chore(ecstore): drop the set_disk dead_code blanket

Removing the blanket exposes 39 items; exactly one is deleted. The low share is a finding, not caution: unlike the disk root, where platform gating made local adjudication impossible, here the items were checked and nearly all of them are live. Deleted: HealEntryResult, the only item with no reference anywhere. What the checks turned up, in the order the warnings suggest deleting them: SetDisks::rename_data looked like the head of a dead chain feeding into_legacy_tuple and RenameDataLegacyTuple. It is not: production goes through rename_data_owned, and rename_data itself has test callers at mod.rs:5809 and 5880. The chain below it is therefore live through the tests, and inferring "this is dead, so its callee is dead" would have removed three working items. create_bitrot_readers_until_quorum, read_multiple_files and map_cleanup_join_result all have callers inside their files' test modules, so they only look dead in the lib target. TransitionCommitBarrier and TransitionUploadedSaveProbe, with their install/wait_until_paused/release surfaces, are installed by tests behind #[cfg(all(test, feature = "test-util"))]. ctx.rs's SetDisksCtx accessors are the split seam left by the SetDisks god-object break-up (backlog#815). heal_object_dir's two apparent references are comments, and they document an index-alignment contract that live code maintains for it, so they stay as they are. Worth a maintainer decision: the metadata early-stop switch has a complete percentage-rollout facet — ENV_RUSTFS_GET_METADATA_EARLY_STOP_ROLLOUT_PCT, get_metadata_early_stop_rollout_pct and should_use_metadata_early_stop — with no caller, no test and no documentation, while its sibling enable flag is live. It is kept with an allow that says so rather than removed, since a rollout knob is a product call. One placement note for anyone adding allows near heal code: check_logging_guardrails.sh requires #[instrument(level = "trace")] to sit immediately before async fn heal_object_dir, so the allow goes above the instrument attribute. Putting it between the two drops the guard's match count and fails the check. Verification, four lanes warning-free: default, --tests, --features rio-v2 --tests, --features test-util --tests. cargo nextest run -p rustfs-ecstore 4096 passed; clippy --lib --tests -D warnings clean; make pre-commit exit 0. Ref rustfs/backlog#1823 (step 2).
chore(ecstore): drop the client dead_code blanket (#6138 )
2026-08-16 09:58:21 +00:00 · 2026-08-16 12:47:29 +08:00 · 2026-08-16 03:20:52 +00:00 · 2026-08-16 10:28:45 +08:00 · 2026-08-16 10:28:11 +08:00 · 2026-08-16 10:27:59 +08:00
133 changed files with 16856 additions and 3784 deletions
@@ -252,10 +252,16 @@ test-group = 'ecstore-serial-flaky'
 # cluster, so it keeps the lane's parallel-safe / no-external-dependency
 # properties. The RustFS warm backend has no loopback guard (that guard is
 # replication-only), so it needs no opt-in env for its 127.0.0.1 tier target.
+#
+# Disk compression (backlog#1848): the `compression` module joins the smoke
+# lane so the multipart disk-compression roundtrips (restored after
+# rustfs/rustfs#5169 disabled them) have PR-lane signal, not just merge-gate.
+# Single-node servers on random ports with isolated temp dirs — meets the
+# admission criteria unchanged.
 [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|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(/^(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|compression|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::/)
@@ -94,6 +94,7 @@ jobs:
      short_sha: ${{ steps.check.outputs.short_sha }}
      is_prerelease: ${{ steps.check.outputs.is_prerelease }}
      create_latest: ${{ steps.check.outputs.create_latest }}
+      source_ref: ${{ steps.check.outputs.source_ref }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
@@ -118,6 +119,7 @@ jobs:
          short_sha=""
          is_prerelease=false
          create_latest=false
+          source_ref="$GITHUB_SHA"

          if [[ "${{ github.event_name }}" == "workflow_run" ]]; then
            # Triggered by build workflow completion
@@ -137,6 +139,7 @@ jobs:
            # Extract version info from commit message or use commit SHA
            # Use Git to generate consistent short SHA (ensures uniqueness like build.yml)
            short_sha=$(git rev-parse --short "$HEAD_SHA")
+            source_ref="$HEAD_SHA"

            # Determine build type based on triggering workflow event and ref
            triggering_event="$TRIGGERING_EVENT"
@@ -261,6 +264,23 @@ jobs:
                echo "⚠️  Only release versions (latest, v1.0.0, 1.0.0) and prereleases (v1.0.0-alpha1, 1.0.0-beta2) are supported"
                ;;
            esac
+
+            if [[ "$should_build" == true && "$input_version" != "latest" ]]; then
+              tag_ref="refs/tags/$input_version"
+              if ! git ls-remote --exit-code origin "$tag_ref" >/dev/null 2>&1; then
+                if [[ "$input_version" == v* ]]; then
+                  tag_ref="refs/tags/${input_version#v}"
+                else
+                  tag_ref="refs/tags/v$input_version"
+                fi
+              fi
+
+              if ! git ls-remote --exit-code origin "$tag_ref" >/dev/null 2>&1; then
+                echo "❌ Release tag not found for Docker build: $input_version"
+                exit 1
+              fi
+              source_ref="$tag_ref"
+            fi
          fi

          {
@@ -271,6 +291,7 @@ jobs:
            echo "short_sha=$short_sha"
            echo "is_prerelease=$is_prerelease"
            echo "create_latest=$create_latest"
+            echo "source_ref=$source_ref"
          } >> "$GITHUB_OUTPUT"

          echo "🐳 Docker Build Summary:"
@@ -281,6 +302,7 @@ jobs:
          echo "  - Short SHA: $short_sha"
          echo "  - Is prerelease: $is_prerelease"
          echo "  - Create latest: $create_latest"
+          echo "  - Source ref: $source_ref"

  # Build multi-arch Docker images
  # Strategy: Build images using pre-built binaries from dl.rustfs.com
@@ -308,6 +330,7 @@ jobs:
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false
+          ref: ${{ needs.build-check.outputs.source_ref }}

      - name: Login to Docker Hub
        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
@@ -397,7 +420,8 @@ jobs:
          LABELS="org.opencontainers.image.title=RustFS"
          LABELS="$LABELS,org.opencontainers.image.description=RustFS distributed object storage system"
          LABELS="$LABELS,org.opencontainers.image.version=$VERSION"
-          LABELS="$LABELS,org.opencontainers.image.revision=${{ github.sha }}"
+          SOURCE_REVISION="$(git rev-parse HEAD)"
+          LABELS="$LABELS,org.opencontainers.image.revision=$SOURCE_REVISION"
          LABELS="$LABELS,org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}"
          LABELS="$LABELS,org.opencontainers.image.created=$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
          LABELS="$LABELS,org.opencontainers.image.build-type=$BUILD_TYPE"
@@ -278,6 +278,7 @@ checksum = "312c1ea69e5fe9966e0029fb95aca8790100b85aff4f0d3b00a9337c74069a9c"
 dependencies = [
 "bigdecimal",
 "bon",
+ "crc32fast",
 "digest 0.11.3",
 "log",
 "miniz_oxide 0.9.1",
@@ -289,9 +290,11 @@ dependencies = [
 "serde",
 "serde_bytes",
 "serde_json",
+ "snap",
 "strum",
 "thiserror 2.0.20",
 "uuid",
+ "zstd",
 ]

 [[package]]
@@ -3761,7 +3764,7 @@ checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"

 [[package]]
 name = "e2e_test"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "anyhow",
 "astral-tokio-tar",
@@ -9090,7 +9093,7 @@ dependencies = [

 [[package]]
 name = "rustfs"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "aes-gcm",
 "anyhow",
@@ -9200,6 +9203,7 @@ dependencies = [
 "serial_test",
 "sha2 0.11.0",
 "shadow-rs",
+ "snap",
 "socket2",
 "subtle",
 "sysinfo",
@@ -9227,7 +9231,7 @@ dependencies = [

 [[package]]
 name = "rustfs-audit"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "const-str",
@@ -9250,7 +9254,7 @@ dependencies = [

 [[package]]
 name = "rustfs-checksums"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "base64-simd",
 "bytes",
@@ -9266,7 +9270,7 @@ dependencies = [

 [[package]]
 name = "rustfs-common"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "chrono",
 "hotpath",
@@ -9284,7 +9288,7 @@ dependencies = [

 [[package]]
 name = "rustfs-concurrency"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "insta",
@@ -9297,7 +9301,7 @@ dependencies = [

 [[package]]
 name = "rustfs-config"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "const-str",
 "hotpath",
@@ -9307,7 +9311,7 @@ dependencies = [

 [[package]]
 name = "rustfs-credentials"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "base64-simd",
 "hmac 0.13.0",
@@ -9321,7 +9325,7 @@ dependencies = [

 [[package]]
 name = "rustfs-crypto"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "aes-gcm",
 "argon2",
@@ -9342,7 +9346,7 @@ dependencies = [

 [[package]]
 name = "rustfs-data-usage"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "rmp-serde",
@@ -9352,7 +9356,7 @@ dependencies = [

 [[package]]
 name = "rustfs-ecstore"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "async-channel",
@@ -9491,7 +9495,7 @@ dependencies = [

 [[package]]
 name = "rustfs-extension-schema"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "serde",
@@ -9501,7 +9505,7 @@ dependencies = [

 [[package]]
 name = "rustfs-filemeta"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "byteorder",
@@ -9528,7 +9532,7 @@ dependencies = [

 [[package]]
 name = "rustfs-heal"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "base64 0.23.1",
@@ -9559,7 +9563,7 @@ dependencies = [

 [[package]]
 name = "rustfs-iam"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "async-trait",
@@ -9600,7 +9604,7 @@ dependencies = [

 [[package]]
 name = "rustfs-io-core"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "bytes",
 "hotpath",
@@ -9613,7 +9617,7 @@ dependencies = [

 [[package]]
 name = "rustfs-io-metrics"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "criterion",
 "hotpath",
@@ -9677,7 +9681,7 @@ dependencies = [

 [[package]]
 name = "rustfs-keystone"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "bytes",
 "futures",
@@ -9704,7 +9708,7 @@ dependencies = [

 [[package]]
 name = "rustfs-kms"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "aes-gcm",
 "anyhow",
@@ -9753,7 +9757,7 @@ dependencies = [

 [[package]]
 name = "rustfs-lifecycle"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "hotpath",
@@ -9776,7 +9780,7 @@ dependencies = [

 [[package]]
 name = "rustfs-lock"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "compact_str",
@@ -9799,7 +9803,7 @@ dependencies = [

 [[package]]
 name = "rustfs-log-analyzer"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "chrono",
 "flate2",
@@ -9818,7 +9822,7 @@ dependencies = [

 [[package]]
 name = "rustfs-madmin"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "humantime",
@@ -9833,7 +9837,7 @@ dependencies = [

 [[package]]
 name = "rustfs-notify"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "async-trait",
@@ -9868,7 +9872,7 @@ dependencies = [

 [[package]]
 name = "rustfs-object-capacity"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "criterion",
 "futures",
@@ -9888,7 +9892,7 @@ dependencies = [

 [[package]]
 name = "rustfs-object-data-cache"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "bytes",
 "criterion",
@@ -9905,7 +9909,7 @@ dependencies = [

 [[package]]
 name = "rustfs-obs"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "chrono",
 "crossbeam-channel",
@@ -9960,7 +9964,7 @@ dependencies = [

 [[package]]
 name = "rustfs-policy"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "base64-simd",
@@ -9991,7 +9995,7 @@ dependencies = [

 [[package]]
 name = "rustfs-protocols"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "astral-tokio-tar",
 "async-compression",
@@ -10053,7 +10057,7 @@ dependencies = [

 [[package]]
 name = "rustfs-protos"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "flatbuffers",
 "hotpath",
@@ -10077,7 +10081,7 @@ dependencies = [

 [[package]]
 name = "rustfs-replication"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "byteorder",
 "bytes",
@@ -10095,7 +10099,7 @@ dependencies = [

 [[package]]
 name = "rustfs-rio"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "aes-gcm",
 "arc-swap",
@@ -10133,7 +10137,7 @@ dependencies = [

 [[package]]
 name = "rustfs-rio-v2"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "aes-gcm",
 "bytes",
@@ -10156,7 +10160,7 @@ dependencies = [

 [[package]]
 name = "rustfs-s3-ops"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "rustfs-s3-types",
@@ -10164,7 +10168,7 @@ dependencies = [

 [[package]]
 name = "rustfs-s3-types"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "serde",
@@ -10173,7 +10177,7 @@ dependencies = [

 [[package]]
 name = "rustfs-s3select-api"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "bytes",
@@ -10203,7 +10207,7 @@ dependencies = [

 [[package]]
 name = "rustfs-s3select-query"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-recursion",
 "async-trait",
@@ -10222,7 +10226,7 @@ dependencies = [

 [[package]]
 name = "rustfs-scanner"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "bytes",
@@ -10262,7 +10266,7 @@ dependencies = [

 [[package]]
 name = "rustfs-security-governance"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "thiserror 2.0.20",
@@ -10270,7 +10274,7 @@ dependencies = [

 [[package]]
 name = "rustfs-signer"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "base64-simd",
 "bytes",
@@ -10288,7 +10292,7 @@ dependencies = [

 [[package]]
 name = "rustfs-storage-api"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "hotpath",
@@ -10303,7 +10307,7 @@ dependencies = [

 [[package]]
 name = "rustfs-targets"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "async-nats",
@@ -10357,7 +10361,7 @@ dependencies = [

 [[package]]
 name = "rustfs-test-utils"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "hotpath",
 "rustfs-data-usage",
@@ -10373,7 +10377,7 @@ dependencies = [

 [[package]]
 name = "rustfs-tls-runtime"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "arc-swap",
 "hotpath",
@@ -10394,7 +10398,7 @@ dependencies = [

 [[package]]
 name = "rustfs-trusted-proxies"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "async-trait",
 "axum",
@@ -10431,7 +10435,7 @@ dependencies = [

 [[package]]
 name = "rustfs-utils"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "base64-simd",
 "blake2",
@@ -10473,7 +10477,7 @@ dependencies = [

 [[package]]
 name = "rustfs-zip"
-version = "1.0.0-rc.1"
+version = "1.0.0-rc.2"
 dependencies = [
 "astral-tokio-tar",
 "async-compression",
@@ -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-rc.1"
+version = "1.0.0-rc.2"
 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-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" }
+rustfs = { path = "./rustfs", version = "1.0.0-rc.2" }
+rustfs-heal = { path = "crates/heal", version = "1.0.0-rc.2" }
+rustfs-audit = { path = "crates/audit", version = "1.0.0-rc.2" }
+rustfs-checksums = { path = "crates/checksums", version = "1.0.0-rc.2" }
+rustfs-common = { path = "crates/common", version = "1.0.0-rc.2" }
+rustfs-data-usage = { path = "crates/data-usage", version = "1.0.0-rc.2" }
+rustfs-config = { path = "./crates/config", version = "1.0.0-rc.2" }
+rustfs-concurrency = { path = "./crates/concurrency", version = "1.0.0-rc.2" }
+rustfs-credentials = { path = "crates/credentials", version = "1.0.0-rc.2" }
+rustfs-crypto = { path = "crates/crypto", version = "1.0.0-rc.2" }
+rustfs-ecstore = { path = "crates/ecstore", version = "1.0.0-rc.2" }
+rustfs-filemeta = { path = "crates/filemeta", version = "1.0.0-rc.2" }
+rustfs-iam = { path = "crates/iam", version = "1.0.0-rc.2" }
+rustfs-keystone = { path = "crates/keystone", version = "1.0.0-rc.2" }
+rustfs-lifecycle = { path = "crates/lifecycle", version = "1.0.0-rc.2" }
+rustfs-kms = { path = "crates/kms", version = "1.0.0-rc.2" }
+rustfs-lock = { path = "crates/lock", version = "1.0.0-rc.2" }
+rustfs-madmin = { path = "crates/madmin", version = "1.0.0-rc.2" }
+rustfs-notify = { path = "crates/notify", version = "1.0.0-rc.2" }
+rustfs-io-metrics = { path = "crates/io-metrics", version = "1.0.0-rc.2" }
+rustfs-io-core = { path = "crates/io-core", version = "1.0.0-rc.2" }
+rustfs-object-capacity = { path = "crates/object-capacity", version = "1.0.0-rc.2" }
+rustfs-object-data-cache = { path = "crates/object-data-cache", version = "1.0.0-rc.2", default-features = false }
+rustfs-log-analyzer = { path = "crates/log-analyzer", version = "1.0.0-rc.2" }
+rustfs-obs = { path = "crates/obs", version = "1.0.0-rc.2" }
+rustfs-policy = { path = "crates/policy", version = "1.0.0-rc.2" }
+rustfs-protos = { path = "crates/protos", version = "1.0.0-rc.2" }
+rustfs-protocols = { path = "crates/protocols", version = "1.0.0-rc.2" }
+rustfs-replication = { path = "crates/replication", version = "1.0.0-rc.2" }
+rustfs-rio = { path = "crates/rio", version = "1.0.0-rc.2" }
+rustfs-rio-v2 = { path = "crates/rio-v2", version = "1.0.0-rc.2" }
+rustfs-s3-types = { path = "crates/s3-types", version = "1.0.0-rc.2" }
+rustfs-s3-ops = { path = "crates/s3-ops", version = "1.0.0-rc.2" }
+rustfs-s3select-api = { path = "crates/s3select-api", version = "1.0.0-rc.2" }
+rustfs-s3select-query = { path = "crates/s3select-query", version = "1.0.0-rc.2" }
+rustfs-scanner = { path = "crates/scanner", version = "1.0.0-rc.2" }
+rustfs-security-governance = { path = "crates/security-governance", version = "1.0.0-rc.2" }
+rustfs-extension-schema = { path = "crates/extension-schema", version = "1.0.0-rc.2" }
+rustfs-signer = { path = "crates/signer", version = "1.0.0-rc.2" }
+rustfs-storage-api = { path = "crates/storage-api", version = "1.0.0-rc.2" }
+rustfs-trusted-proxies = { path = "crates/trusted-proxies", version = "1.0.0-rc.2" }
+rustfs-targets = { path = "crates/targets", version = "1.0.0-rc.2" }
+rustfs-test-utils = { path = "crates/test-utils", version = "1.0.0-rc.2" }
+rustfs-tls-runtime = { path = "crates/tls-runtime", version = "1.0.0-rc.2" }
+rustfs-utils = { path = "crates/utils", version = "1.0.0-rc.2" }
+rustfs-zip = { path = "./crates/zip", version = "1.0.0-rc.2" }

 # Async Runtime and Networking
 async-channel = "2.5.0"
@@ -171,7 +171,7 @@ tower = { version = "0.5.3" }
 tower-http = { version = "0.7.0" }

