigNotFound) | Err(Error::FileNotFound) => return Ok(()),
+        Err(err) => return Err(std::io::Error::other(err)),
+    };
+    let current = decode_tier_delete_journal_entry(&data).map_err(std::io::Error::other)?;
+    if current.state != TierDeleteJournalState::Prepared {
+        return Ok(());
+    }
+    let etag = metadata
+        .etag
+        .ok_or_else(|| std::io::Error::other("prepared tier delete journal has no entity tag"))?;
+    match config_boundary::delete_config_if_match(api, &name, &etag).await {
+        Ok(()) | Err(Error::ConfigNotFound) => Ok(()),
+        Err(Error::PreconditionFailed) => Err(std::io::Error::new(
+            std::io::ErrorKind::WouldBlock,
+            "prepared tier delete journal changed before abort",
+        )),
+        Err(err) => Err(std::io::Error::other(err)),
+    }
+}
+
+pub(crate) async fn enqueue_committed_tier_delete_journal_entry(je: &Jentry) -> std::io::Result<()> {
+    let expiry_state = runtime_boundary::expiry_state_handle();
+    expiry_state.write().await.enqueue_tier_journal_entry(je)
+}
+
 pub async fn remove_tier_delete_journal_entry<S>(api: Arc<S>, je: &Jentry) -> std::io::Result<()>
 where
     S: ObjectOperations<
@@ -264,6 +392,13 @@ where
 }
 
 pub async fn process_tier_delete_journal_entry(api: Arc<ECStore>, je: &Jentry) -> std::io::Result<()> {
+    if je.state == TierDeleteJournalState::Prepared {
+        return reconcile_prepared_tier_delete_journal_entry(api, je).await;
+    }
+    process_committed_tier_delete_journal_entry(api, je).await
+}
+
+async fn process_committed_tier_delete_journal_entry(api: Arc<ECStore>, je: &Jentry) -> std::io::Result<()> {
     if je.version_state == rustfs_filemeta::TransitionVersionState::Unknown {
         return Err(std::io::Error::new(
             std::io::ErrorKind::InvalidData,
@@ -296,6 +431,87 @@ pub async fn process_tier_delete_journal_entry(api: Arc<ECStore>, je: &Jentry) -
     remove_tier_delete_journal_entry(api, je).await
 }
 
+async fn reconcile_prepared_tier_delete_journal_entry(api: Arc<ECStore>, je: &Jentry) -> std::io::Result<()> {
+    let (data, metadata) =
+        config_boundary::read_config_with_metadata(api.clone(), &tier_delete_journal_object_name(je), &ObjectOptions::default())
+            .await
+            .map_err(std::io::Error::other)?;
+    let current = decode_tier_delete_journal_entry(&data).map_err(std::io::Error::other)?;
+    if current.state != TierDeleteJournalState::Prepared {
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::WouldBlock,
+            "prepared tier delete journal changed before reconciliation",
+        ));
+    }
+    let Some(etag) = metadata.etag else {
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::InvalidData,
+            "prepared tier delete journal has no entity tag",
+        ));
+    };
+    let source = je
+        .source
+        .as_ref()
+        .ok_or_else(|| std::io::Error::new(std::io::ErrorKind::InvalidData, "prepared tier delete journal has no source"))?;
+    match api
+        .get_object_info(&source.bucket, &source.object, &source.lookup_options())
+        .await
+    {
+        Ok(info) if source.matches(&info) => {
+            match config_boundary::delete_config_if_match(api, &tier_delete_journal_object_name(&current), &etag).await {
+                Ok(()) => Ok(()),
+                Err(Error::PreconditionFailed) => Err(std::io::Error::new(
+                    std::io::ErrorKind::WouldBlock,
+                    "prepared tier delete journal changed before abort",
+                )),
+                Err(err) => Err(std::io::Error::other(err)),
+            }
+        }
+        Ok(_info) if source.has_stable_identity() => {
+            commit_prepared_tier_delete_journal_entry_if_current(api, current, etag).await
+        }
+        Ok(_) => Err(std::io::Error::new(
+            std::io::ErrorKind::WouldBlock,
+            "prepared tier delete journal source identity is not sufficient to confirm deletion",
+        )),
+        Err(Error::ObjectNotFound(_, _)) | Err(Error::FileNotFound) | Err(Error::FileVersionNotFound) => {
+            commit_prepared_tier_delete_journal_entry_if_current(api, current, etag).await
+        }
+        Err(err) => Err(std::io::Error::other(err)),
+    }
+}
+
+async fn commit_prepared_tier_delete_journal_entry_if_current(
+    api: Arc<ECStore>,
+    mut committed: Jentry,
+    etag: String,
+) -> std::io::Result<()> {
+    committed.state = TierDeleteJournalState::Committed;
+    let data = encode_tier_delete_journal_entry(&committed).map_err(std::io::Error::other)?;
+    match config_boundary::save_config_with_opts(
+        api.clone(),
+        &tier_delete_journal_object_name(&committed),
+        data,
+        &ObjectOptions {
+            max_parity: true,
+            http_preconditions: Some(HTTPPreconditions {
+                if_match: Some(etag),
+                ..Default::default()
+            }),
+            ..Default::default()
+        },
+    )
+    .await
+    {
+        Ok(()) => process_committed_tier_delete_journal_entry(api, &committed).await,
+        Err(Error::PreconditionFailed) => Err(std::io::Error::new(
+            std::io::ErrorKind::WouldBlock,
+            "prepared tier delete journal changed before commit",
+        )),
+        Err(err) => Err(std::io::Error::other(err)),
+    }
+}
+
 pub async fn recover_tier_delete_journal_entries(
     api: Arc<ECStore>,
     limit: usize,
@@ -482,10 +698,13 @@ mod tests {
         decode_tier_delete_journal_entry, encode_tier_delete_journal_entry, record_tier_delete_journal_backend_identity,
         tier_delete_journal_object_name,
     };
-    use crate::bucket::lifecycle::tier_sweeper::Jentry;
+    use crate::bucket::lifecycle::tier_sweeper::{Jentry, TierDeleteJournalState, TierDeleteSourceIdentity};
     use crate::error::Result;
+    use crate::object_api::ObjectInfo;
     use std::time::Duration;
+    use time::OffsetDateTime;
     use tokio_util::sync::CancellationToken;
+    use uuid::Uuid;
 
     fn journal_entry() -> Jentry {
         Jentry {
@@ -495,6 +714,8 @@ mod tests {
             backend_identity: Some([7; 32]),
             version_id_exact: true,
             version_state: rustfs_filemeta::TransitionVersionState::Exact,
+            state: TierDeleteJournalState::Committed,
+            source: None,
         }
     }
 
@@ -513,6 +734,55 @@ mod tests {
         assert_eq!(decoded.version_state, je.version_state);
     }
 
+    #[test]
+    fn tier_delete_transaction_roundtrips_prepared_source_identity() {
+        let mut je = journal_entry();
+        je.state = TierDeleteJournalState::Prepared;
+        je.source = Some(TierDeleteSourceIdentity {
+            bucket: "bucket".to_string(),
+            object: "object".to_string(),
+            version_id: Some("version".to_string()),
+            versioned: true,
+            version_suspended: false,
+            data_dir: Some("data-dir".to_string()),
+            etag: Some("etag".to_string()),
+            mod_time: Some("mod-time".to_string()),
+        });
+
+        let encoded = encode_tier_delete_journal_entry(&je).expect("prepared transaction should encode");
+        let value: serde_json::Value = serde_json::from_slice(&encoded).expect("transaction should be JSON");
+        assert_eq!(value["version"], serde_json::json!(5));
+        assert_eq!(value["state"], serde_json::json!("Prepared"));
+        assert!(value["source"].is_object());
+
+        let decoded = decode_tier_delete_journal_entry(&encoded).expect("prepared transaction should decode");
+        assert_eq!(decoded.state, TierDeleteJournalState::Prepared);
+        assert_eq!(decoded.source, je.source);
+    }
+
+    #[test]
+    fn tier_delete_source_identity_rejects_recreated_object() {
+        let version_id = Uuid::from_u128(1);
+        let data_dir = Uuid::from_u128(2);
+        let mod_time = OffsetDateTime::UNIX_EPOCH + time::Duration::seconds(1);
+        let info = ObjectInfo {
+            bucket: "bucket".to_string(),
+            name: "object".to_string(),
+            version_id: Some(version_id),
+            data_dir: Some(data_dir),
+            mod_time: Some(mod_time),
+            ..Default::default()
+        };
+        let source = TierDeleteSourceIdentity::from_object_info("bucket", "object", &info, true, false);
+        assert!(source.matches(&info));
+
+        let recreated = ObjectInfo {
+            data_dir: Some(Uuid::from_u128(3)),
+            ..info
+        };
+        assert!(!source.matches(&recreated));
+    }
+
     #[test]
     fn tier_delete_journal_roundtrips_exact_put_response_constraint() {
         let mut exact = journal_entry();

crates/ecstore/src/bucket/lifecycle/tier_sweeper.rs

@@ -23,10 +23,12 @@ use crate::bucket::lifecycle::bucket_lifecycle_ops::ExpiryOp;
 use crate::bucket::lifecycle::lifecycle::{self, ObjectOpts};
 use crate::bucket::lifecycle::tier_delete_journal::persist_tier_delete_journal_entry;
 use crate::client::signer_error::error_chain_contains_signer_header_marker;
+use crate::object_api::ObjectInfo;
 use crate::services::tier::tier::{TierConfigMgr, TierDestinationId, TierOperationLease};
 use crate::storage_api_contracts::lifecycle::TransitionedObject;
 use crate::store::ECStore;
 use rustfs_utils::get_env_usize;
+use serde::{Deserialize, Serialize};
 use sha2::{Digest, Sha256};
 use std::any::Any;
 use std::collections::VecDeque;
@@ -257,6 +259,8 @@ impl ObjSweeper {
                     rustfs_filemeta::TransitionVersionState::SuspendedNull | rustfs_filemeta::TransitionVersionState::Exact
                 ),
                 version_state: self.transition_version_state,
+                state: TierDeleteJournalState::Committed,
+                source: None,
             });
         }
         None
@@ -285,6 +289,76 @@ impl ObjSweeper {
     }
 }
 
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
+pub(crate) enum TierDeleteJournalState {
+    Prepared,
+    Committed,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(deny_unknown_fields)]
+pub(crate) struct TierDeleteSourceIdentity {
+    pub(crate) bucket: String,
+    pub(crate) object: String,
+    pub(crate) version_id: Option<String>,
+    pub(crate) versioned: bool,
+    pub(crate) version_suspended: bool,
+    pub(crate) data_dir: Option<String>,
+    pub(crate) etag: Option<String>,
+    pub(crate) mod_time: Option<String>,
+}
+
+impl TierDeleteSourceIdentity {
+    pub(crate) fn from_object_info(
+        bucket: &str,
+        object: &str,
+        info: &ObjectInfo,
+        versioned: bool,
+        version_suspended: bool,
+    ) -> Self {
+        Self {
+            bucket: bucket.to_string(),
+            object: object.to_string(),
+            version_id: info.version_id.map(|id| id.to_string()),
+            versioned,
+            version_suspended,
+            data_dir: info.data_dir.map(|id| id.to_string()),
+            etag: info.etag.clone(),
+            mod_time: info.mod_time.map(|time| time.to_string()),
+        }
+    }
+
+    pub(crate) fn lookup_options(&self) -> crate::object_api::ObjectOptions {
+        crate::object_api::ObjectOptions {
+            version_id: self.version_id.clone(),
+            versioned: self.versioned,
+            version_suspended: self.version_suspended,
+            ..Default::default()
+        }
+    }
+
+    pub(crate) fn matches(&self, info: &ObjectInfo) -> bool {
+        if self.bucket != info.bucket {
+            return false;
+        }
+        if let Some(version_id) = &self.version_id {
+            return info.version_id.map(|id| id.to_string()).as_deref() == Some(version_id.as_str())
+                && self.data_dir == info.data_dir.map(|id| id.to_string());
+        }
+        if self.data_dir.is_some() {
+            return self.data_dir == info.data_dir.map(|id| id.to_string());
+        }
+        self.etag.is_some()
+            && self.etag == info.etag
+            && self.mod_time.is_some()
+            && self.mod_time == info.mod_time.map(|time| time.to_string())
+    }
+
+    pub(crate) fn has_stable_identity(&self) -> bool {
+        self.version_id.is_some() || self.data_dir.is_some() || (self.etag.is_some() && self.mod_time.is_some())
+    }
+}
+
 #[derive(Debug, Clone)]
 #[allow(unused_assignments)]
 pub struct Jentry {
@@ -294,6 +368,8 @@ pub struct Jentry {
     pub(crate) backend_identity: Option<TierDestinationId>,
     pub(crate) version_id_exact: bool,
     pub(crate) version_state: rustfs_filemeta::TransitionVersionState,
+    pub(crate) state: TierDeleteJournalState,
+    pub(crate) source: Option<TierDeleteSourceIdentity>,
 }
 
 impl ExpiryOp for Jentry {
@@ -554,9 +630,48 @@ pub fn transitioned_force_delete_journal_entry(
             rustfs_filemeta::TransitionVersionState::SuspendedNull | rustfs_filemeta::TransitionVersionState::Exact
         ),
         version_state: transition_version_state,
+        state: TierDeleteJournalState::Committed,
+        source: None,
     })
 }
 
+pub(crate) fn attach_tier_delete_source(
+    je: &mut Jentry,
+    bucket: &str,
+    object: &str,
+    info: &ObjectInfo,
+    versioned: bool,
+    version_suspended: bool,
+) {
+    je.state = TierDeleteJournalState::Prepared;
+    je.source = Some(TierDeleteSourceIdentity::from_object_info(
+        bucket,
+        object,
+        info,
+        versioned,
+        version_suspended,
+    ));
+}
+
+pub(crate) fn transitioned_delete_journal_entry_for_source(
+    version_id: Option<Uuid>,
+    versioned: bool,
+    suspended: bool,
+    bucket: &str,
+    object: &str,
+    source: &ObjectInfo,
+) -> Option<Jentry> {
+    let mut je = transitioned_delete_journal_entry(
+        version_id,
+        versioned,
+        suspended,
+        &source.transitioned_object,
+        source.transition_version_state,
+    )?;
+    attach_tier_delete_source(&mut je, bucket, object, source, versioned, suspended);
+    Some(je)
+}
+
 #[cfg(test)]
 mod test {
     use crate::client::signer_error::invalid_utf8_header_error;

crates/ecstore/src/bucket/metadata.rs

@@ -18,7 +18,7 @@ use super::versioning::VersioningApi;
 use super::{quota::BucketQuota, target::BucketTargets};
 use crate::bucket::replication::invalid_replication_config_status_field;
 use crate::bucket::utils::deserialize;
-use crate::config::com::{read_config, save_config};
+use crate::config::com::{read_config, read_config_preserve_empty, save_config};
 use crate::disk::BUCKET_META_PREFIX;
 use crate::error::{Error, Result};
 use crate::runtime::sources as runtime_sources;
@@ -37,6 +37,7 @@ use std::io::{Read, Write};
 use std::sync::Arc;
 use time::{Date, OffsetDateTime, PrimitiveDateTime, Time as CivilTime, UtcOffset};
 use tracing::error;
+use uuid::Uuid;
 
 fn read_msgp_str<R: Read>(rd: &mut R) -> Result<String> {
     let len = rmp::decode::read_str_len(rd)? as usize;
@@ -226,6 +227,7 @@ fn write_bin_field<W: Write>(wr: &mut W, key: &str, val: &[u8]) -> Result<()> {
 }
 
 pub const BUCKET_METADATA_FILE: &str = ".metadata.bin";
+pub const BUCKET_INCARNATION_FILE: &str = ".bucket-incarnation";
 pub const BUCKET_METADATA_FORMAT: u16 = 1;
 pub const BUCKET_METADATA_VERSION: u16 = 1;
 
@@ -277,6 +279,8 @@ pub struct BucketMetadata {
     pub name: String,
     pub created: OffsetDateTime,
     pub lock_enabled: bool, // While marked as unused, it may need to be retained
+    pub bucket_incarnation_id: Uuid,
+    pub(crate) bucket_incarnation_sidecar: bool,
     pub policy_config_json: Vec<u8>,
     pub notification_config_xml: Vec<u8>,
     pub lifecycle_config_xml: Vec<u8>,
@@ -347,6 +351,8 @@ impl Default for BucketMetadata {
             name: Default::default(),
             created: OffsetDateTime::UNIX_EPOCH,
             lock_enabled: Default::default(),
+            bucket_incarnation_id: Uuid::nil(),
+            bucket_incarnation_sidecar: false,
             policy_config_json: Default::default(),
             notification_config_xml: Default::default(),
             lifecycle_config_xml: Default::default(),
@@ -414,6 +420,7 @@ impl BucketMetadata {
     pub fn new(name: &str) -> Self {
         BucketMetadata {
             name: name.to_string(),
+            bucket_incarnation_id: Uuid::new_v4(),
             ..Default::default()
         }
     }
@@ -479,6 +486,11 @@ impl BucketMetadata {
                 "Name" => self.name = read_msgp_str(rd)?,
                 "Created" => self.created = read_msgp_time_value(rd)?,
                 "LockEnabled" => self.lock_enabled = read_msgp_bool(rd)?,
+                "BucketIncarnationID" => {
+                    let bytes = read_msgp_bin(rd)?;
+                    self.bucket_incarnation_id =
+                        Uuid::from_slice(&bytes).map_err(|err| Error::other(format!("invalid BucketIncarnationID: {err}")))?;
+                }
                 "PolicyConfigJSON" | "PolicyConfigJson" => self.policy_config_json = read_msgp_bin(rd)?,
                 "NotificationConfigXML" | "NotificationConfigXml" => self.notification_config_xml = read_msgp_bin(rd)?,
                 "LifecycleConfigXML" | "LifecycleConfigXml" => self.lifecycle_config_xml = read_msgp_bin(rd)?,
@@ -535,8 +547,8 @@ impl BucketMetadata {
 
     /// Encode to msgp bytes. Field order follows MinIO BucketMetadata for compatibility.
     pub fn encode_to<W: Write>(&self, wr: &mut W) -> Result<()> {
-        // Map size: MinIO fields (25) + RustFS extensions (18)
-        let map_len: u32 = 43;
+        // Map size: MinIO fields (25) + RustFS extensions (19)
+        let map_len: u32 = 44;
         rmp::encode::write_map_len(wr, map_len)?;
 
         // MinIO field order (same as Go struct)
@@ -549,6 +561,8 @@ impl BucketMetadata {
         rmp::encode::write_str(wr, "LockEnabled")?;
         rmp::encode::write_bool(wr, self.lock_enabled)?;
 
+        write_bin_field(wr, "BucketIncarnationID", self.bucket_incarnation_id.as_bytes())?;
+
         write_bin_field(wr, "PolicyConfigJSON", &self.policy_config_json)?;
         write_bin_field(wr, "NotificationConfigXML", &self.notification_config_xml)?;
         write_bin_field(wr, "LifecycleConfigXML", &self.lifecycle_config_xml)?;
@@ -748,6 +762,10 @@ impl BucketMetadata {
                 self.quota_config_updated_at = updated;
             }
             OBJECT_LOCK_CONFIG => {
+                self.object_lock_config = None;
+                if !data.is_empty() {
+                    self.lock_enabled = true;
+                }
                 self.object_lock_config_xml = data;
                 self.object_lock_config_updated_at = updated;
             }
@@ -1115,6 +1133,29 @@ impl BucketMetadata {
     }
 }
 
+pub(crate) async fn load_bucket_incarnation(api: Arc<ECStore>, bucket: &str) -> Result<Option<Uuid>> {
+    let path = format!("{BUCKET_META_PREFIX}/{bucket}/{BUCKET_INCARNATION_FILE}");
+    let data = match read_config_preserve_empty(api, &path).await {
+        Ok(data) => data,
+        Err(Error::ConfigNotFound) => return Ok(None),
+        Err(err) => return Err(err),
+    };
+    let incarnation =
+        Uuid::from_slice(&data).map_err(|err| Error::other(format!("persisted bucket incarnation is invalid: {err}")))?;
+    if incarnation.is_nil() {
+        return Err(Error::other("persisted bucket incarnation is nil"));
+    }
+    Ok(Some(incarnation))
+}
+
+pub(crate) async fn save_bucket_incarnation(api: Arc<ECStore>, bucket: &str, incarnation: Uuid) -> Result<()> {
+    if incarnation.is_nil() {
+        return Err(Error::other("cannot persist a nil bucket incarnation"));
+    }
+    let path = format!("{BUCKET_META_PREFIX}/{bucket}/{BUCKET_INCARNATION_FILE}");
+    save_config(api, &path, incarnation.as_bytes().to_vec()).await
+}
+
 pub async fn load_bucket_metadata(api: Arc<ECStore>, bucket: &str) -> Result<BucketMetadata> {
     load_bucket_metadata_parse(api, bucket, true).await
 }
@@ -1142,6 +1183,23 @@ pub(crate) async fn load_bucket_metadata_parse_with_presence(
         }
     };
 
+    let incarnation = load_bucket_incarnation(api, bucket).await?;
+    if persisted {
+        if let Some(incarnation) = incarnation {
+            if !bm.bucket_incarnation_id.is_nil() && bm.bucket_incarnation_id != incarnation {
+                return Err(Error::other("bucket incarnation sidecar does not match bucket metadata"));
+            }
+            bm.bucket_incarnation_id = incarnation;
+            bm.bucket_incarnation_sidecar = true;
+        } else if !bm.bucket_incarnation_id.is_nil() {
+            return Err(Error::other(format!(
+                "bucket incarnation sidecar is missing for new-format metadata: {bucket}"
+            )));
+        }
+    } else if incarnation.is_some() {
+        return Err(Error::other("bucket incarnation sidecar exists without bucket metadata"));
+    }
+
     bm.default_timestamps();
 
     if parse {
@@ -1209,6 +1267,10 @@ mod test {
         // Same 4-byte format|version header (1|1) and msgpack layout as MinIO.
         BucketMetadata::check_header(&blob).expect("valid .metadata.bin header");
         let mut bm = BucketMetadata::unmarshal(&blob[4..]).expect("unmarshal MinIO bucket metadata");
+        assert!(
+            bm.bucket_incarnation_id.is_nil(),
+            "legacy MinIO metadata has no RustFS bucket incarnation field"
+        );
 
         // Raw config fields survive the msgpack decode (PascalCase MinIO field names).
         assert_eq!(bm.name, "interop");
@@ -1291,6 +1353,42 @@ mod test {
         let new = BucketMetadata::unmarshal(&buf).unwrap();
 
         assert_eq!(bm.name, new.name);
+        assert!(!bm.bucket_incarnation_id.is_nil());
+        assert_eq!(bm.bucket_incarnation_id, new.bucket_incarnation_id);
+    }
+
+    #[test]
+    fn bucket_incarnation_msgpack_rejects_invalid_binary_length() {
+        let mut fixture = Vec::new();
+        rmp::encode::write_map_len(&mut fixture, 1).unwrap();
+        rmp::encode::write_str(&mut fixture, "BucketIncarnationID").unwrap();
+        rmp::encode::write_bin(&mut fixture, &[0_u8; 15]).unwrap();
+
+        let err = BucketMetadata::unmarshal(&fixture).expect_err("non-UUID incarnation bytes must fail closed");
+        assert!(err.to_string().contains("invalid BucketIncarnationID"));
+    }
+
+    #[test]
+    fn same_name_bucket_metadata_gets_a_new_incarnation() {
+        let old = BucketMetadata::new("recreated");
+        let new = BucketMetadata::new("recreated");
+
+        assert!(!old.bucket_incarnation_id.is_nil());
+        assert!(!new.bucket_incarnation_id.is_nil());
+        assert_ne!(old.bucket_incarnation_id, new.bucket_incarnation_id);
+    }
+
+    #[test]
+    fn site_replication_config_updates_cannot_replace_bucket_incarnation() {
+        let mut metadata = BucketMetadata::new("site-replication-update");
+        let incarnation = metadata.bucket_incarnation_id;
+
+        metadata
+            .update_config(BUCKET_POLICY_CONFIG, br#"{"Version":"2012-10-17","Statement":[]}"#.to_vec())
+            .unwrap();
+        metadata.update_config(OBJECT_LOCK_CONFIG, Vec::new()).unwrap();
+
+        assert_eq!(metadata.bucket_incarnation_id, incarnation);
     }
 
     #[test]

crates/ecstore/src/bucket/object_lock/objectlock_sys.rs

@@ -12,10 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::bucket::metadata_sys::get_object_lock_config;
+use crate::bucket::metadata_sys::{ObjectLockConfigState, get_object_lock_config, get_object_lock_config_state};
 use crate::bucket::object_lock::objectlock;
+use crate::error::{Error, Result, StorageError};
 use crate::object_api::ObjectInfo;
-use s3s::dto::{DefaultRetention, ObjectLockLegalHoldStatus, ObjectLockRetentionMode};
+use s3s::dto::{Date, DefaultRetention, ObjectLockConfiguration, ObjectLockLegalHoldStatus, ObjectLockRetentionMode};
+use s3s::header::{X_AMZ_OBJECT_LOCK_LEGAL_HOLD, X_AMZ_OBJECT_LOCK_MODE, X_AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE};
 use std::sync::Arc;
 use time::OffsetDateTime;
 
@@ -37,6 +39,20 @@ impl BucketObjectLockSys {
     }
 }
 
+pub(crate) fn ensure_recursive_force_delete_allowed_for_state(bucket: &str, state: &ObjectLockConfigState) -> Result<()> {
+    match state {
+        ObjectLockConfigState::ConfirmedAbsent => Ok(()),
+        ObjectLockConfigState::Configured { .. } => Err(StorageError::InvalidArgument(
+            bucket.to_string(),
+            String::new(),
+            "force-delete is forbidden on Object Locking enabled buckets".to_string(),
+        )),
+        ObjectLockConfigState::Fabricated => {
+            Err(Error::other(format!("bucket Object Lock metadata is not authoritative: {bucket}")))
+        }
+    }
+}
+
 /// Check if a retention period is still active based on mode and retain_until_date
 pub fn is_retention_active(mode: &str, retain_until_date: Option<&s3s::dto::Date>) -> bool {
     if mode != ObjectLockRetentionMode::COMPLIANCE && mode != ObjectLockRetentionMode::GOVERNANCE {
@@ -205,71 +221,122 @@ fn check_retention_blocks_deletion(
     None
 }
 
+/// Check an object's lock metadata using an already resolved bucket Object
+/// Lock configuration. `None` means the configuration is confirmed absent.
+///
 /// # S3 Standard Behavior
 /// - COMPLIANCE mode: Cannot be deleted even with bypass header
 /// - GOVERNANCE mode: Can be deleted if bypass_governance is true (caller must verify s3:BypassGovernanceRetention permission)
 /// - Legal Hold: Cannot be bypassed regardless of mode
-pub async fn check_object_lock_for_deletion(
-    bucket: &str,
+pub(crate) fn check_object_lock_for_deletion_with_config(
+    config: Option<&ObjectLockConfiguration>,
     obj_info: &ObjectInfo,
     bypass_governance: bool,
-) -> Option<ObjectLockBlockReason> {
+) -> Result<Option<ObjectLockBlockReason>> {
     if obj_info.delete_marker {
-        return None;
+        return Ok(None);
     }
 
-    // 1. Check legal hold - cannot be bypassed (reuse has_legal_hold)
-    if has_legal_hold(&obj_info.user_defined) {
-        return Some(ObjectLockBlockReason::LegalHold);
-    }
-
-    // 2. Check explicit retention
-    let explicit_ret = objectlock::get_object_retention_meta(&obj_info.user_defined);
-    if let Some(mode) = &explicit_ret.mode {
-        let mode_str = mode.as_str();
-        if is_retention_active(mode_str, explicit_ret.retain_until_date.as_ref())
-            && let Some(reason) = check_retention_blocks_deletion(
-                mode_str,
-                explicit_ret.retain_until_date.map(OffsetDateTime::from),
-                bypass_governance,
-            )
-        {
-            return Some(reason);
+    if let Some(status) = obj_info.user_defined.get(X_AMZ_OBJECT_LOCK_LEGAL_HOLD.as_str()) {
+        if status.eq_ignore_ascii_case(ObjectLockLegalHoldStatus::ON) {
+            return Ok(Some(ObjectLockBlockReason::LegalHold));
+        }
+        if !status.eq_ignore_ascii_case(ObjectLockLegalHoldStatus::OFF) {
+            return Err(Error::other("persisted object legal-hold metadata is invalid"));
         }
     }
 
-    // 3. Check default retention only if no explicit retention is set
-    if explicit_ret.mode.is_none()
-        && let Some(default_retention) = BucketObjectLockSys::get(bucket).await
+    let mode = obj_info.user_defined.get(X_AMZ_OBJECT_LOCK_MODE.as_str());
+    let retain_until = obj_info.user_defined.get(X_AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE.as_str());
+    let explicit_ret = match (mode, retain_until) {
+        (None, None) => None,
+        (Some(mode), Some(retain_until)) => {
+            let mode =
+                objectlock::parse_ret_mode(mode).ok_or_else(|| Error::other("persisted object retention mode is invalid"))?;
+            let retain_until = OffsetDateTime::parse(retain_until, &time::format_description::well_known::Iso8601::DEFAULT)
+                .map(Date::from)
+                .map_err(|_| Error::other("persisted object retention date is invalid"))?;
+            Some((mode, retain_until))
+        }
+        _ => return Err(Error::other("persisted object retention metadata is incomplete")),
+    };
+
+    if let Some((mode, retain_until)) = &explicit_ret {
+        let mode_str = mode.as_str();
+        if is_retention_active(mode_str, Some(retain_until))
+            && let Some(reason) =
+                check_retention_blocks_deletion(mode_str, Some(OffsetDateTime::from(retain_until.clone())), bypass_governance)
+        {
+            return Ok(Some(reason));
+        }
+    }
+
+    if explicit_ret.is_none()
+        && let Some(default_retention) = config.and_then(|config| config.rule.as_ref()?.default_retention.as_ref())
         && let Some(mode) = &default_retention.mode
     {
         let mode_str = mode.as_str();
         if mode_str == ObjectLockRetentionMode::COMPLIANCE || mode_str == ObjectLockRetentionMode::GOVERNANCE {
             // Calculate retention expiration date from object modification time
-            if let Some(mod_time) = obj_info.mod_time {
-                let now = objectlock::utc_now_ntp();
-                let retain_until = if let Some(days) = default_retention.days {
-                    mod_time.saturating_add(time::Duration::days(days as i64))
-                } else {
-                    let years = default_retention.years?;
-                    add_years(mod_time, years)
-                };
+            let mod_time = obj_info
+                .mod_time
+                .ok_or_else(|| Error::other("persisted object modification time is missing"))?;
+            let now = objectlock::utc_now_ntp();
+            let retain_until = if let Some(days) = default_retention.days {
+                mod_time.saturating_add(time::Duration::days(i64::from(days)))
+            } else {
+                let years = default_retention
+                    .years
+                    .ok_or_else(|| Error::other("persisted bucket Object Lock retention period is invalid"))?;
+                add_years(mod_time, years)
+            };
 
-                if retain_until.unix_timestamp() > now.unix_timestamp()
-                    && let Some(reason) = check_retention_blocks_deletion(mode_str, Some(retain_until), bypass_governance)
-                {
-                    return Some(reason);
-                }
+            if retain_until.unix_timestamp() > now.unix_timestamp()
+                && let Some(reason) = check_retention_blocks_deletion(mode_str, Some(retain_until), bypass_governance)
+            {
+                return Ok(Some(reason));
             }
         }
     }
 
-    None
+    Ok(None)
+}
+
+pub(crate) fn check_object_lock_for_deletion_with_state(
+    state: &ObjectLockConfigState,
+    obj_info: &ObjectInfo,
+    bypass_governance: bool,
+) -> Result<Option<ObjectLockBlockReason>> {
+    match state {
+        ObjectLockConfigState::Configured { config, .. } => {
+            check_object_lock_for_deletion_with_config(Some(config), obj_info, bypass_governance)
+        }
+        ObjectLockConfigState::ConfirmedAbsent => check_object_lock_for_deletion_with_config(None, obj_info, bypass_governance),
+        ObjectLockConfigState::Fabricated => Err(Error::other("bucket Object Lock metadata is not authoritative")),
+    }
+}
+
+/// Compatibility wrapper for callers that predate fallible metadata lookup.
+/// An authority/read/parse failure is represented as a blocking reason rather
+/// than the old fail-open `None` result.
+pub async fn check_object_lock_for_deletion(
+    bucket: &str,
+    obj_info: &ObjectInfo,
+    bypass_governance: bool,
+) -> Option<ObjectLockBlockReason> {
+    match get_object_lock_config_state(bucket)
+        .await
+        .and_then(|state| check_object_lock_for_deletion_with_state(&state, obj_info, bypass_governance))
+    {
+        Ok(reason) => reason,
+        Err(_) => Some(ObjectLockBlockReason::LegalHold),
+    }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
+    use s3s::dto::{ObjectLockEnabled, ObjectLockRule};
     use time::{Date, Month, PrimitiveDateTime, Time};
 
     fn make_datetime(year: i32, month: u8, day: u8) -> OffsetDateTime {
@@ -278,6 +345,160 @@ mod tests {
         PrimitiveDateTime::new(date, time).assume_utc()
     }
 