 # Serialization and Data Formats
-apache-avro = "0.22.0"
+apache-avro = { version = "0.22.0", features = ["snappy", "zstandard"] }
 bytes = { version = "1.12.1" }
 bytesize = "2.7.0"
 byteorder = "1.5.0"
@@ -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-rc.1
+docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-rc.2
 ```

 If you use [podman](https://github.com/containers/podman) instead of docker, you can install the RustFS with the below command
@@ -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-rc.1
+docker run -d -p 9000:9000 -p 9001:9001 -v $(pwd)/data:/data -v $(pwd)/logs:/logs rustfs/rustfs:1.0.0-rc.2
 ```

 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：
@@ -67,7 +67,10 @@ fn configured_capture_log_path(temp_dir: &str) -> Option<String> {
    capture_log_path(Path::new(&log_dir), temp_dir).map(|path| path.to_string_lossy().into_owned())
 }

-fn capture_command_logs(command: &mut Command, log_path: Option<&str>) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+pub(crate) fn capture_command_logs(
+    command: &mut Command,
+    log_path: Option<&str>,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let Some(log_path) = log_path else {
        return Ok(());
    };
@@ -2,6 +2,7 @@

 use crate::common::{RustFSTestEnvironment, init_logging, rustfs_binary_path};
 use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::types::{CompletedMultipartUpload, CompletedPart};
 use serial_test::serial;
 use std::fs;
 use std::path::PathBuf;
@@ -25,6 +26,15 @@ fn generate_compressible_data(size: usize) -> Vec<u8> {
    data
 }

+/// Deterministic 2048-byte-period binary pattern that compresses extremely well: every part
+/// yields many compressed blocks, which is exactly the shape that reproduced the mid-payload
+/// Pending truncation (rustfs/rustfs#5957).
+fn generate_high_ratio_binary_data(size: usize, seed: u8) -> Vec<u8> {
+    (0..size)
+        .map(|i| ((i as u64).wrapping_mul(2_654_435_761).wrapping_add(seed as u64) >> 3) as u8)
+        .collect()
+}
+
 fn find_part_files(temp_dir: &str, bucket: &str, object_key: &str) -> Vec<PathBuf> {
    let bucket_path = PathBuf::from(temp_dir).join(bucket);
    let mut part_files = Vec::new();
@@ -55,9 +65,14 @@ async fn start_rustfs_with_compression(env: &mut RustFSTestEnvironment) -> Resul
    env.cleanup_existing_processes().await?;

    let binary_path = rustfs_binary_path();
-    let process = Command::new(&binary_path)
+    // Route the child's stdout/stderr through the shared RUSTFS_E2E_LOG_DIR
+    // capture (survives the temp-dir cleanup on Drop and is uploaded as a CI
+    // artifact); without the env var the child inherits stdio as before.
+    let mut command = Command::new(&binary_path);
+    command
        .env("RUSTFS_CONSOLE_ENABLE", "false")
        .env("RUSTFS_COMPRESSION_ENABLED", "true")
+        .env("RUSTFS_COMPRESSION_MULTIPART_ENABLED", "true")
        .args([
            "--address",
            &env.address,
@@ -66,8 +81,9 @@ async fn start_rustfs_with_compression(env: &mut RustFSTestEnvironment) -> Resul
            "--secret-key",
            &env.secret_key,
            &env.temp_dir,
-        ])
-        .spawn()?;
+        ]);
+    crate::common::capture_command_logs(&mut command, env.capture_log_path.as_deref())?;
+    let process = command.spawn()?;

    env.process = Some(process);

@@ -154,3 +170,647 @@ async fn test_compression_roundtrip() -> Result<(), Box<dyn std::error::Error +
    env.stop_server();
    Ok(())
 }
+
+const MULTIPART_COMPRESSION_BUCKET: &str = "compression-multipart-bucket";
+const MPU_PART1_SIZE: usize = 5 * 1024 * 1024;
+const MPU_PART2_SIZE: usize = 1024 * 1024;
+
+async fn multipart_upload(
+    client: &aws_sdk_s3::Client,
+    bucket: &str,
+    key: &str,
+    parts: &[&[u8]],
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    let create = client.create_multipart_upload().bucket(bucket).key(key).send().await?;
+    let upload_id = create.upload_id().ok_or("missing upload id")?.to_string();
+
+    let mut completed_parts = Vec::with_capacity(parts.len());
+    for (i, part) in parts.iter().enumerate() {
+        let part_number = (i + 1) as i32;
+        let upload = client
+            .upload_part()
+            .bucket(bucket)
+            .key(key)
+            .upload_id(&upload_id)
+            .part_number(part_number)
+            .body(ByteStream::from(part.to_vec()))
+            .send()
+            .await?;
+        completed_parts.push(
+            CompletedPart::builder()
+                .part_number(part_number)
+                .e_tag(upload.e_tag().unwrap_or_default())
+                .build(),
+        );
+    }
+
+    client
+        .complete_multipart_upload()
+        .bucket(bucket)
+        .key(key)
+        .upload_id(&upload_id)
+        .multipart_upload(CompletedMultipartUpload::builder().set_parts(Some(completed_parts)).build())
+        .send()
+        .await?;
+    Ok(())
+}
+
+async fn fetch_range(
+    client: &aws_sdk_s3::Client,
+    bucket: &str,
+    key: &str,
+    range: &str,
+) -> Result<Vec<u8>, Box<dyn std::error::Error + Send + Sync>> {
+    let response = client.get_object().bucket(bucket).key(key).range(range).send().await?;
+    Ok(response.body.collect().await?.into_bytes().to_vec())
+}
+
+/// Multipart disk compression roundtrip: parts are written as independent
+/// compressed streams and every GET shape must reassemble the original bytes
+/// (rustfs/rustfs#5957: multipart uploads previously bypassed disk compression
+/// entirely).
+#[tokio::test]
+#[serial]
+async fn test_compression_multipart_roundtrip() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    info!("Starting multipart compression roundtrip test");
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    start_rustfs_with_compression(&mut env).await?;
+
+    let client = env.create_s3_client();
+    env.create_test_bucket(MULTIPART_COMPRESSION_BUCKET).await?;
+
+    let object_key = "multipart-compressible.txt";
+    let part1 = generate_compressible_data(MPU_PART1_SIZE);
+    let part2 = generate_compressible_data(MPU_PART2_SIZE);
+    let mut original_data = part1.clone();
+    original_data.extend_from_slice(&part2);
+    let total_size = original_data.len();
+
+    multipart_upload(&client, MULTIPART_COMPRESSION_BUCKET, object_key, &[&part1, &part2]).await?;
+
+    let head_response = client
+        .head_object()
+        .bucket(MULTIPART_COMPRESSION_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    assert_eq!(
+        head_response.content_length().unwrap_or(0) as usize,
+        total_size,
+        "Content-Length should be the logical object size"
+    );
+
+    let part_files = find_part_files(&env.temp_dir, MULTIPART_COMPRESSION_BUCKET, object_key);
+    assert!(!part_files.is_empty(), "expected on-disk part files for the multipart object");
+    let total_physical_size: u64 = part_files.iter().filter_map(|p| fs::metadata(p).ok()).map(|m| m.len()).sum();
+    assert!(
+        total_physical_size < (total_size / 2) as u64,
+        "Physical size {total_physical_size} should be well below original size {total_size} (multipart compression applied)"
+    );
+    info!("Multipart physical storage size: {total_physical_size} bytes (compressed from {total_size} bytes)");
+
+    // Full GET must reassemble both independently compressed parts.
+    let get_response = client
+        .get_object()
+        .bucket(MULTIPART_COMPRESSION_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    let downloaded = get_response.body.collect().await?.into_bytes();
+    assert_eq!(downloaded.len(), total_size);
+    assert_eq!(&downloaded[..], &original_data[..], "full GET data mismatch");
+
+    // Range fully inside part 1.
+    let range_inside_part1 = fetch_range(&client, MULTIPART_COMPRESSION_BUCKET, object_key, "bytes=1024-999423").await?;
+    assert_eq!(&range_inside_part1[..], &original_data[1024..999424], "part-1 range mismatch");
+
+    // Range crossing the part boundary.
+    let boundary_start = MPU_PART1_SIZE - 128 * 1024;
+    let boundary_end = MPU_PART1_SIZE + 128 * 1024 - 1;
+    let range_crossing = fetch_range(
+        &client,
+        MULTIPART_COMPRESSION_BUCKET,
+        object_key,
+        &format!("bytes={boundary_start}-{boundary_end}"),
+    )
+    .await?;
+    assert_eq!(
+        &range_crossing[..],
+        &original_data[boundary_start..boundary_end + 1],
+        "boundary-crossing range mismatch"
+    );
+
+    // Range fully inside part 2.
+    let part2_start = MPU_PART1_SIZE + 4096;
+    let part2_end = MPU_PART1_SIZE + 256 * 1024 - 1;
+    let range_inside_part2 = fetch_range(
+        &client,
+        MULTIPART_COMPRESSION_BUCKET,
+        object_key,
+        &format!("bytes={part2_start}-{part2_end}"),
+    )
+    .await?;
+    assert_eq!(
+        &range_inside_part2[..],
+        &original_data[part2_start..part2_end + 1],
+        "part-2 range mismatch"
+    );
+
+    // Suffix range (last 128 KiB, entirely in part 2).
+    let suffix_len = 128 * 1024;
+    let suffix = fetch_range(&client, MULTIPART_COMPRESSION_BUCKET, object_key, &format!("bytes=-{suffix_len}")).await?;
+    assert_eq!(&suffix[..], &original_data[total_size - suffix_len..], "suffix range mismatch");
+
+    // partNumber GETs must return each original part.
+    for (part_number, expected) in [(1, &part1), (2, &part2)] {
+        let response = client
+            .get_object()
+            .bucket(MULTIPART_COMPRESSION_BUCKET)
+            .key(object_key)
+            .part_number(part_number)
+            .send()
+            .await?;
+        let body = response.body.collect().await?.into_bytes();
+        assert_eq!(&body[..], &expected[..], "partNumber={part_number} GET mismatch");
+    }
+
+    info!("Multipart compression roundtrip test passed");
+    env.delete_test_bucket(MULTIPART_COMPRESSION_BUCKET).await?;
+    env.stop_server();
+    Ok(())
+}
+
+const MPU_HIGH_RATIO_BUCKET: &str = "compression-mpu-high-ratio-bucket";
+
+/// High-ratio binary multipart payload: the object key is on the compression allow-list, so the
+/// disk-compression path runs and each part is stored as many compressed blocks — the shape that
+/// reproduced the mid-payload Pending truncation (rustfs/rustfs#5957). Every GET shape must return
+/// the exact original bytes, and the stored size must show the data really was compressed.
+#[tokio::test]
+#[serial]
+async fn test_compression_multipart_high_ratio_binary_roundtrip() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    info!("Starting multipart high-ratio binary compression roundtrip test");
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    start_rustfs_with_compression(&mut env).await?;
+
+    let client = env.create_s3_client();
+    env.create_test_bucket(MPU_HIGH_RATIO_BUCKET).await?;
+
+    let object_key = "multipart-high-ratio.txt";
+    let part1 = generate_high_ratio_binary_data(MPU_PART1_SIZE, 7);
+    let part2 = generate_high_ratio_binary_data(MPU_PART2_SIZE, 61);
+    let mut original_data = part1.clone();
+    original_data.extend_from_slice(&part2);
+    let total_size = original_data.len();
+
+    multipart_upload(&client, MPU_HIGH_RATIO_BUCKET, object_key, &[&part1, &part2]).await?;
+
+    let head_response = client
+        .head_object()
+        .bucket(MPU_HIGH_RATIO_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    assert_eq!(
+        head_response.content_length().unwrap_or(0) as usize,
+        total_size,
+        "Content-Length should be the logical object size"
+    );
+
+    // This pattern compresses to roughly 1/50 of its logical size, so a comfortably loose 2x
+    // margin still proves the parts were stored compressed rather than raw or double-encoded.
+    let part_files = find_part_files(&env.temp_dir, MPU_HIGH_RATIO_BUCKET, object_key);
+    assert!(!part_files.is_empty(), "expected on-disk part files for the multipart object");
+    let total_physical_size: u64 = part_files.iter().filter_map(|p| fs::metadata(p).ok()).map(|m| m.len()).sum();
+    assert!(
+        total_physical_size < (total_size as u64) / 2,
+        "Physical size {total_physical_size} should be far below the logical size {total_size} for high-ratio data"
+    );
+    info!("High-ratio multipart physical storage size: {total_physical_size} bytes (logical {total_size} bytes)");
+
+    info!("step: full GET");
+    let get_response = client
+        .get_object()
+        .bucket(MPU_HIGH_RATIO_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    let downloaded = get_response.body.collect().await?.into_bytes();
+    assert_eq!(downloaded.len(), total_size);
+    assert_eq!(&downloaded[..], &original_data[..], "full GET data mismatch");
+
+    // Range crossing the part boundary.
+    info!("step: boundary range GET");
+    let boundary_start = MPU_PART1_SIZE - 128 * 1024;
+    let boundary_end = MPU_PART1_SIZE + 128 * 1024 - 1;
+    let range_crossing = fetch_range(
+        &client,
+        MPU_HIGH_RATIO_BUCKET,
+        object_key,
+        &format!("bytes={boundary_start}-{boundary_end}"),
+    )
+    .await?;
+    assert_eq!(
+        &range_crossing[..],
+        &original_data[boundary_start..boundary_end + 1],
+        "boundary-crossing range mismatch"
+    );
+
+    // partNumber GET for the trailing part.
+    info!("step: partNumber GET");
+    let part2_response = client
+        .get_object()
+        .bucket(MPU_HIGH_RATIO_BUCKET)
+        .key(object_key)
+        .part_number(2)
+        .send()
+        .await?;
+    let part2_body = part2_response.body.collect().await?.into_bytes();
+    assert_eq!(&part2_body[..], &part2[..], "partNumber=2 GET mismatch");
+
+    info!("Multipart high-ratio binary compression roundtrip test passed");
+    env.delete_test_bucket(MPU_HIGH_RATIO_BUCKET).await?;
+    env.stop_server();
+    Ok(())
+}
+
+const MPU_COPY_COMPRESSION_BUCKET: &str = "compression-mpu-copy-bucket";
+const MPU_COPY_SOURCE_SIZE: usize = 6 * 1024 * 1024;
+const MPU_COPY_RANGE_LEN: usize = 5 * 1024 * 1024;
+
+/// UploadPartCopy feeds a part from an already stored (and already compressed) object. The copied
+/// range must be decompressed on read and re-compressed into the destination part, so the final
+/// object has to match "source prefix + uploaded tail" byte for byte.
+#[tokio::test]
+#[serial]
+async fn test_compression_multipart_upload_part_copy_roundtrip() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    info!("Starting multipart upload-part-copy compression roundtrip test");
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    start_rustfs_with_compression(&mut env).await?;
+
+    let client = env.create_s3_client();
+    env.create_test_bucket(MPU_COPY_COMPRESSION_BUCKET).await?;
+
+    // Source object: a plain PUT that goes through the single-stream compression path.
+    let source_key = "copy-source.txt";
+    let source_data = generate_compressible_data(MPU_COPY_SOURCE_SIZE);
+    client
+        .put_object()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(source_key)
+        .body(ByteStream::from(source_data.clone()))
+        .send()
+        .await?;
+
+    // Destination object: part 1 copied from the source, part 2 uploaded directly.
+    let target_key = "copy-target.txt";
+    let part2 = generate_compressible_data(MPU_PART2_SIZE);
+    let mut expected_data = source_data[..MPU_COPY_RANGE_LEN].to_vec();
+    expected_data.extend_from_slice(&part2);
+    let total_size = expected_data.len();
+
+    let create = client
+        .create_multipart_upload()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .send()
+        .await?;
+    let upload_id = create.upload_id().ok_or("missing upload id")?.to_string();
+
+    let copy_part = client
+        .upload_part_copy()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .upload_id(&upload_id)
+        .part_number(1)
+        .copy_source(format!("{MPU_COPY_COMPRESSION_BUCKET}/{source_key}"))
+        .copy_source_range(format!("bytes=0-{}", MPU_COPY_RANGE_LEN - 1))
+        .send()
+        .await?;
+    let copy_etag = copy_part
+        .copy_part_result()
+        .and_then(|r| r.e_tag())
+        .ok_or("missing copy part etag")?
+        .to_string();
+
+    let uploaded_part = client
+        .upload_part()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .upload_id(&upload_id)
+        .part_number(2)
+        .body(ByteStream::from(part2.clone()))
+        .send()
+        .await?;
+
+    client
+        .complete_multipart_upload()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .upload_id(&upload_id)
+        .multipart_upload(
+            CompletedMultipartUpload::builder()
+                .parts(CompletedPart::builder().part_number(1).e_tag(copy_etag).build())
+                .parts(
+                    CompletedPart::builder()
+                        .part_number(2)
+                        .e_tag(uploaded_part.e_tag().unwrap_or_default())
+                        .build(),
+                )
+                .build(),
+        )
+        .send()
+        .await?;
+
+    let head_response = client
+        .head_object()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .send()
+        .await?;
+    assert_eq!(
+        head_response.content_length().unwrap_or(0) as usize,
+        total_size,
+        "Content-Length should be the logical object size"
+    );
+
+    let part_files = find_part_files(&env.temp_dir, MPU_COPY_COMPRESSION_BUCKET, target_key);
+    assert!(!part_files.is_empty(), "expected on-disk part files for the copied object");
+    let total_physical_size: u64 = part_files.iter().filter_map(|p| fs::metadata(p).ok()).map(|m| m.len()).sum();
+    assert!(
+        total_physical_size < (total_size / 2) as u64,
+        "Physical size {total_physical_size} should be well below original size {total_size} (copied part compression applied)"
+    );
+
+    let get_response = client
+        .get_object()
+        .bucket(MPU_COPY_COMPRESSION_BUCKET)
+        .key(target_key)
+        .send()
+        .await?;
+    let downloaded = get_response.body.collect().await?.into_bytes();
+    assert_eq!(downloaded.len(), total_size);
+    assert_eq!(&downloaded[..], &expected_data[..], "copied multipart GET data mismatch");
+
+    info!("Multipart upload-part-copy compression roundtrip test passed");
+    env.delete_test_bucket(MPU_COPY_COMPRESSION_BUCKET).await?;
+    env.stop_server();
+    Ok(())
+}
+
+const MPU_THREE_PARTS_BUCKET: &str = "compression-mpu-three-parts-bucket";
+const MPU_THREE_PARTS_TAIL_SIZE: usize = 512 * 1024;
+
+/// Three-part upload with uneven part sizes: each partNumber GET must map back to exactly one
+/// compressed part stream, and a suffix range must resolve inside the trailing part.
+#[tokio::test]
+#[serial]
+async fn test_compression_multipart_three_parts_part_number_gets() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    init_logging();
+    info!("Starting three-part multipart compression partNumber test");
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    start_rustfs_with_compression(&mut env).await?;
+
+    let client = env.create_s3_client();
+    env.create_test_bucket(MPU_THREE_PARTS_BUCKET).await?;
+
+    let object_key = "multipart-three-parts.txt";
+    let part1 = generate_compressible_data(MPU_PART1_SIZE);
+    let part2 = generate_compressible_data(MPU_PART1_SIZE);
+    let part3 = generate_compressible_data(MPU_THREE_PARTS_TAIL_SIZE);
+    let mut original_data = part1.clone();
+    original_data.extend_from_slice(&part2);
+    original_data.extend_from_slice(&part3);
+    let total_size = original_data.len();
+
+    multipart_upload(&client, MPU_THREE_PARTS_BUCKET, object_key, &[&part1, &part2, &part3]).await?;
+
+    let head_response = client
+        .head_object()
+        .bucket(MPU_THREE_PARTS_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    assert_eq!(
+        head_response.content_length().unwrap_or(0) as usize,
+        total_size,
+        "Content-Length should be the logical object size"
+    );
+
+    let part_files = find_part_files(&env.temp_dir, MPU_THREE_PARTS_BUCKET, object_key);
+    assert!(!part_files.is_empty(), "expected on-disk part files for the multipart object");
+    let total_physical_size: u64 = part_files.iter().filter_map(|p| fs::metadata(p).ok()).map(|m| m.len()).sum();
+    assert!(
+        total_physical_size < (total_size / 2) as u64,
+        "Physical size {total_physical_size} should be well below original size {total_size} (multipart compression applied)"
+    );
+
+    // Every partNumber GET must return exactly the bytes of the corresponding uploaded part.
+    for (part_number, expected) in [(1, &part1), (2, &part2), (3, &part3)] {
+        let response = client
+            .get_object()
+            .bucket(MPU_THREE_PARTS_BUCKET)
+            .key(object_key)
+            .part_number(part_number)
+            .send()
+            .await?;
+        let body = response.body.collect().await?.into_bytes();
+        assert_eq!(&body[..], &expected[..], "partNumber={part_number} GET mismatch");
+    }
+
+    // Suffix range (last 64 KiB) resolves inside the trailing part.
+    let suffix_len = 64 * 1024;
+    let suffix = fetch_range(&client, MPU_THREE_PARTS_BUCKET, object_key, &format!("bytes=-{suffix_len}")).await?;
+    assert_eq!(&suffix[..], &original_data[total_size - suffix_len..], "suffix range mismatch");
+
+    info!("Three-part multipart compression partNumber test passed");
+    env.delete_test_bucket(MPU_THREE_PARTS_BUCKET).await?;
+    env.stop_server();
+    Ok(())
+}
+
+const MPU_SSE_COMPRESSION_BUCKET: &str = "compression-mpu-sse-bucket";
+
+async fn start_rustfs_with_compression_and_sse(
+    env: &mut RustFSTestEnvironment,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    use base64::Engine;
+    env.cleanup_existing_processes().await?;
+
+    let binary_path = rustfs_binary_path();
+    let master_key = base64::engine::general_purpose::STANDARD.encode([0x42u8; 32]);
+    // Server output goes to a file inside the per-test temp dir so a failing
+    // run can be diagnosed from the child's logs.
+    let server_log = std::fs::File::create(format!("{}/server.log", env.temp_dir))?;
+    let server_log_err = server_log.try_clone()?;
+    let process = Command::new(&binary_path)
+        .env("RUSTFS_CONSOLE_ENABLE", "false")
+        .env("RUSTFS_COMPRESSION_ENABLED", "true")
+        .env("RUSTFS_COMPRESSION_MULTIPART_ENABLED", "true")
+        .env("RUSTFS_SSE_S3_MASTER_KEY", master_key)
+        .env("RUST_LOG", "rustfs=info,rustfs_ecstore=info")
+        .stdout(std::process::Stdio::from(server_log))
+        .stderr(std::process::Stdio::from(server_log_err))
+        .args([
+            "--address",
+            &env.address,
+            "--access-key",
+            &env.access_key,
+            "--secret-key",
+            &env.secret_key,
+            &env.temp_dir,
+        ])
+        .spawn()?;
+
+    env.process = Some(process);
+
+    info!("Waiting for RustFS server with compression + SSE-S3 enabled on {}", env.address);
+    for i in 0..30 {
+        if TcpStream::connect(&env.address).await.is_ok() {
+            info!("RustFS server is ready after {} attempts", i + 1);
+            return Ok(());
+        }
+        if i == 29 {
+            return Err("RustFS server failed to become ready".into());
+        }
+        sleep(Duration::from_secs(1)).await;
+    }
+    Ok(())
+}
+
+/// SSE-S3 + disk compression multipart: each part is compressed and then encrypted, and every GET
+/// shape must still return the original plaintext bytes. Physical size must shrink because the
+/// compression runs before encryption.
+#[tokio::test]
+#[serial]
+async fn test_compression_multipart_sse_s3_roundtrip() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    use aws_sdk_s3::types::ServerSideEncryption;
+
+    init_logging();
+    info!("Starting SSE-S3 multipart compression roundtrip test");
+
+    let mut env = RustFSTestEnvironment::new().await?;
+    start_rustfs_with_compression_and_sse(&mut env).await?;
+
+    let client = env.create_s3_client();
+    env.create_test_bucket(MPU_SSE_COMPRESSION_BUCKET).await?;
+
+    let object_key = "multipart-sse-compressible.txt";
+    let part1 = generate_compressible_data(MPU_PART1_SIZE);
+    let part2 = generate_compressible_data(MPU_PART2_SIZE);
+    let mut original_data = part1.clone();
+    original_data.extend_from_slice(&part2);
+    let total_size = original_data.len();
+
+    let create = client
+        .create_multipart_upload()
+        .bucket(MPU_SSE_COMPRESSION_BUCKET)
+        .key(object_key)
+        .server_side_encryption(ServerSideEncryption::Aes256)
+        .send()
+        .await?;
+    let upload_id = create.upload_id().ok_or("missing upload id")?.to_string();
+
+    let mut completed_parts = Vec::new();
+    for (i, part) in [&part1, &part2].into_iter().enumerate() {
+        let part_number = (i + 1) as i32;
+        let upload = client
+            .upload_part()
+            .bucket(MPU_SSE_COMPRESSION_BUCKET)
+            .key(object_key)
+            .upload_id(&upload_id)
+            .part_number(part_number)
+            .body(ByteStream::from(part.clone()))
+            .send()
+            .await?;
+        completed_parts.push(
+            CompletedPart::builder()
+                .part_number(part_number)
+                .e_tag(upload.e_tag().unwrap_or_default())
+                .build(),
+        );
+    }
+
+    client
+        .complete_multipart_upload()
+        .bucket(MPU_SSE_COMPRESSION_BUCKET)
+        .key(object_key)
+        .upload_id(&upload_id)
+        .multipart_upload(CompletedMultipartUpload::builder().set_parts(Some(completed_parts)).build())
+        .send()
+        .await?;
+
+    let head_response = client
+        .head_object()
+        .bucket(MPU_SSE_COMPRESSION_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    assert_eq!(
+        head_response.content_length().unwrap_or(0) as usize,
+        total_size,
+        "Content-Length should be the logical object size"
+    );
+    assert_eq!(
+        head_response.server_side_encryption(),
+        Some(&ServerSideEncryption::Aes256),
+        "HEAD must report SSE-S3"
+    );
+
+    let part_files = find_part_files(&env.temp_dir, MPU_SSE_COMPRESSION_BUCKET, object_key);
+    assert!(!part_files.is_empty(), "expected on-disk part files for the multipart object");
+    let total_physical_size: u64 = part_files.iter().filter_map(|p| fs::metadata(p).ok()).map(|m| m.len()).sum();
+    assert!(
+        total_physical_size < (total_size / 2) as u64,
+        "Physical size {total_physical_size} should be well below original size {total_size} (compress-then-encrypt applied)"
+    );
+
+    let get_response = client
+        .get_object()
+        .bucket(MPU_SSE_COMPRESSION_BUCKET)
+        .key(object_key)
+        .send()
+        .await?;
+    let downloaded = get_response.body.collect().await?.into_bytes();
+    assert_eq!(downloaded.len(), total_size);
+    assert_eq!(&downloaded[..], &original_data[..], "SSE-S3 multipart full GET data mismatch");
+
+    // Range crossing the part boundary must decrypt and decompress across parts.
+    let boundary_start = MPU_PART1_SIZE - 64 * 1024;
+    let boundary_end = MPU_PART1_SIZE + 64 * 1024 - 1;
+    let range_crossing = fetch_range(
+        &client,
+        MPU_SSE_COMPRESSION_BUCKET,
+        object_key,
+        &format!("bytes={boundary_start}-{boundary_end}"),
+    )
+    .await?;
+    assert_eq!(
+        &range_crossing[..],
+        &original_data[boundary_start..boundary_end + 1],
+        "SSE-S3 boundary-crossing range mismatch"
+    );
+
+    // partNumber GET for the trailing part.
+    let part2_response = client
+        .get_object()
+        .bucket(MPU_SSE_COMPRESSION_BUCKET)
+        .key(object_key)
+        .part_number(2)
+        .send()
+        .await?;
+    let part2_body = part2_response.body.collect().await?.into_bytes();
+    assert_eq!(&part2_body[..], &part2[..], "SSE-S3 partNumber=2 GET mismatch");
+
+    info!("SSE-S3 multipart compression roundtrip test passed");
+    env.delete_test_bucket(MPU_SSE_COMPRESSION_BUCKET).await?;
+    env.stop_server();
+    Ok(())
+}
@@ -76,6 +76,18 @@ const SOURCE_MTIME_HEADERS: [&str; 2] = ["x-rustfs-source-mtime", "x-minio-sourc
 const SOURCE_REPLICATION_REQUEST_HEADERS: [&str; 2] =
    ["x-rustfs-source-replication-request", "x-minio-source-replication-request"];
 const SOURCE_ETAG_HEADERS: [&str; 2] = ["x-rustfs-source-etag", "x-minio-source-etag"];
+const SOURCE_TAGGING_TIMESTAMP_HEADERS: [&str; 2] = [
+    "x-rustfs-source-replication-tagging-timestamp",
+    "x-minio-source-replication-tagging-timestamp",
+];
+const SOURCE_RETENTION_TIMESTAMP_HEADERS: [&str; 2] = [
+    "x-rustfs-source-replication-retention-timestamp",
+    "x-minio-source-replication-retention-timestamp",
+];
+const SOURCE_LEGALHOLD_TIMESTAMP_HEADERS: [&str; 2] = [
+    "x-rustfs-source-replication-legalhold-timestamp",
+    "x-minio-source-replication-legalhold-timestamp",
+];
 const RESERVED_BUCKET_PREFIXES: [&str; 3] = ["xn--", "sthree-", "amzn-s3-demo-"];
 const RESERVED_BUCKET_SUFFIXES: [&str; 6] = ["-s3alias", "--ol-s3", ".mrap", "--x-s3", "--table-s3", "-an"];

@@ -118,6 +130,25 @@ pub enum FaultAction {
    WrongEtag,
 }

+/// Replication LWW timestamp headers observed on a request, journaled so
+/// sender-side tests can assert what a real target would receive.
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct ReplicationTimestampHeaders {
+    pub tagging: Option<String>,
+    pub retention: Option<String>,
+    pub legalhold: Option<String>,
+}
+
+impl ReplicationTimestampHeaders {
+    fn from_headers(headers: &HeaderMap) -> Self {
+        Self {
+            tagging: header_value(headers, &SOURCE_TAGGING_TIMESTAMP_HEADERS).map(bounded_journal_value),
+            retention: header_value(headers, &SOURCE_RETENTION_TIMESTAMP_HEADERS).map(bounded_journal_value),
+            legalhold: header_value(headers, &SOURCE_LEGALHOLD_TIMESTAMP_HEADERS).map(bounded_journal_value),
+        }
+    }
+}
+
 /// Credential-free request metadata retained for deterministic assertions.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct RequestRecord {
@@ -131,6 +162,7 @@ pub struct RequestRecord {
    pub part_number: Option<i32>,
    pub content_length: Option<u64>,
    pub consumed_bytes: Option<usize>,
+    pub replication_timestamps: ReplicationTimestampHeaders,
    pub fault: Option<FaultAction>,
 }

@@ -536,7 +568,15 @@ impl S3Access for FaultAccess {
            .get(CONTENT_LENGTH)
            .and_then(|value| value.to_str().ok())
            .and_then(|value| value.parse().ok());
-        let fault = record_request(&self.control, operation, context.method().clone(), parsed, content_length);
+        let replication_timestamps = ReplicationTimestampHeaders::from_headers(context.headers());
+        let fault = record_request(
+            &self.control,
+            operation,
+            context.method().clone(),
+            parsed,
+            content_length,
+            replication_timestamps,
+        );
        if let Some(RequestFault {
            action: FaultAction::Status(status),
            ..
@@ -589,6 +629,7 @@ fn record_request(
    method: Method,
    parsed: ParsedRequest,
    content_length: Option<u64>,
+    replication_timestamps: ReplicationTimestampHeaders,
 ) -> Option<RequestFault> {
    let mut state = lock(control);
    let action = parsed
@@ -613,6 +654,7 @@ fn record_request(
        part_number: parsed.part_number,
        content_length,
        consumed_bytes: None,
+        replication_timestamps,
        fault: action.clone(),
    });
    action.map(|action| RequestFault { sequence, action })
@@ -1699,6 +1741,52 @@ mod tests {
            .await?)
    }

+    #[tokio::test]
+    async fn journals_replication_timestamp_headers() -> Result<(), BoxError> {
+        let target = FakeS3Target::start().await?;
+        target.create_bucket("target-bucket");
+        let client = client(&target);
+
+        client
+            .put_object()
+            .bucket("target-bucket")
+            .key("plain")
+            .body(ByteStream::from_static(b"plain"))
+            .send()
+            .await?;
+        client
+            .put_object()
+            .bucket("target-bucket")
+            .key("stamped")
+            .body(ByteStream::from_static(b"stamped"))
+            .customize()
+            .map_request(move |mut request| {
+                let headers = request.headers_mut();
+                headers.insert("x-rustfs-source-replication-tagging-timestamp", "2026-01-02T03:04:05Z");
+                headers.insert("x-minio-source-replication-retention-timestamp", "2026-01-02T03:04:06Z");
+                headers.insert("x-rustfs-source-replication-legalhold-timestamp", "2026-01-02T03:04:07Z");
+                Ok::<_, std::convert::Infallible>(request)
+            })
+            .send()
+            .await?;
+
+        let requests = target.requests();
+        let plain = requests
+            .iter()
+            .find(|record| record.operation == Operation::PutObject && record.key.as_deref() == Some("plain"))
+            .expect("plain PUT must be journaled");
+        assert_eq!(plain.replication_timestamps, ReplicationTimestampHeaders::default());
+
+        let stamped = requests
+            .iter()
+            .find(|record| record.operation == Operation::PutObject && record.key.as_deref() == Some("stamped"))
+            .expect("stamped PUT must be journaled");
+        assert_eq!(stamped.replication_timestamps.tagging.as_deref(), Some("2026-01-02T03:04:05Z"));
+        assert_eq!(stamped.replication_timestamps.retention.as_deref(), Some("2026-01-02T03:04:06Z"));
+        assert_eq!(stamped.replication_timestamps.legalhold.as_deref(), Some("2026-01-02T03:04:07Z"));
+        Ok(())
+    }
+
    macro_rules! assert_sdk_error {
        ($error:expr, $status:expr, $code:expr) => {{
            let error = &$error;
@@ -2985,6 +3073,7 @@ mod tests {
                        part_number: None,
                    },
                    Some(0),
+                    ReplicationTimestampHeaders::default(),
                );
            }
            let records = lock(&control).requests.clone();
@@ -3006,6 +3095,7 @@ mod tests {
                    part_number: None,
                },
                None,
+                ReplicationTimestampHeaders::default(),
            );
            {
                let bounded_records = lock(&bounded_control);
@@ -1828,33 +1828,36 @@ async fn four_node_compressed_inline_fallback() -> TestResult {
    Ok(())
 }

+/// Multipart disk compression is live again, so a compression-enabled cluster classifies multipart objects as compressed and the roundtrip (full GET plus partNumber GET) must still return the original bytes.
+/// Reverting the multipart compression fix must fail this test.
 #[tokio::test]
 #[serial]
-async fn four_node_multipart_ignores_disk_compression_fallback() -> TestResult {
+async fn four_node_multipart_disk_compression_roundtrip() -> TestResult {
    init_logging();

    let collector = OtlpMetricCollector::start().await?;
    let mut cluster = RustFSTestClusterEnvironment::new(4).await?;
    configure_reader_metric_cluster(&mut cluster, &collector);
    cluster.set_env("RUSTFS_COMPRESSION_ENABLED", "true");
+    cluster.set_env("RUSTFS_COMPRESSION_MULTIPART_ENABLED", "true");
    cluster.start().await?;

-    let bucket = "inline-multipart-compression-fallback";
+    let bucket = "inline-multipart-compression-roundtrip";
    cluster.create_test_bucket(bucket).await?;
    let client = cluster.create_s3_client(0)?;
-    let key = "multipart/compression-disabled.txt";
+    let key = "multipart/compressed.txt";
    let (body, second_part, etag) = put_two_part_multipart(&client, bucket, key).await?;

    assert_reader_path(
        &collector,
        &client,
-        ReaderPathExpectation::for_class(ReaderObject::new(bucket, key, &body, etag.as_deref(), None), LEGACY_DUPLEX, MULTIPART),
+        ReaderPathExpectation::for_class(ReaderObject::new(bucket, key, &body, etag.as_deref(), None), LEGACY_DUPLEX, COMPRESSED),
    )
    .await?;
    assert_part_number_reader_path(
        &collector,
        &client,
-        PartNumberReaderPathExpectation::new(bucket, key, &second_part, body.len(), MULTIPART, LEGACY_DUPLEX),
+        PartNumberReaderPathExpectation::new(bucket, key, &second_part, body.len(), COMPRESSED, LEGACY_DUPLEX),
    )
    .await?;

@@ -1871,6 +1874,7 @@ async fn four_node_mixed_msgpack_compat_mode_preserves_fallback_controls() -> Te
    let sse_master_key = base64::engine::general_purpose::STANDARD.encode([0x42u8; 32]);
    cluster.set_env("RUSTFS_SSE_S3_MASTER_KEY", sse_master_key);
    cluster.set_env("RUSTFS_COMPRESSION_ENABLED", "true");
+    cluster.set_env("RUSTFS_COMPRESSION_MULTIPART_ENABLED", "true");
    configure_mixed_msgpack_cluster(&mut cluster, &collector)?;
    cluster.start().await?;