+    fn default_retention_config(mode: &'static str) -> ObjectLockConfiguration {
+        ObjectLockConfiguration {
+            object_lock_enabled: Some(ObjectLockEnabled::from_static(ObjectLockEnabled::ENABLED)),
+            rule: Some(ObjectLockRule {
+                default_retention: Some(DefaultRetention {
+                    mode: Some(ObjectLockRetentionMode::from_static(mode)),
+                    days: Some(30),
+                    years: None,
+                }),
+            }),
+        }
+    }
+
+    #[test]
+    fn deletion_with_config_blocks_active_default_compliance_even_with_bypass() {
+        let config = default_retention_config(ObjectLockRetentionMode::COMPLIANCE);
+        let obj_info = ObjectInfo {
+            mod_time: Some(OffsetDateTime::now_utc()),
+            ..Default::default()
+        };
+
+        let result = check_object_lock_for_deletion_with_config(Some(&config), &obj_info, true);
+
+        assert!(matches!(result, Ok(Some(ObjectLockBlockReason::Retention { .. }))));
+    }
+
+    #[test]
+    fn deletion_with_config_allows_active_default_governance_with_bypass() {
+        let config = default_retention_config(ObjectLockRetentionMode::GOVERNANCE);
+        let obj_info = ObjectInfo {
+            mod_time: Some(OffsetDateTime::now_utc()),
+            ..Default::default()
+        };
+
+        assert!(matches!(
+            check_object_lock_for_deletion_with_config(Some(&config), &obj_info, true),
+            Ok(None)
+        ));
+    }
+
+    #[test]
+    fn deletion_with_default_retention_rejects_missing_object_mod_time() {
+        let config = default_retention_config(ObjectLockRetentionMode::COMPLIANCE);
+
+        let err = check_object_lock_for_deletion_with_config(Some(&config), &ObjectInfo::default(), false)
+            .expect_err("default retention needs an authoritative object modification time");
+
+        assert!(err.to_string().contains("modification time"));
+    }
+
+    #[test]
+    fn deletion_with_confirmed_absence_still_blocks_explicit_compliance() {
+        let retain_until = OffsetDateTime::now_utc() + time::Duration::days(30);
+        let mut user_defined = std::collections::HashMap::new();
+        user_defined.insert("x-amz-object-lock-mode".to_string(), ObjectLockRetentionMode::COMPLIANCE.to_string());
+        user_defined.insert(
+            "x-amz-object-lock-retain-until-date".to_string(),
+            retain_until
+                .format(&time::format_description::well_known::Rfc3339)
+                .expect("retain-until date should format"),
+        );
+        let obj_info = ObjectInfo {
+            user_defined: Arc::new(user_defined),
+            ..Default::default()
+        };
+
+        let result = check_object_lock_for_deletion_with_config(None, &obj_info, true);
+
+        assert!(matches!(result, Ok(Some(ObjectLockBlockReason::Retention { .. }))));
+    }
+
+    #[test]
+    fn deletion_with_fabricated_bucket_metadata_fails_closed() {
+        let err = check_object_lock_for_deletion_with_state(&ObjectLockConfigState::Fabricated, &ObjectInfo::default(), false)
+            .expect_err("non-authoritative Object Lock metadata must block deletion");
+
+        assert!(err.to_string().contains("not authoritative"));
+    }
+
+    #[test]
+    fn recursive_force_delete_with_fabricated_bucket_metadata_fails_closed() {
+        let err = ensure_recursive_force_delete_allowed_for_state("bucket", &ObjectLockConfigState::Fabricated)
+            .expect_err("non-authoritative Object Lock metadata must block recursive deletion");
+
+        assert!(err.to_string().contains("not authoritative"));
+    }
+
+    #[test]
+    fn deletion_rejects_incomplete_persisted_retention_metadata() {
+        let mut user_defined = std::collections::HashMap::new();
+        user_defined.insert(
+            X_AMZ_OBJECT_LOCK_MODE.as_str().to_string(),
+            ObjectLockRetentionMode::COMPLIANCE.to_string(),
+        );
+        let obj_info = ObjectInfo {
+            user_defined: Arc::new(user_defined),
+            ..Default::default()
+        };
+
+        let err = check_object_lock_for_deletion_with_config(None, &obj_info, false)
+            .expect_err("mode without retain-until date must fail closed");
+
+        assert!(err.to_string().contains("incomplete"));
+    }
+
+    #[test]
+    fn deletion_rejects_each_malformed_persisted_retention_shape() {
+        let valid_date = (OffsetDateTime::now_utc() + time::Duration::days(30))
+            .format(&time::format_description::well_known::Rfc3339)
+            .expect("retain-until date should format");
+        let cases = [
+            ("invalid mode", Some("INVALID"), Some(valid_date.as_str()), "retention mode"),
+            (
+                "invalid date",
+                Some(ObjectLockRetentionMode::COMPLIANCE),
+                Some("not-a-date"),
+                "retention date",
+            ),
+            ("date only", None, Some(valid_date.as_str()), "incomplete"),
+        ];
+
+        for (case, mode, retain_until, expected) in cases {
+            let mut user_defined = std::collections::HashMap::new();
+            if let Some(mode) = mode {
+                user_defined.insert(X_AMZ_OBJECT_LOCK_MODE.as_str().to_string(), mode.to_string());
+            }
+            if let Some(retain_until) = retain_until {
+                user_defined.insert(X_AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE.as_str().to_string(), retain_until.to_string());
+            }
+            let obj_info = ObjectInfo {
+                user_defined: Arc::new(user_defined),
+                ..Default::default()
+            };
+
+            let err = check_object_lock_for_deletion_with_config(None, &obj_info, false).expect_err(case);
+            assert!(err.to_string().contains(expected), "unexpected {case} error: {err}");
+        }
+    }
+
+    #[test]
+    fn deletion_rejects_invalid_persisted_legal_hold_metadata() {
+        let mut user_defined = std::collections::HashMap::new();
+        user_defined.insert(X_AMZ_OBJECT_LOCK_LEGAL_HOLD.as_str().to_string(), "INVALID".to_string());
+        let obj_info = ObjectInfo {
+            user_defined: Arc::new(user_defined),
+            ..Default::default()
+        };
+
+        let err = check_object_lock_for_deletion_with_config(None, &obj_info, false)
+            .expect_err("invalid legal-hold value must fail closed");
+
+        assert!(err.to_string().contains("legal-hold"));
+    }
+
     #[test]
     fn test_add_years_normal() {
         // Normal case: add 1 year to a regular date

crates/ecstore/src/bucket/quota/checker.rs

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 use super::{BucketQuota, QuotaCheckResult, QuotaError, QuotaOperation};
-use crate::bucket::metadata_sys::{BucketMetadataSys, update};
+use crate::bucket::metadata_sys::{BucketMetadataSys, update, update_if_incarnation};
 use crate::data_usage::get_bucket_usage_memory;
 use rustfs_common::metrics::Metric;
 use rustfs_config::QUOTA_CONFIG_FILE;
@@ -145,14 +145,35 @@ impl QuotaChecker {
     }
 
     pub async fn set_quota_config(&mut self, bucket: &str, quota: BucketQuota) -> Result<OffsetDateTime, QuotaError> {
+        self.set_quota_config_for_incarnation(bucket, quota, None).await
+    }
+
+    pub async fn set_quota_config_if_incarnation(
+        &mut self,
+        bucket: &str,
+        quota: BucketQuota,
+        expected_incarnation_id: uuid::Uuid,
+    ) -> Result<OffsetDateTime, QuotaError> {
+        self.set_quota_config_for_incarnation(bucket, quota, Some(expected_incarnation_id))
+            .await
+    }
+
+    async fn set_quota_config_for_incarnation(
+        &mut self,
+        bucket: &str,
+        quota: BucketQuota,
+        expected_incarnation_id: Option<uuid::Uuid>,
+    ) -> Result<OffsetDateTime, QuotaError> {
         let json_data = serde_json::to_vec(&quota).map_err(|e| QuotaError::InvalidConfig {
             reason: format!("Failed to serialize quota config: {}", e),
         })?;
         let start_time = Instant::now();
 
-        let updated_at = update(bucket, QUOTA_CONFIG_FILE, json_data)
-            .await
-            .map_err(QuotaError::StorageError)?;
+        let updated_at = match expected_incarnation_id {
+            Some(incarnation_id) => update_if_incarnation(bucket, QUOTA_CONFIG_FILE, json_data, incarnation_id).await,
+            None => update(bucket, QUOTA_CONFIG_FILE, json_data).await,
+        }
+        .map_err(QuotaError::StorageError)?;
 
         rustfs_common::metrics::Metrics::inc_time(Metric::QuotaSync, start_time.elapsed());
         Ok(updated_at)
@@ -177,11 +198,36 @@ impl QuotaChecker {
     }
 
     pub async fn get_real_time_usage(&self, bucket: &str) -> Result<u64, QuotaError> {
-        get_bucket_usage_memory(bucket)
-            .await
-            .ok_or_else(|| QuotaError::UsageUnavailable {
-                bucket: bucket.to_string(),
-            })
+        if let Some(usage) = get_bucket_usage_memory(bucket).await {
+            return Ok(usage);
+        }
+
+        // Degraded window (issue #5716): with no authoritative usage — most
+        // prominently after upgrading from a pre-v2 release, whose legacy
+        // `.usage.json` is demoted to non-authoritative until the scanner's
+        // first complete cycle persists `.usage.v2.json` — failing closed
+        // turned every write to a quota-enabled bucket into a retryable 503
+        // for the whole window. Quota admission instead degrades to the last
+        // persisted per-bucket size. That baseline is static between snapshot
+        // loads (live writes do not advance it), so hard-quota enforcement is
+        // advisory for the duration of the window: the overrun is bounded by
+        // the writes issued before the next complete scanner cycle. Buckets
+        // with no persisted baseline anywhere keep failing closed.
+        let store = self.metadata_sys.read().await.object_store();
+        // Box the fallback: it embeds the whole snapshot-load future, and every
+        // object write nests a quota check several futures deep, so keeping it
+        // inline would grow each write's state machine by the loader's full
+        // size — the debug-build 2MiB worker-stack overflow class fixed for
+        // bucket-config writes in #5648. The allocation only happens on the
+        // degraded path; the authoritative fast path returns above.
+        if let Some(baseline) = Box::pin(crate::data_usage::lookup_degraded_bucket_usage_baseline(store, bucket)).await {
+            debug!(bucket, baseline, "Bucket quota admission using degraded persisted usage baseline");
+            return Ok(baseline);
+        }
+
+        Err(QuotaError::UsageUnavailable {
+            bucket: bucket.to_string(),
+        })
     }
 }
 
@@ -211,6 +257,76 @@ mod tests {
         assert_eq!(result.quota_limit, None);
     }
 
+    /// Regression (issue #5716): an upgrade from a pre-v2 release leaves only
+    /// the legacy `.usage.json` snapshot, which has no completeness marker and
+    /// is demoted to non-authoritative, and the scanner's first complete cycle
+    /// can be a long way off. Quota admission must degrade to that persisted
+    /// baseline instead of failing every write to a quota-enabled bucket with
+    /// a retryable 503 for the whole window.
+    #[tokio::test]
+    #[serial]
+    async fn quota_admission_falls_back_to_legacy_snapshot_baseline() {
+        let (_dirs, ecstore) = isolated_store_over_temp_disks().await;
+        let sys = Arc::new(RwLock::new(BucketMetadataSys::new(ecstore.clone())));
+        let checker = QuotaChecker::new(sys);
+        let bucket = format!("quota-legacy-{}", Uuid::new_v4().simple());
+
+        let mut legacy = rustfs_data_usage::DataUsageInfo {
+            last_update: Some(std::time::SystemTime::now()),
+            buckets_count: 1,
+            ..Default::default()
+        };
+        legacy.buckets_usage.insert(
+            bucket.clone(),
+            rustfs_data_usage::BucketUsageInfo {
+                size: 1_234,
+                ..Default::default()
+            },
+        );
+        legacy.bucket_sizes.insert(bucket.clone(), 1_234);
+        // usage_snapshot_complete stays false: pre-v2 snapshots do not carry
+        // the field at all, so they always deserialize as incomplete.
+        let legacy_path = format!("{}/{}", crate::disk::BUCKET_META_PREFIX, rustfs_data_usage::LEGACY_DATA_USAGE_OBJECT_NAME);
+        crate::config::com::save_config(
+            ecstore.clone(),
+            &legacy_path,
+            serde_json::to_vec(&legacy).expect("legacy snapshot should encode"),
+        )
+        .await
+        .expect("legacy snapshot fixture should be stored");
+        crate::data_usage::invalidate_data_usage_snapshot_cache().await;
+
+        let usage = checker
+            .get_real_time_usage(&bucket)
+            .await
+            .expect("quota admission must degrade to the persisted legacy baseline");
+        assert_eq!(usage, 1_234);
+
+        // A bucket absent from every persisted snapshot still has no grounded
+        // baseline and must keep failing closed.
+        let unknown = format!("quota-unknown-{}", Uuid::new_v4().simple());
+        assert!(matches!(
+            checker.get_real_time_usage(&unknown).await,
+            Err(QuotaError::UsageUnavailable { .. })
+        ));
+
+        // Deleting the bucket's usage from the backend must purge the
+        // baseline: a recreated bucket may not inherit the dead incarnation's
+        // size, so with no persisted trace left it fails closed again.
+        crate::data_usage::remove_bucket_usage_from_backend(ecstore.clone(), &bucket)
+            .await
+            .expect("bucket usage removal should succeed");
+        assert!(matches!(
+            checker.get_real_time_usage(&bucket).await,
+            Err(QuotaError::UsageUnavailable { .. })
+        ));
+
+        crate::data_usage::prepare_bucket_usage_for_namespace_change(&bucket, None)
+            .await
+            .expect("test usage cache cleanup should succeed");
+        crate::data_usage::invalidate_data_usage_snapshot_cache().await;
+    }
+
     #[tokio::test]
     #[serial]
     async fn quota_usage_rejects_an_unknown_mutation_baseline() {

crates/ecstore/src/bucket/replication/README.md

@@ -100,11 +100,41 @@ paths.
     behind the ECStore replication facade; only `rustfs/src/app/storage_api.rs`
     may retain direct object/delete replication helper calls.
 
-## First Code-Bearing Step
+## Completion Criteria
 
-Start with `ReplicationRuntime` or `ReplicationEventSink`. Both can be added as
-narrow internal contracts while keeping current queue, MRF, resync, and target
-behavior unchanged. Do not start with a crate move.
+The split is complete when the "Current dependency to remove" column in the
+Required Contracts table above is empty: every row is either deleted because
+the dependency is gone, or reduced to "none". No other signal — file count,
+boundary count, line count — measures completion.
+
+Target end state:
+
+- `replication_pool.rs`, `replication_resyncer.rs`, and `replication_state.rs`
+  move into `crates/replication` behind the contracts above;
+- the `*_boundary.rs` and `*_bridge.rs` micro-files dissolve naturally as the
+  code they fence moves across the crate boundary. They are the mechanical
+  seams of the migration ratchet — the architecture guard scripts anchor on
+  their file names — so batch-merging them beforehand is explicitly rejected:
+  it forces synchronized guard-script/mod/import churn with zero functional
+  gain;
+- the only module that can retire early is `datatypes.rs`: delete it once its
+  facade consumers import the resync status enums through `rustfs-replication`
+  directly.
+
+## Milestones
+
+| Milestone | Scope | Status |
+|---|---|---|
+| M0 | Record the completion criteria and end state (this section). | Done |
+| M1 | Contract extraction: resync/queue/stats/object-decision/filemeta/storage wire contracts owned by `crates/replication`; ECStore imports concentrated in `*_boundary.rs`; event sink and runtime access behind local contracts. | Done — see Required Contracts |
+| M2 | Move resyncer pure decision logic (no IO) into `crates/replication`. | Pending; sequence after splitting the oversized resyncer/pool functions (`resync_bucket`, `replicate_all`, `start_mrf_processor`) so moves stay mechanical |
+| M3 | Move the worker runtime (`replication_pool.rs`, the IO paths of `replication_resyncer.rs`, `replication_state.rs`) once the contract traits are stable. Highest-risk step of the whole plan; do it last. | Pending |
+| M4 | Retire the boundary modules together with their guard-script entries; delete `datatypes.rs`. | Pending |
+
+The original first code-bearing step (narrow `ReplicationEventSink` /
+`ReplicationRuntime` contracts) has landed — `replication_event_sink.rs`
+exists and runtime access goes through local boundary aliases — so new work
+starts from M2.
 
 Current compatibility guard: `crates/ecstore/tests/replication_facade_compat_test.rs`
 keeps the ECStore replication facade types covered while architecture rules

crates/ecstore/src/bucket/replication/mod.rs

@@ -45,12 +45,12 @@ mod runtime_boundary;
 
 pub use datatypes::ResyncStatusType;
 pub use replication_config_boundary::{
-    ObjectOpts, ReplicationConfigurationExt, ReplicationTargetValidationError, invalid_replication_config_status_field,
-    replication_target_arns, should_remove_replication_target, unsupported_replication_config_field,
-    validate_replication_config_target_arns,
+    ObjectOpts, REMOTE_TARGET_CAPABILITY_CONTRACT_VERSION, REMOTE_TARGET_UNSUPPORTED_FIELDS, REMOTE_TARGET_WRITABLE_FIELDS,
+    REPLICATION_CAPABILITY_CONTRACT_VERSION, REPLICATION_READ_ONLY_HISTORICAL_FIELDS, REPLICATION_WRITABLE_FIELDS,
+    ReplicationConfigStructureError, ReplicationConfigurationExt, ReplicationTargetValidationError,
+    invalid_replication_config_status_field, replication_target_arns, should_remove_replication_target,
+    unsupported_replication_config_field, validate_replication_config_structure, validate_replication_config_target_arns,
 };
-#[cfg(test)]
-pub(crate) use replication_filemeta_boundary::ReplicateTargetDecision;
 pub(crate) use replication_filemeta_boundary::version_purge_statuses_map;
 pub use replication_filemeta_boundary::{
     MrfOpKind, MrfReplicateEntry, REPLICATE_INCOMING_DELETE, ReplicateDecision, ReplicateObjectInfo, ReplicationState,
@@ -70,16 +70,17 @@ pub use replication_object_decision_boundary::{
     should_use_existing_delete_replication_source,
 };
 pub use replication_pool::{
-    DurableMrfBacklog, DynReplicationPool, ReplicationPoolTrait, get_global_replication_pool, get_global_replication_stats,
-    init_background_replication, read_durable_mrf_backlog, resync_start_conflict_id,
+    DurableMrfBacklog, DynReplicationPool, ReplicationPoolTrait, commit_force_delete_intent, complete_force_delete_intent,
+    get_global_replication_pool, get_global_replication_stats, init_background_replication, persist_force_delete_intent,
+    read_durable_mrf_backlog, resync_start_conflict_id,
 };
 pub use replication_queue_boundary::{
-    DeletedObjectReplicationInfo, ReplicationHealQueueResult, ReplicationOperation, ReplicationPriority,
-    ReplicationQueueAdmission,
+    DeletedObjectReplicationInfo, ReplicationBatchAdmission, ReplicationHealQueueResult, ReplicationOperation,
+    ReplicationPriority, ReplicationQueueAdmission,
 };
 pub use replication_resync_boundary::{BucketReplicationResyncStatus, ResyncOpts, TargetReplicationResyncStatus};
 pub use replication_scanner_bridge::ReplicationScannerBridge;
 pub use replication_state::{ReplicationStats, RuntimeReplicationTargetBacklog};
-pub use replication_stats_boundary::BucketStats;
+pub use replication_stats_boundary::{BucketReplicationStats, BucketStats};
 pub use replication_storage_boundary::{ReplicationObjectIO, ReplicationStorage};
 pub(crate) use replication_target_config_bridge::ReplicationTargetConfigBridge;

crates/ecstore/src/bucket/replication/replication_config_boundary.rs

@@ -13,7 +13,9 @@
 // limitations under the License.
 
 pub use rustfs_replication::{
-    ObjectOpts, ReplicationConfigurationExt, ReplicationRuleExt, ReplicationTargetValidationError,
+    ObjectOpts, REMOTE_TARGET_CAPABILITY_CONTRACT_VERSION, REMOTE_TARGET_UNSUPPORTED_FIELDS, REMOTE_TARGET_WRITABLE_FIELDS,
+    REPLICATION_CAPABILITY_CONTRACT_VERSION, REPLICATION_READ_ONLY_HISTORICAL_FIELDS, REPLICATION_WRITABLE_FIELDS,
+    ReplicationConfigStructureError, ReplicationConfigurationExt, ReplicationRuleExt, ReplicationTargetValidationError,
     invalid_replication_config_status_field, replication_target_arns, should_remove_replication_target,
-    unsupported_replication_config_field, validate_replication_config_target_arns,
+    unsupported_replication_config_field, validate_replication_config_structure, validate_replication_config_target_arns,
 };

crates/ecstore/src/bucket/replication/replication_config_store.rs

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 use super::replication_error_boundary::Result;
-use super::replication_storage_boundary::ReplicationObjectIO;
+use super::replication_storage_boundary::{HTTPPreconditions, ObjectInfo, ObjectOptions, ReplicationObjectIO};
 use crate::config::{com, storageclass};
 use std::sync::Arc;
 
@@ -30,10 +30,98 @@ impl ReplicationConfigStore {
         com::read_config(api, file).await
     }
 
+    pub(crate) async fn read_limited<S>(api: Arc<S>, file: &str, max_bytes: usize) -> Result<Vec<u8>>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::read_config_limited(api, file, max_bytes).await
+    }
+
+    pub(crate) async fn read_no_lock<S>(api: Arc<S>, file: &str) -> Result<Vec<u8>>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::read_config_no_lock(api, file).await
+    }
+
+    pub(crate) async fn read_no_lock_with_metadata<S>(api: Arc<S>, file: &str) -> Result<(Vec<u8>, ObjectInfo)>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::read_config_with_metadata(
+            api,
+            file,
+            &ObjectOptions {
+                no_lock: true,
+                ..Default::default()
+            },
+        )
+        .await
+    }
+
+    pub(crate) async fn read_no_lock_with_metadata_preserve_empty<S>(api: Arc<S>, file: &str) -> Result<(Vec<u8>, ObjectInfo)>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::read_config_no_lock_preserve_empty_with_metadata(api, file).await
+    }
+
     pub(crate) async fn save<S>(api: Arc<S>, file: &str, data: Vec<u8>) -> Result<()>
     where
         S: ReplicationObjectIO,
     {
         com::save_config(api, file, data).await
     }
+
+    pub(crate) async fn save_no_lock<S>(api: Arc<S>, file: &str, data: Vec<u8>) -> Result<()>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::save_config_no_lock(api, file, data).await
+    }
+
+    pub(crate) async fn save_conditional<S>(
+        api: Arc<S>,
+        file: &str,
+        data: Vec<u8>,
+        http_preconditions: HTTPPreconditions,
+    ) -> Result<()>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::save_config_with_opts_quiet(
+            api,
+            file,
+            data,
+            &ObjectOptions {
+                max_parity: true,
+                http_preconditions: Some(http_preconditions),
+                ..Default::default()
+            },
+        )
+        .await
+    }
+
+    pub(crate) async fn save_conditional_no_lock<S>(
+        api: Arc<S>,
+        file: &str,
+        data: Vec<u8>,
+        http_preconditions: HTTPPreconditions,
+    ) -> Result<()>
+    where
+        S: ReplicationObjectIO,
+    {
+        com::save_config_with_opts_quiet(
+            api,
+            file,
+            data,
+            &ObjectOptions {
+                max_parity: true,
+                no_lock: true,
+                http_preconditions: Some(http_preconditions),
+                ..Default::default()
+            },
+        )
+        .await
+    }
 }

crates/ecstore/src/bucket/replication/replication_filemeta_boundary.rs

@@ -17,7 +17,7 @@ pub use rustfs_replication::{MrfOpKind, MrfReplicateEntry};
 pub(crate) use rustfs_replication::{
     REPLICATE_EXISTING, REPLICATE_EXISTING_DELETE, REPLICATE_HEAL_DELETE, ReplicateTargetDecision, ReplicatedInfos,
     ReplicatedTargetInfo, ReplicationAction, ReplicationWorkerOperation, ResyncDecision, get_replication_state,
-    parse_replicate_decision, target_reset_header, version_purge_statuses_map,
+    parse_replicate_decision, replicate_decision_for_admitted_targets, target_reset_header, version_purge_statuses_map,
 };
 pub use rustfs_replication::{
     REPLICATE_INCOMING_DELETE, ReplicateDecision, ReplicateObjectInfo, ReplicationState, ReplicationStatusType, ReplicationType,
@@ -52,6 +52,8 @@ pub(crate) fn replication_state_from_filemeta(state: &rustfs_filemeta::Replicati
             .map(|(arn, status)| (arn.clone(), version_purge_status_from_filemeta(status.clone())))
             .collect(),
         reset_statuses_map: state.reset_statuses_map.clone(),
+        target_delete_marker_version_ids: state.target_delete_marker_version_ids.clone(),
+        target_delete_marker_version_ids_corrupt: state.target_delete_marker_version_ids_corrupt,
     }
 }
 
@@ -83,5 +85,120 @@ pub fn replication_state_to_filemeta(state: &ReplicationState) -> rustfs_filemet
             .map(|(arn, status)| (arn.clone(), version_purge_status_to_filemeta(status.clone())))
             .collect(),
         reset_statuses_map: state.reset_statuses_map.clone(),
+        target_delete_marker_version_ids: state.target_delete_marker_version_ids.clone(),
+        target_delete_marker_version_ids_corrupt: state.target_delete_marker_version_ids_corrupt,
+    }
+}
+
+// Reconciliation tests for the deliberately duplicated wire types.
+//
+// `rustfs-filemeta` (xl.meta disk format) and `rustfs-replication` (MRF/resync
+// persistence format) each own a copy of `ReplicationStatusType`,
+// `VersionPurgeStatusType` and `ReplicationState`; the conversions above hop
+// between them via `as_str()`, whose `From<&str>` impls fall back to `Empty`
+// on any unknown token. That fallback silently degrades data the moment one
+// side gains a variant the other lacks, so these tests pin the two sides
+// together:
+//
+// - the `match` statements are exhaustive with no `_` arm — adding a variant
+//   on either side fails compilation here until the mapping is reconsidered;
+// - the round-trips assert the string token survives both directions — a
+//   variant whose token the other side does not recognize fails the assert
+//   instead of quietly becoming `Empty`.
+//
+// Struct-shaped drift on `ReplicationState` is already compile-guarded by the
+// exhaustive struct literals in the two conversion functions above; the
+// round-trip test below additionally pins value fidelity for every field.
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::collections::HashMap;
+
+    #[test]
+    fn replication_status_variants_round_trip_across_boundary() {
+        use rustfs_replication::ReplicationStatusType as Repl;
+
+        let all = [
+            Repl::Pending,
+            Repl::Completed,
+            Repl::CompletedLegacy,
+            Repl::Failed,
+            Repl::Replica,
+            Repl::Empty,
+        ];
+        for status in all {
+            // Exhaustive on the replication side: a new variant breaks this match.
+            match status {
+                Repl::Pending | Repl::Completed | Repl::CompletedLegacy | Repl::Failed | Repl::Replica | Repl::Empty => {}
+            }
+            let filemeta = replication_status_to_filemeta(status.clone());
+            assert_eq!(
+                filemeta.as_str(),
+                status.as_str(),
+                "replication->filemeta conversion must not degrade {status:?} (unknown tokens fall back to Empty)"
+            );
+            assert_eq!(replication_status_from_filemeta(filemeta), status);
+        }
+
+        // Exhaustive on the filemeta side: a new variant breaks this match.
+        fn _filemeta_side_is_covered(status: rustfs_filemeta::ReplicationStatusType) {
+            use rustfs_filemeta::ReplicationStatusType as Meta;
+            match status {
+                Meta::Pending | Meta::Completed | Meta::CompletedLegacy | Meta::Failed | Meta::Replica | Meta::Empty => {}
+            }
+        }
+    }
+
+    #[test]
+    fn version_purge_status_variants_round_trip_across_boundary() {
+        use rustfs_replication::VersionPurgeStatusType as Repl;
+
+        let all = [Repl::Pending, Repl::Complete, Repl::Failed, Repl::Empty];
+        for status in all {
+            // Exhaustive on the replication side: a new variant breaks this match.
+            match status {
+                Repl::Pending | Repl::Complete | Repl::Failed | Repl::Empty => {}
+            }
+            let filemeta = version_purge_status_to_filemeta(status.clone());
+            assert_eq!(
+                filemeta.as_str(),
+                status.as_str(),
+                "replication->filemeta conversion must not degrade {status:?} (unknown tokens fall back to Empty)"
+            );
+            assert_eq!(version_purge_status_from_filemeta(filemeta), status);
+        }
+
+        // Exhaustive on the filemeta side: a new variant breaks this match.
+        fn _filemeta_side_is_covered(status: rustfs_filemeta::VersionPurgeStatusType) {
+            use rustfs_filemeta::VersionPurgeStatusType as Meta;
+            match status {
+                Meta::Pending | Meta::Complete | Meta::Failed | Meta::Empty => {}
+            }
+        }
+    }
+
+    #[test]
+    fn replication_state_round_trips_every_field_across_boundary() {
+        let timestamp = time::OffsetDateTime::from_unix_timestamp(1_700_000_000).expect("valid timestamp");
+        let state = ReplicationState {
+            replica_timestamp: Some(timestamp),
+            replica_status: ReplicationStatusType::Replica,
+            delete_marker: true,
+            replication_timestamp: Some(timestamp),
+            replication_status_internal: Some("arn:a=PENDING;".to_string()),
+            version_purge_status_internal: Some("arn:a=FAILED;".to_string()),
+            replicate_decision_str: "arn:a=true;false;;".to_string(),
+            targets: HashMap::from([
+                ("arn:a".to_string(), ReplicationStatusType::Completed),
+                ("arn:b".to_string(), ReplicationStatusType::Failed),
+            ]),
+            purge_targets: HashMap::from([("arn:a".to_string(), VersionPurgeStatusType::Pending)]),
+            reset_statuses_map: HashMap::from([("reset-arn:a".to_string(), "reset-id;ts".to_string())]),
+            target_delete_marker_version_ids: HashMap::from([("arn:a".to_string(), "version-1".to_string())]),
+            target_delete_marker_version_ids_corrupt: true,
+        };
+
+        let round_tripped = replication_state_from_filemeta(&replication_state_to_filemeta(&state));
+        assert_eq!(round_tripped, state);
     }
 }

crates/ecstore/src/bucket/replication/replication_metadata_boundary.rs

@@ -32,6 +32,9 @@ pub(crate) struct ReplicationMetadataStore;
 
 impl ReplicationMetadataStore {
     pub(crate) const MRF_REPLICATION_FILE: &'static str = "config/replication/mrf.bin";
+    pub(crate) const MRF_REPLICATION_RECOVERY_LOCK: &'static str = "config/replication/mrf.bin.recovery";
+    pub(crate) const FORCE_DELETE_REPLICATION_FILE: &'static str = "config/replication/force-delete.bin";
+    pub(crate) const FORCE_DELETE_REPLICATION_TRANSACTION_LOCK: &'static str = "config/replication/force-delete.bin.transaction";
 
     pub(crate) async fn replication_config(bucket: &str) -> Result<(ReplicationConfiguration, OffsetDateTime)> {
         metadata_sys::get_replication_config(bucket).await
@@ -109,5 +112,17 @@ mod tests {
             "buckets/bucket-a/.replication/resync.bin"
         );
         assert_eq!(ReplicationMetadataStore::MRF_REPLICATION_FILE, "config/replication/mrf.bin");
+        assert_eq!(
+            ReplicationMetadataStore::MRF_REPLICATION_RECOVERY_LOCK,
+            "config/replication/mrf.bin.recovery"
+        );
+        assert_eq!(
+            ReplicationMetadataStore::FORCE_DELETE_REPLICATION_FILE,
+            "config/replication/force-delete.bin"
+        );
+        assert_eq!(
+            ReplicationMetadataStore::FORCE_DELETE_REPLICATION_TRANSACTION_LOCK,
+            "config/replication/force-delete.bin.transaction"
+        );
     }
 }

crates/ecstore/src/bucket/replication/replication_object_bridge.rs

@@ -15,7 +15,7 @@
 use std::{collections::HashMap, sync::Arc};
 
 use super::replication_error_boundary::Result;
-use super::replication_filemeta_boundary::{ReplicateDecision, ReplicationStatusType, ReplicationType};
+use super::replication_filemeta_boundary::{ReplicateDecision, ReplicatedTargetInfo, ReplicationStatusType, ReplicationType};
 use super::replication_metadata_boundary::ReplicationInstanceContext;
 use super::replication_object_config::{
     DeleteReplicationConfigSnapshot, check_replicate_delete, check_replicate_delete_strict, check_replicate_delete_with_snapshot,
@@ -89,6 +89,13 @@ impl ReplicationObjectBridge {
         snapshot.has_active_rule(object)
     }
 
+    pub fn force_delete_target_set(
+        snapshot: &DeleteReplicationConfigSnapshot,
+        prefix: &str,
+    ) -> Option<(Vec<String>, time::OffsetDateTime)> {
+        snapshot.force_delete_target_set(prefix)
+    }
+
     pub fn check_delete_with_snapshot(
         object: &ObjectToDelete,
         source: &ObjectInfo,
@@ -112,6 +119,31 @@ impl ReplicationObjectBridge {
         schedule_replication_delete(delete_object).await;
     }
 
+    pub async fn schedule_deletes(delete_objects: &[DeletedObjectReplicationInfo]) {
+        if let Some(pool) = super::runtime_boundary::replication_pool() {
+            let _ = pool.queue_replica_delete_batch(delete_objects).await;
+        }
+
+        if let Some(stats) = super::runtime_boundary::replication_stats() {
+            for delete_object in delete_objects {
+                if let Some(rs) = &delete_object.delete_object.replication_state {
+                    for k in rs.targets.keys() {
+                        let ri = ReplicatedTargetInfo {
+                            arn: k.clone(),
+                            size: 0,
+                            duration: std::time::Duration::default(),
+                            op_type: ReplicationType::Delete,
+                            ..Default::default()
+                        };
+                        stats
+                            .update(&delete_object.bucket, &ri, ReplicationStatusType::Pending, ReplicationStatusType::Empty)
+                            .await;
+                    }
+                }
+            }
+        }
+    }
+
     pub async fn schedule_storage_delete(delete_object: DeletedObject, bucket: String, event_type: String) {
         Self::schedule_delete(DeletedObjectReplicationInfo {
             delete_object: deleted_object_for_replication(delete_object),
@@ -121,6 +153,19 @@ impl ReplicationObjectBridge {
         })
         .await;
     }
+
+    pub async fn schedule_storage_deletes(delete_objects: Vec<DeletedObject>, bucket: String, event_type: String) {
+        let delete_objects = delete_objects
+            .into_iter()
+            .map(|delete_object| DeletedObjectReplicationInfo {
+                delete_object: deleted_object_for_replication(delete_object),
+                bucket: bucket.clone(),
+                event_type: event_type.clone(),
+                ..Default::default()
+            })
+            .collect::<Vec<_>>();
+        Self::schedule_deletes(&delete_objects).await;
+    }
 }
 
 #[cfg(test)]

crates/ecstore/src/bucket/replication/replication_object_config.rs

@@ -18,6 +18,7 @@ use crate::bucket::metadata::BucketMetadata;
 use rustfs_utils::http::AMZ_BUCKET_REPLICATION_STATUS;
 use s3s::dto::{BucketVersioningStatus, ReplicationConfiguration, ReplicationRuleStatus, VersioningConfiguration};
 use serde::{Deserialize, Serialize};
+use time::OffsetDateTime;
 use tracing::error;
 
 use super::replication_config_boundary::{
@@ -83,6 +84,15 @@ impl DeleteReplicationConfigSnapshot {
             .and_then(|metadata| metadata.replication_config.as_ref())
     }
 
+    pub(crate) fn force_delete_target_set(&self, prefix: &str) -> Option<(Vec<String>, OffsetDateTime)> {
+        self.metadata.as_ref().and_then(|metadata| {
+            metadata
+                .replication_config
+                .as_ref()
+                .map(|config| (config.filter_force_delete_target_arns(prefix), metadata.replication_config_updated_at))
+        })
+    }
+
     pub(crate) fn has_active_rule(&self, object: &str) -> bool {
         self.replication_config()
             .is_some_and(|config| config.has_active_rules(object, true))
@@ -556,7 +566,7 @@ pub(crate) async fn must_replicate(bucket: &str, object: &str, mopts: MustReplic
         let mut sopts = opts.clone();
         sopts.target_arn = arn.clone();
 
-        let replicate = cfg.replicate(&sopts);
+        let replicate = cfg.replicate(&sopts) && mopts.metadata_target_is_eligible(&arn);
         let synchronous = if let Some(cli) = cli { cli.replicate_sync } else { false };
 
         dsc.set(ReplicateTargetDecision::new(arn, replicate, synchronous));

crates/ecstore/src/bucket/replication/replication_queue_boundary.rs

@@ -13,8 +13,8 @@
 // limitations under the License.
 
 pub use rustfs_replication::{
-    DeletedObjectReplicationInfo, ReplicationHealQueueResult, ReplicationOperation, ReplicationPriority,
-    ReplicationQueueAdmission,
+    DeletedObjectReplicationInfo, ReplicationBatchAdmission, ReplicationHealQueueResult, ReplicationOperation,
+    ReplicationPriority, ReplicationQueueAdmission,
 };
 pub(crate) use rustfs_replication::{
     LARGE_WORKER_COUNT, ReplicationBackpressureRecommendation, ReplicationBackpressureState, ReplicationHealQueueAction,

crates/ecstore/src/bucket/replication/replication_resync_boundary.rs

@@ -23,6 +23,7 @@ pub(crate) use rustfs_replication::{
 
 pub(crate) const RESYNC_META_FORMAT: u16 = rustfs_replication::resync::RESYNC_META_FORMAT;
 pub(crate) const RESYNC_META_VERSION: u16 = rustfs_replication::resync::RESYNC_META_VERSION;
+pub(crate) const RESYNC_FILE_MAX_BYTES: usize = rustfs_replication::RESYNC_FILE_MAX_BYTES;
 pub(crate) const WIRE_ZERO_TIME_UNIX: i64 = rustfs_replication::resync::WIRE_ZERO_TIME_UNIX;
 pub(crate) const MRF_META_FORMAT: u16 = rustfs_replication::mrf::MRF_META_FORMAT;
 pub(crate) const MRF_META_VERSION: u16 = rustfs_replication::mrf::MRF_META_VERSION;

crates/ecstore/src/bucket/replication/replication_resyncer.rs

@@ -19,7 +19,7 @@ use super::replication_error_boundary::{Result, is_err_object_not_found, is_err_
 use super::replication_event_sink::{EventArgs, send_event, send_local_event};
 use super::replication_filemeta_boundary::{
     NULL_VERSION_ID, REPLICATE_EXISTING, REPLICATE_EXISTING_DELETE, ReplicateDecision, ReplicateObjectInfo, ReplicatedInfos,
-    ReplicatedTargetInfo, ReplicationAction, ReplicationStatusType, ReplicationType, VersionPurgeStatusType,
+    ReplicatedTargetInfo, ReplicationAction, ReplicationState, ReplicationStatusType, ReplicationType, VersionPurgeStatusType,
     get_replication_state, parse_replicate_decision, replication_statuses_map, target_reset_header, version_purge_statuses_map,
 };
 use super::replication_lock_boundary::ReplicationLockTiming;
@@ -96,7 +96,6 @@ const EVENT_REPLICATION_FORCE_DELETE_SKIPPED: &str = "replication_force_delete_s
 const EVENT_RESYNC_TASK_FAILED: &str = "replication_resync_task_failed";
 const EVENT_RESYNC_TARGET_OPERATION_FAILED: &str = "replication_resync_target_operation_failed";
 const EVENT_RESYNC_RUNTIME_CHANNEL_FAILED: &str = "replication_resync_runtime_channel_failed";
-const ERR_REPLICATION_METADATA_COPY_UNSUPPORTED: &str = "metadata-only replication is not implemented";
 const REPLICATION_TARGET_OFFLINE_ERROR_MARKERS: &[&str] = &[
     "dispatch failure",
     "timeouterror",
@@ -210,7 +209,7 @@ fn is_replication_target_offline_error(err: &(impl Display + ?Sized)) -> bool {
         .any(|marker| message.contains(marker))
 }
 
-async fn mark_replication_target_offline_if_needed(target_client: &TargetClient, err: &(impl Display + ?Sized)) {
+async fn mark_replication_target_offline_if_needed(target_client: &Arc<TargetClient>, err: &(impl Display + ?Sized)) {
     if is_replication_target_offline_error(err) {
         ReplicationTargetStore::mark_target_offline(target_client).await;
     }
@@ -793,6 +792,7 @@ impl ReplicationResyncer {
             let storage = storage.clone();
             let results_tx = results_tx.clone();
             let bucket_name = opts.bucket.clone();
+            let target_arn = opts.arn.clone();
 
             let f = tokio::spawn(async move {
                 while let Some(mut roi) = rx.recv().await {
@@ -820,6 +820,7 @@ impl ReplicationResyncer {
                             bucket: roi.bucket.clone(),
                             event_type: REPLICATE_EXISTING_DELETE.to_string(),
                             op_type: ReplicationType::ExistingObject,
+                            target_arn: target_arn.clone(),
                             ..Default::default()
                         };
                         replicate_delete(doi, storage.clone()).await;
@@ -1202,12 +1203,19 @@ pub(crate) async fn save_resync_status<S: ReplicationObjectIO>(
 }
 
 pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicationInfo, storage: Arc<S>) {
+    let _ = replicate_delete_with_outcome(dobj, storage).await;
+}
+
+pub(crate) async fn replicate_delete_with_outcome<S: ReplicationStorage>(
+    dobj: DeletedObjectReplicationInfo,
+    storage: Arc<S>,
+) -> bool {
     if dobj.delete_object.force_delete {
-        replicate_force_delete_to_targets(&dobj, storage).await;
-        return;
+        return replicate_force_delete_to_targets(&dobj, storage).await;
     }
 
     let bucket = dobj.bucket.clone();
+    let mut source_state_verified = true;
     let version_id = if let Some(version_id) = &dobj.delete_object.delete_marker_version_id {
         Some(version_id.to_owned())
     } else {
@@ -1244,7 +1252,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                     reason = "source_not_delete_marker",
                     "Skipping stale delete-marker replication"
                 );
-                return;
+                return true;
             }
             Err(err) if is_err_object_not_found(&err) || is_err_version_not_found(&err) => {
                 debug!(
@@ -1257,9 +1265,10 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                     reason = "source_version_missing",
                     "Skipping stale delete-marker replication"
                 );
-                return;
+                return true;
             }
             Err(err) => {
+                source_state_verified = false;
                 debug!(
                     event = EVENT_REPLICATION_DELETE_SKIPPED,
                     component = LOG_COMPONENT_ECSTORE,
@@ -1309,7 +1318,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return false;
         }
     };
     let ns_lock = match storage
@@ -1341,7 +1350,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return false;
         }
     };
 
@@ -1371,7 +1380,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return false;
         }
     };
 
@@ -1384,6 +1393,12 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
     let mut join_set = JoinSet::new();
 
     // Process each target
+    let target_arns = dobj.admitted_target_arns();
+    let expected_targets = dsc
+        .targets_map
+        .values()
+        .filter(|target| target.replicate && (target_arns.is_empty() || target_arns.iter().any(|arn| arn == &target.arn)))
+        .count();
     for tgt_entry in dsc.targets_map.values() {
         // Skip targets that should not be replicated
         if !tgt_entry.replicate {
@@ -1391,7 +1406,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
         }
 
         // If dobj.TargetArn is not empty string, this is a case of specific target being re-synced.
-        if !dobj.target_arn.is_empty() && dobj.target_arn != tgt_entry.arn {
+        if !target_arns.is_empty() && !target_arns.iter().any(|arn| arn == &tgt_entry.arn) {
             continue;
         }
 
@@ -1463,7 +1478,8 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
 
     let is_version_purge = is_version_delete_replication(&dobj.delete_object);
 
-    if should_retry_delete_marker_purge(&dobj.delete_object) {
+    let requires_delayed_purge = should_retry_delete_marker_purge(&dobj.delete_object);
+    if requires_delayed_purge {
         let bucket_clone = bucket.clone();
         let dobj_clone = dobj.clone();
         let dsc_clone = dsc.clone();
@@ -1534,7 +1550,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
         EventName::ObjectReplicationFailed.to_string()
     };
 
-    match storage
+    let state_persisted = match storage
         .delete_object(
             &bucket,
             &dobj.delete_object.object_name,
@@ -1556,6 +1572,7 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                 object,
                 ..Default::default()
             });
+            true
         }
         Err(e) => {
             error!(
@@ -1581,8 +1598,16 @@ pub async fn replicate_delete<S: ReplicationStorage>(dobj: DeletedObjectReplicat
                 },
                 ..Default::default()
             });
+            false
         }
-    }
+    };
+
+    expected_targets > 0
+        && rinfos.targets.len() == expected_targets
+        && state_persisted
+        && source_state_verified
+        && !requires_delayed_purge
+        && replication_status == ReplicationStatusType::Completed
 }
 
 async fn source_delete_marker_missing<S: EcstoreObjectOperations>(
@@ -1609,6 +1634,29 @@ async fn source_delete_marker_missing<S: EcstoreObjectOperations>(
     }
 }
 
+/// Which version a delete-marker purge should address on one target.
+///
+/// `None` means do not purge at all: the recorded mapping disagreed across the
+/// dual internal prefixes, and guessing an id could destroy a live version on
+/// the target. `Some(id)` is the exact version the target reported when it
+/// accepted the marker; falling back to a source-derived id is only correct
+/// when the target mirrors source version ids, which a generic S3 target does
+/// not.
+fn delete_marker_purge_version_id(
+    state: Option<&ReplicationState>,
+    arn: &str,
+    delete_marker_version_id: Uuid,
+) -> Option<Option<String>> {
+    if state.is_some_and(|state| state.target_delete_marker_version_ids_corrupt) {
+        return None;
+    }
+    let recorded = state.and_then(|state| state.target_delete_marker_version_ids.get(arn).cloned());
+    Some(match recorded {
+        Some(version_id) => Some(version_id),
+        None => target_delete_version_id(delete_marker_version_id, true),
+    })
+}
+
 async fn replicate_delete_marker_purge_to_targets(bucket: &str, dobj: &DeletedObjectReplicationInfo, dsc: &ReplicateDecision) {
     let Some(delete_marker_version_id) = dobj.delete_object.delete_marker_version_id else {
         return;
@@ -1618,75 +1666,100 @@ async fn replicate_delete_marker_purge_to_targets(bucket: &str, dobj: &DeletedOb
         if !tgt_entry.replicate {
             continue;
         }
-        if !dobj.target_arn.is_empty() && dobj.target_arn != tgt_entry.arn {
+        let target_arns = dobj.admitted_target_arns();
+        if !target_arns.is_empty() && !target_arns.iter().any(|arn| arn == &tgt_entry.arn) {
             continue;
         }
         let Some(tgt_client) = ReplicationTargetStore::remote_target_client(bucket, &tgt_entry.arn).await else {
             continue;
         };
 
+        let Some(purge_version_id) = delete_marker_purge_version_id(
+            dobj.delete_object.replication_state.as_ref(),
+            &tgt_entry.arn,
+            delete_marker_version_id,
+        ) else {
+            warn!(
+                component = LOG_COMPONENT_ECSTORE,
+                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+                bucket,
+                object = dobj.delete_object.object_name,
+                arn = tgt_entry.arn,
+                "Skipping delete-marker purge: recorded target version metadata is inconsistent"
+            );
+            continue;
+        };
+
         let _ = tgt_client
             .remove_object(
                 &tgt_client.bucket,
                 &dobj.delete_object.object_name,
-                target_delete_version_id(delete_marker_version_id, true),
+                purge_version_id,
                 replication_delete_marker_purge_remove_options(dobj.delete_object.delete_marker_mtime),
             )
             .await;
     }
 }
 
-async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &DeletedObjectReplicationInfo, storage: Arc<S>) {
+async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &DeletedObjectReplicationInfo, storage: Arc<S>) -> bool {
     let bucket = &dobj.bucket;
     let object_name = &dobj.delete_object.object_name;
+    let admitted_target_arns = dobj.admitted_target_arns();
 
-    let rcfg = match get_replication_config(bucket).await {
-        Ok(Some(config)) => config,
-        Ok(None) => {
-            debug!(
-                event = EVENT_REPLICATION_FORCE_DELETE_SKIPPED,
-                component = LOG_COMPONENT_ECSTORE,
-                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                bucket = %bucket,
-                reason = "replication_config_missing",
-                "Skipping replication force-delete because replication config is missing"
-            );
-            send_local_event(EventArgs {
-                event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                bucket_name: bucket.clone(),
-                object: ObjectInfo {
-                    bucket: bucket.clone(),
-                    name: object_name.clone(),
-                    ..Default::default()
-                },
-                user_agent: "Internal: [Replication]".to_string(),
+    let legacy_target_arns = if admitted_target_arns.is_empty() {
+        match get_replication_config(bucket).await {
+            Ok(Some(config)) => config.filter_target_arns(&ObjectOpts {
+                name: object_name.clone(),
                 ..Default::default()
-            });
-            return;
-        }
-        Err(err) => {
-            debug!(
-                event = EVENT_REPLICATION_FORCE_DELETE_SKIPPED,
-                component = LOG_COMPONENT_ECSTORE,
-                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                bucket = %bucket,
-                error = %err,
-                reason = "replication_config_lookup_failed",
-                "Skipping replication force-delete because replication config lookup failed"
-            );
-            send_local_event(EventArgs {
-                event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                bucket_name: bucket.clone(),
-                object: ObjectInfo {
-                    bucket: bucket.clone(),
-                    name: object_name.clone(),
+            }),
+            Ok(None) => {
+                debug!(
+                    event = EVENT_REPLICATION_FORCE_DELETE_SKIPPED,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+                    bucket = %bucket,
+                    reason = "replication_config_missing",
+                    "Skipping replication force-delete because replication config is missing"
+                );
+                send_local_event(EventArgs {
+                    event_name: EventName::ObjectReplicationNotTracked.to_string(),
+                    bucket_name: bucket.clone(),
+                    object: ObjectInfo {
+                        bucket: bucket.clone(),
+                        name: object_name.clone(),
+                        ..Default::default()
+                    },
+                    user_agent: "Internal: [Replication]".to_string(),
                     ..Default::default()
-                },
-                user_agent: "Internal: [Replication]".to_string(),
-                ..Default::default()
-            });
-            return;
+                });
+                Vec::new()
+            }
+            Err(err) => {
+                debug!(
+                    event = EVENT_REPLICATION_FORCE_DELETE_SKIPPED,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+                    bucket = %bucket,
+                    error = %err,
+                    reason = "replication_config_lookup_failed",
+                    "Skipping replication force-delete because replication config lookup failed"
+                );
+                send_local_event(EventArgs {
+                    event_name: EventName::ObjectReplicationNotTracked.to_string(),
+                    bucket_name: bucket.clone(),
+                    object: ObjectInfo {
+                        bucket: bucket.clone(),
+                        name: object_name.clone(),
+                        ..Default::default()
+                    },
+                    user_agent: "Internal: [Replication]".to_string(),
+                    ..Default::default()
+                });
+                Vec::new()
+            }
         }
+    } else {
+        Vec::new()
     };
 
     let ns_lock = match storage
@@ -1716,7 +1789,7 @@ async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &Deleted
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return false;
         }
     };
 
@@ -1744,23 +1817,25 @@ async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &Deleted
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return false;
         }
     };
 
-    let tgt_arns = if !dobj.target_arn.is_empty() {
-        vec![dobj.target_arn.clone()]
+    let tgt_arns = if admitted_target_arns.is_empty() {
+        legacy_target_arns
     } else {
-        rcfg.filter_target_arns(&ObjectOpts {
-            name: object_name.clone(),
-            ..Default::default()
-        })
+        admitted_target_arns
     };
+    if tgt_arns.is_empty() {
+        return false;
+    }
 
     let mut join_set = JoinSet::new();
+    let mut all_succeeded = true;
 
     for arn in tgt_arns {
         let Some(tgt_client) = ReplicationTargetStore::remote_target_client(bucket, &arn).await else {
+            all_succeeded = false;
             debug!(
                 event = EVENT_REPLICATION_FORCE_DELETE_SKIPPED,
                 component = LOG_COMPONENT_ECSTORE,
@@ -1810,7 +1885,7 @@ async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &Deleted
                     user_agent: "Internal: [Replication]".to_string(),
                     ..Default::default()
                 });
-                return;
+                return false;
             }
 
             if let Err(e) = tgt_client
@@ -1839,24 +1914,49 @@ async fn replicate_force_delete_to_targets<S: ReplicationStorage>(dobj: &Deleted
                     user_agent: "Internal: [Replication]".to_string(),
                     ..Default::default()
                 });
+                return false;
             }
+
+            true
         });
     }
 
     while let Some(result) = join_set.join_next().await {
-        if let Err(e) = result {
-            error!(
-                event = EVENT_RESYNC_TASK_FAILED,
-                component = LOG_COMPONENT_ECSTORE,
-                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                bucket = %bucket,
-                object = %object_name,
-                operation = "force_delete",
-                error = %e,
-                "Replication resync task failed"
-            );
+        match result {
+            Ok(success) => all_succeeded &= success,
+            Err(error) => {
+                all_succeeded = false;
+                error!(
+                    event = EVENT_RESYNC_TASK_FAILED,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+                    bucket = %bucket,
+                    object = %object_name,
+                    operation = "force_delete",
+                    error = %error,
+                    "Replication resync task failed"
+                );
+            }
         }
     }
+
+    if all_succeeded
+        && let Some(operation_id) = dobj.delete_object.force_delete_id
+        && let Err(error) = super::replication_pool::complete_force_delete_intent(storage, operation_id).await
+    {
+        warn!(
+            component = LOG_COMPONENT_ECSTORE,
+            subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+            bucket = %bucket,
+            object = %object_name,
+            operation_id = %operation_id,
+            error = %error,
+            "Force-delete replication completed but durable intent cleanup failed"
+        );
+        return false;
+    }
+
+    all_succeeded
 }
 
 fn target_delete_version_id(version_id: Uuid, version_purge: bool) -> Option<String> {
@@ -1946,16 +2046,24 @@ async fn replicate_delete_to_target(dobj: &DeletedObjectReplicationInfo, tgt_cli
         )
         .await
     {
-        Ok(_) => {
+        Ok(assigned_version_id) => {
             debug!(
                 bucket = tgt_client.bucket,
                 object = dobj.delete_object.object_name,
                 version_id = ?version_id,
+                assigned_version_id = ?assigned_version_id,
                 delete_marker = dobj.delete_object.delete_marker,
                 is_version_purge,
                 "replicate_delete_to_target succeeded"
             );
             if !is_version_purge {
+                // Record the version the target actually assigned to the marker it
+                // just created. A later purge addresses that id directly instead of
+                // deriving one from the source uuid, which only holds when the
+                // target mirrors source version ids.
+                if dobj.delete_object.delete_marker {
+                    rinfo.target_delete_marker_version_id = assigned_version_id.filter(|version_id| !version_id.is_empty());
+                }
                 rinfo.replication_status = ReplicationStatusType::Completed;
             } else {
                 rinfo.version_purge_status = VersionPurgeStatusType::Complete;
@@ -2001,61 +2109,18 @@ async fn replicate_delete_to_target(dobj: &DeletedObjectReplicationInfo, tgt_cli
     rinfo
 }
 
-pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, storage: Arc<S>) {
+pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, storage: Arc<S>) -> ReplicationState {
+    replicate_object_with_outcome(roi, storage).await.0
+}
+
+pub(crate) async fn replicate_object_with_outcome<S: ReplicationStorage>(
+    roi: ReplicateObjectInfo,
+    storage: Arc<S>,
+) -> (ReplicationState, bool) {
     let bucket = roi.bucket.clone();
     let object = roi.name.clone();
 
-    let cfg = match get_replication_config(&bucket).await {
-        Ok(Some(config)) => config,
-        Ok(None) => {
-            debug!(
-                event = EVENT_RESYNC_CONFIG_LOOKUP_SKIPPED,
-                component = LOG_COMPONENT_ECSTORE,
-                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                bucket = %bucket,
-                reason = "replication_config_missing",
-                "Skipping replication object because replication config is missing"
-            );
-            send_local_event(EventArgs {
-                event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                bucket_name: bucket.clone(),
-                object: roi.to_object_info(),
-                user_agent: "Internal: [Replication]".to_string(),
-                ..Default::default()
-            });
-            return;
-        }
-        Err(err) => {
-            error!(
-                event = EVENT_RESYNC_CONFIG_LOOKUP_SKIPPED,
-                component = LOG_COMPONENT_ECSTORE,
-                subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                bucket = %bucket,
-                reason = "replication_config_lookup_failed",
-                error = %err,
-                "Failed to look up replication config for object replication"
-            );
-            send_local_event(EventArgs {
-                event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                bucket_name: bucket.clone(),
-                object: roi.to_object_info(),
-                user_agent: "Internal: [Replication]".to_string(),
-                ..Default::default()
-            });
-            return;
-        }
-    };
-
-    let tgt_arns = cfg.filter_target_arns(&ObjectOpts {
-        name: object.clone(),
-        user_tags: roi.user_tags.clone(),
-        ssec: roi.ssec,
-        op_type: roi.op_type,
-        // ExistingObject ops must respect per-rule ExistingObjectReplicationStatus.
-        // Heal ops intentionally bypass it (repairing a past failure is not an initial sync).
-        existing_object: roi.op_type == ReplicationType::ExistingObject,
-        ..Default::default()
-    });
+    let tgt_arns = roi.admitted_target_arns();
 
     // Acquire a per-object namespace lock so that at most one worker (across all cluster
     // nodes and MRF retry goroutines) replicates this object version at a time.
@@ -2080,7 +2145,7 @@ pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, s
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return (roi.replication_state.unwrap_or_default(), false);
         }
     };
     let _obj_lock_guard = match obj_ns_lock.get_write_lock(ReplicationLockTiming::acquire_timeout()).await {
@@ -2103,7 +2168,7 @@ pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, s
                 user_agent: "Internal: [Replication]".to_string(),
                 ..Default::default()
             });
-            return;
+            return (roi.replication_state.unwrap_or_default(), false);
         }
     };
 
@@ -2179,9 +2244,12 @@ pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, s
         }
     }
 
-    let replication_status = rinfos.replication_status();
-    let new_replication_internal = rinfos.replication_status_internal();
+    let previous_state = roi.replication_state.clone().unwrap_or_default();
+    let merged_state = get_replication_state(&rinfos, &previous_state, roi.version_id.map(|v| v.to_string()));
+    let replication_status = merged_state.composite_replication_status();
+    let new_replication_internal = merged_state.replication_status_internal.clone();
     let mut object_info = roi.to_object_info();
+    let mut state_persisted = true;
 
     if roi.replication_status_internal != new_replication_internal || rinfos.replication_resynced() {
         let mut eval_metadata = HashMap::new();
@@ -2197,6 +2265,7 @@ pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, s
         match storage.put_object_metadata(&bucket, &object, &popts).await {
             Ok(u) => object_info = u,
             Err(e) => {
+                state_persisted = false;
                 // Persisting the resynced replication status failed. Don't swallow
                 // it silently — the object's on-disk status now disagrees with the
                 // resync result and needs operator visibility (backlog#799 B23).
@@ -2249,6 +2318,8 @@ pub async fn replicate_object<S: ReplicationStorage>(roi: ReplicateObjectInfo, s
             }
         }
     }
+
+    (merged_state, state_persisted)
 }
 
 trait ReplicateObjectInfoExt {
@@ -2479,6 +2550,12 @@ impl ReplicateObjectInfoExt for ReplicateObjectInfo {
         let (put_opts, is_multipart) = match replication_put_object_options(&tgt_client.storage_class, &object_info) {
             Ok((put_opts, is_mp)) => (put_opts, is_mp),
             Err(e) => {
+                // Unsupported source metadata (e.g. managed SSE) is a fail-closed
+                // condition: report FAILED so the composite status and the
+                // OperationFailedReplication event reflect that nothing reached
+                // the target, instead of leaking the optimistic Completed above.
+                rinfo.replication_status = ReplicationStatusType::Failed;
+                rinfo.error = Some(e.to_string());
                 warn!(
                     event = EVENT_RESYNC_TARGET_OPERATION_FAILED,
                     component = LOG_COMPONENT_ECSTORE,
@@ -2860,7 +2937,7 @@ impl ReplicateObjectInfoExt for ReplicateObjectInfo {
             // The target already holds a matching object (reached here only via
             // the version-id fallback ETag match above) — there is nothing to
             // copy. Record it as synced and return, instead of falling into the
-            // metadata-unsupported failure branch below, which previously left
+            // metadata propagation path below, which previously left
             // AWS-style targets permanently FAILED and never converging
             // (backlog#860 / #799 B11).
             if self.op_type == ReplicationType::ExistingObject && !tgt_client.reset_id.is_empty() {
@@ -2877,10 +2954,76 @@ impl ReplicateObjectInfoExt for ReplicateObjectInfo {
             return rinfo;
         }
 
-        // action == Metadata: metadata-only replication is not implemented.
-        if replication_action != ReplicationAction::All {
+        // The target client has no metadata-only operation. Reuse the existing
+        // object transport so metadata changes carry tags and object-lock state
+        // atomically with the source version.
+        let (put_opts, is_multipart) = match replication_put_object_options(&tgt_client.storage_class, &object_info) {
+            Ok((put_opts, is_mp)) => (put_opts, is_mp),
+            Err(e) => {
+                // Unsupported source metadata (e.g. managed SSE) is a fail-closed
+                // condition: report FAILED so the composite status and the
+                // OperationFailedReplication event reflect that nothing reached
+                // the target, instead of leaking the optimistic Completed above.
+                rinfo.replication_status = ReplicationStatusType::Failed;
+                rinfo.error = Some(e.to_string());
+                warn!(
+                    event = EVENT_RESYNC_TARGET_OPERATION_FAILED,
+                    component = LOG_COMPONENT_ECSTORE,
+                    subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
+                    bucket = %bucket,
+                    arn = %tgt_client.arn,
+                    operation = "build_put_options",
+                    error = %e,
+                    "Replication target operation failed"
+                );
+                send_local_event(EventArgs {
+                    event_name: EventName::ObjectReplicationNotTracked.to_string(),
+                    bucket_name: bucket.clone(),
+                    object: object_info,
+                    user_agent: "Internal: [Replication]".to_string(),
+                    ..Default::default()
+                });
+
+                rinfo.duration = (OffsetDateTime::now_utc() - start_time).unsigned_abs();
+                return rinfo;
+            }
+        };
+
+        let has_tagging_replication = !put_opts.user_tags.is_empty();
+        if let Some(err) = if is_multipart {
+            drop(gr);
+            let result = replicate_object_with_multipart(MultipartReplicationContext {
+                storage: storage.clone(),
+                cli: tgt_client.clone(),
+                src_bucket: &bucket,
+                dst_bucket: &tgt_client.bucket,
+                object: &object,
+                object_info: &object_info,
+                obj_opts: &obj_opts,
+                arn: &rinfo.arn,
+                put_opts,
+            })
+            .await;
+            record_proxy_request(&bucket, "PutObject", result.is_err()).await;
+            if has_tagging_replication {
+                record_proxy_request(&bucket, "PutObjectTagging", result.is_err()).await;
+            }
+            result.err()
+        } else {
+            gr.stream = wrap_with_bandwidth_monitor(gr.stream, &put_opts, &bucket, &rinfo.arn);
+            let byte_stream = async_read_to_bytestream(gr.stream);
+            let result = tgt_client
+                .put_object(&tgt_client.bucket, &object, size, byte_stream, &put_opts)
+                .await
+                .map_err(|e| std::io::Error::other(e.to_string()));
+            record_proxy_request(&bucket, "PutObject", result.is_err()).await;
+            if has_tagging_replication {
+                record_proxy_request(&bucket, "PutObjectTagging", result.is_err()).await;
+            }
+            result.err()
+        } {
             rinfo.replication_status = ReplicationStatusType::Failed;
-            rinfo.error = Some(ERR_REPLICATION_METADATA_COPY_UNSUPPORTED.to_string());
+            rinfo.error = Some(err.to_string());
             warn!(
                 event = EVENT_RESYNC_TARGET_OPERATION_FAILED,
                 component = LOG_COMPONENT_ECSTORE,
@@ -2888,98 +3031,14 @@ impl ReplicateObjectInfoExt for ReplicateObjectInfo {
                 bucket = %bucket,
                 arn = %tgt_client.arn,
                 object = %object,
-                operation = "copy_object_metadata",
-                error = ERR_REPLICATION_METADATA_COPY_UNSUPPORTED,
+                operation = "put_object",
+                error = ?err,
                 "Replication target operation failed"
             );
-            send_local_event(EventArgs {
-                event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                bucket_name: bucket.clone(),
-                object: object_info,
-                user_agent: "Internal: [Replication]".to_string(),
-                ..Default::default()
-            });
             rinfo.duration = (OffsetDateTime::now_utc() - start_time).unsigned_abs();
+
+            mark_replication_target_offline_if_needed(&tgt_client, &err).await;
             return rinfo;
-        } else {
-            let (put_opts, is_multipart) = match replication_put_object_options(&tgt_client.storage_class, &object_info) {
-                Ok((put_opts, is_mp)) => (put_opts, is_mp),
-                Err(e) => {
-                    rinfo.error = Some(e.to_string());
-                    warn!(
-                        event = EVENT_RESYNC_TARGET_OPERATION_FAILED,
-                        component = LOG_COMPONENT_ECSTORE,
-                        subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                        bucket = %bucket,
-                        arn = %tgt_client.arn,
-                        operation = "build_put_options",
-                        error = %e,
-                        "Replication target operation failed"
-                    );
-                    send_local_event(EventArgs {
-                        event_name: EventName::ObjectReplicationNotTracked.to_string(),
-                        bucket_name: bucket.clone(),
-                        object: object_info,
-                        user_agent: "Internal: [Replication]".to_string(),
-                        ..Default::default()
-                    });
-
-                    rinfo.duration = (OffsetDateTime::now_utc() - start_time).unsigned_abs();
-                    return rinfo;
-                }
-            };
-
-            let has_tagging_replication = !put_opts.user_tags.is_empty();
-            if let Some(err) = if is_multipart {
-                drop(gr);
-                let result = replicate_object_with_multipart(MultipartReplicationContext {
-                    storage: storage.clone(),
-                    cli: tgt_client.clone(),
-                    src_bucket: &bucket,
-                    dst_bucket: &tgt_client.bucket,
-                    object: &object,
-                    object_info: &object_info,
-                    obj_opts: &obj_opts,
-                    arn: &rinfo.arn,
-                    put_opts,
-                })
-                .await;
-                record_proxy_request(&bucket, "PutObject", result.is_err()).await;
-                if has_tagging_replication {
-                    record_proxy_request(&bucket, "PutObjectTagging", result.is_err()).await;
-                }
-                result.err()
-            } else {
-                gr.stream = wrap_with_bandwidth_monitor(gr.stream, &put_opts, &bucket, &rinfo.arn);
-                let byte_stream = async_read_to_bytestream(gr.stream);
-                let result = tgt_client
-                    .put_object(&tgt_client.bucket, &object, size, byte_stream, &put_opts)
-                    .await
-                    .map_err(|e| std::io::Error::other(e.to_string()));
-                record_proxy_request(&bucket, "PutObject", result.is_err()).await;
-                if has_tagging_replication {
-                    record_proxy_request(&bucket, "PutObjectTagging", result.is_err()).await;
-                }
-                result.err()
-            } {
-                rinfo.replication_status = ReplicationStatusType::Failed;
-                rinfo.error = Some(err.to_string());
-                warn!(
-                    event = EVENT_RESYNC_TARGET_OPERATION_FAILED,
-                    component = LOG_COMPONENT_ECSTORE,
-                    subsystem = LOG_SUBSYSTEM_REPLICATION_RESYNC,
-                    bucket = %bucket,
-                    arn = %tgt_client.arn,
-                    object = %object,
-                    operation = "put_object",
-                    error = ?err,
-                    "Replication target operation failed"
-                );
-                rinfo.duration = (OffsetDateTime::now_utc() - start_time).unsigned_abs();
-
-                mark_replication_target_offline_if_needed(&tgt_client, &err).await;
-                return rinfo;
-            }
         }
 
         rinfo
@@ -3165,7 +3224,7 @@ mod tests {
     use time::OffsetDateTime;
     use uuid::Uuid;
 
-    fn test_target_client(endpoint: String) -> TargetClient {
+    fn test_target_client(endpoint: String) -> Arc<TargetClient> {
         let config = aws_sdk_s3::Config::builder()
             .endpoint_url(endpoint.clone())
             .region(aws_sdk_s3::config::Region::new("us-east-1"))
@@ -3175,7 +3234,7 @@ mod tests {
             .behavior_version(aws_sdk_s3::config::BehaviorVersion::latest())
             .build();
 
-        TargetClient {
+        Arc::new(TargetClient {
             endpoint,
             credentials: None,
             bucket: "target-bucket".to_string(),
@@ -3187,7 +3246,11 @@ mod tests {
             health_check_duration: std::time::Duration::from_secs(5),
             replicate_sync: false,
             client: Arc::new(aws_sdk_s3::Client::from_conf(config)),
-        }
+        })
+    }
+
+    async fn register_test_target(target: &Arc<TargetClient>) {
+        ReplicationTargetStore::register_test_target(target).await;
     }
 
     #[test]
@@ -3203,6 +3266,7 @@ mod tests {
     async fn replication_target_network_failure_marks_target_offline() {
         let endpoint = format!("http://network-failure-{}.example:9000", Uuid::new_v4());
         let target_client = test_target_client(endpoint);
+        register_test_target(&target_client).await;
 
         assert!(!ReplicationTargetStore::target_is_offline(&target_client).await);
 
@@ -3216,6 +3280,7 @@ mod tests {
     async fn replication_target_service_failure_keeps_target_online() {
         let endpoint = format!("http://service-failure-{}.example:9000", Uuid::new_v4());
         let target_client = test_target_client(endpoint);
+        register_test_target(&target_client).await;
 
         assert!(!ReplicationTargetStore::target_is_offline(&target_client).await);
 
@@ -4002,4 +4067,35 @@ mod tests {
         assert_eq!(target_delete_version_id(Uuid::nil(), true).as_deref(), Some(NULL_VERSION_ID));
         assert_eq!(target_delete_version_id(Uuid::nil(), false), None);
     }
+
+    #[test]
+    fn delete_marker_purge_prefers_the_recorded_target_version() {
+        let source = Uuid::new_v4();
+        let arn = "arn:rustfs:replication::target:bucket";
+
+        // No recorded mapping: fall back to deriving from the source uuid.
+        assert_eq!(delete_marker_purge_version_id(None, arn, source), Some(Some(source.to_string())));
+
+        // Recorded mapping wins — a generic S3 target assigns its own id, so the
+        // derived one would purge the wrong version or nothing at all.
+        let mut state = ReplicationState::default();
+        state
+            .target_delete_marker_version_ids
+            .insert(arn.to_string(), "target-assigned-id".to_string());
+        assert_eq!(
+            delete_marker_purge_version_id(Some(&state), arn, source),
+            Some(Some("target-assigned-id".to_string()))
+        );
+
+        // A mapping recorded for a different ARN must not be reused.
+        assert_eq!(
+            delete_marker_purge_version_id(Some(&state), "arn:rustfs:replication::other:bucket", source),
+            Some(Some(source.to_string()))
+        );
+
+        // Inconsistent persisted metadata: refuse to purge rather than guess.
+        let mut corrupt = state.clone();
+        corrupt.target_delete_marker_version_ids_corrupt = true;
+        assert_eq!(delete_marker_purge_version_id(Some(&corrupt), arn, source), None);
+    }
 }

crates/ecstore/src/bucket/replication/replication_stats_boundary.rs

@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-pub use rustfs_replication::BucketStats;
 #[cfg(test)]
 pub(crate) use rustfs_replication::FailStats;
 pub(crate) use rustfs_replication::{
-    ActiveWorkerStat, BucketReplicationStat, BucketReplicationStats, InQueueMetric, ProxyMetric, ProxyStatsCache, QueueCache,
-    ReplicationMetricScope, SRMetricsSummary, XferStats,
+    ActiveWorkerStat, BucketReplicationStat, InQueueMetric, ProxyMetric, ProxyStatsCache, QueueCache, ReplicationMetricScope,
+    SRMetricsSummary, XferStats,
 };
+pub use rustfs_replication::{BucketReplicationStats, BucketStats};

crates/ecstore/src/bucket/replication/replication_storage_boundary.rs

@@ -25,7 +25,7 @@ pub(crate) use crate::storage_api_contracts::list::{
 };
 pub(crate) use crate::storage_api_contracts::namespace::NamespaceLocking as StorageNamespaceLocking;
 pub(crate) use crate::storage_api_contracts::object::{
-    DeletedObject, EcstoreObjectOperations, ObjectIO, ObjectOperations, ObjectToDelete,
+    DeletedObject, EcstoreObjectOperations, HTTPPreconditions, ObjectIO, ObjectOperations, ObjectToDelete,
 };
 pub(crate) use crate::storage_api_contracts::range::HTTPRangeSpec;
 pub(crate) use rustfs_replication::{DeletedObject as ReplicationDeletedObject, ObjectToDelete as ReplicationObjectToDelete};
@@ -105,6 +105,9 @@ pub(crate) fn deleted_object_for_replication(delete_object: DeletedObject) -> Re
         replication_state: delete_object.replication_state.as_ref().map(replication_state_from_filemeta),
         found: delete_object.found,
         force_delete: delete_object.force_delete,
+        force_delete_id: delete_object.force_delete_id,
+        force_delete_target_arns: delete_object.force_delete_target_arns,
+        force_delete_generation: delete_object.force_delete_generation,
     }
 }
 

crates/ecstore/src/bucket/replication/replication_target_boundary.rs

@@ -24,10 +24,11 @@ use rustfs_replication::{
 };
 use rustfs_utils::http::{
     AMZ_BUCKET_REPLICATION_STATUS, AMZ_OBJECT_LOCK_LEGAL_HOLD, AMZ_OBJECT_LOCK_MODE, AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE,
-    AMZ_OBJECT_TAGGING, AMZ_SERVER_SIDE_ENCRYPTION, AMZ_SERVER_SIDE_ENCRYPTION_KMS_ID, AMZ_STORAGE_CLASS, AMZ_TAG_COUNT,
-    CACHE_CONTROL, CONTENT_DISPOSITION, CONTENT_ENCODING, CONTENT_LANGUAGE, CONTENT_TYPE, HeaderExt as _,
-    SUFFIX_OBJECTLOCK_LEGALHOLD_TIMESTAMP, SUFFIX_OBJECTLOCK_RETENTION_TIMESTAMP, SUFFIX_REPLICATION_ACTUAL_OBJECT_SIZE,
-    SUFFIX_REPLICATION_SSEC_CRC, SUFFIX_TAGGING_TIMESTAMP, get_str, insert_header_map, is_internal_key,
+    AMZ_OBJECT_TAGGING, AMZ_SERVER_SIDE_ENCRYPTION, AMZ_SERVER_SIDE_ENCRYPTION_KMS_CONTEXT, AMZ_SERVER_SIDE_ENCRYPTION_KMS_ID,
+    AMZ_STORAGE_CLASS, AMZ_TAG_COUNT, CACHE_CONTROL, CONTENT_DISPOSITION, CONTENT_ENCODING, CONTENT_LANGUAGE, CONTENT_TYPE,
+    HeaderExt as _, SUFFIX_OBJECTLOCK_LEGALHOLD_TIMESTAMP, SUFFIX_OBJECTLOCK_RETENTION_TIMESTAMP,
+    SUFFIX_REPLICATION_ACTUAL_OBJECT_SIZE, SUFFIX_REPLICATION_SSEC_CRC, SUFFIX_TAGGING_TIMESTAMP, get_str, insert_header_map,
+    is_internal_key,
 };
 use time::OffsetDateTime;
 use time::format_description::well_known::Rfc3339;
@@ -79,6 +80,48 @@ static VALID_SSE_REPLICATION_HEADERS: &[(&str, &str)] = &[
 ];
 
 const ERR_REPLICATION_MANAGED_SSE_UNSUPPORTED: &str = "managed SSE replication requires target encryption support";
+const ERR_REPLICATION_ENCRYPTION_METADATA_UNSUPPORTED: &str = "replication source contains unsupported encryption metadata";
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum ReplicationSourceEncryption {
+    Plaintext,
+    SseS3,
+    SseKms,
+    SseC,
+    Unsupported,
+}
+
+fn metadata_value<'a>(metadata: &'a HashMap<String, String>, name: &str) -> Option<&'a str> {
+    metadata
+        .iter()
+        .find(|(key, _)| key.eq_ignore_ascii_case(name))
+        .map(|(_, value)| value.as_str())
+}
+
+fn classify_replication_source_encryption(metadata: &HashMap<String, String>) -> ReplicationSourceEncryption {
+    let is_ssec = replication_object_is_ssec_encrypted(metadata);
+    let sse = metadata_value(metadata, AMZ_SERVER_SIDE_ENCRYPTION);
+    let kms_key_id = metadata_value(metadata, AMZ_SERVER_SIDE_ENCRYPTION_KMS_ID);
+    let kms_context = metadata_value(metadata, AMZ_SERVER_SIDE_ENCRYPTION_KMS_CONTEXT);
+
+    if is_ssec {
+        return if sse.is_some() || kms_key_id.is_some() || kms_context.is_some() {
+            ReplicationSourceEncryption::Unsupported
+        } else {
+            ReplicationSourceEncryption::SseC
+        };
+    }
+
+    match sse.map(str::trim) {
+        None if kms_key_id.is_none() && kms_context.is_none() => ReplicationSourceEncryption::Plaintext,
+        Some(value) if value.eq_ignore_ascii_case("AES256") && kms_key_id.is_none() && kms_context.is_none() => {
+            ReplicationSourceEncryption::SseS3
+        }
+        Some(value) if value.eq_ignore_ascii_case("aws:kms") => ReplicationSourceEncryption::SseKms,
+        _ if kms_key_id.is_some() => ReplicationSourceEncryption::SseKms,
+        _ => ReplicationSourceEncryption::Unsupported,
+    }
+}
 
 pub(crate) fn replication_object_is_ssec_encrypted(user_defined: &HashMap<String, String>) -> bool {
     rustfs_replication::is_ssec_encrypted(user_defined)
@@ -95,12 +138,20 @@ impl ReplicationTargetStore {
         BucketTargetSys::get().get_remote_target_client(bucket, arn).await
     }
 