@@ -1890,14 +1894,21 @@ async fn four_node_mixed_msgpack_compat_mode_preserves_fallback_controls() -> Te
        ReaderPathExpectation::for_class(
            ReaderObject::new(bucket, multipart_key, &multipart_body, multipart_etag.as_deref(), None),
            LEGACY_DUPLEX,
-            MULTIPART,
+            COMPRESSED,
        ),
    )
    .await?;
    assert_part_number_reader_path(
        &collector,
        &client,
-        PartNumberReaderPathExpectation::new(bucket, multipart_key, &second_part, multipart_body.len(), MULTIPART, LEGACY_DUPLEX),
+        PartNumberReaderPathExpectation::new(
+            bucket,
+            multipart_key,
+            &second_part,
+            multipart_body.len(),
+            COMPRESSED,
+            LEGACY_DUPLEX,
+        ),
    )
    .await?;
    assert_msgpack_decode_observed(&collector, &decode_before).await?;
@@ -2353,7 +2364,11 @@ async fn four_node_mixed_msgpack_compat_mode_preserves_fallback_controls_during_
    hot_client.create_bucket().bucket(bucket).send().await?;
    put_lifecycle_with_transition_retry(&hot_client, bucket, &tier_name).await?;

-    let key = "transition/mixed-multipart.bin";
+    // `.zip` sits on the disk-compression exclusion list: this test pins
+    // msgpack compat controls across ILM transition, and a compressed object
+    // would classify as `compressed` instead of `remote` (and the warm-tier
+    // read path does not decode compression — tracked separately).
+    let key = "transition/mixed-multipart.zip";
    let (body, second_part, etag) = put_two_part_multipart(&hot_client, bucket, key).await?;
    wait_for_transition(&hot_client, bucket, key, &tier_name).await?;
    assert!(
@@ -97,7 +97,7 @@ async fn start_enforcing_ilm_server(env: &mut LocalKMSTestEnvironment) -> TestRe

    let envs = [
        ("RUSTFS_KMS_ALLOW_INSECURE_DEV_DEFAULTS", "true"),
-        ("RUSTFS_KMS_ENFORCE_SSE_KEY_POLICY", "false"),
+        ("RUSTFS_KMS_ENFORCE_SSE_KEY_POLICY", "true"),
        ("RUSTFS_SCANNER_CYCLE", "1"),
        ("RUSTFS_ILM_PROCESS_TIME", "1"),
        ("RUSTFS_ILM_DEBUG_DAY_SECS", "2"),
@@ -486,7 +486,6 @@ async fn ilm_expiration_on_sse_kms_bucket_under_enforcement() -> TestResult {
 /// depend on scanner scheduling; the 1s scanner cycle stays on as a backstop.
 #[tokio::test]
 #[serial]
-#[ignore = "pins rustfs/rustfs#6025: GET on a transitioned managed-SSE object silently returns corrupt bytes (fails with enforcement on AND off, so it is not an authorization regression); un-ignore with the fix"]
 async fn ilm_transition_on_sse_kms_bucket_under_enforcement_reads_back() -> TestResult {
    init_logging();

@@ -135,7 +135,8 @@ pub mod bucket {
        pub use crate::bucket::metadata_sys::ConfigWriteLockProbe;
        pub use crate::bucket::metadata_sys::{
            BucketMetadataMutationGuard, BucketMetadataSys, ObjectLockConfigState, acquire_bucket_metadata_transaction_lock,
-            capture_bucket_metadata_incarnation, delete, delete_if_incarnation, get, get_accelerate_config, get_bucket_policy,
+            acquire_bucket_metadata_transaction_lock_for_incarnation, capture_bucket_metadata_incarnation, delete,
+            delete_if_incarnation, delete_under_transaction_lock, get, get_accelerate_config, get_bucket_policy,
            get_bucket_policy_raw, get_bucket_targets_config, get_config_from_disk, get_cors_config, get_durability_config,
            get_global_bucket_metadata_sys, get_lifecycle_config, get_logging_config, get_notification_config,
            get_object_lock_config, get_object_lock_config_state, get_public_access_block_config, get_quota_config,
@@ -184,17 +185,18 @@ pub mod bucket {
            mrf_backlog_observability_snapshot,
        };
        pub use crate::bucket::replication::{
-            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, commit_force_delete_intent, complete_force_delete_intent,
+            BucketReplicationResyncStatus, BucketReplicationStat, BucketReplicationStats, BucketStats,
+            DeleteReplicationConfigSnapshot, DeletedObjectReplicationInfo, DurableMrfBacklog, DynReplicationPool, InQueueMetric,
+            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, XferStats, 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,
@@ -278,7 +280,9 @@ pub mod cluster {
 }

 pub mod compression {
-    pub use crate::io_support::compress::{MIN_DISK_COMPRESSIBLE_SIZE, is_disk_compressible, is_disk_compression_enabled};
+    pub use crate::io_support::compress::{
+        MIN_DISK_COMPRESSIBLE_SIZE, is_disk_compressible, is_disk_compression_enabled, is_multipart_disk_compression_enabled,
+    };
 }

 pub mod config {
@@ -58,7 +58,9 @@ use rustfs_utils::http::{
 };
 use rustfs_utils::http::{
    SUFFIX_FORCE_DELETE, SUFFIX_SOURCE_DELETEMARKER, SUFFIX_SOURCE_ETAG, SUFFIX_SOURCE_MTIME, SUFFIX_SOURCE_REPLICATION_CHECK,
-    SUFFIX_SOURCE_REPLICATION_REQUEST, SUFFIX_SOURCE_VERSION_ID, insert_header,
+    SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP, SUFFIX_SOURCE_REPLICATION_REQUEST,
+    SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP, SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP, SUFFIX_SOURCE_VERSION_ID,
+    insert_header,
 };
 use rustls_pki_types::pem::PemObject;
 use serde::{Deserialize, Serialize};
@@ -1476,9 +1478,12 @@ impl Default for AdvancedPutOptions {
            replication_status: ReplicationStatusType::Pending,
            source_mtime: OffsetDateTime::now_utc(),
            replication_request: false,
-            retention_timestamp: OffsetDateTime::now_utc(),
-            tagging_timestamp: OffsetDateTime::now_utc(),
-            legalhold_timestamp: OffsetDateTime::now_utc(),
+            // UNIX_EPOCH means "never modified": header() must not emit a
+            // timestamp header for it, otherwise a receiver would treat an
+            // unset category as a modification made right now.
+            retention_timestamp: OffsetDateTime::UNIX_EPOCH,
+            tagging_timestamp: OffsetDateTime::UNIX_EPOCH,
+            legalhold_timestamp: OffsetDateTime::UNIX_EPOCH,
            replication_validity_check: false,
        }
    }
@@ -1675,6 +1680,16 @@ impl PutObjectOptions {
            );
        }

+        for (suffix, timestamp) in [
+            (SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP, self.internal.tagging_timestamp),
+            (SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP, self.internal.retention_timestamp),
+            (SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP, self.internal.legalhold_timestamp),
+        ] {
+            if timestamp.unix_timestamp() != 0 {
+                insert_header(&mut header, suffix, timestamp.format(&Rfc3339).unwrap_or_default());
+            }
+        }
+
        if self.internal.replication_request {
            insert_header(&mut header, SUFFIX_SOURCE_REPLICATION_REQUEST, "true");
        }
@@ -2842,6 +2857,57 @@ mod tests {
        );
    }

+    #[test]
+    fn put_object_headers_carry_replication_timestamp_headers() {
+        // MinIO receivers resolve concurrent tag/retention/legal-hold edits by
+        // last-writer-wins on these headers (object-api-options.go parses them
+        // as RFC3339); a replica without them loses every conflict resolution.
+        let mut opts = PutObjectOptions::default();
+        opts.internal.replication_request = true;
+        let tagging = OffsetDateTime::from_unix_timestamp(1_700_000_001).expect("valid timestamp");
+        let retention = OffsetDateTime::from_unix_timestamp(1_700_000_002).expect("valid timestamp");
+        let legalhold = OffsetDateTime::from_unix_timestamp(1_700_000_003).expect("valid timestamp");
+        opts.internal.tagging_timestamp = tagging;
+        opts.internal.retention_timestamp = retention;
+        opts.internal.legalhold_timestamp = legalhold;
+
+        let header = opts.header();
+        for (suffix, expected) in [
+            ("source-replication-tagging-timestamp", tagging),
+            ("source-replication-retention-timestamp", retention),
+            ("source-replication-legalhold-timestamp", legalhold),
+        ] {
+            assert_eq!(
+                rustfs_utils::http::get_header(&header, suffix).as_deref(),
+                Some(expected.format(&Rfc3339).expect("RFC3339 timestamp").as_str()),
+                "replication put requests must carry the {suffix} header"
+            );
+        }
+    }
+
+    #[test]
+    fn put_object_headers_omit_unset_replication_timestamps() {
+        // UNIX_EPOCH means "never modified on the source"; sending it would
+        // make the receiver treat an unset category as a fresh modification.
+        let mut opts = PutObjectOptions::default();
+        opts.internal.replication_request = true;
+        opts.internal.tagging_timestamp = OffsetDateTime::UNIX_EPOCH;
+        opts.internal.retention_timestamp = OffsetDateTime::UNIX_EPOCH;
+        opts.internal.legalhold_timestamp = OffsetDateTime::UNIX_EPOCH;
+
+        let header = opts.header();
+        for suffix in [
+            "source-replication-tagging-timestamp",
+            "source-replication-retention-timestamp",
+            "source-replication-legalhold-timestamp",
+        ] {
+            assert!(
+                rustfs_utils::http::get_header(&header, suffix).is_none(),
+                "unset {suffix} must not be sent to replication targets"
+            );
+        }
+    }
+
    #[tokio::test]
    async fn get_remote_target_client_internal_rejects_loopback_endpoint() {
        let sys = BucketTargetSys::default();
@@ -46,15 +46,13 @@ use crate::bucket::lifecycle::transition_transaction::run_transition_transaction
 use crate::bucket::object_lock::ObjectLockApi;
 use crate::bucket::versioning::VersioningApi as _;
 use crate::bucket::versioning_sys::BucketVersioningSys;
-use crate::client::object_api_utils::new_getobjectreader;
 use crate::disk::error::DiskError;
 use crate::disk::{DeleteOptions, Disk, DiskAPI, RUSTFS_META_BUCKET, RUSTFS_META_MULTIPART_BUCKET, STORAGE_FORMAT_FILE};
 use crate::error::Error;
 use crate::error::StorageError;
-use crate::error::{
-    error_resp_to_object_err, is_err_object_not_found, is_err_read_quorum, is_err_version_not_found, is_network_or_host_down,
-};
+use crate::error::{is_err_object_not_found, is_err_read_quorum, is_err_version_not_found, is_network_or_host_down};
 use crate::object_api::{GetObjectReader, ObjectInfo, ObjectOptions};
+use crate::object_api::{ObjectEncryptionResolver, ReadPlan};
 use crate::services::tier::{
    tier::{TierConfigMgr, TierOperationLease, tier_destination_id_from_metadata},
    warm_backend::WarmBackendGetOpts,
@@ -4400,9 +4398,10 @@ pub async fn get_transitioned_object_reader(
    h: &HeaderMap,
    oi: &ObjectInfo,
    opts: &ObjectOptions,
+    resolver: Option<&dyn ObjectEncryptionResolver>,
 ) -> Result<GetObjectReader, std::io::Error> {
    let tier_config_mgr = runtime_sources::tier_config_mgr_handle();
-    get_transitioned_object_reader_with_tier_manager(bucket, object, rs, h, oi, opts, &tier_config_mgr).await
+    get_transitioned_object_reader_with_tier_manager(bucket, object, rs, h, oi, opts, &tier_config_mgr, resolver).await
 }

 fn validate_transition_remote_version(oi: &ObjectInfo) -> Result<bool, std::io::Error> {
@@ -4422,6 +4421,10 @@ fn validate_transition_remote_version(oi: &ObjectInfo) -> Result<bool, std::io::
    }
 }

+// The resolver joins the tier manager as the second injected port this read
+// needs; grouping the request half into a struct would churn every call site of
+// a bug fix.
+#[allow(clippy::too_many_arguments)]
 pub(crate) async fn get_transitioned_object_reader_with_tier_manager(
    bucket: &str,
    object: &str,
@@ -4430,6 +4433,7 @@ pub(crate) async fn get_transitioned_object_reader_with_tier_manager(
    oi: &ObjectInfo,
    opts: &ObjectOptions,
    tier_config_mgr: &Arc<RwLock<TierConfigMgr>>,
+    resolver: Option<&dyn ObjectEncryptionResolver>,
 ) -> Result<GetObjectReader, std::io::Error> {
    validate_transition_remote_version(oi)?;
    let expected_identity = tier_destination_id_from_metadata(&oi.user_defined)?;
@@ -4447,11 +4451,16 @@ pub(crate) async fn get_transitioned_object_reader_with_tier_manager(

    tgt_client.validate_remote_version_id(&oi.transitioned_object.version_id)?;

-    let ret = new_getobjectreader(rs, oi, opts, h);
-    if let Err(err) = ret {
-        return Err(error_resp_to_object_err(err, vec![bucket, object]));
-    }
-    let (get_fn, off, length) = ret.expect("get_transitioned_object_reader should succeed after error check");
+    // The same read plan the local path uses, so the tier fetch is positioned in
+    // the object's *stored* coordinate system and the stream is handed the same
+    // decrypt/decompress transforms. Reading an encrypted object's ciphertext
+    // through a plaintext-coordinate range and skipping the transform is how a
+    // transitioned SSE object used to come back as silently corrupt bytes of the
+    // right length (rustfs/rustfs#6025).
+    let plan = ReadPlan::build_for_request(rs.clone(), oi, opts, h, resolver)
+        .await
+        .map_err(|err| std::io::Error::other(format!("building the read plan for {bucket}/{object} failed: {err}")))?;
+    let (off, length) = (plan.storage_offset() as i64, plan.storage_length());
    let mut gopts = WarmBackendGetOpts::default();

    if off >= 0 && length >= 0 {
@@ -4488,7 +4497,10 @@ pub(crate) async fn get_transitioned_object_reader_with_tier_manager(
            );
            e
        })?;
-    Ok(attach_tier_operation_lease(get_fn(reader, h.clone()), tgt_client))
+    let object_reader = plan
+        .into_object_reader(Box::new(reader), oi)
+        .map_err(|err| std::io::Error::other(format!("wrapping the tier stream for {bucket}/{object} failed: {err}")))?;
+    Ok(attach_tier_operation_lease(object_reader, tgt_client))
 }

 struct TierOperationLeaseReader {
@@ -5776,6 +5788,7 @@ mod tests {
            &object_info,
            &ObjectOptions::default(),
            &manager,
+            None,
        )
        .await
        .expect("transitioned reader should open");
@@ -5840,6 +5853,7 @@ mod tests {
            &object_info,
            &ObjectOptions::default(),
            &manager,
+            None,
        )
        .await
        {
@@ -5880,6 +5894,7 @@ mod tests {
            &object_info,
            &ObjectOptions::default(),
            &manager,
+            None,
        )
        .await
        {
@@ -6117,6 +6132,7 @@ mod tests {
            &oi,
            &ObjectOptions::default(),
            &manager,
+            None,
        )
        .await
        {
@@ -6140,6 +6156,7 @@ mod tests {
            &oi,
            &ObjectOptions::default(),
            &manager,
+            None,
        )
        .await
        {
@@ -656,6 +656,16 @@ pub async fn update_under_transaction_lock(
    update_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file, data).await
 }

+/// Clear one config file while the caller holds this bucket's transaction lock.
+pub async fn delete_under_transaction_lock(
+    guard: &BucketMetadataMutationGuard,
+    bucket: &str,
+    config_file: &str,
+) -> Result<OffsetDateTime> {
+    guard.ensure_valid(bucket)?;
+    delete_under_config_write_guard(get_bucket_metadata_sys()?, guard, config_file).await
+}
+
 pub async fn update_quota_if_incarnation(
    bucket: &str,
    data: Vec<u8>,
@@ -795,6 +805,14 @@ pub async fn acquire_bucket_metadata_transaction_lock(bucket: &str) -> Result<Bu
    acquire_config_write_guard(get_bucket_metadata_sys()?, bucket).await
 }

+/// Acquire the bucket transaction lock only if its incarnation still matches.
+pub async fn acquire_bucket_metadata_transaction_lock_for_incarnation(
+    bucket: &str,
+    expected_incarnation_id: Uuid,
+) -> Result<BucketMetadataMutationGuard> {
+    acquire_config_write_guard_for_incarnation(get_bucket_metadata_sys()?, bucket, Some(expected_incarnation_id)).await
+}
+
 pub(crate) async fn acquire_bucket_metadata_transaction_lock_in(
    ctx: &crate::runtime::instance::InstanceContext,
    bucket: &str,
@@ -81,6 +81,6 @@ pub use replication_queue_boundary::{
 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::{BucketReplicationStats, BucketStats};
+pub use replication_stats_boundary::{BucketReplicationStat, BucketReplicationStats, BucketStats, InQueueMetric, XferStats};
 pub use replication_storage_boundary::{ReplicationObjectIO, ReplicationStorage};
 pub(crate) use replication_target_config_bridge::ReplicationTargetConfigBridge;
@@ -704,6 +704,12 @@ impl ReplicationStats {
        } else {
            BucketReplicationStats::new()
        };
+        // Stamp the serializable failure windows from the live samples: the
+        // samples themselves do not cross the peer-RPC wire, so this snapshot
+        // is what cluster aggregation and the metrics endpoints see.
+        for stat in replication_stats.stats.values_mut() {
+            stat.fail_stats.refresh_windows();
+        }
        let uptime = if cache.contains_key(bucket) {
            SystemTime::now()
                .duration_since(SystemTime::UNIX_EPOCH)
@@ -15,7 +15,9 @@
 #[cfg(test)]
 pub(crate) use rustfs_replication::FailStats;
 pub(crate) use rustfs_replication::{
-    ActiveWorkerStat, BucketReplicationStat, InQueueMetric, ProxyMetric, ProxyStatsCache, QueueCache, ReplicationMetricScope,
-    SRMetricsSummary, XferStats,
+    ActiveWorkerStat, ProxyMetric, ProxyStatsCache, QueueCache, ReplicationMetricScope, SRMetricsSummary,
 };
-pub use rustfs_replication::{BucketReplicationStats, BucketStats};
+// Public so the admin wire DTOs (rustfs/src/admin/replication_metrics_wire.rs)
+// can project the internal stats onto the minio-go response shapes through
+// the storage_api facade chain.
+pub use rustfs_replication::{BucketReplicationStat, BucketReplicationStats, BucketStats, InQueueMetric, XferStats};
@@ -27,8 +27,10 @@ use rustfs_utils::http::{
    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, is_object_encryption_marker, is_replication_stripped_encryption_key, ssec_replication_transport_header,
+    SUFFIX_REPLICATION_ACTUAL_OBJECT_SIZE, SUFFIX_REPLICATION_SSEC_CRC, SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP,
+    SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP, SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP, SUFFIX_TAGGING_TIMESTAMP,
+    get_str, insert_header_map, is_internal_key, is_object_encryption_marker, is_replication_stripped_encryption_key,
+    ssec_replication_transport_header,
 };
 use time::OffsetDateTime;
 use time::format_description::well_known::Rfc3339;
@@ -119,6 +121,27 @@ fn classify_replication_source_encryption(metadata: &HashMap<String, String>) ->
    }
 }