-    pub(crate) async fn target_is_offline(target_client: &TargetClient) -> bool {
-        BucketTargetSys::get().is_offline(&target_client.to_url()).await
+    pub(crate) async fn target_is_offline(target_client: &Arc<TargetClient>) -> bool {
+        BucketTargetSys::get().is_target_offline(target_client).await
     }
 
-    pub(crate) async fn mark_target_offline(target_client: &TargetClient) {
-        BucketTargetSys::get().mark_offline(&target_client.to_url()).await
+    pub(crate) async fn mark_target_offline(target_client: &Arc<TargetClient>) {
+        BucketTargetSys::get().mark_target_offline(target_client).await
+    }
+
+    #[cfg(test)]
+    pub(crate) async fn register_test_target(target_client: &Arc<TargetClient>) {
+        BucketTargetSys::get().arn_remotes_map.write().await.insert(
+            target_client.arn.clone(),
+            crate::bucket::bucket_target_sys::ArnTarget::with_client(target_client.clone()),
+        );
     }
 }
 
@@ -109,7 +160,18 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
     use rustfs_utils::http::{AMZ_CHECKSUM_TYPE, AMZ_CHECKSUM_TYPE_FULL_OBJECT};
 
     let mut meta = HashMap::new();
-    let is_ssec = replication_object_is_ssec_encrypted(&object_info.user_defined);
+    let source_encryption = classify_replication_source_encryption(&object_info.user_defined);
+    let is_ssec = matches!(source_encryption, ReplicationSourceEncryption::SseC);
+
+    match source_encryption {
+        ReplicationSourceEncryption::Plaintext | ReplicationSourceEncryption::SseC => {}
+        ReplicationSourceEncryption::SseS3 | ReplicationSourceEncryption::SseKms => {
+            return Err(Error::other(ERR_REPLICATION_MANAGED_SSE_UNSUPPORTED));
+        }
+        ReplicationSourceEncryption::Unsupported => {
+            return Err(Error::other(ERR_REPLICATION_ENCRYPTION_METADATA_UNSUPPORTED));
+        }
+    }
 
     for (key, value) in object_info.user_defined.iter() {
         let has_valid_sse_header = valid_sse_replication_header(key).is_some();
@@ -235,20 +297,6 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
             };
     }
 
-    let has_sse_s3 = object_info
-        .user_defined
-        .get(AMZ_SERVER_SIDE_ENCRYPTION)
-        .is_some_and(|value| value.eq_ignore_ascii_case("AES256"));
-    let has_sse_kms = object_info
-        .user_defined
-        .get(AMZ_SERVER_SIDE_ENCRYPTION)
-        .is_some_and(|value| value.eq_ignore_ascii_case("aws:kms"))
-        || object_info.user_defined.contains_key(AMZ_SERVER_SIDE_ENCRYPTION_KMS_ID);
-
-    if has_sse_s3 || has_sse_kms {
-        return Err(Error::other(ERR_REPLICATION_MANAGED_SSE_UNSUPPORTED));
-    }
-
     Ok((put_options, is_multipart))
 }
 
@@ -586,6 +634,46 @@ mod tests {
         assert!(get_header_map(&options.user_metadata, SUFFIX_REPLICATION_SSEC_CRC).is_some());
     }
 
+    #[test]
+    fn replication_source_encryption_classification_is_explicit_and_fail_closed() {
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::new()),
+            ReplicationSourceEncryption::Plaintext
+        );
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::from([(
+                "x-amz-server-side-encryption".to_string(),
+                "AES256".to_string()
+            )])),
+            ReplicationSourceEncryption::SseS3
+        );
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::from([(
+                "x-amz-server-side-encryption".to_string(),
+                "AWS:KMS".to_string()
+            )])),
+            ReplicationSourceEncryption::SseKms
+        );
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::from([(SSEC_ALGORITHM_HEADER.to_string(), "AES256".to_string())])),
+            ReplicationSourceEncryption::SseC
+        );
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::from([(
+                "x-amz-server-side-encryption".to_string(),
+                "unsupported-algorithm".to_string(),
+            )])),
+            ReplicationSourceEncryption::Unsupported
+        );
+        assert_eq!(
+            classify_replication_source_encryption(&HashMap::from([(
+                AMZ_SERVER_SIDE_ENCRYPTION_KMS_CONTEXT.to_string(),
+                "opaque-context".to_string(),
+            )])),
+            ReplicationSourceEncryption::Unsupported
+        );
+    }
+
     #[test]
     fn replication_put_options_rejects_sse_s3_until_target_encryption_is_supported() {
         let object_info = ObjectInfo {
@@ -619,6 +707,25 @@ mod tests {
         assert!(err.to_string().contains(ERR_REPLICATION_MANAGED_SSE_UNSUPPORTED));
     }
 
+    #[test]
+    fn replication_put_options_rejects_unknown_encryption_without_echoing_metadata() {
+        let secret_like_value = "opaque-context-that-must-not-be-logged";
+        let object_info = ObjectInfo {
+            user_defined: Arc::new(HashMap::from([
+                (AMZ_SERVER_SIDE_ENCRYPTION.to_string(), "unsupported-algorithm".to_string()),
+                (AMZ_SERVER_SIDE_ENCRYPTION_KMS_CONTEXT.to_string(), secret_like_value.to_string()),
+            ])),
+            ..Default::default()
+        };
+
+        let err = match replication_put_object_options("", &object_info) {
+            Ok(_) => panic!("unknown encryption must fail closed"),
+            Err(err) => err,
+        };
+        assert!(err.to_string().contains(ERR_REPLICATION_ENCRYPTION_METADATA_UNSUPPORTED));
+        assert!(!err.to_string().contains(secret_like_value));
+    }
+
     // T3 (#1264): the outbound replication path forwards a stored object checksum into
     // user_metadata via decrypt_checksums, which is algorithm-agnostic. This locks that
     // the AWS 2026-04 additional algorithms (XXHash3/64/128, SHA-512, MD5) are forwarded

crates/ecstore/src/bucket/target/arn.rs

@@ -56,11 +56,59 @@ impl FromStr for ARN {
         if parts.len() != 6 {
             return Err(std::io::Error::new(std::io::ErrorKind::InvalidInput, "Invalid ARN format"));
         }
+        // Display emits `arn:rustfs:{type}:{region}:{id}:{bucket}`; read the
+        // segments back in the same order so parse(display(a)) == a.
         Ok(ARN {
             arn_type: BucketTargetType::from_str(parts[2]).unwrap_or_default(),
-            id: parts[3].to_string(),
-            region: parts[4].to_string(),
+            region: parts[3].to_string(),
+            id: parts[4].to_string(),
             bucket: parts[5].to_string(),
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// Display emits `arn:rustfs:{type}:{region}:{id}:{bucket}` (madmin layout);
+    /// FromStr must read the same positions back so parse(display(a)) == a.
+    #[test]
+    fn from_str_round_trips_display_with_region_and_id() {
+        let arn = ARN::new(
+            BucketTargetType::ReplicationService,
+            "depl-123".to_string(),
+            "us-east-1".to_string(),
+            "bucket-a".to_string(),
+        );
+
+        let parsed = ARN::from_str(&arn.to_string()).expect("display output must parse");
+
+        assert_eq!(parsed.arn_type, arn.arn_type);
+        assert_eq!(parsed.region, arn.region, "region must survive display->parse round-trip");
+        assert_eq!(parsed.id, arn.id, "id must survive display->parse round-trip");
+        assert_eq!(parsed.bucket, arn.bucket);
+    }
+
+    #[test]
+    fn from_str_reads_region_then_id_in_display_order() {
+        let parsed = ARN::from_str("arn:rustfs:replication:us-east-1:depl-123:bucket-a").expect("valid ARN must parse");
+
+        assert_eq!(parsed.arn_type, BucketTargetType::ReplicationService);
+        assert_eq!(parsed.region, "us-east-1");
+        assert_eq!(parsed.id, "depl-123");
+        assert_eq!(parsed.bucket, "bucket-a");
+    }
+
+    /// RustFS commonly generates ARNs with an empty region:
+    /// `arn:rustfs:replication::<deployment_id>:<bucket>`.
+    #[test]
+    fn from_str_handles_empty_region_segment() {
+        let parsed = ARN::from_str("arn:rustfs:replication::depl-123:bucket-a").expect("valid ARN must parse");
+
+        assert_eq!(parsed.arn_type, BucketTargetType::ReplicationService);
+        assert_eq!(parsed.region, "", "region segment is empty in this form");
+        assert_eq!(parsed.id, "depl-123");
+        assert_eq!(parsed.bucket, "bucket-a");
+    }
+}

crates/ecstore/src/bucket/target/bucket_target.rs

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 use crate::error::{Error, Result};
+use jiff::Timestamp;
 use rmp_serde::Serializer as rmpSerializer;
 use serde::{Deserialize, Serialize};
 use std::{
@@ -32,7 +33,7 @@ pub struct Credentials {
     #[serde(rename = "secretKey")]
     pub secret_key: String,
     pub session_token: Option<String>,
-    pub expiration: Option<chrono::DateTime<chrono::Utc>>,
+    pub expiration: Option<Timestamp>,
 }
 
 impl Credentials {
@@ -93,6 +94,21 @@ mod duration_milliseconds {
     }
 }
 
+/// Defensive decode for the two integer wire encodings of these duration
+/// fields: RustFS persists (and legacy RustFS clients sent) plain seconds,
+/// while Go `time.Duration` JSON — madmin/mc requests and MinIO-written
+/// bucket-targets metadata — is nanoseconds. No meaningful interval lies
+/// between 10^7 seconds (~115 days) and 10^7 nanoseconds (10ms), so the
+/// magnitude disambiguates the unit.
+pub fn duration_from_secs_or_nanos(value: u64) -> Duration {
+    const NANOS_THRESHOLD: u64 = 10_000_000;
+    if value < NANOS_THRESHOLD {
+        Duration::from_secs(value)
+    } else {
+        Duration::from_nanos(value)
+    }
+}
+
 mod duration_seconds {
     use serde::{Deserialize, Deserializer, Serializer};
     use std::time::Duration;
@@ -108,8 +124,8 @@ mod duration_seconds {
     where
         D: Deserializer<'de>,
     {
-        let secs = u64::deserialize(deserializer)?;
-        Ok(Duration::from_secs(secs))
+        let value = u64::deserialize(deserializer)?;
+        Ok(super::duration_from_secs_or_nanos(value))
     }
 }
 
@@ -408,7 +424,11 @@ mod tests {
         assert_eq!(credentials.access_key, "test-access-key");
         assert_eq!(credentials.secret_key, "test-secret-key");
         assert_eq!(credentials.session_token, Some("test-session-token".to_string()));
-        assert!(credentials.expiration.is_some());
+        assert_eq!(
+            serde_json::to_value(credentials.expiration.expect("expiration should parse"))
+                .expect("expiration should serialize to JSON"),
+            serde_json::json!("2024-12-31T23:59:59Z")
+        );
 
         // Verify latency statistics
         assert_eq!(target.latency.curr, Duration::from_millis(100));
@@ -484,6 +504,29 @@ mod tests {
         assert_eq!(original.offline_count, deserialized.offline_count);
     }
 
+    #[test]
+    fn bucket_target_reads_go_nanosecond_durations_defensively() {
+        // MinIO-written bucket-targets metadata and madmin clients encode
+        // these fields as Go `time.Duration` nanoseconds; RustFS has always
+        // persisted seconds. Both encodings must decode to the same interval.
+        let target: BucketTarget = serde_json::from_value(serde_json::json!({
+            "endpoint": "localhost:9000",
+            "targetbucket": "target",
+            "type": "replication",
+            "healthCheckDuration": 60_000_000_000u64,
+            "totalDowntime": 90_000_000_000u64
+        }))
+        .expect("nanosecond durations should deserialize");
+
+        assert_eq!(target.health_check_duration, Duration::from_secs(60));
+        assert_eq!(target.total_downtime, Duration::from_secs(90));
+
+        // The persisted wire format stays seconds for existing RustFS readers.
+        let value = serde_json::to_value(&target).expect("target should serialize");
+        assert_eq!(value["healthCheckDuration"], 60);
+        assert_eq!(value["totalDowntime"], 90);
+    }
+
     #[test]
     fn test_bucket_target_debug_redacts_credentials() {
         let target = BucketTarget {
@@ -530,6 +573,50 @@ mod tests {
         assert!(redacted_json.contains(r#""session_token":null"#));
     }
 
+    #[test]
+    fn historical_bucket_target_options_remain_readable() {
+        let target: BucketTarget = serde_json::from_value(serde_json::json!({
+            "endpoint": "legacy.example:9000",
+            "credentials": {
+                "accessKey": "legacy-access",
+                "secretKey": "legacy-secret",
+                "session_token": "legacy-session-token",
+                "expiration": "2024-12-31T23:59:59Z"
+            },
+            "targetbucket": "legacy-bucket",
+            "api": "s3v2",
+            "healthCheckDuration": 30,
+            "disableProxy": true,
+            "edge": true,
+            "edgeSyncBeforeExpiry": true,
+            "type": "replication"
+        }))
+        .expect("historical remote target should remain readable");
+
+        assert_eq!(target.api, "s3v2");
+        assert_eq!(target.health_check_duration, Duration::from_secs(30));
+        assert!(target.disable_proxy);
+        assert!(target.edge);
+        assert!(target.edge_sync_before_expiry);
+        assert_eq!(
+            target
+                .credentials
+                .as_ref()
+                .and_then(|credentials| credentials.session_token.as_deref()),
+            Some("legacy-session-token")
+        );
+        assert_eq!(
+            target
+                .credentials
+                .as_ref()
+                .and_then(|credentials| credentials.expiration)
+                .map(serde_json::to_value)
+                .transpose()
+                .expect("expiration should serialize to JSON"),
+            Some(serde_json::json!("2024-12-31T23:59:59Z"))
+        );
+    }
+
     #[test]
     fn test_bucket_target_type_json_deserialize() {
         // Test BucketTargetType JSON deserialization
@@ -568,7 +655,11 @@ mod tests {
             credentials.session_token,
             Some("AQoEXAMPLEH4aoAH0gNCAPyJxz4BlCFFxWNE1OPTgk5TthT".to_string())
         );
-        assert!(credentials.expiration.is_some());
+        assert_eq!(
+            serde_json::to_value(credentials.expiration.expect("expiration should parse"))
+                .expect("expiration should serialize to JSON"),
+            serde_json::json!("2024-12-31T23:59:59Z")
+        );
     }
 
     #[test]

crates/ecstore/src/bucket/utils.rs

@@ -269,6 +269,32 @@ pub fn check_del_obj_args(bucket: &str, object: &str) -> Result<()> {
     check_bucket_and_object_names(bucket, object)
 }
 
+/// Filesystem `NAME_MAX`: every object-key path segment becomes one on-disk
+/// directory entry, so a longer segment can never be stored and previously
+/// escaped as an `ENAMETOOLONG` io error → `InternalError` 500 (rustfs#5785).
+const MAX_OBJECT_KEY_SEGMENT_BYTES: usize = 255;
+
+/// Reject object keys whose on-disk directory names would exceed `NAME_MAX`.
+///
+/// Middle segments map to their raw bytes; the final segment of a
+/// directory-object key (trailing `/`) is stored with the `__XLDIR__` suffix
+/// appended, shrinking its budget accordingly.
+fn object_key_segments_fit_on_disk(object: &str) -> bool {
+    let trailing_dir = object.ends_with('/');
+    let segments: Vec<&str> = object.split('/').collect();
+    let last_nonempty = segments.iter().rposition(|s| !s.is_empty());
+    for (index, segment) in segments.iter().enumerate() {
+        let mut budget = MAX_OBJECT_KEY_SEGMENT_BYTES;
+        if trailing_dir && Some(index) == last_nonempty {
+            budget = budget.saturating_sub(rustfs_utils::path::GLOBAL_DIR_SUFFIX.len());
+        }
+        if segment.len() > budget {
+            return false;
+        }
+    }
+    true
+}
+
 pub fn check_bucket_and_object_names(bucket: &str, object: &str) -> Result<()> {
     if !is_meta_bucketname(bucket) && check_valid_bucket_name_strict(bucket).is_err() {
         return Err(StorageError::BucketNameInvalid(bucket.to_string()));
@@ -282,6 +308,10 @@ pub fn check_bucket_and_object_names(bucket: &str, object: &str) -> Result<()> {
         return Err(StorageError::ObjectNameInvalid(bucket.to_string(), object.to_string()));
     }
 
+    if !object_key_segments_fit_on_disk(object) {
+        return Err(StorageError::ObjectNameInvalid(bucket.to_string(), object.to_string()));
+    }
+
     // if cfg!(target_os = "windows") && object.contains('\\') {
     //     return Err(StorageError::ObjectNameInvalid(bucket.to_string(), object.to_string()));
     // }
@@ -379,6 +409,14 @@ pub fn check_put_object_args(bucket: &str, object: &str) -> Result<()> {
         return Err(StorageError::ObjectNameInvalid(bucket.to_string(), object.to_string()));
     }
 
+    // The write path validates arguments here rather than through
+    // check_bucket_and_object_names, so the on-disk segment budget has to be
+    // enforced in both places or an over-NAME_MAX key still reaches the disk
+    // layer and escapes as ENAMETOOLONG → InternalError 500 (rustfs#5785).
+    if !object_key_segments_fit_on_disk(object) {
+        return Err(StorageError::ObjectNameInvalid(bucket.to_string(), object.to_string()));
+    }
+
     Ok(())
 }
 
@@ -387,6 +425,62 @@ mod tests {
     use super::*;
     use proptest::prelude::*;
 
+    /// rustfs#5785: keys whose path segments exceed the on-disk NAME_MAX
+    /// budget must be rejected up front as ObjectNameInvalid (4xx), not leak
+    /// ENAMETOOLONG as InternalError 500 from the disk layer.
+    #[test]
+    fn object_key_segment_name_max_budget() {
+        // 255-byte single segment: exactly at the on-disk limit.
+        assert!(check_bucket_and_object_names("bucket", &"a".repeat(255)).is_ok());
+        // 256 bytes: one over.
+        assert!(matches!(
+            check_bucket_and_object_names("bucket", &"a".repeat(256)),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+        // Long keys are fine as long as every segment fits.
+        let segmented = ["b".repeat(200), "c".repeat(200), "d".repeat(200)].join("/");
+        assert!(check_bucket_and_object_names("bucket", &segmented).is_ok());
+        // The budget counts bytes, not characters (100 CJK chars = 300 bytes).
+        assert!(matches!(
+            check_bucket_and_object_names("bucket", &"中".repeat(100)),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+        assert!(check_bucket_and_object_names("bucket", &"中".repeat(85)).is_ok());
+        // Directory-object keys spend GLOBAL_DIR_SUFFIX bytes of the final
+        // segment's budget on the on-disk __XLDIR__ encoding.
+        let dir_budget = 255 - rustfs_utils::path::GLOBAL_DIR_SUFFIX.len();
+        assert!(check_bucket_and_object_names("bucket", &format!("{}/", "e".repeat(dir_budget))).is_ok());
+        assert!(matches!(
+            check_bucket_and_object_names("bucket", &format!("{}/", "e".repeat(dir_budget + 1))),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+    }
+
+    /// rustfs#5785 follow-up: the write path validates through
+    /// check_put_object_args, not check_bucket_and_object_names, so the same
+    /// budget has to hold there — otherwise an over-NAME_MAX PUT still reached
+    /// the disk layer and came back as InternalError 500.
+    #[test]
+    fn put_object_args_enforce_the_same_segment_budget() {
+        assert!(check_put_object_args("bucket", &"a".repeat(255)).is_ok());
+        assert!(matches!(
+            check_put_object_args("bucket", &"a".repeat(256)),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+        assert!(matches!(
+            check_put_object_args("bucket", &"\u{4e2d}".repeat(100)),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+        let segmented = ["b".repeat(200), "c".repeat(200), "d".repeat(200)].join("/");
+        assert!(check_put_object_args("bucket", &segmented).is_ok());
+        let dir_budget = 255 - rustfs_utils::path::GLOBAL_DIR_SUFFIX.len();
+        assert!(check_put_object_args("bucket", &format!("{}/", "e".repeat(dir_budget))).is_ok());
+        assert!(matches!(
+            check_put_object_args("bucket", &format!("{}/", "e".repeat(dir_budget + 1))),
+            Err(StorageError::ObjectNameInvalid(_, _))
+        ));
+    }
+
     // Test validation functions
     #[test]
     fn test_is_valid_object_name() {

crates/ecstore/src/client/object_handlers_common.rs

@@ -21,17 +21,22 @@ const EVENT_LIFECYCLE_CLEANUP_SKIPPED: &str = "lifecycle_cleanup_skipped";
 const EVENT_LIFECYCLE_CLEANUP_FAILED: &str = "lifecycle_cleanup_failed";
 
 use crate::bucket::lifecycle::lifecycle;
-use crate::bucket::replication::{ReplicationLifecycleBridge, ReplicationState, replication_state_to_filemeta};
-use crate::bucket::versioning::VersioningApi;
-use crate::bucket::versioning_sys::BucketVersioningSys;
+use crate::bucket::replication::{ReplicationLifecycleBridge, ReplicationObjectBridge};
 use crate::object_api::ObjectOptions;
 use crate::storage_api_contracts::object::{ObjectOperations as _, ObjectToDelete};
 use crate::store::ECStore;
 use rustfs_lock::MAX_DELETE_LIST;
+use uuid::Uuid;
 
-pub async fn delete_object_versions(api: &Arc<ECStore>, bucket: &str, to_del: &[ObjectToDelete], _lc_event: lifecycle::Event) {
-    let version_suspended = match BucketVersioningSys::get(bucket).await {
-        Ok(vc) => vc.suspended(),
+pub async fn delete_object_versions(
+    api: &Arc<ECStore>,
+    bucket: &str,
+    to_del: &[ObjectToDelete],
+    _lc_event: lifecycle::Event,
+    bucket_incarnation_id: Uuid,
+) {
+    let delete_config_snapshot = match ReplicationObjectBridge::delete_request_config(api, bucket).await {
+        Ok(snapshot) => Arc::new(snapshot),
         Err(err) => {
             debug!(
                 event = EVENT_LIFECYCLE_CLEANUP_SKIPPED,
@@ -39,7 +44,7 @@ pub async fn delete_object_versions(api: &Arc<ECStore>, bucket: &str, to_del: &[
                 subsystem = LOG_SUBSYSTEM_LIFECYCLE,
                 bucket,
                 error = ?err,
-                reason = "versioning_config_unavailable",
+                reason = "delete_config_snapshot_unavailable",
                 "Skipped lifecycle noncurrent version cleanup"
             );
             return;
@@ -55,45 +60,13 @@ pub async fn delete_object_versions(api: &Arc<ECStore>, bucket: &str, to_del: &[
             remaining = &[];
         }
 
-        let mut replication_candidates: Vec<Option<ReplicationState>> = Vec::with_capacity(to_del.len());
-        for object in to_del.iter() {
-            let version_id = object.version_id.map(|vid| vid.to_string());
-            let opts = ObjectOptions {
-                version_id: version_id.clone(),
-                versioned: true,
-                version_suspended,
-                ..Default::default()
-            };
-            let candidate = match api.get_object_info(bucket, &object.object_name, &opts).await {
-                Ok(info) => {
-                    let dsc = ReplicationLifecycleBridge::check_delete_replication(bucket, object, &info, &opts).await;
-                    dsc.replicate_any()
-                        .then(|| ReplicationLifecycleBridge::version_delete_replication_state(&dsc))
-                }
-                Err(err) => {
-                    debug!(
-                        event = EVENT_LIFECYCLE_CLEANUP_SKIPPED,
-                        component = LOG_COMPONENT_ECSTORE,
-                        subsystem = LOG_SUBSYSTEM_LIFECYCLE,
-                        bucket,
-                        object = %object.object_name,
-                        version_id = ?version_id,
-                        error = ?err,
-                        reason = "object_info_unavailable",
-                        "Skipped lifecycle delete replication scheduling"
-                    );
-                    None
-                }
-            };
-            replication_candidates.push(candidate);
-        }
-
         let (mut deleted_objs, errors) = api
             .delete_objects(
                 bucket,
                 to_del.to_vec(),
                 ObjectOptions {
-                    version_suspended,
+                    delete_replication_config_snapshot: Some(Arc::clone(&delete_config_snapshot)),
+                    expected_bucket_incarnation_id: Some(bucket_incarnation_id),
                     ..Default::default()
                 },
             )
@@ -108,10 +81,9 @@ pub async fn delete_object_versions(api: &Arc<ECStore>, bucket: &str, to_del: &[
             if let Some(target) = to_del.get(i) {
                 crate::object_api::notify_object_mutation(bucket, &target.object_name).await;
             }
-            let Some(replication_state) = replication_candidates.get(i).and_then(|c| c.clone()) else {
+            if deleted_obj.replication_state.is_none() {
                 continue;
-            };
-            deleted_obj.replication_state = Some(replication_state_to_filemeta(&replication_state));
+            }
             ReplicationLifecycleBridge::schedule_delete(bucket.to_string(), deleted_obj.clone()).await;
         }
 

crates/ecstore/src/cluster/rpc/http_auth.rs

@@ -36,15 +36,20 @@ use http::{HeaderMap, HeaderValue, Method, Uri};
 #[cfg(test)]
 use rustfs_credentials::{DEFAULT_SECRET_KEY, RPC_SECRET_REQUIRED_MESSAGE};
 use rustfs_credentials::{RPC_SECRET_REQUIRED_OPERATOR_MESSAGE, try_get_rpc_token};
-use rustfs_io_metrics::internode_metrics::global_internode_metrics;
+use rustfs_io_metrics::internode_metrics::{
+    INTERNODE_OPERATION_GRPC_OTHER, INTERNODE_OPERATION_GRPC_READ_ALL, INTERNODE_OPERATION_GRPC_READ_MULTIPLE,
+    INTERNODE_OPERATION_GRPC_WRITE_ALL, INTERNODE_TRANSPORT_BACKEND_GRPC, global_internode_metrics,
+};
+use rustfs_object_data_cache::{MemoryBasis, resolve_effective_memory};
 use rustfs_utils::get_env_bool;
 use sha2::Digest as _;
 use sha2::Sha256;
 use std::collections::{HashSet, VecDeque};
 use std::sync::{LazyLock, Mutex, Once};
+use std::thread;
 use std::time::{Duration, Instant};
 use time::OffsetDateTime;
-use tracing::error;
+use tracing::{error, info, warn};
 use uuid::Uuid;
 
 type HmacSha256 = Hmac<Sha256>;
@@ -70,6 +75,11 @@ const UNSIGNED_PAYLOAD: &str = "UNSIGNED-PAYLOAD";
 const UNSIGNED_PAYLOAD_NONCE: &str = "unsigned";
 const SIGNATURE_VALID_DURATION: i64 = 300; // 5 minutes
 const REPLAY_CACHE_RETENTION: Duration = Duration::from_secs(601);
+const REPLAY_CACHE_RETENTION_SECS: usize = 601;
+const REPLAY_CACHE_ENTRY_BYTES_ESTIMATE: u64 = 128;
+const REPLAY_CACHE_AUTO_MEMORY_PERCENT: u64 = 8;
+const REPLAY_CACHE_AUTO_RPC_RPS_PER_CPU: usize = 2048;
+const REPLAY_CACHE_AUTO_MAX_CAPACITY: usize = 16_777_216;
 const NS_SCANNER_CAPABILITY_AUTH_DOMAIN: &[u8] = b"rustfs-ns-scanner-capability-v3";
 pub const TONIC_RPC_PREFIX: &str = "/node_service.NodeService";
 static INTERNODE_RPC_SIGNATURE_STRICT: LazyLock<bool> = LazyLock::new(|| {
@@ -91,18 +101,211 @@ static INTERNODE_RPC_REPLAY_SCOPE_STRICT: LazyLock<bool> = LazyLock::new(|| {
     )
 });
 // Sized for peak legitimate authenticated RPC RPS x the retention window once replay scope is
-// active; overflow fails closed and increments the replay-cache overflow counter. Clamped to at
-// least 1 so a misconfigured zero cannot disable replay protection by rejecting every request.
-static REPLAY_CACHE_CAPACITY: LazyLock<usize> = LazyLock::new(|| {
-    rustfs_utils::get_env_usize(
-        rustfs_config::ENV_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
-        rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
-    )
-    .max(1)
-});
+// active; overflow fails closed and increments the replay-cache overflow counter. Explicit operator
+// values and auto-sizing are both floored at the historical default so under-sizing cannot turn
+// legitimate high-throughput traffic into `No valid auth token` failures.
+static REPLAY_CACHE_CAPACITY: LazyLock<usize> = LazyLock::new(resolve_replay_cache_capacity);
 static RPC_SECRET_RESOLUTION_LOG_ONCE: Once = Once::new();
 static RPC_BOOT_EPOCH: LazyLock<Uuid> = LazyLock::new(Uuid::new_v4);
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum ReplayCacheCapacitySource {
+    Env,
+    EnvClampedToDefault,
+    Auto,
+    AutoClampedToDefault,
+    AutoInvalidEnv,
+    AutoInvalidEnvClampedToDefault,
+}
+
+impl ReplayCacheCapacitySource {
+    fn as_str(self) -> &'static str {
+        match self {
+            Self::Env => "env",
+            Self::EnvClampedToDefault => "env_clamped_to_default",
+            Self::Auto => "auto",
+            Self::AutoClampedToDefault => "auto_clamped_to_default",
+            Self::AutoInvalidEnv => "auto_invalid_env",
+            Self::AutoInvalidEnvClampedToDefault => "auto_invalid_env_clamped_to_default",
+        }
+    }
+
+    fn is_env_clamped(self) -> bool {
+        matches!(self, Self::EnvClampedToDefault)
+    }
+
+    fn is_env(self) -> bool {
+        matches!(self, Self::Env)
+    }
+
+    fn is_invalid_env(self) -> bool {
+        matches!(self, Self::AutoInvalidEnv | Self::AutoInvalidEnvClampedToDefault)
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+struct ReplayCacheCapacityDecision {
+    capacity: usize,
+    source: ReplayCacheCapacitySource,
+    cpu_count: usize,
+    memory_limit_bytes: Option<u64>,
+    memory_basis: Option<MemoryBasis>,
+    memory_based_capacity: usize,
+    cpu_based_capacity: usize,
+}
+
+fn saturating_usize_from_u64(value: u64) -> usize {
+    usize::try_from(value).unwrap_or(usize::MAX)
+}
+
+fn replay_cache_capacity_from_resources(cpu_count: usize, memory_limit_bytes: Option<u64>) -> (usize, usize, usize) {
+    let cpu_count = cpu_count.max(1);
+    let cpu_based_capacity = cpu_count
+        .saturating_mul(REPLAY_CACHE_AUTO_RPC_RPS_PER_CPU)
+        .saturating_mul(REPLAY_CACHE_RETENTION_SECS);
+    let memory_based_capacity = memory_limit_bytes
+        .map(|bytes| {
+            let budget = bytes.saturating_mul(REPLAY_CACHE_AUTO_MEMORY_PERCENT) / 100;
+            saturating_usize_from_u64(budget / REPLAY_CACHE_ENTRY_BYTES_ESTIMATE)
+        })
+        .unwrap_or(REPLAY_CACHE_AUTO_MAX_CAPACITY);
+    let capacity = memory_based_capacity
+        .min(cpu_based_capacity)
+        .clamp(rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY, REPLAY_CACHE_AUTO_MAX_CAPACITY);
+    (capacity, memory_based_capacity, cpu_based_capacity)
+}
+
+fn replay_cache_capacity_decision(
+    env: rustfs_utils::EnvParseOutcome<usize>,
+    cpu_count: usize,
+    memory_limit_bytes: Option<u64>,
+    memory_basis: Option<MemoryBasis>,
+) -> ReplayCacheCapacityDecision {
+    let default = rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY;
+    match env {
+        rustfs_utils::EnvParseOutcome::Parsed(configured) => {
+            let capacity = configured.max(default);
+            let source = if configured < default {
+                ReplayCacheCapacitySource::EnvClampedToDefault
+            } else {
+                ReplayCacheCapacitySource::Env
+            };
+            ReplayCacheCapacityDecision {
+                capacity,
+                source,
+                cpu_count: cpu_count.max(1),
+                memory_limit_bytes,
+                memory_basis,
+                memory_based_capacity: 0,
+                cpu_based_capacity: 0,
+            }
+        }
+        rustfs_utils::EnvParseOutcome::Absent | rustfs_utils::EnvParseOutcome::Invalid => {
+            let (capacity, memory_based_capacity, cpu_based_capacity) =
+                replay_cache_capacity_from_resources(cpu_count, memory_limit_bytes);
+            let clamped_to_default = capacity == default && memory_based_capacity.min(cpu_based_capacity) < default;
+            let invalid_env = matches!(env, rustfs_utils::EnvParseOutcome::Invalid);
+            let source = match (invalid_env, clamped_to_default) {
+                (true, true) => ReplayCacheCapacitySource::AutoInvalidEnvClampedToDefault,
+                (true, false) => ReplayCacheCapacitySource::AutoInvalidEnv,
+                (false, true) => ReplayCacheCapacitySource::AutoClampedToDefault,
+                (false, false) => ReplayCacheCapacitySource::Auto,
+            };
+            ReplayCacheCapacityDecision {
+                capacity,
+                source,
+                cpu_count: cpu_count.max(1),
+                memory_limit_bytes,
+                memory_basis,
+                memory_based_capacity,
+                cpu_based_capacity,
+            }
+        }
+    }
+}
+
+fn detected_replay_cache_resources() -> (usize, Option<u64>, Option<MemoryBasis>) {
+    let cpu_count = thread::available_parallelism().map(usize::from).unwrap_or(1).max(1);
+    let memory = resolve_effective_memory();
+    let memory_limit_bytes = (memory.total_bytes > 0).then_some(memory.total_bytes);
+    (cpu_count, memory_limit_bytes, Some(memory.basis))
+}
+
+fn log_replay_cache_capacity_decision(decision: ReplayCacheCapacityDecision) {
+    let source = decision.source.as_str();
+    if decision.source.is_env_clamped() {
+        warn!(
+            event = "internode_rpc_replay_cache_capacity_resolved",
+            component = "ecstore",
+            subsystem = "rpc_auth",
+            capacity = decision.capacity,
+            source,
+            default_capacity = rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
+            env = rustfs_config::ENV_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
+            "internode rpc replay cache capacity clamped to default"
+        );
+        return;
+    }
+    if decision.source.is_env() {
+        info!(
+            event = "internode_rpc_replay_cache_capacity_resolved",
+            component = "ecstore",
+            subsystem = "rpc_auth",
+            capacity = decision.capacity,
+            source,
+            default_capacity = rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
+            env = rustfs_config::ENV_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
+            "internode rpc replay cache capacity resolved from env"
+        );
+        return;
+    }
+    if decision.source.is_invalid_env() {
+        warn!(
+            event = "internode_rpc_replay_cache_capacity_resolved",
+            component = "ecstore",
+            subsystem = "rpc_auth",
+            capacity = decision.capacity,
+            source,
+            cpu_count = decision.cpu_count,
+            memory_limit_bytes = decision.memory_limit_bytes,
+            memory_basis = decision.memory_basis.map(MemoryBasis::as_str),
+            memory_based_capacity = decision.memory_based_capacity,
+            cpu_based_capacity = decision.cpu_based_capacity,
+            auto_max_capacity = REPLAY_CACHE_AUTO_MAX_CAPACITY,
+            env = rustfs_config::ENV_INTERNODE_RPC_REPLAY_CACHE_CAPACITY,
+            "internode rpc replay cache capacity auto-sized after invalid env"
+        );
+        return;
+    }
+    info!(
+        event = "internode_rpc_replay_cache_capacity_resolved",
+        component = "ecstore",
+        subsystem = "rpc_auth",
+        capacity = decision.capacity,
+        source,
+        cpu_count = decision.cpu_count,
+        memory_limit_bytes = decision.memory_limit_bytes,
+        memory_basis = decision.memory_basis.map(MemoryBasis::as_str),
+        memory_based_capacity = decision.memory_based_capacity,
+        cpu_based_capacity = decision.cpu_based_capacity,
+        auto_max_capacity = REPLAY_CACHE_AUTO_MAX_CAPACITY,
+        "internode rpc replay cache capacity resolved"
+    );
+}
+
+fn resolve_replay_cache_capacity() -> usize {
+    let (cpu_count, memory_limit_bytes, memory_basis) = detected_replay_cache_resources();
+    let decision = replay_cache_capacity_decision(
+        rustfs_utils::get_env_parse_outcome(rustfs_config::ENV_INTERNODE_RPC_REPLAY_CACHE_CAPACITY),
+        cpu_count,
+        memory_limit_bytes,
+        memory_basis,
+    );
+    global_internode_metrics().record_replay_cache_state(0, decision.capacity);
+    log_replay_cache_capacity_decision(decision);
+    decision.capacity
+}
+
 #[derive(Default)]
 struct RpcNonceCache {
     nonces: HashSet<Uuid>,
@@ -110,8 +313,50 @@ struct RpcNonceCache {
     max_wall_time: i64,
 }
 