+fn is_legacy_source_replication_timestamp_key(key: &str) -> bool {
+    fn has_prefix_and_suffix(key: &str, prefix: &str, suffix: &str) -> bool {
+        let key = key.as_bytes();
+        key.len() == prefix.len() + suffix.len()
+            && key[..prefix.len()].eq_ignore_ascii_case(prefix.as_bytes())
+            && key[prefix.len()..].eq_ignore_ascii_case(suffix.as_bytes())
+    }
+
+    [
+        SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP,
+        SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP,
+        SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP,
+    ]
+    .iter()
+    .any(|suffix| {
+        ["x-rustfs-", "x-minio-"]
+            .iter()
+            .any(|prefix| has_prefix_and_suffix(key, prefix, suffix))
+    })
+}
+
 pub(crate) fn replication_object_is_ssec_encrypted(user_defined: &HashMap<String, String>) -> bool {
    rustfs_replication::is_ssec_encrypted(user_defined)
 }
@@ -176,6 +199,11 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
            continue;
        }

+        if is_legacy_source_replication_timestamp_key(key) {
+            meta.insert(format!("x-amz-meta-{key}"), value.to_string());
+            continue;
+        }
+
        if is_internal_key(key) || is_standard_header(key) {
            continue;
        }
@@ -259,15 +287,23 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)

        if !tags.is_empty() {
            put_options.user_tags = tags;
-            put_options.internal.tagging_timestamp =
-                if let Some(timestamp) = get_str(&object_info.user_defined, SUFFIX_TAGGING_TIMESTAMP) {
-                    OffsetDateTime::parse(&timestamp, &Rfc3339)
-                        .map_err(|err| Error::other(format!("Failed to parse tagging timestamp: {err}")))?
-                } else {
-                    object_info.mod_time.unwrap_or(OffsetDateTime::UNIX_EPOCH)
-                };
        }
    }
+    // Load the stored tagging timestamp independently of whether any tags
+    // remain: DeleteObjectTagging leaves the object tagless but stamps this
+    // key, and the deletion's LWW timestamp must still reach the replica.
+    // With no stored key, fall back to mod_time only while tags exist
+    // (MinIO parity); a tagless object without the key was never tagged and
+    // keeps the epoch default (no header).
+    put_options.internal.tagging_timestamp = if let Some(timestamp) = get_str(&object_info.user_defined, SUFFIX_TAGGING_TIMESTAMP)
+    {
+        OffsetDateTime::parse(&timestamp, &Rfc3339)
+            .map_err(|err| Error::other(format!("Failed to parse tagging timestamp: {err}")))?
+    } else if !put_options.user_tags.is_empty() {
+        object_info.mod_time.unwrap_or(OffsetDateTime::UNIX_EPOCH)
+    } else {
+        OffsetDateTime::UNIX_EPOCH
+    };

    let metadata = &*object_info.user_defined;

@@ -283,13 +319,15 @@ pub(crate) fn replication_put_object_options(sc: &str, object_info: &ObjectInfo)
        put_options.cache_control = cache_control.to_string();
    }

-    if let Some(mode) = metadata.lookup(AMZ_OBJECT_LOCK_MODE) {
+    if let Some(mode) = metadata.lookup(AMZ_OBJECT_LOCK_MODE).filter(|mode| !mode.is_empty()) {
        put_options.mode = Some(ObjectLockRetentionMode::from(mode.to_uppercase().as_str()));
    }

    if let Some(retain_until_date) = metadata.lookup(AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE) {
-        put_options.retain_until_date = OffsetDateTime::parse(retain_until_date, &Rfc3339)
-            .map_err(|err| Error::other(format!("Failed to parse retain until date: {err}")))?;
+        if !retain_until_date.is_empty() {
+            put_options.retain_until_date = OffsetDateTime::parse(retain_until_date, &Rfc3339)
+                .map_err(|err| Error::other(format!("Failed to parse retain until date: {err}")))?;
+        }
        put_options.internal.retention_timestamp =
            if let Some(timestamp) = get_str(&object_info.user_defined, SUFFIX_OBJECTLOCK_RETENTION_TIMESTAMP) {
                OffsetDateTime::parse(&timestamp, &Rfc3339).unwrap_or(OffsetDateTime::UNIX_EPOCH)
@@ -694,6 +732,110 @@ mod tests {
        assert!(options.internal.replication_request);
    }

+    /// DeleteObjectTagging leaves the object tagless but stamps the
+    /// tagging-timestamp internal key; the deletion's LWW timestamp must
+    /// still be loaded (and therefore sent) so the replica can order the
+    /// deletion against concurrent tag edits.
+    #[test]
+    fn replication_put_options_carry_tagging_timestamp_after_tag_deletion() {
+        let mut metadata = std::collections::HashMap::new();
+        rustfs_utils::http::insert_str(&mut metadata, SUFFIX_TAGGING_TIMESTAMP, "2026-01-02T03:04:05Z".to_string());
+
+        let object_info = ObjectInfo {
+            user_defined: Arc::new(metadata),
+            user_tags: Arc::new(String::new()),
+            mod_time: Some(OffsetDateTime::UNIX_EPOCH),
+            version_id: Some(Uuid::nil()),
+            ..Default::default()
+        };
+
+        let (options, _) = replication_put_object_options("", &object_info).expect("build put options");
+
+        assert!(options.user_tags.is_empty());
+        assert_eq!(
+            options.internal.tagging_timestamp,
+            OffsetDateTime::parse("2026-01-02T03:04:05Z", &Rfc3339).expect("valid timestamp"),
+            "the stored tagging timestamp must load independently of remaining tags"
+        );
+
+        // A tagless object without the stored key was never tagged: the epoch
+        // default keeps the header unsent.
+        let untagged = ObjectInfo {
+            user_tags: Arc::new(String::new()),
+            mod_time: Some(OffsetDateTime::from_unix_timestamp(1_700_000_000).expect("timestamp")),
+            version_id: Some(Uuid::nil()),
+            ..Default::default()
+        };
+        let (options, _) = replication_put_object_options("", &untagged).expect("build put options");
+        assert_eq!(options.internal.tagging_timestamp, OffsetDateTime::UNIX_EPOCH);
+    }
+
+    #[test]
+    fn replication_put_options_do_not_promote_legacy_user_timestamp_metadata() {
+        let legacy_keys = [
+            "x-rustfs-source-replication-tagging-timestamp",
+            "x-rustfs-source-replication-retention-timestamp",
+            "x-rustfs-source-replication-legalhold-timestamp",
+            "x-minio-source-replication-tagging-timestamp",
+            "x-minio-source-replication-retention-timestamp",
+            "x-minio-source-replication-legalhold-timestamp",
+        ];
+        let object_info = ObjectInfo {
+            user_defined: Arc::new(
+                legacy_keys
+                    .iter()
+                    .map(|key| (key.to_string(), "2099-01-02T03:04:05Z".to_string()))
+                    .collect(),
+            ),
+            ..Default::default()
+        };
+
+        let (options, _) = replication_put_object_options("", &object_info).expect("build put options");
+
+        for legacy_key in legacy_keys {
+            assert!(!options.user_metadata.contains_key(legacy_key));
+            assert_eq!(
+                options
+                    .user_metadata
+                    .get(&format!("x-amz-meta-{legacy_key}"))
+                    .map(String::as_str),
+                Some("2099-01-02T03:04:05Z")
+            );
+        }
+        assert_eq!(options.internal.tagging_timestamp, OffsetDateTime::UNIX_EPOCH);
+        assert_eq!(options.internal.retention_timestamp, OffsetDateTime::UNIX_EPOCH);
+        assert_eq!(options.internal.legalhold_timestamp, OffsetDateTime::UNIX_EPOCH);
+    }
+
+    #[test]
+    fn replication_put_options_carry_retention_timestamp_after_clear() {
+        let mut metadata = HashMap::from([
+            (AMZ_OBJECT_LOCK_MODE.to_string(), String::new()),
+            (AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE.to_string(), String::new()),
+        ]);
+        rustfs_utils::http::insert_str(&mut metadata, SUFFIX_OBJECTLOCK_RETENTION_TIMESTAMP, "2026-01-02T03:04:05Z".to_string());
+        let object_info = ObjectInfo {
+            user_defined: Arc::new(metadata),
+            ..Default::default()
+        };
+
+        let (options, _) = replication_put_object_options("", &object_info).expect("retention clear must replicate");
+
+        assert!(options.mode.is_none());
+        assert_eq!(options.retain_until_date, OffsetDateTime::UNIX_EPOCH);
+        assert_eq!(
+            options.internal.retention_timestamp,
+            OffsetDateTime::parse("2026-01-02T03:04:05Z", &Rfc3339).expect("valid timestamp")
+        );
+        let headers = options.header();
+        assert!(!headers.contains_key(AMZ_OBJECT_LOCK_MODE));
+        assert!(!headers.contains_key(AMZ_OBJECT_LOCK_RETAIN_UNTIL_DATE));
+        assert_eq!(
+            rustfs_utils::http::get_header(&headers, SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP).as_deref(),
+            Some("2026-01-02T03:04:05Z")
+        );
+    }
+
    #[test]
    fn replication_put_options_strip_encryption_metadata_from_plaintext_objects() {
        use rustfs_utils::http::object_encryption_keys::{INTERNAL_ENCRYPTION_ORIGINAL_SIZE_HEADER, SSEC_ORIGINAL_SIZE_HEADER};
@@ -40,7 +40,14 @@ impl ARN {

 impl Display for ARN {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "arn:rustfs:{}:{}:{}:{}", self.arn_type, self.region, self.id, self.bucket)
+        // The `minio` partition is deliberate: madmin-go's ParseARN
+        // hard-rejects any other partition, so native mc/madmin tooling can
+        // only decode remote-target ARNs minted in this form (backlog#1675
+        // P1-7). Legacy `arn:rustfs:` ARNs persisted by older releases stay
+        // readable via the FromStr whitelist below; runtime matching between
+        // targets and replication rules is by full-string equality, so mixed
+        // partitions coexist safely.
+        write!(f, "arn:minio:{}:{}:{}:{}", self.arn_type, self.region, self.id, self.bucket)
    }
 }

@@ -48,7 +55,12 @@ impl FromStr for ARN {
    type Err = std::io::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        if !s.starts_with("arn:rustfs:") {
+        // Partition whitelist, not just an `arn:` check: `BucketTargetType::
+        // from_str(...).unwrap_or_default()` below never fails, so this is
+        // the only structural gate rejecting foreign ARNs. `arn:rustfs:` is
+        // the legacy partition and must stay accepted forever (persisted
+        // bucket-targets.json / replication configs from older releases).
+        if !s.starts_with("arn:minio:") && !s.starts_with("arn:rustfs:") {
            return Err(std::io::Error::new(std::io::ErrorKind::InvalidInput, "Invalid ARN format"));
        }

@@ -101,14 +113,50 @@ mod tests {
    }

    /// RustFS commonly generates ARNs with an empty region:
-    /// `arn:rustfs:replication::<deployment_id>:<bucket>`.
+    /// `arn:minio: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");
+        let parsed = ARN::from_str("arn:minio: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");
    }
+
+    /// madmin-go's `ParseARN` hard-rejects anything that does not start with
+    /// `arn:minio:`, so generated ARNs must use the `minio` partition or the
+    /// native mc/madmin tooling cannot decode remote-target listings.
+    #[test]
+    fn display_emits_minio_partition() {
+        let arn = ARN::new(
+            BucketTargetType::ReplicationService,
+            "depl-123".to_string(),
+            String::new(),
+            "bucket-a".to_string(),
+        );
+
+        assert_eq!(arn.to_string(), "arn:minio:replication::depl-123:bucket-a");
+    }
+
+    /// Persisted bucket-targets.json files from older RustFS releases carry
+    /// `arn:rustfs:` ARNs; the legacy partition must stay parseable forever.
+    #[test]
+    fn from_str_accepts_legacy_rustfs_partition() {
+        let parsed = ARN::from_str("arn:rustfs:replication:us-east-1:depl-123:bucket-a").expect("legacy 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");
+    }
+
+    /// The partition whitelist is the only structural gate: `BucketTargetType::
+    /// from_str(...).unwrap_or_default()` never fails, so any 6-segment string
+    /// would otherwise parse as `type=None`.
+    #[test]
+    fn from_str_rejects_unknown_partition() {
+        assert!(ARN::from_str("arn:aws:replication::depl-123:bucket-a").is_err());
+        assert!(ARN::from_str("not-an-arn").is_err());
+    }
 }
@@ -15,6 +15,7 @@
 use crate::disk::disk_store::{get_drive_walkdir_peek_timeout, get_drive_walkdir_stall_timeout};
 use crate::disk::error::DiskError;
 use crate::disk::{self, DiskAPI, DiskStore, WalkDirOptions};
+use futures::future::join_all;
 use metrics::counter;
 use rustfs_filemeta::{MetaCacheEntries, MetaCacheEntry, MetacacheReader, is_io_eof};
 use std::{
@@ -655,6 +656,7 @@ async fn list_path_raw_inner(
            errs.push(None);
        }
        let mut pending_entries: Vec<Option<MetaCacheEntry>> = vec![None; readers.len()];
+        let mut peek_outcomes: Vec<Option<PeekOutcome>> = std::iter::repeat_with(|| None).take(readers.len()).collect();

        loop {
            let mut current = MetaCacheEntry::default();
@@ -676,6 +678,21 @@ async fn list_path_raw_inner(
            let mut has_err = 0;
            let mut agree = 0;

+            // Start every missing head read in the same round so one stalled
+            // disk cannot multiply the wait budget by the erasure-set width.
+            // Outcomes are still consumed below in stable disk-index order.
+            let concurrent_peeks = readers.iter_mut().enumerate().filter_map(|(i, reader)| {
+                if errs[i].is_some() || pending_entries[i].is_some() {
+                    return None;
+                }
+
+                let cancel = &revjob_rx;
+                Some(async move { (i, peek_with_timeout(cancel, reader, peek_timeout).await) })
+            });
+            for (i, outcome) in join_all(concurrent_peeks).await {
+                peek_outcomes[i] = Some(outcome);
+            }
+
            for (i, r) in readers.iter_mut().enumerate() {
                if errs[i].is_some() {
                    has_err += 1;
@@ -685,7 +702,10 @@ async fn list_path_raw_inner(
                let entry = if let Some(entry) = pending_entries[i].take() {
                    entry
                } else {
-                    match peek_with_timeout(&revjob_rx, r, peek_timeout).await {
+                    let Some(outcome) = peek_outcomes[i].take() else {
+                        return Err(DiskError::Unexpected);
+                    };
+                    match outcome {
                        PeekOutcome::Ready(res) => {
                            if let Some(entry) = res {
                                // info!("read entry disk: {}, name: {}", i, entry.name);
@@ -1295,6 +1315,36 @@ mod tests {
        assert_eq!(err, DiskError::Timeout);
    }

+    #[tokio::test(start_paused = true)]
+    async fn list_path_raw_bounds_multiple_stalled_readers_by_one_peek_deadline() {
+        let peek_timeout = Duration::from_millis(20);
+        let started = tokio::time::Instant::now();
+        let err = list_path_raw(
+            CancellationToken::new(),
+            ListPathRawOptions {
+                disks: vec![None, None, None, None],
+                min_disks: 1,
+                test_reader_behaviors: vec![
+                    TestReaderBehavior::Stall,
+                    TestReaderBehavior::Stall,
+                    TestReaderBehavior::Stall,
+                    TestReaderBehavior::Stall,
+                ],
+                peek_timeout: Some(peek_timeout),
+                ..Default::default()
+            },
+        )
+        .await
+        .expect_err("all stalled readers should fail the listing");
+
+        assert_eq!(err, DiskError::Timeout);
+        assert_eq!(
+            started.elapsed(),
+            peek_timeout,
+            "reader deadlines must overlap instead of accumulating once per disk"
+        );
+    }
+
    #[tokio::test]
    async fn list_path_raw_waits_past_producer_stall_for_slow_progressing_reader() {
        let entry = MetaCacheEntry {
@@ -229,17 +229,6 @@ pub fn http_resp_to_error_response(
    err_resp
 }

-pub fn err_transfer_acceleration_bucket(bucket_name: &str) -> ErrorResponse {
-    ErrorResponse {
-        status_code: StatusCode::BAD_REQUEST,
-        code: S3ErrorCode::InvalidArgument,
-        message: "The name of the bucket used for Transfer Acceleration must be DNS-compliant and must not contain periods ‘.’."
-            .to_string(),
-        bucket_name: bucket_name.to_string(),
-        ..Default::default()
-    }
-}
-
 pub fn err_entity_too_large(total_size: i64, max_object_size: i64, bucket_name: &str, object_name: &str) -> ErrorResponse {
    let msg = format!(
        "Your proposed upload size ‘{}’ exceeds the maximum allowed object size ‘{}’ for single PUT operation.",
@@ -295,16 +284,6 @@ pub fn err_invalid_argument(message: &str) -> ErrorResponse {
    }
 }

-pub fn err_api_not_supported(message: &str) -> ErrorResponse {
-    ErrorResponse {
-        status_code: StatusCode::NOT_IMPLEMENTED,
-        code: S3ErrorCode::Custom("APINotSupported".into()),
-        message: message.to_string(),
-        request_id: "rustfs".to_string(),
-        ..Default::default()
-    }
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -135,6 +135,10 @@ impl Object {
        Self { ..Default::default() }
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity reader surface with no caller in this port (backlog#1823)"
+    )]
    fn do_get_request(&self, request: &GetRequest) -> Result<GetResponse, std::io::Error> {
        let _ = request.did_offset_change;
        let _ = request.offset;
@@ -150,12 +154,20 @@ impl Object {
        ))
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn set_offset(&mut self, bytes_read: i64) -> Result<(), std::io::Error> {
        self.curr_offset += bytes_read;

        Ok(())
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn read(&mut self, b: &[u8]) -> Result<i64, std::io::Error> {
        let mut read_req = GetRequest {
            is_read_op: true,
@@ -180,6 +192,10 @@ impl Object {
        Ok(response.size)
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn stat(&self) -> Result<ObjectInfo, std::io::Error> {
        if !self.is_started || !self.object_info_set {
            let _ = self.do_get_request(&GetRequest {
@@ -192,6 +208,10 @@ impl Object {
        Ok(self.object_info.clone())
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn read_at(&mut self, b: &[u8], offset: i64) -> Result<i64, std::io::Error> {
        self.curr_offset = offset;

@@ -219,6 +239,10 @@ impl Object {
        Ok(response.size)
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn seek(&mut self, offset: i64, whence: i64) -> Result<i64, std::io::Error> {
        if !self.is_started || !self.object_info_set {
            let seek_req = GetRequest {
@@ -253,6 +277,10 @@ impl Object {
        Ok(self.curr_offset)
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity Object reader method with no caller in this port (backlog#1823)"
+    )]
    fn close(&mut self) -> Result<(), std::io::Error> {
        self.is_closed = true;
        Ok(())
@@ -37,7 +37,7 @@ use crate::client::{
    api_put_object_common::optimal_part_info,
    api_put_object_multipart::UploadPartParams,
    api_s3_datatypes::{CompleteMultipartUpload, CompletePart, ObjectPart},
-    constants::{ISO8601_DATEFORMAT, MAX_MULTIPART_PUT_OBJECT_SIZE, MIN_PART_SIZE, TOTAL_WORKERS},
+    constants::{ISO8601_DATEFORMAT, MAX_MULTIPART_PUT_OBJECT_SIZE, MIN_PART_SIZE},
    credentials::SignatureType,
    transition_api::{ReaderImpl, TransitionClient, UploadInfo},
    utils::{is_amz_header, is_minio_header, is_rustfs_header, is_standard_header, is_storageclass_header},
@@ -30,10 +30,6 @@ pub fn is_object(reader: &ReaderImpl) -> bool {
    matches!(reader, ReaderImpl::ObjectBody(_))
 }

-pub fn is_read_at(reader: ReaderImpl) -> bool {
-    matches!(reader, ReaderImpl::ObjectBody(_))
-}
-
 pub fn optimal_part_info(object_size: i64, configured_part_size: u64) -> Result<(i64, i64, i64), std::io::Error> {
    let unknown_size;
    let mut object_size = object_size;
@@ -81,18 +81,6 @@ async fn read_multipart_part(reader: &mut ReaderImpl, want: usize) -> Result<Vec
    }
 }

-pub struct UploadedPartRes {
-    pub error: std::io::Error,
-    pub part_num: i64,
-    pub size: i64,
-    pub part: ObjectPart,
-}
-
-pub struct UploadPartReq {
-    pub part_num: i64,
-    pub part: ObjectPart,
-}
-
 impl TransitionClient {
    pub async fn put_object_multipart_stream(
        self: Arc<Self>,
@@ -29,10 +29,6 @@ use crate::client::utils::base64_decode;

 use super::transition_api;

-pub struct ListAllMyBucketsResult {
-    pub owner: Owner,
-}
-
 #[derive(Debug, Default, Serialize, Deserialize)]
 pub struct CommonPrefix {
    pub prefix: String,
@@ -89,6 +85,10 @@ pub struct ListVersionsResult {
    pub next_version_id_marker: String,
 }

+#[allow(
+    dead_code,
+    reason = "fields of a MinIO-parity list result that this port builds but never reads back (backlog#1823)"
+)]
 pub struct ListBucketResult {
    common_prefixes: Vec<CommonPrefix>,
    contents: Vec<transition_api::ObjectInfo>,
@@ -102,6 +102,10 @@ pub struct ListBucketResult {
    prefix: String,
 }

+#[allow(
+    dead_code,
+    reason = "fields of a MinIO-parity list result that this port builds but never reads back (backlog#1823)"
+)]
 pub struct ListMultipartUploadsResult {
    bucket: String,
    key_marker: String,
@@ -117,16 +121,15 @@ pub struct ListMultipartUploadsResult {
    common_prefixes: Vec<CommonPrefix>,
 }

+#[allow(
+    dead_code,
+    reason = "fields of a MinIO-parity list result that this port builds but never reads back (backlog#1823)"
+)]
 pub struct Initiator {
    id: String,
    display_name: String,
 }

-pub struct CopyObjectResult {
-    pub etag: String,
-    pub last_modified: OffsetDateTime,
-}
-
 #[derive(Debug, Clone)]
 pub struct ObjectPart {
    pub etag: String,
@@ -260,6 +263,7 @@ pub struct CompletePart {
 }

 impl CompletePart {
+    #[allow(dead_code, reason = "MinIO-parity accessor with no caller in this port (backlog#1823)")]
    fn checksum(&self, t: &ChecksumMode) -> String {
        match t {
            ChecksumMode::ChecksumCRC32C => {
@@ -284,11 +288,6 @@ impl CompletePart {
    }
 }

-pub struct CopyObjectPartResult {
-    pub etag: String,
-    pub last_modified: OffsetDateTime,
-}
-
 #[derive(Debug, Default, serde::Serialize)]
 #[serde(rename = "CompleteMultipartUpload")]
 pub struct CompleteMultipartUpload {
@@ -357,10 +356,10 @@ impl CompleteMultipartUpload {
    }
 }

-pub struct CreateBucketConfiguration {
-    pub location: String,
-}
-
+#[allow(
+    dead_code,
+    reason = "live via quick_xml::de::from_str in bucket_cache.rs; serde deserialization is not a construction (backlog#1823)"
+)]
 #[derive(serde::Serialize)]
 pub struct DeleteObject {
    //api has
@@ -368,21 +367,6 @@ pub struct DeleteObject {
    pub version_id: String,
 }

-pub struct DeletedObject {
-    //s3s has
-    pub key: String,
-    pub version_id: String,
-    pub deletemarker: bool,
-    pub deletemarker_version_id: String,
-}
-
-pub struct NonDeletedObject {
-    pub key: String,
-    pub code: String,
-    pub message: String,
-    pub version_id: String,
-}
-
 #[derive(serde::Serialize)]
 pub struct DeleteMultiObjects {
    pub quiet: bool,
@@ -402,6 +386,7 @@ impl DeleteMultiObjects {
        Ok(buf)
    }

+    #[allow(dead_code, reason = "MinIO-parity XML helper with no caller in this port (backlog#1823)")]
    pub fn unmarshal(buf: &[u8]) -> Result<Self, std::io::Error> {
        #[derive(Debug, Deserialize)]
        struct WireDeleteObject {
@@ -436,8 +421,3 @@ impl DeleteMultiObjects {
        })
    }
 }
-
-pub struct DeleteMultiObjectsResult {
-    pub deleted_objects: Vec<DeletedObject>,
-    pub undeleted_objects: Vec<NonDeletedObject>,
-}
@@ -365,6 +365,10 @@ mod tests {
 pub struct Checksum {
    checksum_type: ChecksumMode,
    r: Vec<u8>,
+    #[allow(
+        dead_code,
+        reason = "checksum bookkeeping field kept beside the value it guards (backlog#1823)"
+    )]
    computed: bool,
 }

@@ -32,8 +32,5 @@ pub const MAX_MULTIPART_PUT_OBJECT_SIZE: i64 = 1024 * 1024 * 1024 * 1024 * 5;
 pub const UNSIGNED_PAYLOAD: &str = "UNSIGNED-PAYLOAD";
 pub const UNSIGNED_PAYLOAD_TRAILER: &str = "STREAMING-UNSIGNED-PAYLOAD-TRAILER";

-pub const TOTAL_WORKERS: i64 = 4;
-
-pub const SIGN_V4_ALGORITHM: &str = "AWS4-HMAC-SHA256";
 pub const ISO8601_DATEFORMAT: &[FormatItem<'_>] =
    format_description!("[year]-[month]-[day]T[hour]:[minute]:[second].[subsecond]Z");
@@ -67,6 +67,10 @@ impl<P: Provider + Default> Credentials<P> {
        Ok(self.creds.clone())
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity credential surface with no caller in this port (backlog#1823)"
+    )]
    fn expire(&mut self) {
        self.force_refresh = true;
    }
@@ -133,6 +137,10 @@ impl Provider for Static {

 #[derive(Debug, Clone, Default)]
 pub struct STSError {
+    #[allow(
+        dead_code,
+        reason = "MinIO-parity STS error detail that this port never reads back (backlog#1823)"
+    )]
    pub r#type: String,
    pub code: String,
    pub message: String,
@@ -141,6 +149,10 @@ pub struct STSError {
 #[derive(Debug, Clone, thiserror::Error)]
 pub struct ErrorResponse {
    pub sts_error: STSError,
+    #[allow(
+        dead_code,
+        reason = "MinIO-parity STS error detail that this port never reads back (backlog#1823)"
+    )]
    pub request_id: String,
 }

@@ -158,22 +170,3 @@ impl ErrorResponse {
        return self.sts_error.message.clone();
    }
 }
-
-pub fn xml_decoder<T>(body: &[u8]) -> Result<T, Error>
-where
-    for<'de> T: Deserialize<'de>,
-{
-    match std::str::from_utf8(body) {
-        Ok(xml_body) => quick_xml::de::from_str::<T>(xml_body).map_err(|err| Error::new(ErrorKind::InvalidData, err.to_string())),
-        Err(err) => Err(Error::new(ErrorKind::InvalidData, err.to_string())),
-    }
-}
-
-pub fn xml_decode_and_body<T>(body_reader: &[u8]) -> Result<(Vec<u8>, T), std::io::Error>
-where
-    for<'de> T: Deserialize<'de>,
-{
-    let body = body_reader.to_vec();
-    let parsed = xml_decoder(&body)?;
-    Ok((body, parsed))
-}
@@ -13,7 +13,6 @@
 // limitations under the License.

 // #730: S3 client compatibility models are kept while ECStore callers move to narrower facades.
-#![allow(dead_code)]

 pub mod admin_handler_utils;
 pub mod api_error_response;
@@ -77,39 +77,6 @@ fn part_number_to_rangespec(oi: ObjectInfo, part_number: usize) -> Option<HTTPRa
    })
 }

-fn get_compressed_offsets(oi: ObjectInfo, offset: i64) -> (i64, i64, i64, i64, u64) {
-    let mut skip_length: i64 = 0;
-    let mut cumulative_actual_size: i64 = 0;
-    let mut first_part_idx: i64 = 0;
-    let mut compressed_offset: i64 = 0;
-    let mut part_skip: i64 = 0;
-    let mut decrypt_skip: i64 = 0;
-    let mut seq_num: u64 = 0;
-    for (i, part) in oi.parts.iter().enumerate() {
-        cumulative_actual_size += part.actual_size as i64;
-        if cumulative_actual_size <= offset {
-            compressed_offset += part.size as i64;
-        } else {
-            first_part_idx = i as i64;
-            skip_length = cumulative_actual_size - part.actual_size as i64;
-            break;
-        }
-    }
-    skip_length = offset - skip_length;
-
-    let parts: &[ObjectPartInfo] = &oi.parts;
-    if skip_length > 0
-        && parts.len() > first_part_idx as usize
-        && parts[first_part_idx as usize].index.as_ref().is_some_and(|idx| idx.len() > 0)
-    {
-        let _ = part_skip;
-        let _ = decrypt_skip;
-        let _ = seq_num;
-    }
-
-    (compressed_offset, part_skip, first_part_idx, decrypt_skip, seq_num)
-}
-
 pub fn new_getobjectreader<'a>(
    rs: &Option<HTTPRangeSpec>,
    oi: &'a ObjectInfo,
@@ -23,6 +23,7 @@ const X_OBS_VERSION_ID: &str = "x-obs-version-id";
 const MAX_REMOTE_VERSION_ID_LEN: usize = 1024;

 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[allow(dead_code, reason = "bucket versioning states kept as a complete vocabulary (backlog#1823)")]
 pub(crate) enum BucketVersioningState {
    Unknown,
    Disabled,
@@ -47,6 +48,7 @@ impl RemoteVersion {
        }
    }

+    #[allow(dead_code, reason = "MinIO-parity accessor with no caller in this port (backlog#1823)")]
    pub(crate) fn exact_request_id(&self) -> Result<Option<&str>, Error> {
        match self {
            Self::Unknown => Err(Error::new(
@@ -101,6 +101,10 @@ where

 const C_UNKNOWN: i32 = -1;
 const C_OFFLINE: i32 = 0;
+#[allow(
+    dead_code,
+    reason = "reachable only from the unused transition client methods below (backlog#1823)"
+)]
 const C_ONLINE: i32 = 1;

 fn invalid_utf8_header_error(scope: &str, header_name: &str) -> std::io::Error {
@@ -320,6 +324,10 @@ impl TransitionClient {
        Ok(client)
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client surface with no caller in this port (backlog#1823)"
+    )]
    fn endpoint_url(&self) -> Url {
        self.endpoint_url.clone()
    }
@@ -348,12 +356,20 @@ impl TransitionClient {
            .to_string())
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn trace_errors_only_off(&self) {
        if let Ok(mut trace_errors_only) = self.trace_errors_only.lock() {
            *trace_errors_only = false;
        }
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn trace_off(&self) {
        if let Ok(mut is_trace_enabled) = self.is_trace_enabled.lock() {
            *is_trace_enabled = false;
@@ -363,12 +379,20 @@ impl TransitionClient {
        }
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn set_s3_transfer_accelerate(&self, accelerate_endpoint: &str) {
        if let Ok(mut endpoint) = self.s3_accelerate_endpoint.lock() {
            *endpoint = accelerate_endpoint.to_string();
        }
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn set_s3_enable_dual_stack(&self, enabled: bool) {
        if let Ok(mut dual_stack) = self.s3_dual_stack_enabled.lock() {
            *dual_stack = enabled;
@@ -398,10 +422,18 @@ impl TransitionClient {
        (hash_algos, hash_sums)
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn is_online(&self) -> bool {
        !self.is_offline()
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn mark_offline(&self) {
        self.health_status
            .compare_exchange(C_ONLINE, C_OFFLINE, Ordering::SeqCst, Ordering::SeqCst);
@@ -411,10 +443,18 @@ impl TransitionClient {
        self.health_status.load(Ordering::SeqCst) == C_OFFLINE
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn health_check(hc_duration: Duration) {
        let _ = hc_duration;
    }

+    #[allow(
+        dead_code,
+        reason = "MinIO-parity transition client method with no caller in this port (backlog#1823)"
+    )]
    fn dump_http(&self, req: &Request<s3s::Body>, resp: &Response<Incoming>) -> Result<(), std::io::Error> {
        let mut resp_trace: Vec<u8>;

@@ -1102,6 +1142,7 @@ impl Default for ObjectInfo {
 }

 impl ObjectInfo {
+    #[allow(dead_code, reason = "MinIO-parity accessor with no caller in this port (backlog#1823)")]
    pub(crate) fn remote_version(
        &self,
        capabilities: ProviderVersionCapabilities,
@@ -48,10 +48,6 @@ lazy_static! {
    };
 }

-pub fn is_standard_query_value(qs_key: &str) -> bool {
-    SUPPORTED_QUERY_VALUES[qs_key]
-}
-
 pub fn is_storageclass_header(header_key: &str) -> bool {
    header_key.to_lowercase() == X_AMZ_STORAGE_CLASS.as_str().to_lowercase()
 }
@@ -12,6 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.

+//! Per-disk usage snapshots persisted under the metadata bucket.
+//!
+//! **Nothing calls into this module.** It landed complete with tests in #5307
+//! (2026-07-27) and its aggregation entry point,
+//! [`crate::data_usage::aggregate_local_snapshots`], has never had a caller in
+//! the tree's history. The live data-usage path is
+//! `load_data_usage_from_backend` / `store_data_usage_in_backend`. The items
+//! below therefore carry individual `dead_code` allows rather than a module
+//! blanket, so the gap stays greppable until it is either wired up or removed.
+
 use crate::data_usage::BucketUsageInfo;
 use crate::disk::RUSTFS_META_BUCKET;
 use crate::error::{Error, Result};
@@ -26,10 +36,12 @@ pub const DATA_USAGE_DIR: &str = "datausage";
 /// Directory used to store incremental scan state files under the metadata bucket.
 pub const DATA_USAGE_STATE_DIR: &str = "datausage/state";
 /// Snapshot file format version, allows forward compatibility if the structure evolves.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub const LOCAL_USAGE_SNAPSHOT_VERSION: u32 = 1;

 /// Additional metadata describing which disk produced the snapshot.
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub struct LocalUsageSnapshotMeta {
    /// Disk UUID stored as a string for simpler serialization.
    pub disk_id: String,
@@ -43,6 +55,7 @@ pub struct LocalUsageSnapshotMeta {

 /// Usage snapshot produced by a single disk.
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub struct LocalUsageSnapshot {
    /// Format version recorded in the snapshot.
    pub format_version: u32,
@@ -64,6 +77,7 @@ pub struct LocalUsageSnapshot {
    pub objects_total_size: u64,
 }

+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 impl LocalUsageSnapshot {
    /// Create an empty snapshot with the default format version filled in.
    pub fn new(meta: LocalUsageSnapshotMeta) -> Self {
@@ -99,11 +113,13 @@ impl LocalUsageSnapshot {
 }

 /// Build the snapshot file name `<disk-id>.json`.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub fn snapshot_file_name(disk_id: &str) -> String {
    format!("{disk_id}.json")
 }

 /// Build the object path relative to `RUSTFS_META_BUCKET`, e.g. `datausage/<disk-id>.json`.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub fn snapshot_object_path(disk_id: &str) -> String {
    format!("{}/{}", DATA_USAGE_DIR, snapshot_file_name(disk_id))
 }
@@ -119,11 +135,13 @@ pub fn data_usage_state_dir(root: &Path) -> PathBuf {
 }

 /// Build the absolute path to the snapshot file for the provided disk ID.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub fn snapshot_path(root: &Path, disk_id: &str) -> PathBuf {
    data_usage_dir(root).join(snapshot_file_name(disk_id))
 }

 /// Read a snapshot from disk if it exists.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub async fn read_snapshot(root: &Path, disk_id: &str) -> Result<Option<LocalUsageSnapshot>> {
    let path = snapshot_path(root, disk_id);
    match fs::read(&path).await {
@@ -138,6 +156,7 @@ pub async fn read_snapshot(root: &Path, disk_id: &str) -> Result<Option<LocalUsa
 }

 /// Persist a snapshot to disk, creating directories as needed and overwriting any existing file.
+#[allow(dead_code, reason = "unwired local usage-snapshot feature; see module docs (backlog#1823)")]
 pub async fn write_snapshot(root: &Path, disk_id: &str, snapshot: &LocalUsageSnapshot) -> Result<()> {
    let dir = data_usage_dir(root);
    fs::create_dir_all(&dir).await.map_err(Error::other)?;
@@ -13,7 +13,6 @@
 // limitations under the License.