+#[derive(Clone, Copy)]
+struct RpcReplayCacheMetricScope<'a> {
+    operation: &'static str,
+    backend: &'static str,
+    rpc_path: &'a str,
+}
+
+#[derive(Clone, Copy)]
+struct RpcNonceRecord<'a> {
+    nonce: Uuid,
+    signed_at: i64,
+    now: Instant,
+    wall_time: i64,
+    expires_at: Instant,
+    capacity: usize,
+    metric_scope: RpcReplayCacheMetricScope<'a>,
+}
+
+struct RpcNonceCacheMetrics<'a> {
+    expired: usize,
+    entries: usize,
+    capacity: usize,
+    overflow_scope: Option<RpcReplayCacheMetricScope<'a>>,
+}
+
+fn publish_nonce_cache_metrics(metrics: Option<RpcNonceCacheMetrics<'_>>) {
+    let Some(metrics) = metrics else {
+        return;
+    };
+    let internode_metrics = global_internode_metrics();
+    internode_metrics.record_replay_cache_evictions("expired", metrics.expired);
+    internode_metrics.record_replay_cache_state(metrics.entries, metrics.capacity);
+    if let Some(scope) = metrics.overflow_scope {
+        internode_metrics.record_replay_cache_overflow_for_operation_and_backend_path(
+            scope.operation,
+            scope.backend,
+            scope.rpc_path,
+        );
+    }
+}
+
 impl RpcNonceCache {
-    fn remove_expired(&mut self, now: Instant, wall_time: i64) {
+    fn remove_expired(&mut self, now: Instant, wall_time: i64) -> usize {
+        let mut removed = 0;
         while matches!(
             self.expirations.front(),
             Some((expires_at, valid_until, _)) if *expires_at < now && *valid_until < wall_time
@@ -120,37 +365,48 @@ impl RpcNonceCache {
                 break;
             };
             self.nonces.remove(&nonce);
+            removed += 1;
         }
+        removed
     }
 
-    fn check_and_record(
-        &mut self,
-        nonce: Uuid,
-        signed_at: i64,
-        now: Instant,
-        wall_time: i64,
-        expires_at: Instant,
-        capacity: usize,
-    ) -> std::io::Result<()> {
-        self.max_wall_time = self.max_wall_time.max(wall_time);
-        if self.max_wall_time.saturating_sub(signed_at) > SIGNATURE_VALID_DURATION {
-            return Err(std::io::Error::other("RPC request timestamp expired after clock regression"));
+    fn check_and_record<'a>(&mut self, record: RpcNonceRecord<'a>) -> (std::io::Result<()>, Option<RpcNonceCacheMetrics<'a>>) {
+        self.max_wall_time = self.max_wall_time.max(record.wall_time);
+        if self.max_wall_time.saturating_sub(record.signed_at) > SIGNATURE_VALID_DURATION {
+            return (Err(std::io::Error::other("RPC request timestamp expired after clock regression")), None);
         }
-        self.remove_expired(now, self.max_wall_time);
-        if self.nonces.contains(&nonce) {
-            return Err(std::io::Error::other("RPC request replay detected"));
+        let expired = self.remove_expired(record.now, self.max_wall_time);
+        let metrics = RpcNonceCacheMetrics {
+            expired,
+            entries: self.nonces.len(),
+            capacity: record.capacity,
+            overflow_scope: None,
+        };
+        if self.nonces.contains(&record.nonce) {
+            return (Err(std::io::Error::other("RPC request replay detected")), Some(metrics));
         }
-        if self.nonces.len() >= capacity {
+        if self.nonces.len() >= record.capacity {
             // Fail closed and alert: only legitimately signed traffic can fill the cache, so a
             // sustained overflow means RUSTFS_INTERNODE_RPC_REPLAY_CACHE_CAPACITY is undersized
             // for this node's peak mutation rate and writes are being refused.
-            global_internode_metrics().record_replay_cache_overflow();
-            return Err(std::io::Error::other("RPC replay cache capacity exceeded"));
+            return (
+                Err(std::io::Error::other("RPC replay cache capacity exceeded")),
+                Some(RpcNonceCacheMetrics {
+                    overflow_scope: Some(record.metric_scope),
+                    ..metrics
+                }),
+            );
         }
-        self.nonces.insert(nonce);
+        self.nonces.insert(record.nonce);
         self.expirations
-            .push_back((expires_at, signed_at.saturating_add(SIGNATURE_VALID_DURATION), nonce));
-        Ok(())
+            .push_back((record.expires_at, record.signed_at.saturating_add(SIGNATURE_VALID_DURATION), record.nonce));
+        (
+            Ok(()),
+            Some(RpcNonceCacheMetrics {
+                entries: self.nonces.len(),
+                ..metrics
+            }),
+        )
     }
 }
 
@@ -541,18 +797,43 @@ fn check_timestamp(timestamp: i64) -> std::io::Result<()> {
     Ok(())
 }
 
-fn check_and_record_nonce(nonce: Uuid, signed_at: i64) -> std::io::Result<()> {
+fn tonic_rpc_metric_operation(path: &str) -> &'static str {
+    match parse_tonic_rpc_path(path).ok().map(|(_, rpc_method)| rpc_method) {
+        Some("ReadAll") => INTERNODE_OPERATION_GRPC_READ_ALL,
+        Some("ReadMultiple") => INTERNODE_OPERATION_GRPC_READ_MULTIPLE,
+        Some("WriteAll") => INTERNODE_OPERATION_GRPC_WRITE_ALL,
+        _ => INTERNODE_OPERATION_GRPC_OTHER,
+    }
+}
+
+fn check_and_record_nonce(nonce: Uuid, signed_at: i64, rpc_path: &str) -> std::io::Result<()> {
     let wall_time = OffsetDateTime::now_utc().unix_timestamp();
-    let mut cache = LOCAL_RPC_NONCE_CACHE
-        .lock()
-        .map_err(|_| std::io::Error::other("RPC replay cache unavailable"))?;
-    // Take the monotonic timestamp after acquiring the lock so expiration
-    // entries remain ordered by the same serialization point as insertion.
-    let now = Instant::now();
-    let expires_at = now
-        .checked_add(REPLAY_CACHE_RETENTION)
-        .ok_or_else(|| std::io::Error::other("RPC replay expiry overflow"))?;
-    cache.check_and_record(nonce, signed_at, now, wall_time, expires_at, *REPLAY_CACHE_CAPACITY)
+    let (result, metrics) = {
+        let mut cache = LOCAL_RPC_NONCE_CACHE
+            .lock()
+            .map_err(|_| std::io::Error::other("RPC replay cache unavailable"))?;
+        // Take the monotonic timestamp after acquiring the lock so expiration
+        // entries remain ordered by the same serialization point as insertion.
+        let now = Instant::now();
+        let expires_at = now
+            .checked_add(REPLAY_CACHE_RETENTION)
+            .ok_or_else(|| std::io::Error::other("RPC replay expiry overflow"))?;
+        cache.check_and_record(RpcNonceRecord {
+            nonce,
+            signed_at,
+            now,
+            wall_time,
+            expires_at,
+            capacity: *REPLAY_CACHE_CAPACITY,
+            metric_scope: RpcReplayCacheMetricScope {
+                operation: tonic_rpc_metric_operation(rpc_path),
+                backend: INTERNODE_TRANSPORT_BACKEND_GRPC,
+                rpc_path,
+            },
+        })
+    };
+    publish_nonce_cache_metrics(metrics);
+    result
 }
 
 /// Build headers with authentication signature
@@ -814,7 +1095,7 @@ fn verify_tonic_replay_scope_signature(audience: &str, path: &str, headers: &Hea
     if boot_epoch != tonic_rpc_boot_epoch() {
         return Err(std::io::Error::other("RPC boot epoch is stale"));
     }
-    check_and_record_nonce(nonce, signed_at)
+    check_and_record_nonce(nonce, signed_at, path)
 }
 
 /// Verify gRPC authentication, preferring v2 without downgrade on malformed v2 metadata.
@@ -847,6 +1128,46 @@ pub fn verify_tonic_rpc_signature_with_bootstrap(
     )
 }
 
+pub fn tonic_rpc_auth_failure_reason(error: &std::io::Error) -> &'static str {
+    match error.to_string().as_str() {
+        "Missing RPC audience" => "missing_audience",
+        "Invalid RPC request path" => "invalid_request_path",
+        "RPC replay-scoped authentication required" => "replay_scope_required",
+        "Missing RPC replay scope version" => "missing_replay_scope_version",
+        "Unsupported RPC replay scope version" => "unsupported_replay_scope_version",
+        "Missing RPC replay scope signature" => "missing_replay_scope_signature",
+        "Missing RPC replay scope nonce" => "missing_replay_scope_nonce",
+        "Invalid RPC replay scope nonce" => "invalid_replay_scope_nonce",
+        "Missing RPC boot epoch" => "missing_boot_epoch",
+        "Invalid RPC boot epoch" => "invalid_boot_epoch",
+        "Invalid RPC replay scope signature" => "invalid_replay_scope_signature",
+        "RPC boot epoch is stale" => "stale_boot_epoch",
+        "RPC request replay detected" => "replay_detected",
+        "RPC replay cache capacity exceeded" => "replay_cache_capacity",
+        "RPC replay cache unavailable" => "replay_cache_unavailable",
+        "RPC replay expiry overflow" => "replay_expiry_overflow",
+        "RPC request timestamp expired after clock regression" => "timestamp_expired_after_clock_regression",
+        "RPC v2 authentication required" => "v2_required",
+        "Missing RPC auth version" => "missing_v2_auth_version",
+        "Unsupported RPC auth version" => "unsupported_v2_auth_version",
+        "Missing RPC v2 signature" => "missing_v2_signature",
+        "Invalid RPC v2 signature" => "invalid_v2_signature",
+        "Missing timestamp header" => "missing_timestamp",
+        "Invalid timestamp format" => "invalid_timestamp",
+        "Request timestamp expired" => "timestamp_expired",
+        "Missing RPC nonce" => "missing_v2_nonce",
+        "Invalid RPC nonce" => "invalid_v2_nonce",
+        "Invalid unsigned RPC nonce" => "invalid_unsigned_v2_nonce",
+        "Missing RPC content SHA-256" => "missing_content_sha256",
+        "Invalid RPC content SHA-256" => "invalid_content_sha256",
+        "Missing signature header" => "missing_v1_signature",
+        "Invalid signature" => "invalid_v1_signature",
+        "Invalid RPC HMAC key" => "invalid_hmac_key",
+        message if message.contains(RPC_SECRET_REQUIRED_OPERATOR_MESSAGE) => "missing_rpc_secret",
+        _ => "unknown",
+    }
+}
+
 fn verify_tonic_rpc_signature_with_policy(
     audience: &str,
     path: &str,
@@ -965,7 +1286,7 @@ fn verify_tonic_rpc_signature_with_strictness(
         return Err(std::io::Error::other("Invalid RPC v2 signature"));
     }
     if let Some(nonce) = parsed_nonce {
-        check_and_record_nonce(nonce, timestamp)?;
+        check_and_record_nonce(nonce, timestamp, path)?;
     }
     Ok(())
 }
@@ -1699,6 +2020,31 @@ mod tests {
         assert!(verify_tonic_boot_epoch_response("node-a:9000", Uuid::new_v4(), &headers).is_err());
     }
 
+    #[test]
+    fn tonic_rpc_auth_failure_reason_maps_security_relevant_errors() {
+        for (message, reason) in [
+            ("Invalid RPC v2 signature", "invalid_v2_signature"),
+            ("RPC replay-scoped authentication required", "replay_scope_required"),
+            ("Missing RPC replay scope signature", "missing_replay_scope_signature"),
+            ("RPC boot epoch is stale", "stale_boot_epoch"),
+            ("RPC request replay detected", "replay_detected"),
+            ("Request timestamp expired", "timestamp_expired"),
+            ("Missing RPC content SHA-256", "missing_content_sha256"),
+            ("Invalid RPC content SHA-256", "invalid_content_sha256"),
+        ] {
+            assert_eq!(
+                tonic_rpc_auth_failure_reason(&std::io::Error::other(message)),
+                reason,
+                "message {message:?} should map to a stable low-cardinality reason"
+            );
+        }
+    }
+
+    #[test]
+    fn tonic_rpc_auth_failure_reason_falls_back_for_unclassified_errors() {
+        assert_eq!(tonic_rpc_auth_failure_reason(&std::io::Error::other("opaque failure")), "unknown");
+    }
+
     #[test]
     fn malformed_v2_auth_does_not_downgrade_to_valid_legacy_signature() {
         ensure_test_rpc_secret();
@@ -1903,6 +2249,126 @@ mod tests {
         assert_eq!(error.to_string(), "RPC mutation requires v2 authentication");
     }
 
+    #[test]
+    fn tonic_rpc_metric_operation_classifies_get_hot_path_methods() {
+        assert_eq!(
+            tonic_rpc_metric_operation("/node_service.NodeService/ReadAll"),
+            INTERNODE_OPERATION_GRPC_READ_ALL
+        );
+        assert_eq!(
+            tonic_rpc_metric_operation("/node_service.NodeService/ReadMultiple"),
+            INTERNODE_OPERATION_GRPC_READ_MULTIPLE
+        );
+        assert_eq!(
+            tonic_rpc_metric_operation("/node_service.NodeService/WriteAll"),
+            INTERNODE_OPERATION_GRPC_WRITE_ALL
+        );
+        assert_eq!(
+            tonic_rpc_metric_operation("/node_service.NodeService/SignalService"),
+            INTERNODE_OPERATION_GRPC_OTHER
+        );
+        assert_eq!(tonic_rpc_metric_operation("not-a-grpc-path"), INTERNODE_OPERATION_GRPC_OTHER);
+    }
+
+    #[test]
+    fn replay_cache_capacity_uses_env_with_default_floor() {
+        let default = rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY;
+
+        let high = replay_cache_capacity_decision(
+            rustfs_utils::EnvParseOutcome::Parsed(default * 16),
+            2,
+            Some(512 * 1024 * 1024),
+            Some(MemoryBasis::Host),
+        );
+        assert_eq!(high.capacity, default * 16);
+        assert_eq!(high.source, ReplayCacheCapacitySource::Env);
+
+        let low = replay_cache_capacity_decision(
+            rustfs_utils::EnvParseOutcome::Parsed(1),
+            64,
+            Some(128 * 1024 * 1024 * 1024),
+            Some(MemoryBasis::Host),
+        );
+        assert_eq!(low.capacity, default);
+        assert_eq!(low.source, ReplayCacheCapacitySource::EnvClampedToDefault);
+    }
+
+    #[test]
+    fn replay_cache_capacity_auto_sizes_from_cpu_and_memory() {
+        let gib = 1024_u64 * 1024 * 1024;
+        let decision =
+            replay_cache_capacity_decision(rustfs_utils::EnvParseOutcome::Absent, 8, Some(16 * gib), Some(MemoryBasis::Host));
+
+        assert_eq!(decision.source, ReplayCacheCapacitySource::Auto);
+        assert_eq!(decision.memory_basis, Some(MemoryBasis::Host));
+        assert_eq!(decision.memory_based_capacity, 10_737_418);
+        assert_eq!(decision.cpu_based_capacity, 9_846_784);
+        assert_eq!(decision.capacity, 9_846_784);
+    }
+
+    #[test]
+    fn replay_cache_capacity_auto_reaches_hotpath_verified_capacity_on_larger_nodes() {
+        let gib = 1024_u64 * 1024 * 1024;
+        let decision =
+            replay_cache_capacity_decision(rustfs_utils::EnvParseOutcome::Absent, 16, Some(32 * gib), Some(MemoryBasis::Host));
+
+        assert_eq!(decision.source, ReplayCacheCapacitySource::Auto);
+        assert_eq!(decision.memory_based_capacity, 21_474_836);
+        assert_eq!(decision.cpu_based_capacity, 19_693_568);
+        assert_eq!(decision.capacity, 16_777_216);
+    }
+
+    #[test]
+    fn replay_cache_capacity_auto_keeps_default_floor_for_small_nodes() {
+        let decision = replay_cache_capacity_decision(
+            rustfs_utils::EnvParseOutcome::Absent,
+            1,
+            Some(512 * 1024 * 1024),
+            Some(MemoryBasis::Host),
+        );
+
+        assert_eq!(decision.capacity, rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY);
+        assert_eq!(decision.source, ReplayCacheCapacitySource::AutoClampedToDefault);
+        assert!(decision.memory_based_capacity < rustfs_config::DEFAULT_INTERNODE_RPC_REPLAY_CACHE_CAPACITY);
+    }
+
+    #[test]
+    fn replay_cache_capacity_invalid_env_uses_auto_sizing() {
+        let decision = replay_cache_capacity_decision(rustfs_utils::EnvParseOutcome::Invalid, 8, None, None);
+
+        assert_eq!(decision.source, ReplayCacheCapacitySource::AutoInvalidEnv);
+        assert_eq!(decision.capacity, 9_846_784);
+    }
+
+    fn check_test_nonce_record(cache: &mut RpcNonceCache, record: RpcNonceRecord<'_>) -> std::io::Result<()> {
+        let (result, metrics) = cache.check_and_record(record);
+        publish_nonce_cache_metrics(metrics);
+        result
+    }
+
+    fn test_nonce_record(
+        nonce: Uuid,
+        signed_at: i64,
+        now: Instant,
+        wall_time: i64,
+        expires_at: Instant,
+        capacity: usize,
+    ) -> RpcNonceRecord<'static> {
+        RpcNonceRecord {
+            nonce,
+            signed_at,
+            now,
+            wall_time,
+            expires_at,
+            capacity,
+            metric_scope: RpcReplayCacheMetricScope {
+                operation: INTERNODE_OPERATION_GRPC_READ_ALL,
+                backend: INTERNODE_TRANSPORT_BACKEND_GRPC,
+                rpc_path: "/node_service.NodeService/ReadAll",
+            },
+        }
+    }
+
     #[test]
     fn nonce_cache_expires_by_monotonic_deadline_and_fails_closed_at_capacity() {
         let now = Instant::now();
@@ -1912,15 +2378,12 @@ mod tests {
         let nonce_b = Uuid::new_v4();
         let mut cache = RpcNonceCache::default();
 
-        cache
-            .check_and_record(nonce_a, 100, now, 100, expiry, 1)
+        check_test_nonce_record(&mut cache, test_nonce_record(nonce_a, 100, now, 100, expiry, 1))
             .expect("first nonce should be recorded");
-        let capacity = cache
-            .check_and_record(nonce_b, 100, now, 100, expiry, 1)
+        let capacity = check_test_nonce_record(&mut cache, test_nonce_record(nonce_b, 100, now, 100, expiry, 1))
             .expect_err("a full replay cache must fail closed");
         assert_eq!(capacity.to_string(), "RPC replay cache capacity exceeded");
-        cache
-            .check_and_record(nonce_b, 702, after_expiry, 702, after_expiry, 1)
+        check_test_nonce_record(&mut cache, test_nonce_record(nonce_b, 702, after_expiry, 702, after_expiry, 1))
             .expect("expired nonce should release capacity");
         assert!(!cache.nonces.contains(&nonce_a));
         assert!(cache.nonces.contains(&nonce_b));
@@ -2123,17 +2586,15 @@ mod tests {
         let nonce = Uuid::new_v4();
         let mut cache = RpcNonceCache::default();
 
-        cache
-            .check_and_record(nonce, 1_000, now, 1_000, expiry, 2)
+        check_test_nonce_record(&mut cache, test_nonce_record(nonce, 1_000, now, 1_000, expiry, 2))
             .expect("first nonce should be recorded");
-        let replay = cache
-            .check_and_record(nonce, 1_000, after_expiry, 900, after_expiry, 2)
+        let replay = check_test_nonce_record(&mut cache, test_nonce_record(nonce, 1_000, after_expiry, 900, after_expiry, 2))
             .expect_err("wall clock regression must not make an old signature reusable");
         assert_eq!(replay.to_string(), "RPC request replay detected");
 
-        let stale = cache
-            .check_and_record(Uuid::new_v4(), 600, after_expiry, 900, after_expiry, 2)
-            .expect_err("the monotonic wall-clock high-water mark must fail closed");
+        let stale =
+            check_test_nonce_record(&mut cache, test_nonce_record(Uuid::new_v4(), 600, after_expiry, 900, after_expiry, 2))
+                .expect_err("the monotonic wall-clock high-water mark must fail closed");
         assert_eq!(stale.to_string(), "RPC request timestamp expired after clock regression");
     }
 }

crates/ecstore/src/cluster/rpc/mod.rs

@@ -34,8 +34,8 @@ pub use client::{
 pub use http_auth::{
     TONIC_RPC_PREFIX, build_auth_headers, gen_signature_headers, gen_tonic_replay_scope_headers, gen_tonic_signature_headers,
     normalize_tonic_rpc_audience, set_tonic_canonical_body_digest, set_tonic_mutation_body_digest, sign_ns_scanner_capability,
-    sign_tonic_rpc_response_proof, tonic_boot_epoch_challenge, tonic_boot_epoch_response_headers, verify_ns_scanner_capability,
-    verify_rpc_signature, verify_tonic_boot_epoch_response, verify_tonic_canonical_body_digest,
+    sign_tonic_rpc_response_proof, tonic_boot_epoch_challenge, tonic_boot_epoch_response_headers, tonic_rpc_auth_failure_reason,
+    verify_ns_scanner_capability, verify_rpc_signature, verify_tonic_boot_epoch_response, verify_tonic_canonical_body_digest,
     verify_tonic_mutation_body_digest, verify_tonic_rpc_response_proof, verify_tonic_rpc_signature,
     verify_tonic_rpc_signature_with_bootstrap,
 };

crates/ecstore/src/cluster/rpc/peer_s3_client.rs

@@ -99,6 +99,69 @@ impl DeleteBucketEmptyScanBarrier {
 #[cfg(test)]
 static DELETE_BUCKET_EMPTY_SCAN_BARRIER: StdMutex<Option<Arc<DeleteBucketEmptyScanBarrier>>> = StdMutex::new(None);
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+enum HealBucketOperation {
+    Make,
+    Delete,
+}
+
+#[cfg(test)]
+struct HealBucketOperationFailure {
+    bucket: String,
+    disk_index: usize,
+    operation: HealBucketOperation,
+}
+
+#[cfg(test)]
+type HealBucketOperationFailureKey = (String, usize, HealBucketOperation);
+
+#[cfg(test)]
+fn heal_bucket_operation_failures() -> &'static StdMutex<HashMap<HealBucketOperationFailureKey, Error>> {
+    static FAILURES: std::sync::OnceLock<StdMutex<HashMap<HealBucketOperationFailureKey, Error>>> = std::sync::OnceLock::new();
+    FAILURES.get_or_init(|| StdMutex::new(HashMap::new()))
+}
+
+#[cfg(test)]
+impl HealBucketOperationFailure {
+    fn install(bucket: &str, disk_index: usize, operation: HealBucketOperation, error: Error) -> Self {
+        let key = (bucket.to_string(), disk_index, operation);
+        let previous = heal_bucket_operation_failures()
+            .lock()
+            .expect("heal bucket failure registry should not poison")
+            .insert(key, error);
+        assert!(previous.is_none(), "heal bucket operation failure already installed");
+        Self {
+            bucket: bucket.to_string(),
+            disk_index,
+            operation,
+        }
+    }
+}
+
+#[cfg(test)]
+impl Drop for HealBucketOperationFailure {
+    fn drop(&mut self) {
+        heal_bucket_operation_failures()
+            .lock()
+            .expect("heal bucket failure registry should not poison")
+            .remove(&(self.bucket.clone(), self.disk_index, self.operation));
+    }
+}
+
+#[cfg(test)]
+fn injected_heal_bucket_operation_error(bucket: &str, disk_index: usize, operation: HealBucketOperation) -> Option<Error> {
+    heal_bucket_operation_failures()
+        .lock()
+        .expect("heal bucket failure registry should not poison")
+        .get(&(bucket.to_string(), disk_index, operation))
+        .cloned()
+}
+
+#[cfg(not(test))]
+fn injected_heal_bucket_operation_error(_bucket: &str, _disk_index: usize, _operation: HealBucketOperation) -> Option<Error> {
+    None
+}
+
 #[cfg(test)]
 pub(crate) fn install_delete_bucket_empty_scan_barrier() -> Arc<DeleteBucketEmptyScanBarrier> {
     let barrier = Arc::new(DeleteBucketEmptyScanBarrier::default());
@@ -1207,10 +1270,6 @@ pub(crate) async fn heal_bucket_local_on_disks(
         ..Default::default()
     };
 
-    if opts.dry_run {
-        return Ok(res);
-    }
-
     for (disk, state) in disks.iter().zip(before_state.read().await.iter()) {
         res.before.drives.push(HealDriveInfo {
             uuid: "".to_string(),
@@ -1219,35 +1278,68 @@ pub(crate) async fn heal_bucket_local_on_disks(
         });
     }
 
+    if opts.dry_run {
+        for (disk, state) in disks.iter().zip(after_state.read().await.iter()) {
+            res.after.drives.push(HealDriveInfo {
+                uuid: "".to_string(),
+                endpoint: disk.clone().map(|s| s.to_string()).unwrap_or_default(),
+                state: state.to_string(),
+            });
+        }
+        return Ok(res);
+    }
+
+    let mut operation_error = errs
+        .iter()
+        .filter_map(|err| match err {
+            Some(Error::VolumeNotFound) | None => None,
+            Some(err) => Some(err.clone()),
+        })
+        .next();
+
     if opts.remove && !bucket.starts_with(disk::RUSTFS_META_BUCKET) && !is_all_buckets_not_found(&errs) {
         let mut futures = Vec::new();
-        for disk in disks.iter() {
-            let disk = disk.clone();
+        for (index, disk) in disks.iter().enumerate() {
+            if matches!(errs[index].as_ref(), Some(Error::DiskNotFound | Error::VolumeNotFound)) {
+                continue;
+            }
+            let Some(disk) = disk.clone() else {
+                continue;
+            };
             let bucket = bucket.to_string();
-            info!("heal_bucket_local, errs: {:?}, opts: {:?}", errs, opts);
             futures.push(async move {
-                match disk {
-                    Some(disk) => {
-                        // Non-force: a bucket that still holds object data refuses
-                        // deletion (VolumeNotEmpty) instead of being recursively
-                        // wiped, so a misclassified "dangling" bucket cannot lose
-                        // data (backlog#799 B1). Surface that refusal instead of
-                        // discarding it — it signals the bucket is not dangling.
-                        match disk.delete_volume(&bucket, false).await {
-                            Ok(()) => None,
-                            Err(Error::VolumeNotEmpty) => {
-                                warn!("heal declined to remove non-empty bucket {bucket} (not dangling)");
-                                None
-                            }
-                            Err(e) => Some(e),
-                        }
-                    }
-                    None => Some(Error::DiskNotFound),
+                if let Some(err) = injected_heal_bucket_operation_error(&bucket, index, HealBucketOperation::Delete) {
+                    return (index, Err(err));
                 }
+                (index, disk.delete_volume(&bucket, false).await)
             });
         }
 
-        let _ = join_all(futures).await;
+        for (index, result) in join_all(futures).await {
+            match result {
+                Ok(()) | Err(Error::VolumeNotFound) => {
+                    after_state.write().await[index] = DriveState::Missing.to_string();
+                }
+                Err(Error::VolumeNotEmpty) => {
+                    warn!(
+                        bucket,
+                        operation = "heal_bucket_delete_volume",
+                        result = "preserved_non_empty_bucket",
+                        "heal declined to remove non-empty bucket"
+                    );
+                    after_state.write().await[index] = DriveState::Ok.to_string();
+                }
+                Err(err) => {
+                    after_state.write().await[index] = match &err {
+                        Error::DiskNotFound => DriveState::Offline.to_string(),
+                        _ => DriveState::Corrupt.to_string(),
+                    };
+                    if operation_error.is_none() {
+                        operation_error = Some(err);
+                    }
+                }
+            }
+        }
     }
 
     if !opts.remove {
@@ -1256,41 +1348,56 @@ pub(crate) async fn heal_bucket_local_on_disks(
             let disk = disk.clone();
             let bucket = bucket.to_string();
             let bs_clone = before_state.clone();
-            let as_clone = after_state.clone();
-            let errs_clone = errs.to_vec();
             futures.push(async move {
                 if bs_clone.read().await[idx] == DriveState::Missing.to_string() {
                     let Some(disk) = disk.as_ref() else {
-                        return Some(Error::DiskNotFound);
+                        return (idx, Some(Error::DiskNotFound));
                     };
 
-                    info!("bucket not find, will recreate");
+                    if let Some(err) = injected_heal_bucket_operation_error(&bucket, idx, HealBucketOperation::Make) {
+                        return (idx, Some(err));
+                    }
                     match disk.make_volume(&bucket).await {
-                        Ok(_) => {
-                            as_clone.write().await[idx] = DriveState::Ok.to_string();
-                            return None;
-                        }
-                        Err(err) => {
-                            return Some(err);
-                        }
+                        Ok(()) | Err(Error::VolumeExists) => return (idx, None),
+                        Err(err) => return (idx, Some(err)),
                     }
                 }
-                errs_clone[idx].clone()
+                (idx, None)
             });
         }
 
-        let _ = join_all(futures).await;
+        for (index, result) in join_all(futures).await {
+            match result {
+                None => {
+                    if before_state.read().await[index] == DriveState::Missing.to_string() {
+                        after_state.write().await[index] = DriveState::Ok.to_string();
+                    }
+                }
+                Some(err) => {
+                    after_state.write().await[index] = match &err {
+                        Error::DiskNotFound => DriveState::Offline.to_string(),
+                        _ => DriveState::Corrupt.to_string(),
+                    };
+                    if operation_error.is_none() {
+                        operation_error = Some(err);
+                    }
+                }
+            }
+        }
     }
 
     for (disk, state) in disks.iter().zip(after_state.read().await.iter()) {
-        res.before.drives.push(HealDriveInfo {
+        res.after.drives.push(HealDriveInfo {
             uuid: "".to_string(),
             endpoint: disk.clone().map(|s| s.to_string()).unwrap_or_default(),
             state: state.to_string(),
         });
     }
 
-    Ok(res)
+    match operation_error {
+        Some(err) => Err(err),
+        None => Ok(res),
+    }
 }
 
 async fn clone_drives() -> Vec<Option<DiskStore>> {
@@ -1756,7 +1863,7 @@ mod tests {
             .await
             .expect_err("second disk should start missing the bucket");
 
-        heal_bucket_local(
+        let result = heal_bucket_local(
             bucket,
             &HealOpts {
                 recreate: true,
@@ -1766,6 +1873,25 @@ mod tests {
         .await
         .expect("bucket heal should recreate missing volumes");
 
+        assert_eq!(result.before.drives.len(), 2);
+        assert_eq!(result.after.drives.len(), 2);
+        assert!(
+            result
+                .before
+                .drives
+                .iter()
+                .any(|drive| drive.state == DriveState::Missing.to_string()),
+            "one bucket volume must be reported missing before heal"
+        );
+        assert!(
+            result
+                .after
+                .drives
+                .iter()
+                .all(|drive| drive.state == DriveState::Ok.to_string()),
+            "all bucket volumes must be reported healthy after heal"
+        );
+
         for disk in disks {
             disk.stat_volume(bucket).await.expect("bucket should exist after heal");
         }
@@ -1773,6 +1899,166 @@ mod tests {
         reset_local_disk_test_state().await;
     }
 