 // #730: scanner/data-usage state is partially migrated and still owns staged cache helpers.
-#![allow(dead_code)]

 pub mod local_snapshot;

@@ -34,8 +33,8 @@ 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, DATA_USAGE_OBSERVED_OBJECT_NAME,
-    DataUsageCache, DataUsageEntry, DataUsageInfo, DiskUsageStatus, LEGACY_DATA_USAGE_OBJECT_NAME, SizeHistogram, SizeSummary,
-    VersionsHistogram, observed_data_usage_is_newer,
+    DataUsageCache, DataUsageInfo, DiskUsageStatus, LEGACY_DATA_USAGE_OBJECT_NAME, SizeHistogram, VersionsHistogram,
+    observed_data_usage_is_newer,
 };
 use rustfs_io_metrics::record_system_path_failure;
 use rustfs_utils::path::SLASH_SEPARATOR;
@@ -55,7 +54,6 @@ use tracing::{debug, error, info, instrument};
 // Data usage storage constants
 pub const DATA_USAGE_ROOT: &str = SLASH_SEPARATOR;
 const DATA_COMPRESSION_TOTAL_NAME: &str = ".compression.json";
-const DATA_USAGE_BLOOM_NAME: &str = ".bloomcycle.bin";
 pub const DATA_USAGE_CACHE_NAME: &str = ".usage-cache.bin";
 const DATA_USAGE_CACHE_TTL_SECS: u64 = 30;
 const LIVE_BUCKET_USAGE_MAX_ENTRIES: u64 = 1024;
@@ -313,11 +311,6 @@ lazy_static::lazy_static! {
        LEGACY_DATA_USAGE_OBJECT_NAME
    );
    static ref LEGACY_DATA_USAGE_OBJ_BACKUP_PATH: String = format!("{}.bkp", LEGACY_DATA_USAGE_OBJ_NAME_PATH.as_str());
-    pub static ref DATA_USAGE_BLOOM_NAME_PATH: String = format!("{}{}{}",
-        crate::disk::BUCKET_META_PREFIX,
-        SLASH_SEPARATOR,
-        DATA_USAGE_BLOOM_NAME
-    );
    pub static ref DATA_COMPRESSION_TOTAL_NAME_PATH: String = format!("{}{}{}",
        crate::disk::BUCKET_META_PREFIX,
        SLASH_SEPARATOR,
@@ -858,6 +851,10 @@ async fn resolve_loaded_snapshot_pair_with_source(
    }
 }

+#[allow(
+    dead_code,
+    reason = "primary/backup snapshot fallback asserted by this file's tests (backlog#1823)"
+)]
 async fn resolve_loaded_snapshot(
    primary: Result<Vec<u8>, Error>,
    backup: impl Future<Output = Result<Vec<u8>, Error>>,
@@ -1187,6 +1184,10 @@ pub async fn invalidate_admin_data_usage_snapshot_cache() {
 }

 /// Aggregate usage information from local disk snapshots.
+#[allow(
+    dead_code,
+    reason = "reached only through aggregate_local_snapshots, which has no caller (backlog#1823)"
+)]
 fn merge_snapshot(aggregated: &mut DataUsageInfo, mut snapshot: LocalUsageSnapshot, latest_update: &mut Option<SystemTime>) {
    if let Some(update) = snapshot.last_update
        && latest_update.is_none_or(|current| update > current)
@@ -1220,6 +1221,10 @@ fn merge_snapshot(aggregated: &mut DataUsageInfo, mut snapshot: LocalUsageSnapsh
    }
 }

+#[allow(
+    dead_code,
+    reason = "entry point of the local usage-snapshot feature, which has had no caller since it landed in #5307 (backlog#1823)"
+)]
 pub async fn aggregate_local_snapshots(store: Arc<ECStore>) -> Result<(Vec<DiskUsageStatus>, DataUsageInfo), Error> {
    let mut aggregated = DataUsageInfo::default();
    let mut latest_update: Option<SystemTime> = None;
@@ -1767,11 +1772,6 @@ pub async fn record_bucket_object_write_unknown_previous_memory(bucket: &str, ne
    entry.pending_scanner_position = None;
 }

-/// Fast in-memory increment for immediate quota consistency.
-pub async fn increment_bucket_usage_memory(bucket: &str, size_increment: u64) {
-    record_bucket_object_write_memory(bucket, None, size_increment).await;
-}
-
 /// Fast in-memory update for successful object deletes.
 pub async fn record_bucket_object_delete_memory(bucket: &str, deleted_size: u64, removed_current_object: bool) {
    ensure_bucket_usage_cached(bucket).await;
@@ -1814,11 +1814,6 @@ pub async fn record_bucket_delete_marker_memory(bucket: &str) {
    entry.pending_scanner_position = None;
 }

-/// Fast in-memory decrement for immediate quota consistency
-pub async fn decrement_bucket_usage_memory(bucket: &str, size_decrement: u64) {
-    record_bucket_object_delete_memory(bucket, size_decrement, size_decrement > 0).await;
-}
-
 /// Get bucket usage from the authoritative cache for this topology.
 async fn get_persisted_bucket_usage(bucket: &str) -> Option<u64> {
    let store = runtime_sources::object_store_handle()?;
@@ -2013,91 +2008,6 @@ pub async fn apply_bucket_usage_memory_overlay(data_usage_info: &mut DataUsageIn
    apply_bucket_usage_memory_overlay_if_authoritative(data_usage_info, authoritative).await;
 }

-/// Sync memory cache with backend data (called by scanner)
-pub async fn sync_memory_cache_with_backend() -> Result<(), Error> {
-    if let Some(store) = runtime_sources::object_store_handle() {
-        match load_data_usage_from_backend(store.clone()).await {
-            Ok(data_usage_info) => {
-                replace_bucket_usage_memory_from_info(&data_usage_info).await;
-            }
-            Err(e) => {
-                debug!("Failed to sync memory cache with backend: {}", e);
-            }
-        }
-    }
-    Ok(())
-}
-
-/// Create a data usage cache entry from size summary
-pub fn create_cache_entry_from_summary(summary: &SizeSummary) -> DataUsageEntry {
-    let mut entry = DataUsageEntry::default();
-    entry.add_sizes(summary);
-    entry
-}
-
-/// Convert data usage cache to DataUsageInfo
-pub fn cache_to_data_usage_info(
-    cache: &DataUsageCache,
-    path: &str,
-    buckets: &[crate::storage_api_contracts::bucket::BucketInfo],
-) -> DataUsageInfo {
-    let e = match cache.find(path) {
-        Some(e) => e,
-        None => return DataUsageInfo::default(),
-    };
-    let flat = cache.flatten(&e);
-
-    let mut buckets_usage = HashMap::new();
-    for bucket in buckets.iter() {
-        let e = match cache.find(&bucket.name) {
-            Some(e) => e,
-            None => continue,
-        };
-        let flat = cache.flatten(&e);
-        let mut bui = BucketUsageInfo {
-            size: flat.size as u64,
-            versions_count: flat.versions as u64,
-            objects_count: flat.objects as u64,
-            delete_markers_count: flat.delete_markers as u64,
-            object_size_histogram: flat.obj_sizes.to_map(),
-            object_versions_histogram: flat.obj_versions.to_map(),
-            ..Default::default()
-        };
-
-        if let Some(rs) = &flat.replication_stats {
-            bui.replica_size = rs.replica_size;
-            bui.replica_count = rs.replica_count;
-
-            for (arn, stat) in rs.targets.iter() {
-                bui.replication_info.insert(
-                    arn.clone(),
-                    BucketTargetUsageInfo {
-                        replication_pending_size: stat.pending_size,
-                        replicated_size: stat.replicated_size,
-                        replication_failed_size: stat.failed_size,
-                        replication_pending_count: stat.pending_count,
-                        replication_failed_count: stat.failed_count,
-                        replicated_count: stat.replicated_count,
-                        ..Default::default()
-                    },
-                );
-            }
-        }
-        buckets_usage.insert(bucket.name.clone(), bui);
-    }
-
-    DataUsageInfo {
-        last_update: cache.info.last_update,
-        objects_total_count: flat.objects as u64,
-        versions_total_count: flat.versions as u64,
-        delete_markers_total_count: flat.delete_markers as u64,
-        objects_total_size: flat.size as u64,
-        buckets_count: e.children.len() as u64,
-        buckets_usage,
-        ..Default::default()
-    }
-}
-
 // Helper functions for DataUsageCache operations
 pub async fn load_data_usage_cache(store: &crate::set_disk::SetDisks, name: &str) -> crate::error::Result<DataUsageCache> {
    use crate::disk::{BUCKET_META_PREFIX, RUSTFS_META_BUCKET};
@@ -190,6 +190,17 @@ pub(crate) const GET_METADATA_CACHE_REASON_VERSION_SUSPENDED: &str = "version_su
 pub(crate) const GET_METADATA_CACHE_REASON_VERSIONED: &str = "versioned";
 pub(crate) const GET_METADATA_EARLY_STOP_REASON_CONFLICTING_METADATA: &str = "conflicting_metadata";
 pub(crate) const GET_METADATA_EARLY_STOP_REASON_DELETE_MARKER: &str = "delete_marker";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY: &str = "data_read_inline_body_verify";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_DELETED: &str = "data_read_inline_deleted";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY: &str = "data_read_inline_geometry";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH: &str = "data_read_inline_identity_mismatch";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD: &str = "data_read_inline_missing_payload";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD: &str = "data_read_inline_missing_shard";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_NOT_INLINE: &str = "data_read_inline_not_inline";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE: &str = "data_read_inline_part_shape";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_REMOTE: &str = "data_read_inline_remote";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE: &str = "data_read_inline_size";
+pub(crate) const GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_TRANSFORMED: &str = "data_read_inline_transformed";
 pub(crate) const GET_METADATA_EARLY_STOP_REASON_ERROR: &str = "error";
 pub(crate) const GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM: &str = "insufficient_quorum";
 pub(crate) const GET_METADATA_EARLY_STOP_REASON_NOT_FOUND: &str = "not_found";
@@ -551,6 +562,32 @@ mod tests {
        assert_eq!(GET_METADATA_CACHE_REASON_VERSIONED, "versioned");
        assert_eq!(GET_METADATA_EARLY_STOP_REASON_CONFLICTING_METADATA, "conflicting_metadata");
        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DELETE_MARKER, "delete_marker");
+        assert_eq!(
+            GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY,
+            "data_read_inline_body_verify"
+        );
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_DELETED, "data_read_inline_deleted");
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY, "data_read_inline_geometry");
+        assert_eq!(
+            GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH,
+            "data_read_inline_identity_mismatch"
+        );
+        assert_eq!(
+            GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD,
+            "data_read_inline_missing_payload"
+        );
+        assert_eq!(
+            GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD,
+            "data_read_inline_missing_shard"
+        );
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_NOT_INLINE, "data_read_inline_not_inline");
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE, "data_read_inline_part_shape");
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_REMOTE, "data_read_inline_remote");
+        assert_eq!(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE, "data_read_inline_size");
+        assert_eq!(
+            GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_TRANSFORMED,
+            "data_read_inline_transformed"
+        );
        assert_eq!(GET_METADATA_EARLY_STOP_REASON_ERROR, "error");
        assert_eq!(GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM, "insufficient_quorum");
        assert_eq!(GET_METADATA_EARLY_STOP_REASON_NOT_FOUND, "not_found");
@@ -1075,9 +1075,6 @@ pub struct GenericError {

 #[derive(Debug, thiserror::Error, PartialEq, Eq)]
 pub enum ObjectApiError {
-    #[error("BackendDown")]
-    BackendDown(String),
-
    #[error("The operation is not valid for the current state of the object {}/{}({})", .0.bucket, .0.object, .0.version_id)]
    InvalidObjectState(GenericError),
 }
@@ -1094,72 +1091,6 @@ pub struct ErrorResponse {
    pub host_id: String,
 }

-pub fn error_resp_to_object_err(err: ErrorResponse, params: Vec<&str>) -> std::io::Error {
-    let mut bucket = "";
-    let mut object = "";
-    let mut version_id = "";
-    if !params.is_empty() {
-        bucket = params[0];
-    }
-    if params.len() >= 2 {
-        object = params[1];
-    }
-    if params.len() >= 3 {
-        version_id = params[2];
-    }
-
-    if is_network_or_host_down(&err.to_string(), false) {
-        return std::io::Error::other(ObjectApiError::BackendDown(format!("{err}")));
-    }
-
-    let err_ = std::io::Error::other(err.to_string());
-    let r_err = err;
-    let err;
-    let bucket = bucket.to_string();
-    let object = object.to_string();
-    let version_id = version_id.to_string();
-
-    match r_err.code {
-        S3ErrorCode::BucketNotEmpty => {
-            err = std::io::Error::other(StorageError::BucketNotEmpty("".to_string()).to_string());
-        }
-        S3ErrorCode::InvalidBucketName => {
-            err = std::io::Error::other(StorageError::BucketNameInvalid(bucket));
-        }
-        S3ErrorCode::InvalidPart => {
-            err = std::io::Error::other(StorageError::InvalidPart(0, bucket, object /* , version_id */));
-        }
-        S3ErrorCode::NoSuchBucket => {
-            err = std::io::Error::other(StorageError::BucketNotFound(bucket));
-        }
-        S3ErrorCode::NoSuchKey => {
-            if !object.is_empty() {
-                err = std::io::Error::other(StorageError::ObjectNotFound(bucket, object));
-            } else {
-                err = std::io::Error::other(StorageError::BucketNotFound(bucket));
-            }
-        }
-        S3ErrorCode::NoSuchVersion => {
-            if !object.is_empty() {
-                err = std::io::Error::other(StorageError::ObjectNotFound(bucket, object)); //, version_id);
-            } else {
-                err = std::io::Error::other(StorageError::BucketNotFound(bucket));
-            }
-        }
-        S3ErrorCode::AccessDenied => {
-            err = std::io::Error::other(StorageError::PrefixAccessDenied(bucket, object));
-        }
-        S3ErrorCode::NoSuchUpload => {
-            err = std::io::Error::other(StorageError::InvalidUploadID(bucket, object, version_id));
-        }
-        _ => {
-            err = err_;
-        }
-    }
-
-    err
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -20,6 +20,10 @@ use std::sync::atomic::AtomicI64;
 /// this type never grew past its counter. `total_events` is read by the
 /// notifier's log line but nothing increments it, so that field reports zero.
 #[derive(Default)]
+#[allow(
+    dead_code,
+    reason = "held only by the dead ecstore EventNotifier; see services/event_notification.rs (backlog#1823)"
+)]
 pub struct TargetList {
    pub total_events: AtomicI64,
 }
@@ -704,6 +704,7 @@ pub(crate) async fn create_bitrot_reader_from_bytes_with_stage_metrics(
 }

 #[allow(clippy::too_many_arguments)]
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub fn create_deferred_bitrot_reader(
    inline_data: Option<Bytes>,
    disk: Option<DiskStore>,
@@ -31,6 +31,13 @@ pub const ENV_DISK_COMPRESSION_MIME_TYPES: &str = "RUSTFS_COMPRESSION_MIME_TYPES
 // Environment variable for additional extensions to exclude from compression (comma-separated, e.g. ".foo,.bar")
 pub const ENV_ADDED_EXCLUDE_COMPRESS_EXTENSIONS: &str = "RUSTFS_ADDED_EXCLUDE_COMPRESS_EXTENSIONS";

+// Environment variable to additionally enable disk compression for multipart uploads.
+// Default off: nodes from before the resumable decompressor fix fail transient reads of
+// compressed objects, so multipart compression stays dark until the operator confirms the
+// fleet has converged on a fixed build.
+// RUSTFS_COMPAT_TODO(multipart-compression-default-off-window): staged rollout switch for restored multipart compression, flipping the default to enabled on retirement. Remove after the minimum supported direct-upgrade release ships the resumable DecompressReader.
+pub const ENV_DISK_COMPRESSION_MULTIPART_ENABLED: &str = "RUSTFS_COMPRESSION_MULTIPART_ENABLED";
+
 pub const DEFAULT_DISK_COMPRESS_EXTENSIONS: &str = ".txt,.log,.csv,.json,.tar,.xml,.bin";
 pub const DEFAULT_DISK_COMPRESS_MIME_TYPES: &str = "text/*,application/json,application/xml,binary/octet-stream";

@@ -171,6 +178,21 @@ pub fn is_disk_compression_enabled() -> bool {
    DISK_COMPRESSION_CONFIG.get_or_init(parse_disk_compression_config).enabled
 }

+// Parsed once at first use, mirroring DISK_COMPRESSION_CONFIG.
+static MULTIPART_DISK_COMPRESSION_ENABLED: OnceLock<bool> = OnceLock::new();
+
+/// Whether multipart uploads may advertise disk compression. Requires the
+/// regular disk-compression gates to pass as well; this is the staged-rollout
+/// switch that keeps multipart compression dark during rolling upgrades from
+/// builds whose decompressor was not yet resumable.
+pub fn is_multipart_disk_compression_enabled() -> bool {
+    *MULTIPART_DISK_COMPRESSION_ENABLED.get_or_init(|| {
+        env::var(ENV_DISK_COMPRESSION_MULTIPART_ENABLED)
+            .map(|s| matches!(s.to_ascii_lowercase().as_str(), "true" | "on" | "1"))
+            .unwrap_or(false)
+    })
+}
+
 fn is_disk_compressible_with_config(headers: &http::HeaderMap, object_name: &str, config: &DiskCompressionConfig) -> bool {
    // Check if disk compression is enabled (read once at first use, then fixed for process lifetime)
    if !config.enabled {
@@ -22,7 +22,7 @@ use crate::bucket::replication::{
 use crate::bucket::versioning::VersioningApi as _;
 use crate::config::storageclass;
 use crate::error::{Error, Result};
-use crate::io_support::rio::{HashReader, LimitReader};
+use crate::io_support::rio::{HardLimitReader, HashReader};
 use crate::storage_api_contracts::{
    lifecycle::{ExpirationOptions, TransitionedObject},
    range::HTTPRangeSpec,
@@ -479,7 +479,15 @@ enum ReadTransform {
    },
 }