+    #[tokio::test]
+    #[serial]
+    async fn heal_bucket_local_dry_run_reports_discovered_drive_states() {
+        reset_local_disk_test_state().await;
+
+        let temp_dir = TempDir::new().expect("create temp dir for bucket heal dry-run regression");
+        let disks = init_test_local_disks(&temp_dir, 2, "heal-bucket-local-dry-run-reports-state").await;
+        let bucket = "dry-run-healed-bucket";
+        disks[0]
+            .make_volume(bucket)
+            .await
+            .expect("bucket should exist on the first disk");
+
+        let result = heal_bucket_local_on_disks(
+            bucket,
+            &HealOpts {
+                dry_run: true,
+                ..Default::default()
+            },
+            vec![Some(disks[0].clone()), Some(disks[1].clone()), None],
+        )
+        .await
+        .expect("dry-run bucket heal should inspect disks");
+
+        assert_eq!(result.before.drives.len(), 3);
+        assert_eq!(result.after.drives.len(), 3);
+        assert_eq!(result.before.drives[0].state, DriveState::Ok.to_string());
+        assert_eq!(result.before.drives[1].state, DriveState::Missing.to_string());
+        assert_eq!(result.before.drives[2].state, DriveState::Offline.to_string());
+        for (before, after) in result.before.drives.iter().zip(&result.after.drives) {
+            assert_eq!(after.endpoint, before.endpoint);
+            assert_eq!(after.state, before.state);
+        }
+        assert!(matches!(disks[1].stat_volume(bucket).await, Err(Error::VolumeNotFound)));
+
+        reset_local_disk_test_state().await;
+    }
+
+    #[tokio::test]
+    #[serial]
+    async fn heal_bucket_local_propagates_recreate_failure() {
+        reset_local_disk_test_state().await;
+
+        let temp_dir = TempDir::new().expect("create temp dir for bucket recreate failure regression");
+        let disks = init_test_local_disks(&temp_dir, 2, "heal-bucket-local-propagates-recreate-failure").await;
+        let bucket = "recreate-failure-bucket";
+        disks[0]
+            .make_volume(bucket)
+            .await
+            .expect("bucket should exist on the first disk");
+        let _failure = HealBucketOperationFailure::install(bucket, 1, HealBucketOperation::Make, Error::DiskAccessDenied);
+
+        let error = heal_bucket_local_on_disks(
+            bucket,
+            &HealOpts {
+                recreate: true,
+                ..Default::default()
+            },
+            disks.iter().cloned().map(Some).collect(),
+        )
+        .await
+        .expect_err("failed volume recreation must fail bucket heal");
+
+        assert_eq!(error, Error::DiskAccessDenied);
+        assert!(matches!(disks[1].stat_volume(bucket).await, Err(Error::VolumeNotFound)));
+
+        reset_local_disk_test_state().await;
+    }
+
+    #[tokio::test]
+    #[serial]
+    async fn heal_bucket_local_propagates_delete_failure() {
+        reset_local_disk_test_state().await;
+
+        let temp_dir = TempDir::new().expect("create temp dir for bucket delete failure regression");
+        let disks = init_test_local_disks(&temp_dir, 2, "heal-bucket-local-propagates-delete-failure").await;
+        let bucket = "delete-failure-bucket";
+        disks[0]
+            .make_volume(bucket)
+            .await
+            .expect("bucket should exist on the first disk");
+        let _failure = HealBucketOperationFailure::install(bucket, 0, HealBucketOperation::Delete, Error::DiskAccessDenied);
+
+        let error = heal_bucket_local_on_disks(
+            bucket,
+            &HealOpts {
+                remove: true,
+                ..Default::default()
+            },
+            disks.iter().cloned().map(Some).collect(),
+        )
+        .await
+        .expect_err("failed volume deletion must fail bucket heal");
+
+        assert_eq!(error, Error::DiskAccessDenied);
+        disks[0]
+            .stat_volume(bucket)
+            .await
+            .expect("failed deletion must leave the bucket volume present");
+
+        reset_local_disk_test_state().await;
+    }
+
+    #[tokio::test]
+    #[serial]
+    async fn heal_bucket_local_preserves_non_empty_bucket() {
+        reset_local_disk_test_state().await;
+
+        let temp_dir = TempDir::new().expect("create temp dir for non-empty bucket heal regression");
+        let disks = init_test_local_disks(&temp_dir, 1, "heal-bucket-local-preserves-non-empty").await;
+        let bucket = "non-empty-bucket";
+        disks[0]
+            .make_volume(bucket)
+            .await
+            .expect("bucket should exist on the first disk");
+        let _failure = HealBucketOperationFailure::install(bucket, 0, HealBucketOperation::Delete, Error::VolumeNotEmpty);
+
+        let result = heal_bucket_local_on_disks(
+            bucket,
+            &HealOpts {
+                remove: true,
+                ..Default::default()
+            },
+            disks.iter().cloned().map(Some).collect(),
+        )
+        .await
+        .expect("a non-empty bucket refusal is an expected safety result");
+
+        assert_eq!(result.after.drives.len(), 1);
+        assert_eq!(result.after.drives[0].state, DriveState::Ok.to_string());
+        disks[0]
+            .stat_volume(bucket)
+            .await
+            .expect("the non-empty bucket must remain present");
+
+        reset_local_disk_test_state().await;
+    }
+
+    #[tokio::test]
+    #[serial]
+    async fn heal_bucket_local_propagates_preexisting_offline_disk() {
+        reset_local_disk_test_state().await;
+
+        let temp_dir = TempDir::new().expect("create temp dir for offline bucket heal regression");
+        let disks = init_test_local_disks(&temp_dir, 1, "heal-bucket-local-preexisting-offline").await;
+        let bucket = "offline-disk-bucket";
+        disks[0]
+            .make_volume(bucket)
+            .await
+            .expect("bucket should exist on the online disk");
+
+        let error = heal_bucket_local_on_disks(bucket, &HealOpts::default(), vec![Some(disks[0].clone()), None])
+            .await
+            .expect_err("a prepass offline disk must keep the bucket heal incomplete");
+
+        assert_eq!(error, Error::DiskNotFound);
+
+        reset_local_disk_test_state().await;
+    }
+
     #[test]
     fn test_reduce_pool_write_quorum_uses_only_pool_participants() {
         let clients = vec![

crates/ecstore/src/cluster/rpc/remote_disk.rs

@@ -1117,15 +1117,31 @@ impl RemoteDisk {
 }
 
 /// Initial capacity hint (bytes) for msgpack encode buffers, sized to cover a typical single-
-/// version `FileInfo` without repeated growth reallocations. Larger payloads still grow as needed.
+/// request without repeated growth reallocations. Larger payloads still grow as needed.
 const MSGPACK_ENCODE_CAPACITY_HINT: usize = 512;
+const FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT: usize = 1024;
 
-fn encode_msgpack<T: Serialize>(value: &T) -> Result<Vec<u8>> {
-    let mut serializer = rmp_serde::Serializer::new(Vec::with_capacity(MSGPACK_ENCODE_CAPACITY_HINT));
+fn encode_msgpack_with_capacity<T: Serialize>(value: &T, capacity: usize) -> Result<Vec<u8>> {
+    let mut serializer = rmp_serde::Serializer::new(Vec::with_capacity(capacity));
     value.serialize(&mut serializer)?;
     Ok(serializer.into_inner())
 }
 
+fn encode_msgpack<T: Serialize>(value: &T) -> Result<Vec<u8>> {
+    encode_msgpack_with_capacity(value, MSGPACK_ENCODE_CAPACITY_HINT)
+}
+
+fn encode_file_info_msgpack(value: &FileInfo) -> Result<Vec<u8>> {
+    encode_msgpack_with_capacity(value, FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT)
+}
+
+fn encode_file_info_versions_msgpack(value: &FileInfoVersions) -> Result<Vec<u8>> {
+    let version_count = value.versions.len().saturating_add(value.free_versions.len());
+    let capacity =
+        MSGPACK_ENCODE_CAPACITY_HINT.saturating_add(FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT.saturating_mul(version_count));
+    encode_msgpack_with_capacity(value, capacity)
+}
+
 /// JSON compatibility string for a dual-encoded (`_bin` + text) request field. Returns an empty
 /// string only when msgpack-only mode and its explicit fleet confirmation guard are both enabled;
 /// otherwise the legacy JSON encoding is retained for old peers.
@@ -1136,12 +1152,6 @@ fn compat_json<T: Serialize>(value: &T) -> Result<String> {
     Ok(serde_json::to_string(value)?)
 }
 
-fn encode_msgpack_named<T: Serialize>(value: &T) -> Result<Vec<u8>> {
-    let mut serializer = rmp_serde::Serializer::new(Vec::with_capacity(MSGPACK_ENCODE_CAPACITY_HINT)).with_struct_map();
-    value.serialize(&mut serializer)?;
-    Ok(serializer.into_inner())
-}
-
 fn decode_msgpack_or_json<T: DeserializeOwned>(binary: &[u8], json: &str, value_name: &'static str) -> Result<T> {
     if !binary.is_empty() {
         let mut deserializer = rmp_serde::Deserializer::new(Cursor::new(binary));
@@ -1580,7 +1590,7 @@ impl DiskAPI for RemoteDisk {
             || async {
                 // `_bin` support for DeleteVersion is new (grpc-optimization P2); always dual-write
                 // JSON + msgpack until its fallback counter has read zero across a release window.
-                let file_info_bin = encode_msgpack(&fi)?;
+                let file_info_bin = encode_file_info_msgpack(&fi)?;
                 let opts_bin = encode_msgpack(&opts)?;
                 let file_info = serde_json::to_string(&fi)?;
                 let opts = serde_json::to_string(&opts)?;
@@ -1670,7 +1680,7 @@ impl DiskAPI for RemoteDisk {
                     return errors;
                 }
             });
-            versions_bin.push(match encode_msgpack(file_info_versions) {
+            versions_bin.push(match encode_file_info_versions_msgpack(file_info_versions) {
                 Ok(versions_bin) => Bytes::from(versions_bin),
                 Err(err) => {
                     let mut errors = Vec::with_capacity(versions.len());
@@ -1886,7 +1896,7 @@ impl DiskAPI for RemoteDisk {
             "Remote disk RPC started"
         );
         let file_info = compat_json(&fi)?;
-        let file_info_bin = encode_msgpack(&fi)?;
+        let file_info_bin = encode_file_info_msgpack(&fi)?;
 
         self.execute_with_timeout_for_op(
             "write_metadata",
@@ -1965,7 +1975,7 @@ impl DiskAPI for RemoteDisk {
         );
         let file_info = compat_json(&fi)?;
         let opts_str = compat_json(&opts)?;
-        let file_info_bin = encode_msgpack(&fi)?;
+        let file_info_bin = encode_file_info_msgpack(&fi)?;
         let opts_bin = encode_msgpack(opts)?;
 
         self.execute_with_timeout_for_op(
@@ -2229,7 +2239,7 @@ impl DiskAPI for RemoteDisk {
             "rename_data",
             || async {
                 let file_info = compat_json(&fi)?;
-                let file_info_bin = encode_msgpack_named(&fi)?;
+                let file_info_bin = encode_file_info_msgpack(&fi)?;
                 let mut client = self
                     .get_client()
                     .await
@@ -3371,6 +3381,8 @@ mod tests {
         crate::cluster::rpc::runtime_sources::reset_internode_metrics_for_test();
         let response = RenameDataResp {
             old_data_dir: Some(Uuid::new_v4()),
+            rollback_data_dir: Some(Uuid::new_v4()),
+            cleanup_data_dir: Some(Uuid::new_v4()),
             sign: Some(vec![0x14, 0x35]),
             old_current_size: Some(crate::disk::OldCurrentSize::Present(64 * 1024)),
         };
@@ -3384,6 +3396,8 @@ mod tests {
         let decode_errors_after = crate::cluster::rpc::runtime_sources::internode_msgpack_json_decode_error_total_for_test();
 
         assert_eq!(decoded.old_data_dir, response.old_data_dir);
+        assert_eq!(decoded.rollback_data_dir, response.rollback_data_dir);
+        assert_eq!(decoded.cleanup_data_dir, response.cleanup_data_dir);
         assert_eq!(decoded.sign, response.sign);
         assert_eq!(decoded.old_current_size, response.old_current_size);
         assert!(
@@ -3733,8 +3747,13 @@ mod tests {
     fn rename_data_file_info_named_msgpack_is_smaller_than_json() {
         let file_info = sample_rename_data_file_info();
         let json = serde_json::to_vec(&file_info).expect("file info json should encode");
-        let named_msgpack = encode_msgpack_named(&file_info).expect("file info named msgpack should encode");
+        let named_msgpack = encode_file_info_msgpack(&file_info).expect("file info named msgpack should encode");
 
+        assert!(
+            named_msgpack.len() <= FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT,
+            "typical FileInfo should fit the msgpack capacity hint (msgpack={}, hint={FILE_INFO_MSGPACK_ENCODE_CAPACITY_HINT})",
+            named_msgpack.len()
+        );
         assert!(
             named_msgpack.len() < json.len(),
             "expected named msgpack payload to be smaller than json (msgpack={}, json={})",
@@ -3747,11 +3766,13 @@ mod tests {
     fn rename_data_resp_named_msgpack_is_smaller_than_json() {
         let response = RenameDataResp {
             old_data_dir: Some(Uuid::new_v4()),
+            rollback_data_dir: Some(Uuid::new_v4()),
+            cleanup_data_dir: Some(Uuid::new_v4()),
             sign: Some(vec![1_u8; 32]),
             old_current_size: Some(crate::disk::OldCurrentSize::Present(4096)),
         };
         let json = serde_json::to_vec(&response).expect("rename data response json should encode");
-        let named_msgpack = encode_msgpack_named(&response).expect("rename data response named msgpack should encode");
+        let named_msgpack = rmp_serde::encode::to_vec_named(&response).expect("rename data response named msgpack should encode");
 
         assert!(
             named_msgpack.len() < json.len(),

crates/ecstore/src/config/com.rs

@@ -51,6 +51,7 @@ use serde_json::{Map, Value};
 use std::collections::{HashMap, HashSet};
 use std::sync::LazyLock;
 use std::sync::{Arc, RwLock};
+use tokio::io::AsyncReadExt;
 use tokio::sync::{OwnedRwLockWriteGuard, RwLock as AsyncRwLock};
 use tracing::{debug, error, info, instrument, warn};
 use uuid::Uuid;
@@ -400,6 +401,14 @@ 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)
+}
+
 /// 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`.
@@ -407,7 +416,7 @@ pub(crate) async fn read_config_preserve_empty<S>(api: Arc<S>, file: &str) -> Re
 where
     S: EcstoreObjectIO,
 {
-    let (data, _obj) = read_config_with_metadata_inner(api, file, &ObjectOptions::default(), true).await?;
+    let (data, _obj) = read_config_with_metadata_inner(api, file, &ObjectOptions::default(), true, None).await?;
     Ok(data)
 }
 
@@ -435,6 +444,23 @@ where
     Ok(data)
 }
 
+pub(crate) async fn read_config_no_lock_preserve_empty_with_metadata<S>(api: Arc<S>, file: &str) -> Result<(Vec<u8>, ObjectInfo)>
+where
+    S: EcstoreObjectIO,
+{
+    read_config_with_metadata_inner(
+        api,
+        file,
+        &ObjectOptions {
+            no_lock: true,
+            ..Default::default()
+        },
+        true,
+        None,
+    )
+    .await
+}
+
 pub async fn read_config_with_metadata<S>(api: Arc<S>, file: &str, opts: &ObjectOptions) -> Result<(Vec<u8>, ObjectInfo)>
 where
     S: ObjectIO<
@@ -447,7 +473,7 @@ where
             PutObjectReader = PutObjReader,
         >,
 {
-    read_config_with_metadata_inner(api, file, opts, false).await
+    read_config_with_metadata_inner(api, file, opts, false, None).await
 }
 
 async fn read_config_with_metadata_inner<S>(
@@ -455,6 +481,7 @@ async fn read_config_with_metadata_inner<S>(
     file: &str,
     opts: &ObjectOptions,
     preserve_empty: bool,
+    max_bytes: Option<usize>,
 ) -> Result<(Vec<u8>, ObjectInfo)>
 where
     S: ObjectIO<
@@ -480,7 +507,25 @@ where
             }
         })?;
 
-    let data = rd.read_all().await?;
+    let data = if let Some(max_bytes) = max_bytes {
+        let object_size = usize::try_from(rd.object_info.size).map_err(|_| Error::CorruptedFormat)?;
+        if object_size > max_bytes {
+            return Err(Error::CorruptedFormat);
+        }
+
+        let read_limit = max_bytes.checked_add(1).ok_or(Error::CorruptedFormat)?;
+        let mut data = Vec::with_capacity(read_limit.min(64 * 1024));
+        (&mut rd)
+            .take(u64::try_from(read_limit).map_err(|_| Error::CorruptedFormat)?)
+            .read_to_end(&mut data)
+            .await?;
+        if data.len() > max_bytes {
+            return Err(Error::CorruptedFormat);
+        }
+        data
+    } else {
+        rd.read_all().await?
+    };
 
     if data.is_empty() && !preserve_empty {
         return Err(Error::ConfigNotFound);
@@ -586,10 +631,47 @@ where
             PutObjectReader = PutObjReader,
         >,
 {
-    save_config_with_opts_and_metadata(api, file, data, opts).await.map(|_| ())
+    save_config_with_opts_inner(api, file, data, opts, true).await.map(|_| ())
+}
+
+/// Saves a configuration object without logging an error for a retryable caller-owned failure.
+pub async fn save_config_with_opts_quiet<S>(api: Arc<S>, file: &str, data: Vec<u8>, opts: &ObjectOptions) -> Result<()>
+where
+    S: ObjectIO<
+            Error = Error,
+            RangeSpec = HTTPRangeSpec,
+            HeaderMap = HeaderMap,
+            ObjectOptions = ObjectOptions,
+            ObjectInfo = ObjectInfo,
+            GetObjectReader = GetObjectReader,
+            PutObjectReader = PutObjReader,
+        >,
+{
+    save_config_with_opts_inner(api, file, data, opts, false).await.map(|_| ())
 }
 
 async fn save_config_with_opts_and_metadata<S>(api: Arc<S>, file: &str, data: Vec<u8>, opts: &ObjectOptions) -> Result<ObjectInfo>
+where
+    S: ObjectIO<
+            Error = Error,
+            RangeSpec = HTTPRangeSpec,
+            HeaderMap = HeaderMap,
+            ObjectOptions = ObjectOptions,
+            ObjectInfo = ObjectInfo,
+            GetObjectReader = GetObjectReader,
+            PutObjectReader = PutObjReader,
+        >,
+{
+    save_config_with_opts_inner(api, file, data, opts, true).await
+}
+
+async fn save_config_with_opts_inner<S>(
+    api: Arc<S>,
+    file: &str,
+    data: Vec<u8>,
+    opts: &ObjectOptions,
+    log_error: bool,
+) -> Result<ObjectInfo>
 where
     S: ObjectIO<
             Error = Error,
@@ -605,7 +687,9 @@ where
     match api.put_object(RUSTFS_META_BUCKET, file, &mut put_data, opts).await {
         Ok(object_info) => Ok(object_info),
         Err(err) => {
-            error!("save_config_with_opts: err: {:?}, file: {}", err, file);
+            if log_error {
+                error!("save_config_with_opts: err: {:?}, file: {}", err, file);
+            }
             Err(err)
         }
     }
@@ -2299,7 +2383,7 @@ where
     let lock = api.new_ns_lock(RUSTFS_META_BUCKET, &transaction_lock).await?;
     let guard = lock.get_write_lock(get_lock_acquire_timeout()).await?;
     let read_options = ObjectOptions::default();
-    match read_config_with_metadata_inner(api, &config_file, &read_options, true).await {
+    match read_config_with_metadata_inner(api, &config_file, &read_options, true, None).await {
         Ok((raw, object_info)) => {
             let (config, seed) = decode_persisted_server_config_with_seed(&raw)?;
             Ok(ServerConfigSnapshot {
@@ -2555,9 +2639,10 @@ mod tests {
     use super::{
         SERVER_CONFIG_LOCK, ServerConfigSnapshot, apply_dynamic_config_for_sub_sys_with, config_task_join_error,
         configs_semantically_equal, decode_server_config_blob, encode_server_config_blob, is_standard_object_server_config,
-        lookup_configs, new_and_save_server_config, read_config, read_config_preserve_empty, read_config_with_metadata,
-        read_config_without_migrate, read_server_config_snapshot, save_server_config, save_server_config_snapshot,
-        save_server_config_snapshot_with_generation, server_config_transaction_lock_path, storage_class_kvs_mut,
+        lookup_configs, new_and_save_server_config, read_config, read_config_no_lock_preserve_empty_with_metadata,
+        read_config_preserve_empty, read_config_with_metadata, read_config_without_migrate, read_server_config_snapshot,
+        save_server_config, save_server_config_snapshot, save_server_config_snapshot_with_generation,
+        server_config_transaction_lock_path, storage_class_kvs_mut,
     };
     use crate::config::{audit, heal, notify, oidc, scanner};
     use crate::disk::endpoint::Endpoint;
@@ -4988,10 +5073,15 @@ mod tests {
             .expect_err("the existing config contract treats empty objects as missing");
         assert!(matches!(err, Error::ConfigNotFound));
 
-        let data = read_config_preserve_empty(store, "config/empty.json")
+        let data = read_config_preserve_empty(store.clone(), "config/empty.json")
             .await
             .expect("payload-validating callers must observe the empty object");
         assert!(data.is_empty());
+
+        let (data, _) = read_config_no_lock_preserve_empty_with_metadata(store, "config/empty.json")
+            .await
+            .expect("no-lock payload-validating callers must observe the empty object");
+        assert!(data.is_empty());
     }
 
     #[async_trait::async_trait]

crates/ecstore/src/core/pools.rs

@@ -18,13 +18,13 @@ use crate::bucket::{
     lifecycle::{
         bucket_lifecycle_audit::LcEventSrc,
         bucket_lifecycle_ops::{
-            LifecycleOps, apply_expiry_on_transitioned_object, apply_expiry_rule, eval_action_from_lifecycle,
+            LifecycleOps, apply_expiry_on_transitioned_object, apply_expiry_rule_in, eval_action_from_lifecycle,
             lifecycle_delete_all_versions_blocked_by_replication,
         },
+        get_expiry_configs,
         lifecycle::IlmAction,
     },
     metadata_sys,
-    object_lock::objectlock_sys::BucketObjectLockSys,
 };
 use crate::cache_value::metacache_set::{ListPathRawOptions, list_path_raw};
 use crate::config::com::{CONFIG_PREFIX, read_config, read_config_no_lock, save_config, save_config_with_opts};
@@ -60,7 +60,7 @@ use rustfs_common::defer;
 use rustfs_common::heal_channel::HealOpts;
 use rustfs_filemeta::{FileInfoVersions, MetaCacheEntries, MetaCacheEntry, MetadataResolutionParams};
 use rustfs_utils::path::{encode_dir_object, path_join, path_to_bucket_object, path_to_bucket_object_with_base_path};
-use s3s::dto::{BucketLifecycleConfiguration, DefaultRetention, ReplicationConfiguration};
+use s3s::dto::{BucketLifecycleConfiguration, ObjectLockConfiguration, ReplicationConfiguration};
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, HashSet};
 use std::fmt::Display;
@@ -2192,7 +2192,7 @@ pub(crate) async fn should_skip_lifecycle_for_data_movement(
     bucket: &str,
     version: &rustfs_filemeta::FileInfo,
     lifecycle_config: Option<&BucketLifecycleConfiguration>,
-    lock_retention: Option<DefaultRetention>,
+    object_lock_config: Option<&ObjectLockConfiguration>,
     apply_actions: bool,
     event_source: &LcEventSrc,
 ) -> Result<bool> {
@@ -2202,12 +2202,16 @@ pub(crate) async fn should_skip_lifecycle_for_data_movement(
 
     let versioned = BucketVersioningSys::prefix_enabled(bucket, &version.name).await;
     let object_info = crate::object_api::ObjectInfo::from_file_info(version, bucket, &version.name, versioned);
-    let event = eval_action_from_lifecycle(lifecycle_config, lock_retention, &object_info).await;
+    let event = eval_action_from_lifecycle(lifecycle_config, object_lock_config, &object_info).await;
 
     match event.action {
         IlmAction::DeleteRestoredAction | IlmAction::DeleteRestoredVersionAction => {
             if apply_actions && object_info.is_remote() {
-                let _ = apply_expiry_on_transitioned_object(store, &object_info, &event, event_source).await;
+                let Ok(bucket_incarnation_id) = store.bucket_incarnation_id_from_disk(bucket).await else {
+                    return Ok(false);
+                };
+                let _ =
+                    apply_expiry_on_transitioned_object(store, &object_info, &event, event_source, bucket_incarnation_id).await;
             }
             Ok(false)
         }
@@ -2215,7 +2219,7 @@ pub(crate) async fn should_skip_lifecycle_for_data_movement(
             if lifecycle_delete_all_versions_blocked_by_replication(store.clone(), bucket, &object_info.name, action).await? {
                 return Ok(false);
             }
-            let applied = !apply_actions || apply_expiry_rule(&event, event_source, &object_info).await;
+            let applied = !apply_actions || apply_expiry_rule_in(store, &event, event_source, &object_info).await;
             resolve_data_movement_lifecycle_expiry_result(action, apply_actions, applied)
         }
         _ => Ok(false),
@@ -2647,7 +2651,7 @@ impl ECStore {
     }
 
     #[allow(unused_assignments, clippy::too_many_arguments)]
-    #[tracing::instrument(skip(self, set, _worker_permit, lifecycle_config, lock_retention, replication_config))]
+    #[tracing::instrument(skip(self, set, _worker_permit, lifecycle_config, object_lock_config, replication_config))]
     async fn decommission_entry(
         self: &Arc<Self>,
         rx: CancellationToken,
@@ -2657,7 +2661,7 @@ impl ECStore {
         set: Arc<SetDisks>,
         _worker_permit: OwnedSemaphorePermit,
         lifecycle_config: Option<BucketLifecycleConfiguration>,
-        lock_retention: Option<DefaultRetention>,
+        object_lock_config: Option<ObjectLockConfiguration>,
         replication_config: Option<(ReplicationConfiguration, OffsetDateTime)>,
     ) -> Result<()> {
         debug!(
@@ -2708,7 +2712,7 @@ impl ECStore {
                 &bucket,
                 version,
                 lifecycle_config.as_ref(),
-                lock_retention.clone(),
+                object_lock_config.as_ref(),
                 true,
                 &LcEventSrc::Decom,
             )
@@ -3013,7 +3017,14 @@ impl ECStore {
                 &cleanup_preflight_allowed_missing,
                 "decommission",
             )
-            .await;
+            .await
+            .map_err(|err| match err {
+                data_movement::SourceCleanupError::SourceChanged => Error::other(format!(
+                    "decommission: source cleanup preflight failed for {}/{}: source versions changed after migration started",
+                    bucket, entry.name
+                )),
+                data_movement::SourceCleanupError::Storage(err) => err,
+            });
             resolve_decommission_entry_cleanup_delete_result(cleanup_result, bucket.as_str(), entry.name.as_str())?
         } else if decommissioned != fivs.versions.len() || expired > 0 {
             warn!(
@@ -3113,7 +3124,7 @@ impl ECStore {
         let mut listing_workers = Vec::with_capacity(pool.disk_set.len());
 
         let mut lifecycle_config = None;
-        let mut lock_retention = None;
+        let mut object_lock_config = None;
         let mut replication_config = None;
 
         if bi.name != RUSTFS_META_BUCKET {
@@ -3122,8 +3133,9 @@ impl ECStore {
                 "versioning",
                 BucketVersioningSys::get(&bi.name).await,
             )?;
-            lifecycle_config = runtime_sources::bucket_lifecycle_config(&bi.name).await;
-            lock_retention = BucketObjectLockSys::get(&bi.name).await;
+            let expiry_configs = get_expiry_configs(self, &bi.name).await?;
+            lifecycle_config = expiry_configs.lifecycle.map(|config| (*config).clone());
+            object_lock_config = expiry_configs.object_lock.map(|config| (*config).clone());
             replication_config = resolve_decommission_optional_bucket_config_result(
                 &bi.name,
                 "replication",
@@ -3155,7 +3167,7 @@ impl ECStore {
                 let workers = workers.clone();
                 let set = set.clone();
                 let lifecycle_config = lifecycle_config.clone();
-                let lock_retention = lock_retention.clone();
+                let object_lock_config = object_lock_config.clone();
                 let replication_config = replication_config.clone();
                 let entry_error = entry_error.clone();
                 let callback_rx = rx.clone();
@@ -3165,7 +3177,7 @@ impl ECStore {
                     let workers = workers.clone();
                     let set = set.clone();
                     let lifecycle_config = lifecycle_config.clone();
-                    let lock_retention = lock_retention.clone();
+                    let object_lock_config = object_lock_config.clone();
                     let replication_config = replication_config.clone();
                     let entry_error = entry_error.clone();
                     let callback_rx = callback_rx.clone();
@@ -3227,7 +3239,7 @@ impl ECStore {
                                 set,
                                 worker_permit,
                                 lifecycle_config,
-                                lock_retention,
+                                object_lock_config,
                                 replication_config,
                             )
                             .await
@@ -3960,10 +3972,11 @@ impl ECStore {
         for set in &pool.disk_set {
             for bucket_info in &buckets {
                 let mut lifecycle_config = None;
-                let mut lock_retention = None;
+                let mut object_lock_config = None;
                 if bucket_info.name != RUSTFS_META_BUCKET {
-                    lifecycle_config = runtime_sources::bucket_lifecycle_config(&bucket_info.name).await;
-                    lock_retention = BucketObjectLockSys::get(&bucket_info.name).await;
+                    let expiry_configs = get_expiry_configs(self, &bucket_info.name).await?;
+                    lifecycle_config = expiry_configs.lifecycle.map(|config| (*config).clone());
+                    object_lock_config = expiry_configs.object_lock.map(|config| (*config).clone());
                 }
 
                 let versions_found = Arc::new(AtomicUsize::new(0));
@@ -3973,7 +3986,7 @@ impl ECStore {
                 let entry_error_cb = entry_error.clone();
                 let bucket_name = bucket_info.name.clone();
                 let lifecycle_config_cb = lifecycle_config.clone();
-                let lock_retention_cb = lock_retention.clone();
+                let object_lock_config_cb = object_lock_config.clone();
                 let store = Arc::clone(self);
                 let callback_rx_cb = callback_rx.clone();
 
@@ -3982,7 +3995,7 @@ impl ECStore {
                     let entry_error = entry_error_cb.clone();
                     let bucket_name = bucket_name.clone();
                     let lifecycle_config = lifecycle_config_cb.clone();
-                    let lock_retention = lock_retention_cb.clone();
+                    let object_lock_config = object_lock_config_cb.clone();
                     let store = Arc::clone(&store);
                     let callback_rx = callback_rx_cb.clone();
                     Box::pin(async move {
@@ -4024,7 +4037,7 @@ impl ECStore {
                                 &bucket_name,
                                 version,
                                 lifecycle_config.as_ref(),
-                                lock_retention.clone(),
+                                object_lock_config.as_ref(),
                                 false,
                                 &LcEventSrc::Decom,
                             )

crates/ecstore/src/core/sets.rs

@@ -14,7 +14,7 @@
 // limitations under the License.
 
 use crate::disk::error_reduce::count_errs;
-use crate::error::{Error, Result};
+use crate::error::{Error, Result, is_all_volume_not_found, is_err_object_not_found, is_err_strict_volume_not_found};
 use crate::layout::set_heal::{formats_to_drives_info, new_heal_format_sets};
 use crate::multipart_listing::paginate_multipart_listing;
 use crate::storage_api_contracts::{
@@ -71,6 +71,10 @@ type WalkOptions = StorageWalkOptions<fn(&FileInfo) -> bool>;
 
 const LIST_MULTIPART_SETS_CONCURRENCY: usize = 4;
 
+fn is_idempotent_delete_prefix_error(err: &Error) -> bool {
+    is_err_object_not_found(err) || is_err_strict_volume_not_found(err)
+}
+
 #[derive(Debug, Clone)]
 pub struct Sets {
     pub id: Uuid,
@@ -339,7 +343,19 @@ impl Sets {
             futures.push(set.delete_object(bucket, object, opt.clone()));
         }
 
-        let _results = join_all(futures).await;
+        let errs = join_all(futures)
+            .await
+            .into_iter()
+            .map(|result| result.err())
+            .collect::<Vec<_>>();
+        if is_all_volume_not_found(&errs) {
+            return Err(StorageError::BucketNotFound(bucket.to_string()));
+        }
+        for err in errs.into_iter().flatten() {
+            if !is_idempotent_delete_prefix_error(&err) {
+                return Err(err);
+            }
+        }
 
         Ok(())
     }
@@ -733,7 +749,7 @@ impl crate::storage_api_contracts::list::ListOperations for Sets {
     type WalkCancellation = CancellationToken;
     type WalkResultSender = tokio::sync::mpsc::Sender<ObjectInfoOrErr>;
 
-    #[tracing::instrument(skip(self))]
+    #[tracing::instrument(level = "trace", skip(self))]
     async fn list_objects_v2(
         self: Arc<Self>,
         bucket: &str,
@@ -814,8 +830,19 @@ impl crate::storage_api_contracts::multipart::MultipartOperations for Sets {
                 let upload_id_marker = upload_id_marker.clone();
                 let delimiter = delimiter.clone();
                 async move {
-                    set.list_multipart_uploads(bucket, prefix, key_marker, upload_id_marker, delimiter, per_set_limit)
-                        .await
+                    // ECStore owns the bucket lifecycle fence and calls the
+                    // incarnation-aware pool helper. This lower-level trait
+                    // surface has no ECStore guard to propagate.
+                    set.list_multipart_uploads_for_incarnation(
+                        bucket,
+                        prefix,
+                        key_marker,
+                        upload_id_marker,
+                        delimiter,
+                        per_set_limit,
+                        None,
+                    )
+                    .await
                 }
             })
             .buffer_unordered(LIST_MULTIPART_SETS_CONCURRENCY)
@@ -1066,7 +1093,7 @@ impl crate::storage_api_contracts::heal::HealOperations for Sets {
 
         Ok(result)
     }
-    #[tracing::instrument(skip(self))]
+    #[tracing::instrument(level = "trace", skip(self, opts), fields(bucket = %bucket, object = %object, version_id = %version_id))]
     async fn heal_object(
         &self,
         bucket: &str,
@@ -1274,6 +1301,19 @@ mod tests {
         );
     }
 
+    #[test]
+    fn delete_prefix_error_classification_only_ignores_absence() {
+        assert!(is_idempotent_delete_prefix_error(&StorageError::FileNotFound));
+        assert!(is_idempotent_delete_prefix_error(&StorageError::ObjectNotFound(
+            "bucket".to_string(),
+            "prefix".to_string()
+        )));
+        assert!(is_idempotent_delete_prefix_error(&StorageError::VolumeNotFound));
+        assert!(is_idempotent_delete_prefix_error(&StorageError::BucketNotFound("bucket".to_string())));
+        assert!(!is_idempotent_delete_prefix_error(&StorageError::DiskNotFound));
+        assert!(!is_idempotent_delete_prefix_error(&StorageError::ErasureWriteQuorum));
+    }
+
     #[tokio::test]
     async fn sets_get_pool_and_set_returns_matching_coordinates() {
         let format = FormatV3::new(2, 2);
@@ -1391,6 +1431,161 @@ mod tests {
         (temp_dirs, sets)
     }
 
+    #[tokio::test]
+    async fn delete_prefix_surfaces_a_hard_error_from_any_set() {
+        let (_temp_dirs, sets) = two_set_test_sets().await;
+        let bucket = format!("delete-prefix-{}", Uuid::new_v4().simple());
+        sets.make_bucket(&bucket, &MakeBucketOptions::default())
+            .await
+            .expect("bucket should be created across both sets");
+
+        let healthy_disks = sets.disk_set[0].disks.read().await.clone();
+        for disk in healthy_disks.iter().flatten() {
+            disk.write_all(&bucket, "blocked/prefix/object", bytes::Bytes::from_static(b"data"))
+                .await
+                .expect("healthy set should contain the prefix");
+        }
+
+        let failing_disks = sets.disk_set[1].disks.read().await.clone();
+        for disk in failing_disks.iter().flatten() {
+            disk.write_all(&bucket, "blocked", bytes::Bytes::from_static(b"not-a-directory"))
+                .await
+                .expect("failing set should contain a parent file");
+        }
+
+        let err = sets
+            .delete_object(
+                &bucket,
+                "blocked/prefix",
+                ObjectOptions {
+                    delete_prefix: true,
+                    ..Default::default()
+                },
+            )
+            .await
+            .expect_err("a hard failure from one set must not be reported as success");
+
+        match err {
+            StorageError::PrefixAccessDenied(error_bucket, error_prefix) => {
+                assert_eq!(error_bucket, bucket);
+                assert_eq!(error_prefix, "blocked/prefix");
+            }
+            other => panic!("unexpected recursive delete error: {other:?}"),
+        }
+        for disk in healthy_disks.iter().flatten() {
+            assert!(
+                matches!(disk.read_all(&bucket, "blocked/prefix/object").await, Err(DiskError::FileNotFound)),
+                "the healthy set should still complete its prefix deletion"
+            );
+        }
+    }
+
+    #[tokio::test]
+    async fn delete_prefix_keeps_a_missing_bucket_idempotent_across_sets() {
+        let (_temp_dirs, sets) = two_set_test_sets().await;
+        let bucket = format!("delete-prefix-{}", Uuid::new_v4().simple());
+        sets.make_bucket(&bucket, &MakeBucketOptions::default())
+            .await
+            .expect("bucket should be created across both sets");
+
+        let healthy_disks = sets.disk_set[0].disks.read().await.clone();
+        for disk in healthy_disks.iter().flatten() {
+            disk.write_all(&bucket, "existing/prefix/object", bytes::Bytes::from_static(b"data"))
+                .await
+                .expect("healthy set should contain the prefix");
+        }
+        let missing_bucket_disks = sets.disk_set[1].disks.read().await.clone();
+        for disk in missing_bucket_disks.iter().flatten() {
+            disk.delete_volume(&bucket, true)
+                .await
+                .expect("the bucket should be removed from one set");
+        }
+
+        sets.delete_object(
+            &bucket,
+            "existing/prefix",
+            ObjectOptions {
+                delete_prefix: true,
+                ..Default::default()
+            },
+        )
+        .await
+        .expect("a missing bucket on one set should remain an idempotent success");
+        for disk in healthy_disks.iter().flatten() {
+            assert!(
+                matches!(disk.read_all(&bucket, "existing/prefix/object").await, Err(DiskError::FileNotFound)),
+                "the healthy set should still complete its prefix deletion"
+            );
+        }
+    }
+
+    #[tokio::test]
+    async fn delete_prefix_preserves_a_completely_missing_bucket_error() {
+        let (_temp_dirs, sets) = two_set_test_sets().await;
+        let bucket = format!("delete-prefix-missing-{}", Uuid::new_v4().simple());
+
+        let err = sets
+            .delete_object(
+                &bucket,
+                "missing/prefix",
+                ObjectOptions {
+                    delete_prefix: true,
+                    ..Default::default()
+                },
+            )
+            .await
+            .expect_err("a completely missing bucket must not be reported as a successful object deletion");
+
+        assert_eq!(err, StorageError::BucketNotFound(bucket));
+    }
+
+    #[tokio::test]
+    async fn delete_prefix_fails_when_one_set_is_entirely_offline() {
+        let (_temp_dirs, sets) = two_set_test_sets().await;
+        let bucket = format!("delete-prefix-{}", Uuid::new_v4().simple());
+        sets.make_bucket(&bucket, &MakeBucketOptions::default())
+            .await
+            .expect("bucket should be created across both sets");
+
+        let online_disks = sets.disk_set[0].disks.read().await.clone();
+        let offline_disks = sets.disk_set[1].disks.read().await.clone();
+        for disk in online_disks.iter().chain(offline_disks.iter()).flatten() {
+            disk.write_all(&bucket, "offline/prefix/object", bytes::Bytes::from_static(b"data"))
+                .await
+                .expect("each set should contain the prefix before the outage");
+        }
+        *sets.disk_set[1].disks.write().await = vec![None, None];
+
+        let err = sets
+            .delete_object(
+                &bucket,
+                "offline/prefix",
+                ObjectOptions {
+                    delete_prefix: true,
+                    ..Default::default()
+                },
+            )
+            .await
+            .expect_err("an entirely offline set must make the recursive delete fail");
+
+        assert!(
+            matches!(err, StorageError::InsufficientWriteQuorum(ref error_bucket, ref error_prefix)
+                if error_bucket == &bucket && error_prefix == "offline/prefix"),
+            "unexpected offline-set error: {err:?}"
+        );
+        for disk in online_disks.iter().flatten() {
+            assert!(matches!(
+                disk.read_all(&bucket, "offline/prefix/object").await,
+                Err(DiskError::FileNotFound)
+            ));
+        }
+        for disk in offline_disks.iter().flatten() {
+            disk.read_all(&bucket, "offline/prefix/object")
+                .await
+                .expect("the offline set's untouched prefix must still be present");
+        }
+    }
+
     #[tokio::test]
     async fn set_format_heal_accepts_quorum_from_a_nonzero_set() {
         let (_temp_dirs, sets) = two_set_test_sets().await;
@@ -1554,7 +1749,19 @@ mod tests {
             upload_id_marker = page.next_upload_id_marker;
         }
 
-        assert_eq!(actual, expected, "set-level merge must return every upload exactly once");
+        // Compare only the decoded `<uuid>x<timestamp>` suffixes: the full
+        // upload id embeds the process-global deployment id, which a
+        // concurrently running test can swap between create and list time.
+        let normalize = |uploads: &[(String, String)]| {
+            let mut normalized = uploads
+                .iter()
+                .map(|(key, upload_id)| (key.clone(), runtime_sources::upload_uuid_suffix(upload_id)))
+                .collect::<Vec<_>>();
+            normalized.sort();
+            normalized
+        };
+        let actual = normalize(&actual);
+        assert_eq!(actual, normalize(&expected), "set-level merge must return every upload exactly once");
         let mut deduped = actual.clone();
         deduped.dedup();
         assert_eq!(deduped.len(), actual.len(), "set-level pagination must not duplicate uploads");

crates/ecstore/src/data_movement/mod.rs

@@ -25,7 +25,7 @@ use crate::set_disk::{SetDisks, get_lock_acquire_timeout};
 use crate::storage_api_contracts::{
     multipart::{CompletePart, MultipartOperations as _},
     namespace::NamespaceLocking as _,
-    object::{ObjectIO as _, ObjectOperations as _},
+    object::{HTTPPreconditions, ObjectIO as _, ObjectOperations as _},
 };
 use crate::store::ECStore;
 use bytes::Bytes;
@@ -228,6 +228,7 @@ fn data_movement_complete_multipart_opts(object_info: &ObjectInfo, src_pool_idx:
     ObjectOptions {
         versioned: object_info.version_id.is_some(),
         version_id: object_info.version_id.as_ref().map(|v| v.to_string()),
+        http_preconditions: data_movement_unversioned_target_precondition(object_info),
         data_movement: true,
         mod_time: object_info.mod_time,
         preserve_etag: object_info.etag.clone(),
@@ -242,6 +243,7 @@ fn data_movement_put_object_opts(object_info: &ObjectInfo, src_pool_idx: usize)
         src_pool_idx,
         data_movement: true,
         version_id: object_info.version_id.as_ref().map(|v| v.to_string()),
+        http_preconditions: data_movement_unversioned_target_precondition(object_info),
         mod_time: object_info.mod_time,
         user_defined: data_movement_user_defined(object_info),
         preserve_etag: object_info.etag.clone(),
@@ -249,6 +251,17 @@ fn data_movement_put_object_opts(object_info: &ObjectInfo, src_pool_idx: usize)
     }
 }
 
+fn is_unversioned_data_movement_object(object_info: &ObjectInfo) -> bool {
+    object_info.version_id.is_none_or(|version_id| version_id.is_nil())
+}
+
+fn data_movement_unversioned_target_precondition(object_info: &ObjectInfo) -> Option<HTTPPreconditions> {
+    is_unversioned_data_movement_object(object_info).then(|| HTTPPreconditions {
+        if_none_match: Some("*".to_string()),
+        ..Default::default()
+    })
+}
+
 fn data_movement_put_object_reader(
     bucket: &str,
     object_info: &ObjectInfo,
@@ -337,7 +350,7 @@ fn schedule_data_movement_multipart_abort_cleanup(
 }
 
 fn should_check_data_movement_overwrite_resume(err: &Error) -> bool {
-    is_err_data_movement_overwrite(err)
+    is_err_data_movement_overwrite(err) || matches!(err, Error::PreconditionFailed)
 }
 
 fn effective_actual_size(info: &ObjectInfo) -> Option<i64> {
@@ -403,6 +416,16 @@ fn is_equivalent_data_movement_object(source: &ObjectInfo, target: &ObjectInfo)
         && are_equivalent_data_movement_parts(&source.parts, &target.parts)
 }
 
+fn is_superseding_unversioned_data_movement_object(source: &ObjectInfo, target: &ObjectInfo) -> bool {
+    is_unversioned_data_movement_object(source)
+        && is_unversioned_data_movement_object(target)
+        && !target.delete_marker
+        && source
+            .mod_time
+            .zip(target.mod_time)
+            .is_some_and(|(source_time, target_time)| target_time > source_time)
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 struct SourceCleanupPartIdentity {
     number: usize,
@@ -414,6 +437,15 @@ struct SourceCleanupPartIdentity {
     checksums: BTreeMap<String, String>,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+struct SourceCleanupErasureIdentity {
+    algorithm: String,
+    data_blocks: usize,
+    parity_blocks: usize,
+    block_size: usize,
+    distribution: Vec<usize>,
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub(crate) struct SourceCleanupVersionIdentity {
     name: String,
@@ -424,10 +456,28 @@ pub(crate) struct SourceCleanupVersionIdentity {
     etag: Option<String>,
     checksum: Option<Vec<u8>>,
     data_dir: Option<uuid::Uuid>,
+    transition_status: String,
+    transitioned_objname: String,
+    transition_tier: String,
+    transition_version_id: Option<uuid::Uuid>,
+    transition_version: Option<String>,
+    transition_version_state: u8,
+    expire_restored: bool,
+    erasure: SourceCleanupErasureIdentity,
     metadata: BTreeMap<String, String>,
     parts: Vec<SourceCleanupPartIdentity>,
 }
 
+fn source_cleanup_erasure_identity(erasure: &rustfs_filemeta::ErasureInfo) -> SourceCleanupErasureIdentity {
+    SourceCleanupErasureIdentity {
+        algorithm: erasure.algorithm.clone(),
+        data_blocks: erasure.data_blocks,
+        parity_blocks: erasure.parity_blocks,
+        block_size: erasure.block_size,
+        distribution: erasure.distribution.clone(),
+    }
+}
+
 fn source_cleanup_part_identity(part: &ObjectPartInfo) -> SourceCleanupPartIdentity {
     SourceCleanupPartIdentity {
         number: part.number,
@@ -457,6 +507,19 @@ pub(crate) fn source_cleanup_version_identity(version: &FileInfo) -> SourceClean
         etag: version.get_etag(),
         checksum: version.checksum.as_ref().map(|checksum| checksum.to_vec()),
         data_dir: version.data_dir,
+        transition_status: version.transition_status.clone(),
+        transitioned_objname: version.transitioned_objname.clone(),
+        transition_tier: version.transition_tier.clone(),
+        transition_version_id: version.transition_version_id,
+        transition_version: version.transition_version.clone(),
+        transition_version_state: match version.transition_version_state {
+            rustfs_filemeta::TransitionVersionState::Unknown => 0,
+            rustfs_filemeta::TransitionVersionState::KnownDisabled => 1,
+            rustfs_filemeta::TransitionVersionState::SuspendedNull => 2,
+            rustfs_filemeta::TransitionVersionState::Exact => 3,
+        },
+        expire_restored: version.expire_restored,
+        erasure: source_cleanup_erasure_identity(&version.erasure),
         metadata: version
             .metadata
             .iter()
@@ -472,10 +535,6 @@ fn source_cleanup_version_identities(fivs: &FileInfoVersions) -> Vec<SourceClean
     identities
 }
 
-fn source_cleanup_versions_match(expected: &FileInfoVersions, current: &FileInfoVersions) -> bool {
-    source_cleanup_versions_match_with_allowed_missing(expected, current, &[])
-}
-
 fn source_cleanup_versions_match_with_allowed_missing(
     expected: &FileInfoVersions,
     current: &FileInfoVersions,
@@ -507,6 +566,26 @@ fn source_cleanup_versions_match_with_allowed_missing(
         .all(|(identity, count)| allowed_counts.get(&identity).copied().unwrap_or_default() >= count)
 }
 
+#[derive(Debug, thiserror::Error)]
+pub(crate) enum SourceCleanupError {
+    #[error("source versions changed after migration started")]
+    SourceChanged,
+    #[error(transparent)]
+    Storage(#[from] Error),
+}
+
+fn ensure_source_cleanup_versions_match(
+    expected: &FileInfoVersions,
+    current: &FileInfoVersions,
+    allowed_missing: &[SourceCleanupVersionIdentity],
+) -> std::result::Result<(), SourceCleanupError> {
+    if source_cleanup_versions_match_with_allowed_missing(expected, current, allowed_missing) {
+        Ok(())
+    } else {
+        Err(SourceCleanupError::SourceChanged)
+    }
+}
+
 fn source_cleanup_preflight_error(op_label: &str, bucket: &str, object: &str, err: impl std::fmt::Display) -> Error {
     Error::other(format!("{op_label}: source cleanup preflight failed for {bucket}/{object}: {err}"))
 }
@@ -529,21 +608,87 @@ pub(crate) async fn ensure_source_cleanup_versions_unchanged(
     expected: &FileInfoVersions,
     allowed_missing: &[SourceCleanupVersionIdentity],
     op_label: &str,
-) -> Result<()> {
+) -> std::result::Result<(), SourceCleanupError> {
     let Some(current) = load_source_cleanup_versions(set, bucket, object, op_label).await? else {
         return Ok(());
     };
 
-    if source_cleanup_versions_match_with_allowed_missing(expected, &current, allowed_missing) {
-        return Ok(());
+    ensure_source_cleanup_versions_match(expected, &current, allowed_missing)
+}
+
+#[cfg(test)]
+struct SourceCleanupDeleteBarrierState {
+    bucket: String,
+    object: String,
+    arrived: tokio::sync::Notify,
+    release: tokio::sync::Notify,
+}
+
+#[cfg(test)]
+pub(crate) struct SourceCleanupDeleteBarrier {
+    state: Arc<SourceCleanupDeleteBarrierState>,
+}
+
+#[cfg(test)]
+static SOURCE_CLEANUP_DELETE_BARRIER: std::sync::OnceLock<std::sync::Mutex<Option<Arc<SourceCleanupDeleteBarrierState>>>> =
+    std::sync::OnceLock::new();
+
+#[cfg(test)]
+impl SourceCleanupDeleteBarrier {
+    pub(crate) fn install(bucket: &str, object: &str) -> Self {
+        let state = Arc::new(SourceCleanupDeleteBarrierState {
+            bucket: bucket.to_string(),
+            object: object.to_string(),
+            arrived: tokio::sync::Notify::new(),
+            release: tokio::sync::Notify::new(),
+        });
+        let mut slot = SOURCE_CLEANUP_DELETE_BARRIER
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("source cleanup delete barrier mutex should not poison");
+        assert!(slot.is_none(), "source cleanup delete barrier must be unique");
+        *slot = Some(Arc::clone(&state));
+        Self { state }
     }
 
-    Err(source_cleanup_preflight_error(
-        op_label,
-        bucket,
-        object,
-        "source versions changed after migration started",
-    ))
+    pub(crate) async fn wait_until_paused(&self) {
+        tokio::time::timeout(StdDuration::from_secs(30), self.state.arrived.notified())
+            .await
+            .expect("source cleanup should reach the pre-delete barrier");
+    }
+
+    pub(crate) fn release(&self) {
+        self.state.release.notify_one();
+    }
+}
+
+#[cfg(test)]
+impl Drop for SourceCleanupDeleteBarrier {
+    fn drop(&mut self) {
+        self.state.release.notify_one();
+        let mut slot = SOURCE_CLEANUP_DELETE_BARRIER
+            .get_or_init(|| std::sync::Mutex::new(None))
+            .lock()
+            .expect("source cleanup delete barrier mutex should not poison");
+        if slot.as_ref().is_some_and(|state| Arc::ptr_eq(state, &self.state)) {
+            *slot = None;
+        }
+    }
+}
+
+#[cfg(test)]
+async fn pause_source_cleanup_before_delete(bucket: &str, object: &str) {
+    let barrier = SOURCE_CLEANUP_DELETE_BARRIER
+        .get_or_init(|| std::sync::Mutex::new(None))
+        .lock()
+        .expect("source cleanup delete barrier mutex should not poison")
+        .as_ref()
+        .filter(|barrier| barrier.bucket == bucket && barrier.object == object)
+        .cloned();
+    if let Some(barrier) = barrier {
+        barrier.arrived.notify_one();
+        barrier.release.notified().await;
+    }
 }
 
 pub(crate) async fn cleanup_source_entry_if_unchanged(
@@ -553,29 +698,32 @@ pub(crate) async fn cleanup_source_entry_if_unchanged(
     expected: &FileInfoVersions,
     allowed_missing: &[SourceCleanupVersionIdentity],
     op_label: &str,
-) -> Result<ObjectInfo> {
+) -> std::result::Result<ObjectInfo, SourceCleanupError> {
     let cleanup_key = encode_dir_object(object);
     let ns_lock = set.new_ns_lock(bucket, cleanup_key.as_str()).await?;
-    let _guard = ns_lock.get_write_lock(get_lock_acquire_timeout()).await?;
+    let _guard = ns_lock
+        .get_write_lock(get_lock_acquire_timeout())
+        .await
+        .map_err(Error::from)?;
 
     ensure_source_cleanup_versions_unchanged(set.clone(), bucket, object, expected, allowed_missing, op_label).await?;
 
-    let result = set
-        .delete_object(
-            bucket,
-            cleanup_key.as_str(),
-            ObjectOptions {
-                delete_prefix: true,
-                delete_prefix_object: true,
-                no_lock: true,
-                ..Default::default()
-            },
-        )
-        .await;
+    #[cfg(test)]
+    pause_source_cleanup_before_delete(bucket, object).await;
+
+    let mut opts = ObjectOptions {
+        delete_prefix: true,
+        delete_prefix_object: true,
+        data_movement: true,
+        no_lock: true,
+        ..Default::default()
+    };
+    opts.add_namespace_lock_guard(&_guard);
+    let result = set.delete_object(bucket, cleanup_key.as_str(), opts).await;
     if result.is_ok() {
         crate::store::list_objects::observe_scanner_namespace_mutations(bucket, 1);
     }
-    result
+    result.map_err(SourceCleanupError::from)
 }
 
 fn should_check_data_movement_resume_target(src_pool_idx: usize, target_pool_idx: usize) -> bool {
@@ -626,7 +774,11 @@ fn resolve_data_movement_overwrite_resume_result(
         return Ok(false);
     };
 
-    Ok(is_equivalent_data_movement_object(source, &target))
+    if is_equivalent_data_movement_object(source, &target) {
+        return Ok(true);
+    }
+
+    Ok(matches!(err, Error::PreconditionFailed) && is_superseding_unversioned_data_movement_object(source, &target))
 }
 
 async fn should_treat_data_movement_overwrite_as_complete(
@@ -837,7 +989,6 @@ pub(crate) async fn migrate_object(
                         bucket.as_str(),
                         object_info.name.as_str()
                     );
-                    mark_multipart_upload_completed(&abort_multipart_flag);
                     return Ok(());
                 }
 
@@ -856,6 +1007,32 @@ pub(crate) async fn migrate_object(
         }
         .await;
 
+        if multipart_result.is_ok() && should_abort_multipart_upload(&abort_multipart_flag) {
+            let abort_result = match store.pools.get(target_pool_idx) {
+                Some(pool) => {
+                    pool.abort_multipart_upload(&bucket, &object_info.name, &res.upload_id, &ObjectOptions::default())
+                        .await
+                }
+                None => Err(Error::other(format!(
+                    "{op_label}: target pool {target_pool_idx} is out of range while aborting superseded multipart upload"
+                ))),
+            };
+            if let Err(abort_err) = abort_result
+                && !is_err_invalid_upload_id(&abort_err)
+            {
+                error!("{op_label}: abort superseded multipart upload err {:?}", &abort_err);
+                schedule_data_movement_multipart_abort_cleanup(
+                    store.clone(),
+                    target_pool_idx,
+                    bucket.clone(),
+                    object_info.name.clone(),
+                    res.upload_id.clone(),
+                    op_label,
+                );
+            }
+            return Ok(());
+        }
+
         if let Err(primary_err) = multipart_result {
             if should_abort_multipart_upload(&abort_multipart_flag) {
                 return match store
@@ -1055,7 +1232,7 @@ mod tests {
         let expected = cleanup_test_versions(vec![first.clone(), second.clone()]);
         let current = cleanup_test_versions(vec![second, first]);
 
-        assert!(source_cleanup_versions_match(&expected, &current));
+        assert!(source_cleanup_versions_match_with_allowed_missing(&expected, &current, &[]));
     }
 
     #[test]
@@ -1063,7 +1240,40 @@ mod tests {
         let expected = cleanup_test_versions(vec![cleanup_test_file_info("object.txt", Uuid::from_u128(1), "source")]);
         let current = cleanup_test_versions(vec![cleanup_test_file_info("object.txt", Uuid::from_u128(1), "changed")]);
 
-        assert!(!source_cleanup_versions_match(&expected, &current));
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &[])
+            .expect_err("changed source metadata must defer cleanup");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
+    }
+
+    #[test]
+    fn test_source_cleanup_preflight_rejects_changed_transition_or_erasure() {
+        let expected = cleanup_test_versions(vec![cleanup_test_file_info("object.txt", Uuid::from_u128(1), "source")]);
+        let mut current = expected.clone();
+        current.versions[0].transition_tier = "COLD".to_string();
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &[])
+            .expect_err("transition metadata changes must defer cleanup");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
+
+        let mut current = expected.clone();
+        current.versions[0].erasure.algorithm = "changed".to_string();
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &[])
+            .expect_err("erasure metadata changes must defer cleanup");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
+    }
+
+    #[test]
+    fn test_source_cleanup_preflight_ignores_per_disk_erasure_fields() {
+        let mut expected = cleanup_test_versions(vec![cleanup_test_file_info("object.txt", Uuid::from_u128(1), "source")]);
+        expected.versions[0].erasure.checksums = vec![rustfs_filemeta::ChecksumInfo {
+            part_number: 1,
+            hash: Bytes::from_static(b"disk-a-checksum"),
+            ..Default::default()
+        }];
+        let mut current = expected.clone();
+        current.versions[0].erasure.index = 7;
+        current.versions[0].erasure.checksums[0].hash = Bytes::from_static(b"disk-b-checksum");
+
+        assert!(source_cleanup_versions_match_with_allowed_missing(&expected, &current, &[]));
     }
 
     #[test]
@@ -1074,7 +1284,9 @@ mod tests {
             cleanup_test_file_info("object.txt", Uuid::from_u128(2), "new-version"),
         ]);
 
-        assert!(!source_cleanup_versions_match(&expected, &current));
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &[])
+            .expect_err("an added source version must defer cleanup");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
     }
 
     #[test]
@@ -1095,7 +1307,9 @@ mod tests {
         let expected = cleanup_test_versions(vec![migrated.clone(), protected]);
         let current = cleanup_test_versions(vec![migrated]);
 
-        assert!(!source_cleanup_versions_match_with_allowed_missing(&expected, &current, &[]));
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &[])
+            .expect_err("an unexpected missing version must defer cleanup");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
     }
 
     #[test]
@@ -1107,7 +1321,9 @@ mod tests {
         let current = cleanup_test_versions(vec![migrated, new_version]);
         let allowed_missing = vec![source_cleanup_version_identity(&expired)];
 
-        assert!(!source_cleanup_versions_match_with_allowed_missing(&expected, &current, &allowed_missing));
+        let err = ensure_source_cleanup_versions_match(&expected, &current, &allowed_missing)
+            .expect_err("a new source version must defer cleanup even when an expired version may be missing");
+        assert!(matches!(err, SourceCleanupError::SourceChanged));
     }
 
     #[test]
@@ -1170,12 +1386,13 @@ mod tests {
     }
 
     #[test]
-    fn test_should_check_data_movement_overwrite_resume_only_for_overwrite_error() {
+    fn test_should_check_data_movement_overwrite_resume_accepts_conflict_errors() {
         assert!(should_check_data_movement_overwrite_resume(&Error::DataMovementOverwriteErr(
             "bucket-a".to_string(),
             "object-a".to_string(),
             "version-a".to_string(),
         )));
+        assert!(should_check_data_movement_overwrite_resume(&Error::PreconditionFailed));
         assert!(!should_check_data_movement_overwrite_resume(&Error::SlowDown));
     }
 
@@ -1550,7 +1767,7 @@ mod tests {
     #[test]
     fn test_data_movement_complete_multipart_opts_preserves_mod_time_version_and_etag() {
         let mod_time = OffsetDateTime::now_utc();
-        let version_id = Uuid::nil();
+        let version_id = Uuid::from_u128(7);
         let object_info = ObjectInfo {
             version_id: Some(version_id),
             mod_time: Some(mod_time),
@@ -1566,11 +1783,12 @@ mod tests {
         assert_eq!(opts.version_id.as_deref(), Some(version_id.to_string().as_str()));
         assert_eq!(opts.preserve_etag.as_deref(), Some("etag-value"));
         assert_eq!(opts.src_pool_idx, 7);
+        assert!(opts.http_preconditions.is_none());
     }
 
     #[test]
     fn test_data_movement_put_object_opts_preserves_version_and_etag() {
-        let version_id = Uuid::nil();
+        let version_id = Uuid::from_u128(9);
         let object_info = ObjectInfo {
             version_id: Some(version_id),
             mod_time: Some(OffsetDateTime::UNIX_EPOCH),
@@ -1588,6 +1806,35 @@ mod tests {
         assert_eq!(opts.src_pool_idx, 9);
         assert!(opts.data_movement);
         assert_eq!(opts.mod_time, object_info.mod_time);
+        assert!(opts.http_preconditions.is_none());
+    }
+
+    #[test]
+    fn test_data_movement_unversioned_put_and_complete_require_absent_target() {
+        for version_id in [None, Some(Uuid::nil())] {
+            let object_info = ObjectInfo {
+                version_id,
+                ..Default::default()
+            };
+
+            let put_opts = data_movement_put_object_opts(&object_info, 9);
+            let complete_opts = data_movement_complete_multipart_opts(&object_info, 9);
+
+            assert_eq!(
+                put_opts
+                    .http_preconditions
+                    .as_ref()
+                    .and_then(HTTPPreconditions::if_none_match_value),
+                Some("*")
+            );
+            assert_eq!(
+                complete_opts
+                    .http_preconditions
+                    .as_ref()
+                    .and_then(HTTPPreconditions::if_none_match_value),
+                Some("*")
+            );
+        }
     }
 
     #[test]
@@ -1836,6 +2083,154 @@ mod tests {
         assert!(should_resume);
     }
 
+    #[test]
+    fn test_precondition_conflict_accepts_newer_unversioned_target() {
+        for version_id in [None, Some(Uuid::nil())] {
+            let source = ObjectInfo {
+                version_id,
+                size: 128,
+                etag: Some("etag-source".to_string()),
+                mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+                ..Default::default()
+            };
+            let target = ObjectInfo {
+                etag: Some("etag-client-write".to_string()),
+                mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+                ..source.clone()
+            };
+
+            let should_resume =
+                resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
+                    .expect("precondition conflict target should be evaluated");
+
+            assert!(should_resume);
+        }
+    }
+
+    #[test]
+    fn test_precondition_conflict_accepts_equivalent_target() {
+        let source = ObjectInfo {
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+
+        let should_resume =
+            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(source.clone())), &source, 0, 1)
+                .expect("equivalent precondition target should be evaluated");
+
+        assert!(should_resume);
+    }
+
+    #[test]
+    fn test_precondition_conflict_rejects_non_newer_unversioned_target() {
+        let source = ObjectInfo {
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+        let target = ObjectInfo {
+            etag: Some("etag-conflict".to_string()),
+            ..source.clone()
+        };
+
+        let should_resume =
+            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
+                .expect("precondition conflict target should be evaluated");
+
+        assert!(!should_resume);
+    }
+
+    #[test]
+    fn test_precondition_conflict_rejects_newer_delete_marker() {
+        let source = ObjectInfo {
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+        let target = ObjectInfo {
+            delete_marker: true,
+            etag: None,
+            mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+            ..source.clone()
+        };
+
+        let should_resume =
+            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
+                .expect("delete marker conflict should be evaluated");
+
+        assert!(!should_resume);
+    }
+
+    #[test]
+    fn test_overwrite_error_rejects_newer_unversioned_target() {
+        let source = ObjectInfo {
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+        let target = ObjectInfo {
+            etag: Some("etag-client-write".to_string()),
+            mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+            ..source.clone()
+        };
+        let err = Error::DataMovementOverwriteErr("bucket".to_string(), "object".to_string(), "version".to_string());
+
+        let should_resume = resolve_data_movement_overwrite_resume_result(&err, Ok(Some(target)), &source, 0, 1)
+            .expect("pool-selection overwrite must require target equivalence");
+
+        assert!(!should_resume);
+    }
+
+    #[test]
+    fn test_precondition_conflict_rejects_newer_versioned_target() {
+        let source = ObjectInfo {
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+        let target = ObjectInfo {
+            version_id: Some(Uuid::from_u128(2)),
+            etag: Some("etag-conflict".to_string()),
+            mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+            ..source.clone()
+        };
+
+        let should_resume =
+            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
+                .expect("versioned conflict target should be evaluated");
+
+        assert!(!should_resume);
+    }
+
+    #[test]
+    fn test_precondition_conflict_rejects_versioned_source_with_unversioned_target() {
+        let source = ObjectInfo {
+            version_id: Some(Uuid::from_u128(1)),
+            size: 128,
+            etag: Some("etag-source".to_string()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            ..Default::default()
+        };
+        let target = ObjectInfo {
+            version_id: None,
+            etag: Some("etag-conflict".to_string()),
+            mod_time: OffsetDateTime::UNIX_EPOCH.checked_add(time::Duration::SECOND),
+            ..source.clone()
+        };
+
+        let should_resume =
+            resolve_data_movement_overwrite_resume_result(&Error::PreconditionFailed, Ok(Some(target)), &source, 0, 1)
+                .expect("versioned source conflict should be evaluated");
+
+        assert!(!should_resume);
+    }
+
     #[test]
     fn test_rebalance_overwrite_resume_accepts_equivalent_target_version() {
         let source = ObjectInfo {

crates/ecstore/src/data_usage/mod.rs

@@ -20,7 +20,7 @@ pub mod local_snapshot;
 use crate::storage_api_contracts::{
     bucket::{BucketOperations as _, BucketOptions},
     list::{ListOperations as _, StorageListObjectVersionsInfo},
-    object::{EcstoreObjectIO, HTTPPreconditions, ObjectIO as _},
+    object::{EcstoreObjectIO, HTTPPreconditions, ObjectIO as _, ObjectOperations as _},
 };
 use crate::{
     bucket::{metadata_sys::get_replication_config, versioning::VersioningApi as _, versioning_sys::BucketVersioningSys},
@@ -33,8 +33,9 @@ use crate::{
 };
 pub use local_snapshot::{LocalUsageSnapshot, read_snapshot as read_local_snapshot, snapshot_path};
 use rustfs_data_usage::{
-    BucketTargetUsageInfo, BucketUsageInfo, CompressionTotalInfo, DATA_USAGE_OBJECT_NAME, DataUsageCache, DataUsageEntry,
-    DataUsageInfo, DiskUsageStatus, LEGACY_DATA_USAGE_OBJECT_NAME, SizeHistogram, SizeSummary, VersionsHistogram,
+    BucketTargetUsageInfo, BucketUsageInfo, CompressionTotalInfo, DATA_USAGE_OBJECT_NAME, DATA_USAGE_OBSERVED_OBJECT_NAME,
+    DataUsageCache, DataUsageEntry, DataUsageInfo, DiskUsageStatus, LEGACY_DATA_USAGE_OBJECT_NAME, SizeHistogram, SizeSummary,
+    VersionsHistogram, observed_data_usage_is_newer,
 };
 use rustfs_io_metrics::record_system_path_failure;
 use rustfs_utils::path::SLASH_SEPARATOR;
@@ -85,12 +86,57 @@ static USAGE_CACHE_UPDATING: OnceLock<CacheUpdating> = OnceLock::new();
 static LIVE_BUCKET_USAGE_CACHE: OnceLock<LiveBucketUsageCache> = OnceLock::new();
 static USAGE_MEMORY_GENERATION: AtomicU64 = AtomicU64::new(0);
 
+/// Best-available persisted usage for `bucket` when no authoritative source
+/// exists yet (issue #5716): after an upgrade from a pre-v2 release the only
+/// persisted usage data is the legacy `.usage.json`, which is demoted to
+/// non-authoritative, and the authoritative caches stay empty until the
+/// scanner's first complete cycle lands. Quota admission degrades to the
+/// pre-discard per-bucket sizes retained on the cached snapshot instead of
+/// failing every write closed.
+///
+/// The baseline is static between snapshot loads — live writes do not advance
+/// it — so hard-quota enforcement during the degraded window is advisory: the
+/// overrun is bounded only by the writes issued before the next complete
+/// scanner cycle replaces the baseline with authoritative usage. That is
+/// strictly tighter than beta.11 (usage treated as 0) and strictly more
+/// available than a blanket 503. The fallback applies to any window without
+/// authoritative usage, not only pre-v2 upgrades; the values always come from
+/// the last persisted scanner output. Loads go through the TTL-bounded
+/// snapshot cache, so the quota path adds at most one backend read per
+/// [`DATA_USAGE_CACHE_TTL_SECS`] window. Returns `None` for buckets absent
+/// from every persisted snapshot — those still fail closed.
+pub async fn lookup_degraded_bucket_usage_baseline(store: Arc<ECStore>, bucket: &str) -> Option<u64> {
+    let ttl = Duration::from_secs(DATA_USAGE_CACHE_TTL_SECS);
+    {
+        let cache = data_usage_snapshot_cache().read().await;
+        if let Some(cached) = cache
+            .as_ref()
+            .filter(|cached| tokio::time::Instant::now().duration_since(cached.loaded_at) < ttl)
+        {
+            return cached.degraded_baseline.get(bucket).copied();
+        }
+    }
+
+    // Stale or empty cache: refresh through the TTL-bounded loader. A failed
+    // refresh carries the previous baseline forward, so quota admission keeps
+    // its last grounded values through a backend read outage.
+    let _ = load_data_usage_from_backend_cached(store).await;
+    let cache = data_usage_snapshot_cache().read().await;
+    cache
+        .as_ref()
+        .and_then(|cached| cached.degraded_baseline.get(bucket).copied())
+}
+
 /// Cached copy of the last persisted data usage snapshot, served to admin
 /// endpoints for up to `DATA_USAGE_CACHE_TTL_SECS` between backend reads.
 #[derive(Debug, Clone)]
 struct CachedDataUsageSnapshot {
     info: Option<DataUsageInfo>,
     loaded_at: tokio::time::Instant,
+    /// Pre-discard per-bucket sizes from the same load, retained even when the
+    /// snapshot is incomplete and its bucket data is discarded. Consumed only
+    /// by [`lookup_degraded_bucket_usage_baseline`] for quota admission.
+    degraded_baseline: HashMap<String, u64>,
 }
 
 impl CachedDataUsageSnapshot {
@@ -114,24 +160,34 @@ fn fresh_cached_data_usage_snapshot(
 
 fn cache_data_usage_snapshot_result(
     cache: &mut Option<CachedDataUsageSnapshot>,
-    result: Result<DataUsageInfo, Error>,
+    result: Result<(DataUsageInfo, HashMap<String, u64>), Error>,
     loaded_at: tokio::time::Instant,
     refresh_generation: u64,
+    current_generation: u64,
 ) -> Option<Result<DataUsageInfo, Error>> {
-    if data_usage_snapshot_generation() != refresh_generation {
+    if current_generation != refresh_generation {
         return None;
     }
 
     Some(match result {
-        Ok(info) => {
+        Ok((info, degraded_baseline)) => {
             *cache = Some(CachedDataUsageSnapshot {
                 info: Some(info.clone()),
                 loaded_at,
+                degraded_baseline,
             });
             Ok(info)
         }
         Err(e) => {
-            *cache = Some(CachedDataUsageSnapshot { info: None, loaded_at });
+            // Keep the previous baseline through a failed refresh: quota
+            // admission must not lose its last grounded values because one
+            // backend read errored.
+            let degraded_baseline = cache.take().map(|cached| cached.degraded_baseline).unwrap_or_default();
+            *cache = Some(CachedDataUsageSnapshot {
+                info: None,
+                loaded_at,
+                degraded_baseline,
+            });
             Err(e)
         }
     })
@@ -142,6 +198,9 @@ type DataUsageSnapshotCache = Arc<RwLock<Option<CachedDataUsageSnapshot>>>;
 static DATA_USAGE_SNAPSHOT_CACHE: OnceLock<DataUsageSnapshotCache> = OnceLock::new();
 static DATA_USAGE_SNAPSHOT_REFRESH: OnceLock<Arc<TokioMutex<()>>> = OnceLock::new();
 static DATA_USAGE_SNAPSHOT_GENERATION: AtomicU64 = AtomicU64::new(0);
+static ADMIN_DATA_USAGE_SNAPSHOT_CACHE: OnceLock<DataUsageSnapshotCache> = OnceLock::new();
+static ADMIN_DATA_USAGE_SNAPSHOT_REFRESH: OnceLock<Arc<TokioMutex<()>>> = OnceLock::new();
+static ADMIN_DATA_USAGE_SNAPSHOT_GENERATION: AtomicU64 = AtomicU64::new(0);
 
 // Always-on revert detector for rustfs/backlog#1306: one relaxed increment per
 // full-bucket version listing is negligible and lets tests prove that admin
@@ -200,11 +259,24 @@ fn data_usage_snapshot_generation() -> u64 {
     DATA_USAGE_SNAPSHOT_GENERATION.load(Ordering::Acquire)
 }
 
+fn admin_data_usage_snapshot_cache() -> &'static DataUsageSnapshotCache {
+    ADMIN_DATA_USAGE_SNAPSHOT_CACHE.get_or_init(|| Arc::new(RwLock::new(None)))
+}
+
+fn admin_data_usage_snapshot_generation() -> u64 {
+    ADMIN_DATA_USAGE_SNAPSHOT_GENERATION.load(Ordering::Acquire)
+}
+
 fn clear_data_usage_snapshot_cache(cache: &mut Option<CachedDataUsageSnapshot>) {
     DATA_USAGE_SNAPSHOT_GENERATION.fetch_add(1, Ordering::AcqRel);
     *cache = None;
 }
 
+fn clear_admin_data_usage_snapshot_cache(cache: &mut Option<CachedDataUsageSnapshot>) {
+    ADMIN_DATA_USAGE_SNAPSHOT_GENERATION.fetch_add(1, Ordering::AcqRel);
+    *cache = None;
+}
+
 fn live_bucket_usage_cache() -> &'static LiveBucketUsageCache {
     LIVE_BUCKET_USAGE_CACHE.get_or_init(|| {
         moka::future::Cache::builder()
@@ -229,6 +301,11 @@ lazy_static::lazy_static! {
         SLASH_SEPARATOR,
         DATA_USAGE_OBJECT_NAME
     );
+    pub static ref DATA_USAGE_OBSERVED_OBJ_NAME_PATH: String = format!("{}{}{}",
+        crate::disk::BUCKET_META_PREFIX,
+        SLASH_SEPARATOR,
+        DATA_USAGE_OBSERVED_OBJECT_NAME
+    );
     static ref DATA_USAGE_OBJ_BACKUP_PATH: String = format!("{}.bkp", DATA_USAGE_OBJ_NAME_PATH.as_str());
     static ref LEGACY_DATA_USAGE_OBJ_NAME_PATH: String = format!("{}{}{}",
         crate::disk::BUCKET_META_PREFIX,
@@ -303,6 +380,11 @@ fn stale_data_usage_persist_reason_for_source(
 /// Store data usage info to backend storage
 #[instrument(skip(store))]
 pub async fn store_data_usage_in_backend(data_usage_info: DataUsageInfo, store: Arc<ECStore>) -> Result<(), Error> {
+    if data_usage_info.usage_snapshot_converged == Some(false) {
+        return Err(Error::other(
+            "nonconverged data usage observations cannot replace the quota-authoritative snapshot",
+        ));
+    }
     // Prevent older data from overwriting newer persisted stats
     if let Ok((existing, source)) = load_data_usage_snapshot(store.clone()).await
         && source.is_authoritative()
@@ -323,10 +405,12 @@ async fn save_data_usage_in_backend(data_usage_info: DataUsageInfo, store: Arc<E
         serde_json::to_vec(&data_usage_info).map_err(|e| Error::other(format!("Failed to serialize data usage info: {e}")))?;
 
     // Save to backend using the same mechanism as original code
-    crate::config::com::save_config(store, &DATA_USAGE_OBJ_NAME_PATH, data)
+    crate::config::com::save_config(store.clone(), &DATA_USAGE_OBJ_NAME_PATH, data)
         .await
         .map_err(Error::other)?;
 
+    cleanup_observed_data_usage_after_authoritative_save(store.as_ref(), &data_usage_info).await;
+
     // Invalidate the cached snapshot so readers observe the new save on their
     // next request instead of waiting out the remaining TTL. The next cached
     // read reloads through `load_data_usage_from_backend`, keeping its
@@ -336,6 +420,64 @@ async fn save_data_usage_in_backend(data_usage_info: DataUsageInfo, store: Arc<E
     Ok(())
 }
 
+#[async_trait::async_trait]
+trait ObservedDataUsageSnapshotCleanup {
+    async fn delete_observed_data_usage_snapshot(&self, revision: &str) -> Result<(), Error>;
+}
+
+#[async_trait::async_trait]
+impl ObservedDataUsageSnapshotCleanup for ECStore {
+    async fn delete_observed_data_usage_snapshot(&self, revision: &str) -> Result<(), Error> {
+        self.delete_object(
+            RUSTFS_META_BUCKET,
+            DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
+            ObjectOptions {
+                delete_prefix: true,
+                delete_prefix_object: true,
+                http_preconditions: Some(HTTPPreconditions {
+                    if_match: Some(revision.to_string()),
+                    ..Default::default()
+                }),
+                ..Default::default()
+            },
+        )
+        .await
+        .map(|_| ())
+    }
+}
+
+async fn cleanup_observed_data_usage_after_authoritative_save<S>(store: &S, authoritative: &DataUsageInfo)
+where
+    S: EcstoreObjectIO + ObservedDataUsageSnapshotCleanup + ?Sized,
+{
+    let (observed, revision) = match load_data_usage_for_bucket_removal(store, DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str()).await {
+        Ok(Some(snapshot)) => snapshot,
+        Ok(None) => return,
+        Err(err) => {
+            record_usage_snapshot_failure(
+                "read_observed_before_authoritative_cleanup",
+                DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
+                &err,
+            );
+            return;
+        }
+    };
+    if observed_data_usage_is_newer(&observed, authoritative) {
+        return;
+    }
+
+    match store.delete_observed_data_usage_snapshot(&revision).await {
+        Ok(()) | Err(Error::ConfigNotFound | Error::FileNotFound | Error::ObjectNotFound(_, _) | Error::PreconditionFailed) => {}
+        Err(err) => {
+            record_usage_snapshot_failure(
+                "delete_observed_after_authoritative_save",
+                DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
+                &err,
+            );
+        }
+    }
+}
+
 fn set_buckets_count_from_usage(data_usage_info: &mut DataUsageInfo) {
     data_usage_info.buckets_count = u64::try_from(data_usage_info.buckets_usage.len()).unwrap_or(u64::MAX);
 }
@@ -389,6 +531,11 @@ pub(crate) async fn prepare_bucket_usage_for_namespace_change(
     let mut snapshot_cache = data_usage_snapshot_cache().write().await;
     ensure_bucket_namespace_guard(guard, bucket, "data usage snapshot cache cleanup")?;
     clear_data_usage_snapshot_cache(&mut snapshot_cache);
+    drop(snapshot_cache);
+
+    let mut admin_snapshot_cache = admin_data_usage_snapshot_cache().write().await;
+    ensure_bucket_namespace_guard(guard, bucket, "admin data usage snapshot cache cleanup")?;
+    clear_admin_data_usage_snapshot_cache(&mut admin_snapshot_cache);
     Ok(())
 }
 
@@ -404,6 +551,10 @@ where
     let mut snapshot_cache = data_usage_snapshot_cache().write().await;
     ensure_bucket_namespace_guard(guard, bucket, "data usage snapshot cache invalidation")?;
     clear_data_usage_snapshot_cache(&mut snapshot_cache);
+    drop(snapshot_cache);
+    let mut admin_snapshot_cache = admin_data_usage_snapshot_cache().write().await;
+    ensure_bucket_namespace_guard(guard, bucket, "admin data usage snapshot cache invalidation")?;
+    clear_admin_data_usage_snapshot_cache(&mut admin_snapshot_cache);
     result
 }
 
@@ -497,6 +648,23 @@ where
     )
     .await?;
 
+    ensure_bucket_namespace_guard(guard, bucket, "observed data usage cleanup")?;
+    if let Err(err) = remove_bucket_usage_from_object_with_retries(
+        store,
+        DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
+        bucket,
+        DATA_USAGE_REMOVE_CAS_RETRIES,
+        None,
+        guard,
+    )
+    .await
+    {
+        // The authoritative timestamp was already advanced above, so admin
+        // selection rejects this observation even if optional cleanup fails.
+        // Never make an admin-only freshness artifact block DeleteBucket.
+        record_usage_snapshot_failure("remove_bucket_from_observed", DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(), &err);
+    }
+
     for object in [
         LEGACY_DATA_USAGE_OBJ_NAME_PATH.as_str(),
         LEGACY_DATA_USAGE_OBJ_BACKUP_PATH.as_str(),
@@ -761,10 +929,72 @@ async fn load_data_usage_snapshot(store: Arc<ECStore>) -> Result<(DataUsageInfo,
 /// Load data usage info from backend storage
 #[instrument(skip(store))]
 pub async fn load_data_usage_from_backend(store: Arc<ECStore>) -> Result<DataUsageInfo, Error> {
+    Ok(load_data_usage_from_backend_with_baseline(store).await?.0)
+}
+
+/// Like [`load_data_usage_from_backend`], but also returns the pre-discard
+/// per-bucket sizes so the cached loader can retain them as the degraded
+/// quota-admission baseline (issue #5716).
+async fn load_data_usage_from_backend_with_baseline(store: Arc<ECStore>) -> Result<(DataUsageInfo, HashMap<String, u64>), Error> {
     let (data_usage_info, source) = load_data_usage_snapshot(store).await?;
     Ok(normalize_loaded_data_usage(data_usage_info, source.is_authoritative()).await)
 }
 
+async fn load_observed_data_usage_snapshot(store: Arc<ECStore>) -> Option<DataUsageInfo> {
+    let data = match read_config_preserve_empty(store, &DATA_USAGE_OBSERVED_OBJ_NAME_PATH).await {
+        Ok(data) => data,
+        Err(Error::ConfigNotFound) => return None,
+        Err(err) => {
+            record_usage_snapshot_failure("read_observed", DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(), &err);
+            return None;
+        }
+    };
+
+    match parse_usage_snapshot(&data) {
+        Ok(info) if info.usage_snapshot_converged == Some(false) && info.is_complete_bucket_usage_snapshot() => Some(info),
+        Ok(_) => {
+            error!(
+                event = "data_usage_snapshot_load_failed",
+                component = "ecstore",
+                subsystem = "data_usage",
+                state = "invalid_observed_snapshot",
+                object = %DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(),
+                "observed data usage snapshot was not a structurally complete nonconverged view"
+            );
+            None
+        }
+        Err(err) => {
+            record_usage_snapshot_decode_failure("parse_observed", DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str(), &err);
+            None
+        }
+    }
+}
+
+fn select_admin_data_usage_snapshot(
+    mut authoritative: DataUsageInfo,
+    authoritative_format: bool,
+    observed: Option<DataUsageInfo>,
+) -> (DataUsageInfo, bool) {
+    if authoritative_format
+        && authoritative.is_complete_bucket_usage_snapshot()
+        && authoritative.usage_snapshot_converged.is_none()
+    {
+        authoritative.usage_snapshot_converged = Some(true);
+    }
+    match observed {
+        Some(observed) if observed_data_usage_is_newer(&observed, &authoritative) => (observed, true),
+        _ => (authoritative, authoritative_format),
+    }
+}
+
+async fn load_admin_data_usage_from_backend(store: Arc<ECStore>) -> Result<DataUsageInfo, Error> {
+    let (authoritative, source) = load_data_usage_snapshot(store.clone()).await?;
+    let observed = load_observed_data_usage_snapshot(store).await;
+    let (selected, selected_is_current_format) =
+        select_admin_data_usage_snapshot(authoritative, source.is_authoritative(), observed);
+    Ok(normalize_loaded_data_usage(selected, selected_is_current_format).await.0)
+}
+
 fn discard_incomplete_bucket_usage(data_usage_info: &mut DataUsageInfo) {
     if !data_usage_info.is_complete_bucket_usage_snapshot() {
         data_usage_info.usage_snapshot_complete = false;
@@ -807,7 +1037,13 @@ fn populate_backward_compatible_usage_maps(data_usage_info: &mut DataUsageInfo)
     }
 }
 
-async fn normalize_loaded_data_usage(mut data_usage_info: DataUsageInfo, authoritative_format: bool) -> DataUsageInfo {
+/// Returns the normalized snapshot plus the pre-discard per-bucket sizes: the
+/// degraded quota-admission baseline captured before an incomplete snapshot
+/// drops its bucket data (issue #5716).
+async fn normalize_loaded_data_usage(
+    mut data_usage_info: DataUsageInfo,
+    authoritative_format: bool,
+) -> (DataUsageInfo, HashMap<String, u64>) {
     info!("Loaded data usage info from backend with {} buckets", data_usage_info.buckets_count);
 
     if !authoritative_format {
@@ -815,6 +1051,7 @@ async fn normalize_loaded_data_usage(mut data_usage_info: DataUsageInfo, authori
     }
     populate_backward_compatible_usage_maps(&mut data_usage_info);
     validate_complete_usage_snapshot(&mut data_usage_info);
+    let degraded_baseline = data_usage_info.bucket_sizes.clone();
     discard_incomplete_bucket_usage(&mut data_usage_info);
 
     // Handle replication info
@@ -840,7 +1077,7 @@ async fn normalize_loaded_data_usage(mut data_usage_info: DataUsageInfo, authori
         }
     }
 
-    data_usage_info
+    (data_usage_info, degraded_baseline)
 }
 
 /// Load the persisted data usage snapshot through a small in-process cache.
@@ -873,10 +1110,58 @@ pub async fn load_data_usage_from_backend_cached(store: Arc<ECStore>) -> Result<
         }
 
         let refresh_generation = data_usage_snapshot_generation();
-        let result = load_data_usage_from_backend(store.clone()).await;
+        let result = load_data_usage_from_backend_with_baseline(store.clone()).await;
         let loaded_at = tokio::time::Instant::now();
         let mut cache = data_usage_snapshot_cache().write().await;
-        if let Some(result) = cache_data_usage_snapshot_result(&mut cache, result, loaded_at, refresh_generation) {
+        if let Some(result) =
+            cache_data_usage_snapshot_result(&mut cache, result, loaded_at, refresh_generation, data_usage_snapshot_generation())
+        {
+            return result;
+        }
+        drop(cache);
+        drop(refresh_guard);
+    }
+}
+
+/// Load the freshest structurally complete snapshot for authenticated admin
+/// observability. A scan raced by namespace activity may be selected here, but
+/// never by [`load_data_usage_from_backend_cached`], which remains the
+/// converged source for quota admission.
+pub async fn load_admin_data_usage_from_backend_cached(store: Arc<ECStore>) -> Result<DataUsageInfo, Error> {
+    let ttl = Duration::from_secs(DATA_USAGE_CACHE_TTL_SECS);
+
+    loop {
+        {
+            let cache = admin_data_usage_snapshot_cache().read().await;
+            if let Some(result) = fresh_cached_data_usage_snapshot(&cache, tokio::time::Instant::now(), ttl) {
+                return result;
+            }
+        }
+
+        let refresh_guard = ADMIN_DATA_USAGE_SNAPSHOT_REFRESH
+            .get_or_init(|| Arc::new(TokioMutex::new(())))
+            .lock()
+            .await;
+        {
+            let cache = admin_data_usage_snapshot_cache().read().await;
+            if let Some(result) = fresh_cached_data_usage_snapshot(&cache, tokio::time::Instant::now(), ttl) {
+                return result;
+            }
+        }
+
+        let refresh_generation = admin_data_usage_snapshot_generation();
+        let result = load_admin_data_usage_from_backend(store.clone())
+            .await
+            .map(|info| (info, HashMap::new()));
+        let loaded_at = tokio::time::Instant::now();
+        let mut cache = admin_data_usage_snapshot_cache().write().await;
+        if let Some(result) = cache_data_usage_snapshot_result(
+            &mut cache,
+            result,
+            loaded_at,
+            refresh_generation,
+            admin_data_usage_snapshot_generation(),
+        ) {
             return result;
         }
         drop(cache);
@@ -889,6 +1174,16 @@ pub async fn load_data_usage_from_backend_cached(store: Arc<ECStore>) -> Result<
 pub async fn invalidate_data_usage_snapshot_cache() {
     let mut cache = data_usage_snapshot_cache().write().await;
     clear_data_usage_snapshot_cache(&mut cache);
+
+    let mut admin_cache = admin_data_usage_snapshot_cache().write().await;
+    clear_admin_data_usage_snapshot_cache(&mut admin_cache);
+}
+
+/// Invalidate only the admin/console view after an observational save. Quota
+/// admission continues to use the independently cached converged snapshot.
+pub async fn invalidate_admin_data_usage_snapshot_cache() {
+    let mut cache = admin_data_usage_snapshot_cache().write().await;
+    clear_admin_data_usage_snapshot_cache(&mut cache);
 }
 
 /// Aggregate usage information from local disk snapshots.
@@ -2012,6 +2307,7 @@ mod tests {
     struct UsageCasState {
         object: Option<(Vec<u8>, u64)>,
         backup_object: Option<(Vec<u8>, u64)>,
+        observed_object: Option<(Vec<u8>, u64)>,
         legacy_object: Option<(Vec<u8>, u64)>,
         legacy_backup_object: Option<(Vec<u8>, u64)>,
         interleaving_snapshot: Option<Vec<u8>>,
@@ -2031,10 +2327,24 @@ mod tests {
         state: Mutex<UsageCasState>,
     }
 
+    #[async_trait::async_trait]
+    impl ObservedDataUsageSnapshotCleanup for UsageCasStore {
+        async fn delete_observed_data_usage_snapshot(&self, revision: &str) -> Result<(), Error> {
+            let mut state = self.state.lock().await;
+            let current = state.observed_object.as_ref().ok_or(Error::FileNotFound)?.1;
+            if revision != format!("usage-{current}") {
+                return Err(Error::PreconditionFailed);
+            }
+            state.observed_object = None;
+            Ok(())
+        }
+    }
+
     #[derive(Clone, Copy, Debug, PartialEq, Eq)]
     enum UsageObjectSlot {
         Primary,
         Backup,
+        Observed,
         LegacyPrimary,
         LegacyBackup,
     }
@@ -2063,6 +2373,7 @@ mod tests {
             let slot = match object {
                 object if object == DATA_USAGE_OBJ_NAME_PATH.as_str() => UsageObjectSlot::Primary,
                 object if object == DATA_USAGE_OBJ_BACKUP_PATH.as_str() => UsageObjectSlot::Backup,
+                object if object == DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str() => UsageObjectSlot::Observed,
                 object if object == LEGACY_DATA_USAGE_OBJ_NAME_PATH.as_str() => UsageObjectSlot::LegacyPrimary,
                 object if object == LEGACY_DATA_USAGE_OBJ_BACKUP_PATH.as_str() => UsageObjectSlot::LegacyBackup,
                 _ => return Err(Error::FileNotFound),
@@ -2071,6 +2382,7 @@ mod tests {
             let stored = match slot {
                 UsageObjectSlot::Primary => &state.object,
                 UsageObjectSlot::Backup => &state.backup_object,
+                UsageObjectSlot::Observed => &state.observed_object,
                 UsageObjectSlot::LegacyPrimary => &state.legacy_object,
                 UsageObjectSlot::LegacyBackup => &state.legacy_backup_object,
             };
@@ -2110,6 +2422,7 @@ mod tests {
             let slot = match object {
                 object if object == DATA_USAGE_OBJ_NAME_PATH.as_str() => UsageObjectSlot::Primary,
                 object if object == DATA_USAGE_OBJ_BACKUP_PATH.as_str() => UsageObjectSlot::Backup,
+                object if object == DATA_USAGE_OBSERVED_OBJ_NAME_PATH.as_str() => UsageObjectSlot::Observed,
                 object if object == LEGACY_DATA_USAGE_OBJ_NAME_PATH.as_str() => UsageObjectSlot::LegacyPrimary,
                 object if object == LEGACY_DATA_USAGE_OBJ_BACKUP_PATH.as_str() => UsageObjectSlot::LegacyBackup,
                 _ => return Err(Error::FileNotFound),
@@ -2145,6 +2458,9 @@ mod tests {
                 let revision = state.backup_object.as_ref().map_or(1, |(_, revision)| revision + 1);
                 state.backup_object = Some((interleaving, revision));
             }
+            if slot == UsageObjectSlot::Observed {
+                return Err(Error::other("observed test fixture writes are injected directly"));
+            }
             if slot == UsageObjectSlot::LegacyPrimary
                 && let Some(interleaving) = state.interleaving_legacy_snapshot.take()
             {
@@ -2160,6 +2476,7 @@ mod tests {
             let current_revision = match slot {
                 UsageObjectSlot::Primary => state.object.as_ref(),
                 UsageObjectSlot::Backup => state.backup_object.as_ref(),
+                UsageObjectSlot::Observed => state.observed_object.as_ref(),
                 UsageObjectSlot::LegacyPrimary => state.legacy_object.as_ref(),
                 UsageObjectSlot::LegacyBackup => state.legacy_backup_object.as_ref(),
             }
@@ -2190,6 +2507,7 @@ mod tests {
             match slot {
                 UsageObjectSlot::Primary => state.object = Some((buf, revision)),
                 UsageObjectSlot::Backup => state.backup_object = Some((buf, revision)),
+                UsageObjectSlot::Observed => state.observed_object = Some((buf, revision)),
                 UsageObjectSlot::LegacyPrimary => state.legacy_object = Some((buf, revision)),
                 UsageObjectSlot::LegacyBackup => state.legacy_backup_object = Some((buf, revision)),
             }
@@ -2361,7 +2679,7 @@ mod tests {
         legacy.bucket_sizes.insert("large".to_string(), 0);
         legacy.buckets_count = 2;
 
-        let normalized = normalize_loaded_data_usage(legacy, false).await;
+        let (normalized, degraded_baseline) = normalize_loaded_data_usage(legacy, false).await;
 
         assert_eq!(normalized.buckets_count, 0);
         assert!(normalized.buckets_usage.is_empty());
@@ -2369,6 +2687,10 @@ mod tests {
         assert_eq!(normalized.objects_total_count, 0);
         assert_eq!(normalized.objects_total_size, 0);
         assert!(!normalized.usage_snapshot_complete);
+        // Issue #5716: the discarded sizes must survive as the degraded
+        // quota-admission baseline.
+        assert_eq!(degraded_baseline.get("control").copied(), Some(10_285));
+        assert_eq!(degraded_baseline.get("large").copied(), Some(0));
     }
 
     #[test]
@@ -2404,7 +2726,7 @@ mod tests {
         info.buckets_usage.insert("empty".to_string(), BucketUsageInfo::default());
         info.buckets_count = 2;
 
-        let normalized = normalize_loaded_data_usage(info, true).await;
+        let (normalized, _) = normalize_loaded_data_usage(info, true).await;
 
         assert_eq!(normalized.buckets_count, 2);
         assert!(normalized.usage_snapshot_complete);
@@ -2439,7 +2761,7 @@ mod tests {
         info.bucket_sizes.insert("partial".to_string(), 196_870_144);
         info.buckets_count = 1;
 
-        let normalized = normalize_loaded_data_usage(info, true).await;
+        let (normalized, _) = normalize_loaded_data_usage(info, true).await;
 
         assert_eq!(normalized.buckets_count, 0);
         assert!(!normalized.buckets_usage.contains_key("control"));
@@ -2454,7 +2776,7 @@ mod tests {
         info.buckets_count = 2;
 
         assert!(!data_usage_contains_bucket(&info, "missing"));
-        let normalized = normalize_loaded_data_usage(info, true).await;
+        let (normalized, _) = normalize_loaded_data_usage(info, true).await;
 
         assert!(!normalized.usage_snapshot_complete);
         assert!(normalized.buckets_usage.is_empty());
@@ -2463,7 +2785,7 @@ mod tests {
 
     #[tokio::test]
     async fn complete_empty_snapshot_remains_authoritative() {
-        let normalized = normalize_loaded_data_usage(
+        let (normalized, _) = normalize_loaded_data_usage(
             DataUsageInfo {
                 last_update: Some(SystemTime::UNIX_EPOCH),
                 usage_snapshot_complete: true,
@@ -2478,6 +2800,71 @@ mod tests {
         assert!(normalized.buckets_usage.is_empty());
     }
 
+    #[test]
+    fn admin_snapshot_selection_requires_the_current_authoritative_baseline() {
+        let authoritative = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH),
+            scanner_epoch: Some(4),
+            scanner_cycle: Some(10),
+            usage_snapshot_complete: true,
+            ..Default::default()
+        };
+        let observed = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(1)),
+            scanner_epoch: Some(4),
+            scanner_cycle: Some(11),
+            usage_snapshot_complete: true,
+            usage_snapshot_converged: Some(false),
+            usage_snapshot_authoritative_baseline: Some(authoritative.snapshot_identity()),
+            ..Default::default()
+        };
+
+        let (selected, _) = select_admin_data_usage_snapshot(authoritative.clone(), true, Some(observed.clone()));
+        assert_eq!(selected.usage_snapshot_converged, Some(false));
+
+        let mut namespace_changed = authoritative;
+        namespace_changed.last_update = Some(SystemTime::UNIX_EPOCH + Duration::from_secs(2));
+        let (selected, _) = select_admin_data_usage_snapshot(namespace_changed, true, Some(observed));
+        assert_eq!(selected.usage_snapshot_converged, Some(true));
+    }
+
+    #[tokio::test]
+    async fn authoritative_save_cleanup_removes_observed_snapshot_best_effort() {
+        let store = UsageCasStore::default();
+        let authoritative = data_usage_info_for_test("bucket", 1, 10, SystemTime::UNIX_EPOCH + Duration::from_secs(2));
+        let stale_observed = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(1)),
+            scanner_epoch: Some(4),
+            scanner_cycle: Some(10),
+            usage_snapshot_complete: true,
+            usage_snapshot_converged: Some(false),
+            ..Default::default()
+        };
+        store.state.lock().await.observed_object =
+            Some((serde_json::to_vec(&stale_observed).expect("observed snapshot should encode"), 1));
+
+        cleanup_observed_data_usage_after_authoritative_save(&store, &authoritative).await;
+        assert!(store.state.lock().await.observed_object.is_none());
+
+        cleanup_observed_data_usage_after_authoritative_save(&store, &authoritative).await;
+        assert!(store.state.lock().await.observed_object.is_none());
+
+        let newer_observed = DataUsageInfo {
+            last_update: Some(SystemTime::UNIX_EPOCH + Duration::from_secs(3)),
+            scanner_epoch: Some(4),
+            scanner_cycle: Some(11),
+            usage_snapshot_complete: true,
+            usage_snapshot_converged: Some(false),
+            usage_snapshot_authoritative_baseline: Some(authoritative.snapshot_identity()),
+            ..Default::default()
+        };
+        store.state.lock().await.observed_object =
+            Some((serde_json::to_vec(&newer_observed).expect("observed snapshot should encode"), 2));
+
+        cleanup_observed_data_usage_after_authoritative_save(&store, &authoritative).await;
+        assert!(store.state.lock().await.observed_object.is_some());
+    }
+
     #[test]
     #[serial]
     fn cached_snapshot_failure_is_reused_until_ttl_expires() {
@@ -2485,8 +2872,14 @@ mod tests {
         let mut cache = None;
         let refresh_generation = data_usage_snapshot_generation();
 
-        let first = cache_data_usage_snapshot_result(&mut cache, Err(Error::ErasureReadQuorum), loaded_at, refresh_generation)
-            .expect("an uninterrupted refresh should populate the cache");
+        let first = cache_data_usage_snapshot_result(
+            &mut cache,
+            Err(Error::ErasureReadQuorum),
+            loaded_at,
+            refresh_generation,
+            data_usage_snapshot_generation(),
+        )
+        .expect("an uninterrupted refresh should populate the cache");
         assert!(matches!(first, Err(Error::ErasureReadQuorum)));
 
         let cached = fresh_cached_data_usage_snapshot(&cache, loaded_at + Duration::from_secs(1), Duration::from_secs(30))
@@ -2504,9 +2897,15 @@ mod tests {
         let mut cache = None;
         let refresh_generation = data_usage_snapshot_generation();
 
-        let first = cache_data_usage_snapshot_result(&mut cache, Ok(expected), loaded_at, refresh_generation)
-            .expect("an uninterrupted refresh should populate the cache")
-            .expect("successful load must be returned");
+        let first = cache_data_usage_snapshot_result(
+            &mut cache,
+            Ok((expected, HashMap::new())),
+            loaded_at,
+            refresh_generation,
+            data_usage_snapshot_generation(),
+        )
+        .expect("an uninterrupted refresh should populate the cache")
+        .expect("successful load must be returned");
         assert_snapshot_bucket(&first, "bucket");
 
         let cached = fresh_cached_data_usage_snapshot(&cache, loaded_at + Duration::from_secs(1), Duration::from_secs(30))
@@ -2523,14 +2922,16 @@ mod tests {
         let mut cache = Some(CachedDataUsageSnapshot {
             info: Some(data_usage_info_for_test("stale", 1, 42, SystemTime::UNIX_EPOCH)),
             loaded_at,
+            degraded_baseline: HashMap::new(),
         });
         clear_data_usage_snapshot_cache(&mut cache);
 
         let stale_result = cache_data_usage_snapshot_result(
             &mut cache,
-            Ok(data_usage_info_for_test("stale", 1, 42, SystemTime::UNIX_EPOCH)),
+            Ok((data_usage_info_for_test("stale", 1, 42, SystemTime::UNIX_EPOCH), HashMap::new())),
             loaded_at,
             refresh_generation,
+            data_usage_snapshot_generation(),
         );
 
         assert!(stale_result.is_none());
@@ -3533,6 +3934,7 @@ mod tests {
         *snapshot_cache = Some(CachedDataUsageSnapshot {
             info: Some(successor),
             loaded_at: tokio::time::Instant::now(),
+            degraded_baseline: HashMap::new(),
         });
         memory_cache()
             .write()
@@ -3595,6 +3997,7 @@ mod tests {
         *snapshot_cache = Some(CachedDataUsageSnapshot {
             info: Some(successor),
             loaded_at: tokio::time::Instant::now(),
+            degraded_baseline: HashMap::new(),
         });
 
         let store_for_cleanup = store.clone();
@@ -3646,6 +4049,7 @@ mod tests {
         *data_usage_snapshot_cache().write().await = Some(CachedDataUsageSnapshot {
             info: Some(stale),
             loaded_at: tokio::time::Instant::now(),
+            degraded_baseline: HashMap::new(),
         });
 
         remove_bucket_usage_from_backend_with_guard(&store, BUCKET, None)

crates/ecstore/src/diagnostics/get.rs

@@ -24,6 +24,7 @@ pub(crate) const GET_OBJECT_PATH_EMPTY: &str = "empty";
 pub(crate) const GET_OBJECT_PATH_DIRECT_MEMORY: &str = "direct_memory";
 pub(crate) const GET_OBJECT_PATH_BODY_CACHE: &str = "body_cache";
 pub(crate) const GET_OBJECT_PATH_INLINE_DIRECT: &str = "inline_direct";
+pub(crate) const GET_OBJECT_PATH_INTERNAL_META: &str = "internal_meta";
 pub(crate) const GET_OBJECT_PATH_LEGACY_DUPLEX: &str = "legacy_duplex";
 pub(crate) const GET_OBJECT_PATH_REMOTE_TRANSITION: &str = "remote_transition";
 pub(crate) const GET_OBJECT_PATH_SET_DISK: &str = "set_disk";
@@ -163,6 +164,7 @@ pub(crate) enum GetObjectFailureReason {
     DecodeError,
     DownstreamClosed,
     Io,
+    MetadataMissing,
     RangeOrLengthInvalid,
     ReadQuorum,
     ShortRead,
@@ -177,6 +179,7 @@ impl GetObjectFailureReason {
             Self::DecodeError => "decode_error",
             Self::DownstreamClosed => "downstream_closed",
             Self::Io => "io",
+            Self::MetadataMissing => "metadata_missing",
             Self::RangeOrLengthInvalid => "range_or_length_invalid",
             Self::ReadQuorum => "read_quorum",
             Self::ShortRead => "short_read",
@@ -190,6 +193,13 @@ pub(crate) fn classify_storage_error(err: &StorageError) -> GetObjectFailureReas
     match err {
         StorageError::ErasureReadQuorum | StorageError::InsufficientReadQuorum(_, _) => GetObjectFailureReason::ReadQuorum,
         StorageError::FileCorrupt => GetObjectFailureReason::BitrotMismatch,
+        StorageError::FileNotFound
+        | StorageError::FileVersionNotFound
+        | StorageError::VolumeNotFound
+        | StorageError::BucketNotFound(_)
+        | StorageError::ObjectNotFound(_, _)
+        | StorageError::VersionNotFound(_, _, _)
+        | StorageError::ConfigNotFound => GetObjectFailureReason::MetadataMissing,
         StorageError::InvalidRangeSpec(_) => GetObjectFailureReason::RangeOrLengthInvalid,
         StorageError::Io(io_err) => classify_io_error(io_err),
         _ => GetObjectFailureReason::Unknown,
@@ -293,6 +303,34 @@ mod tests {
             classify_storage_error(&StorageError::InvalidRangeSpec("bad range".to_string())),
             GetObjectFailureReason::RangeOrLengthInvalid
         );
+        assert_eq!(
+            classify_storage_error(&StorageError::FileNotFound),
+            GetObjectFailureReason::MetadataMissing
+        );
+        assert_eq!(
+            classify_storage_error(&StorageError::VolumeNotFound),
+            GetObjectFailureReason::MetadataMissing
+        );
+        assert_eq!(
+            classify_storage_error(&StorageError::ObjectNotFound("bucket".to_string(), "object".to_string())),
+            GetObjectFailureReason::MetadataMissing
+        );
+        assert_eq!(
+            classify_storage_error(&StorageError::BucketNotFound("bucket".to_string())),
+            GetObjectFailureReason::MetadataMissing
+        );
+        assert_eq!(
+            classify_storage_error(&StorageError::VersionNotFound(
+                "bucket".to_string(),
+                "object".to_string(),
+                "version".to_string()
+            )),
+            GetObjectFailureReason::MetadataMissing
+        );
+        assert_eq!(
+            classify_storage_error(&StorageError::ConfigNotFound),
+            GetObjectFailureReason::MetadataMissing
+        );
 
         let internal_broken_pipe = StorageError::Io(io::Error::from(io::ErrorKind::BrokenPipe));
         assert_eq!(classify_storage_error(&internal_broken_pipe), GetObjectFailureReason::Io);
@@ -354,10 +392,12 @@ mod tests {
         assert_eq!(GetObjectFailureReason::DownstreamClosed.as_str(), "downstream_closed");
         assert_eq!(GetObjectFailureReason::BitrotMismatch.as_str(), "bitrot_mismatch");
         assert_eq!(GetObjectFailureReason::DecodeError.as_str(), "decode_error");
+        assert_eq!(GetObjectFailureReason::MetadataMissing.as_str(), "metadata_missing");
         assert_eq!(GET_READER_BUFFER_OUTPUT, "output");
         assert_eq!(GET_READER_BUFFER_PREFETCH, "prefetch");
         assert_eq!(GET_OBJECT_PATH_CODEC_STREAMING_LEGACY_ENGINE, "codec_streaming_legacy_engine");
         assert_eq!(GET_OBJECT_PATH_CODEC_STREAMING_RUSTFS_ENGINE, "codec_streaming_rustfs_engine");
+        assert_eq!(GET_OBJECT_PATH_INTERNAL_META, "internal_meta");
         assert_eq!(GET_DIRECT_MEMORY_DECISION_USE, "use");
         assert_eq!(GET_DIRECT_MEMORY_DECISION_FALLBACK, "fallback");
         assert_eq!(GET_DIRECT_MEMORY_REASON_NONE, "none");