-struct ReadPlan {
+/// How an object's stored bytes must be fetched and transformed to serve a
+/// request.
+///
+/// Public so callers that fetch the stored bytes from somewhere other than the
+/// local erasure set — the remote-tier read path — can position their own fetch
+/// with [`ReadPlan::storage_offset`] / [`ReadPlan::storage_length`] and then
+/// hand the resulting stream to [`ReadPlan::into_object_reader`], instead of
+/// reimplementing the transform decisions (rustfs/rustfs#6025).
+pub struct ReadPlan {
    storage_offset: usize,
    storage_length: i64,
    object_size: i64,
@@ -487,6 +495,43 @@ struct ReadPlan {
 }

 impl ReadPlan {
+    /// Byte offset into the object's **stored** bytes where the fetch must
+    /// start. Encrypted and compressed objects address their storage in a
+    /// different coordinate system than the plaintext range the caller asked
+    /// for, which is exactly the distinction this plan resolves.
+    pub fn storage_offset(&self) -> usize {
+        self.storage_offset
+    }
+
+    /// Number of **stored** bytes the fetch must deliver, in the same
+    /// coordinate system as [`Self::storage_offset`].
+    pub fn storage_length(&self) -> i64 {
+        self.storage_length
+    }
+
+    /// Build the plan for a request without consuming a stream, so a caller
+    /// that has to issue its own positioned fetch can read the offsets first.
+    pub async fn build_for_request(
+        rs: Option<HTTPRangeSpec>,
+        oi: &ObjectInfo,
+        opts: &ObjectOptions,
+        h: &HeaderMap<HeaderValue>,
+        resolver: Option<&dyn ObjectEncryptionResolver>,
+    ) -> Result<Self> {
+        Self::build_with_resolver(rs, oi, opts, h, resolver).await
+    }
+
+    /// Wrap `reader` — the stored bytes this plan asked for, already positioned
+    /// at [`Self::storage_offset`] — in the transforms that turn them into the
+    /// bytes the caller requested.
+    pub fn into_object_reader(
+        self,
+        reader: Box<dyn AsyncRead + Unpin + Send + Sync>,
+        oi: &ObjectInfo,
+    ) -> Result<GetObjectReader> {
+        self.into_reader(reader, oi).map(|(reader, _, _)| reader)
+    }
+
    #[cfg(test)]
    async fn build(rs: Option<HTTPRangeSpec>, oi: &ObjectInfo, opts: &ObjectOptions, h: &HeaderMap<HeaderValue>) -> Result<Self> {
        Self::build_with_resolver(rs, oi, opts, h, Some(&tests::TEST_RESOLVER)).await
@@ -500,8 +545,17 @@ impl ReadPlan {
        resolver: Option<&dyn ObjectEncryptionResolver>,
    ) -> Result<Self> {
        let mut rs = rs;
+        // A part number addresses the object's PLAINTEXT bytes. A restore read
+        // serves the stored representation instead (see
+        // [`restore_request_active`]), where that synthesized range would be
+        // reinterpreted as a storage range and truncate an encrypted or
+        // compressed payload by exactly its encoding overhead — the copy-back
+        // then fails its length check partway through
+        // (rustfs/rustfs#6025). An explicit caller range is already in storage
+        // coordinates on that path and is still honored.
        if let Some(part_number) = opts.part_number
            && rs.is_none()
+            && !restore_request_active(opts)
        {
            rs = http_range_spec_from_object_info(oi, part_number);
        }
@@ -754,7 +808,7 @@ impl ReadPlan {
                        }
                    }
                } else {
-                    Box::new(LimitReader::new(dec_reader, total_plaintext_size))
+                    Box::new(HardLimitReader::new(dec_reader, decompressed_length))
                };

                let mut object_info = oi.clone();
@@ -846,7 +900,7 @@ impl ReadPlan {
                            )?;
                            Box::new(ranged_reader)
                        } else {
-                            Box::new(LimitReader::new(decompressed_reader, total_plaintext_size))
+                            Box::new(HardLimitReader::new(decompressed_reader, total_plaintext_size_i64))
                        }
                    } else if plaintext_offset > 0 || plaintext_length != total_plaintext_size_i64 {
                        Box::new(RangedDecompressReader::new(
@@ -856,7 +910,7 @@ impl ReadPlan {
                            total_plaintext_size,
                        )?)
                    } else {
-                        Box::new(LimitReader::new(decrypted_reader, total_plaintext_size))
+                        Box::new(HardLimitReader::new(decrypted_reader, total_plaintext_size_i64))
                    };

                let mut object_info = oi.clone();
@@ -1727,6 +1781,423 @@ mod tests {
        assert_eq!(actual, b"fghijkl");
    }

+    /// Compresses one multipart part exactly like the write path does
+    /// (`WritePlan::with_compression` wraps each part in its own
+    /// `compression_reader`), returning the on-disk bytes and the storage-format
+    /// compression index.
+    async fn compressed_part_fixture(data: &[u8]) -> (Vec<u8>, Option<Bytes>) {
+        use crate::io_support::rio::TryGetIndex as _;
+        let mut compressor =
+            crate::io_support::rio::compression_reader(Cursor::new(data.to_vec()), CompressionAlgorithm::default(), false);
+        let mut compressed = Vec::new();
+        compressor.read_to_end(&mut compressed).await.expect("compress part stream");
+        let index = compressor
+            .try_get_index()
+            .map(crate::io_support::rio::compression_index_storage_bytes);
+        (compressed, index)
+    }
+
+    struct CompressedMultipartFixture {
+        object_info: ObjectInfo,
+        stored: Vec<u8>,
+        plaintext: Vec<u8>,
+    }
+
+    /// Builds the on-disk representation of a compressed multipart object: each
+    /// part is an independent compressed stream and the storage layer serves
+    /// their concatenation.
+    async fn compressed_multipart_fixture(part_sizes: &[usize]) -> CompressedMultipartFixture {
+        let pattern = b"compressed multipart read path fixture data ";
+        let mut plaintext = Vec::new();
+        let mut stored = Vec::new();
+        let mut parts = Vec::with_capacity(part_sizes.len());
+
+        for (i, part_size) in part_sizes.iter().enumerate() {
+            let mut part_plaintext = Vec::with_capacity(*part_size);
+            while part_plaintext.len() < *part_size {
+                part_plaintext.extend_from_slice(pattern);
+                part_plaintext.push(i as u8);
+            }
+            part_plaintext.truncate(*part_size);
+
+            let (compressed, index) = compressed_part_fixture(&part_plaintext).await;
+            parts.push(ObjectPartInfo {
+                number: i + 1,
+                size: compressed.len(),
+                actual_size: *part_size as i64,
+                index,
+                ..Default::default()
+            });
+            stored.extend_from_slice(&compressed);
+            plaintext.extend_from_slice(&part_plaintext);
+        }
+
+        let mut user_defined = HashMap::new();
+        rustfs_utils::http::insert_str(
+            &mut user_defined,
+            rustfs_utils::http::SUFFIX_COMPRESSION,
+            crate::io_support::rio::compression_metadata_value(CompressionAlgorithm::default()),
+        );
+        rustfs_utils::http::insert_str(&mut user_defined, rustfs_utils::http::SUFFIX_ACTUAL_SIZE, plaintext.len().to_string());
+
+        let object_info = ObjectInfo {
+            bucket: "test-bucket".to_string(),
+            name: "compressed-multipart".to_string(),
+            size: stored.len() as i64,
+            etag: Some(format!("6bcf86bed8807b8e78f0fc6e0a53079d-{}", part_sizes.len())),
+            parts: Arc::new(parts),
+            user_defined: Arc::new(user_defined),
+            ..Default::default()
+        };
+
+        CompressedMultipartFixture {
+            object_info,
+            stored,
+            plaintext,
+        }
+    }
+
+    /// Plans the read once to learn the storage window, then serves exactly that
+    /// window — mirroring how `set_disk` feeds the erasure read into the
+    /// returned reader.
+    async fn read_compressed_multipart(
+        fixture: &CompressedMultipartFixture,
+        rs: Option<HTTPRangeSpec>,
+        opts: &ObjectOptions,
+    ) -> Vec<u8> {
+        let headers = HeaderMap::new();
+        let (_, offset, length) =
+            GetObjectReader::new(Box::new(Cursor::new(Vec::new())), rs.clone(), &fixture.object_info, opts, &headers)
+                .await
+                .expect("plan compressed multipart read");
+
+        let end = offset + usize::try_from(length).expect("storage window length must be non-negative");
+        assert!(
+            end <= fixture.stored.len(),
+            "planned storage window {offset}..{end} exceeds stored stream of {} bytes",
+            fixture.stored.len()
+        );
+        let window = fixture.stored[offset..end].to_vec();
+
+        let (mut reader, replay_offset, replay_length) =
+            GetObjectReader::new(Box::new(Cursor::new(window)), rs, &fixture.object_info, opts, &headers)
+                .await
+                .expect("build compressed multipart reader");
+        assert_eq!((replay_offset, replay_length), (offset, length), "read plan must be deterministic");
+
+        reader.read_all().await.expect("read compressed multipart stream")
+    }
+
+    /// Byte pattern with a 2 KiB period: it compresses extremely well while
+    /// looking nothing like ASCII fixtures. Mirrors the e2e generator that
+    /// exposed a truncated full GET on high-ratio multipart payloads.
+    fn high_ratio_binary_payload(size: usize, seed: u8) -> Vec<u8> {
+        (0..size)
+            .map(|i| ((i as u64).wrapping_mul(2_654_435_761).wrapping_add(seed as u64) >> 3) as u8)
+            .collect()
+    }
+
+    #[tokio::test]
+    async fn compressed_multipart_full_get_handles_high_ratio_binary_payload() {
+        let part_sizes = [5 * 1024 * 1024_usize, 1024 * 1024];
+        let mut plaintext = Vec::new();
+        let mut stored = Vec::new();
+        let mut parts = Vec::with_capacity(part_sizes.len());
+
+        for (i, part_size) in part_sizes.iter().enumerate() {
+            let part_plaintext = high_ratio_binary_payload(*part_size, if i == 0 { 7 } else { 61 });
+            let (compressed, index) = compressed_part_fixture(&part_plaintext).await;
+            parts.push(ObjectPartInfo {
+                number: i + 1,
+                size: compressed.len(),
+                actual_size: *part_size as i64,
+                index,
+                ..Default::default()
+            });
+            stored.extend_from_slice(&compressed);
+            plaintext.extend_from_slice(&part_plaintext);
+        }
+
+        let mut user_defined = HashMap::new();
+        rustfs_utils::http::insert_str(
+            &mut user_defined,
+            rustfs_utils::http::SUFFIX_COMPRESSION,
+            crate::io_support::rio::compression_metadata_value(CompressionAlgorithm::default()),
+        );
+        rustfs_utils::http::insert_str(&mut user_defined, rustfs_utils::http::SUFFIX_ACTUAL_SIZE, plaintext.len().to_string());
+        let fixture = CompressedMultipartFixture {
+            object_info: ObjectInfo {
+                bucket: "test-bucket".to_string(),
+                name: "high-ratio-multipart".to_string(),
+                size: stored.len() as i64,
+                etag: Some("6bcf86bed8807b8e78f0fc6e0a53079d-2".to_string()),
+                parts: Arc::new(parts),
+                user_defined: Arc::new(user_defined),
+                ..Default::default()
+            },
+            stored,
+            plaintext,
+        };
+
+        let read = read_compressed_multipart(&fixture, None, &ObjectOptions::default()).await;
+
+        assert_eq!(read.len(), fixture.plaintext.len(), "full GET must return the logical size");
+        assert_eq!(read, fixture.plaintext, "high-ratio multipart payload must survive the roundtrip");
+    }
+
+    /// Full GET over a compressed multipart object must decode across part
+    /// boundaries: every part is an independent compressed stream (this is also
+    /// the on-disk shape written by builds before rustfs/rustfs#5169 disabled
+    /// multipart compression, so this pins legacy-object readability).
+    #[tokio::test]
+    async fn compressed_multipart_full_get_decodes_across_part_boundaries() {
+        let fixture = compressed_multipart_fixture(&[3 * 1024 * 1024, 2 * 1024 * 1024, 512 * 1024]).await;
+
+        let read = read_compressed_multipart(&fixture, None, &ObjectOptions::default()).await;
+
+        assert_eq!(read.len(), fixture.plaintext.len(), "full GET must return the logical size");
+        assert_eq!(read, fixture.plaintext, "full GET must reassemble all parts");
+    }
+
+    #[tokio::test]
+    async fn compressed_multipart_range_get_crosses_part_boundary() {
+        let fixture = compressed_multipart_fixture(&[3 * 1024 * 1024, 2 * 1024 * 1024]).await;
+        let boundary = 3 * 1024 * 1024_i64;
+        let rs = HTTPRangeSpec {
+            is_suffix_length: false,
+            start: boundary - 100_000,
+            end: boundary + 100_000 - 1,
+        };
+
+        let read = read_compressed_multipart(&fixture, Some(rs), &ObjectOptions::default()).await;
+
+        let expected = &fixture.plaintext[(boundary - 100_000) as usize..(boundary + 100_000) as usize];
+        assert_eq!(read, expected, "boundary-crossing range must splice both parts");
+    }
+
+    #[tokio::test]
+    async fn compressed_multipart_range_get_seeks_into_later_part() {
+        let fixture = compressed_multipart_fixture(&[3 * 1024 * 1024, 4 * 1024 * 1024]).await;
+        // Deep inside part 2 so the plan skips part 1 entirely and (when the
+        // part carries an index) seeks within part 2.
+        let start = 3 * 1024 * 1024_i64 + 2 * 1024 * 1024_i64 + 137;
+        let rs = HTTPRangeSpec {
+            is_suffix_length: false,
+            start,
+            end: start + 64 * 1024 - 1,
+        };
+
+        let read = read_compressed_multipart(&fixture, Some(rs), &ObjectOptions::default()).await;
+
+        let expected = &fixture.plaintext[start as usize..(start + 64 * 1024) as usize];
+        assert_eq!(read, expected, "range inside a later part must decode from that part");
+    }
+
+    /// Parts written without a compression index (small parts skip the index in
+    /// the rio-v2 backend) must still be rangeable: the plan starts at the part
+    /// boundary and skips decompressed bytes.
+    #[tokio::test]
+    async fn compressed_multipart_range_get_works_without_part_indexes() {
+        let mut fixture = compressed_multipart_fixture(&[1024 * 1024, 1024 * 1024]).await;
+        let parts = fixture
+            .object_info
+            .parts
+            .iter()
+            .map(|part| ObjectPartInfo {
+                index: None,
+                ..part.clone()
+            })
+            .collect::<Vec<_>>();
+        fixture.object_info.parts = Arc::new(parts);
+
+        let start = 1024 * 1024_i64 + 4096;
+        let rs = HTTPRangeSpec {
+            is_suffix_length: false,
+            start,
+            end: start + 32 * 1024 - 1,
+        };
+
+        let read = read_compressed_multipart(&fixture, Some(rs), &ObjectOptions::default()).await;
+
+        let expected = &fixture.plaintext[start as usize..(start + 32 * 1024) as usize];
+        assert_eq!(read, expected, "index-less parts must fall back to part-boundary skip");
+    }
+
+    #[tokio::test]
+    async fn compressed_multipart_part_number_get_returns_single_part() {
+        let part_sizes = [3 * 1024 * 1024, 2 * 1024 * 1024, 512 * 1024];
+        let fixture = compressed_multipart_fixture(&part_sizes).await;
+
+        let mut logical_offset = 0_usize;
+        for (i, part_size) in part_sizes.iter().enumerate() {
+            let opts = ObjectOptions {
+                part_number: Some(i + 1),
+                ..Default::default()
+            };
+
+            let read = read_compressed_multipart(&fixture, None, &opts).await;
+
+            let expected = &fixture.plaintext[logical_offset..logical_offset + part_size];
+            assert_eq!(read.len(), *part_size, "partNumber={} GET must return the part's logical size", i + 1);
+            assert_eq!(read, expected, "partNumber={} GET must return the original part bytes", i + 1);
+            logical_offset += part_size;
+        }
+    }
+
+    #[tokio::test]
+    async fn compressed_multipart_suffix_range_reads_tail() {
+        let fixture = compressed_multipart_fixture(&[3 * 1024 * 1024, 1024 * 1024]).await;
+        let suffix_len = 128 * 1024_i64;
+        let rs = HTTPRangeSpec {
+            is_suffix_length: true,
+            start: suffix_len,
+            end: -1,
+        };
+
+        let read = read_compressed_multipart(&fixture, Some(rs), &ObjectOptions::default()).await;
+
+        let expected = &fixture.plaintext[fixture.plaintext.len() - suffix_len as usize..];
+        assert_eq!(read, expected, "suffix range must return the tail of the last part");
+    }
+
+    /// Builds an SSE-C + disk-compression multipart object exactly like the
+    /// write path: each part is compressed into its own stream and then
+    /// encrypted with the per-part key schedule. The fixture is
+    /// legacy-encryption-specific (`rustfs_rio::EncryptReader`), matching the
+    /// pre-existing `build_legacy_ssec_multipart_fixture` shape, while the
+    /// compression layer follows the active backend feature.
+    async fn compressed_encrypted_multipart_fixture(key_bytes: [u8; 32], part_sizes: &[usize]) -> CompressedMultipartFixture {
+        let pattern = b"compressed encrypted multipart fixture data ";
+        let mut plaintext = Vec::new();
+        let mut stored = Vec::new();
+        let mut parts = Vec::with_capacity(part_sizes.len());
+
+        for (i, part_size) in part_sizes.iter().enumerate() {
+            let part_number = i + 1;
+            let mut part_plaintext = Vec::with_capacity(*part_size);
+            while part_plaintext.len() < *part_size {
+                part_plaintext.extend_from_slice(pattern);
+                part_plaintext.push(part_number as u8);
+            }
+            part_plaintext.truncate(*part_size);
+
+            let (compressed, index) = compressed_part_fixture(&part_plaintext).await;
+            let mut part_cipher = Vec::new();
+            rustfs_rio::EncryptReader::new_multipart(Cursor::new(compressed), key_bytes, LEGACY_FIXTURE_BASE_NONCE, part_number)
+                .read_to_end(&mut part_cipher)
+                .await
+                .expect("encrypt compressed fixture part");
+
+            parts.push(ObjectPartInfo {
+                number: part_number,
+                size: part_cipher.len(),
+                actual_size: *part_size as i64,
+                index,
+                ..Default::default()
+            });
+            stored.extend_from_slice(&part_cipher);
+            plaintext.extend_from_slice(&part_plaintext);
+        }
+
+        let mut user_defined = legacy_ssec_multipart_metadata(key_bytes, plaintext.len());
+        rustfs_utils::http::insert_str(
+            &mut user_defined,
+            rustfs_utils::http::SUFFIX_COMPRESSION,
+            crate::io_support::rio::compression_metadata_value(CompressionAlgorithm::default()),
+        );
+        rustfs_utils::http::insert_str(&mut user_defined, rustfs_utils::http::SUFFIX_ACTUAL_SIZE, plaintext.len().to_string());
+
+        let object_info = ObjectInfo {
+            bucket: "test-bucket".to_string(),
+            name: "compressed-encrypted-multipart".to_string(),
+            size: stored.len() as i64,
+            etag: Some(format!("6bcf86bed8807b8e78f0fc6e0a53079d-{}", part_sizes.len())),
+            parts: Arc::new(parts),
+            user_defined: Arc::new(user_defined),
+            ..Default::default()
+        };
+
+        CompressedMultipartFixture {
+            object_info,
+            stored,
+            plaintext,
+        }
+    }
+
+    async fn read_compressed_encrypted_multipart(
+        fixture: &CompressedMultipartFixture,
+        key_bytes: [u8; 32],
+        rs: Option<HTTPRangeSpec>,
+        opts: &ObjectOptions,
+    ) -> Vec<u8> {
+        let headers = ssec_headers_from_key(key_bytes);
+        let (_, offset, length) =
+            GetObjectReader::new(Box::new(Cursor::new(Vec::new())), rs.clone(), &fixture.object_info, opts, &headers)
+                .await
+                .expect("plan compressed encrypted multipart read");
+
+        let end = offset + usize::try_from(length).expect("storage window length must be non-negative");
+        assert!(
+            end <= fixture.stored.len(),
+            "planned storage window {offset}..{end} exceeds stored stream of {} bytes",
+            fixture.stored.len()
+        );
+        let window = fixture.stored[offset..end].to_vec();
+
+        let (mut reader, replay_offset, replay_length) =
+            GetObjectReader::new(Box::new(Cursor::new(window)), rs, &fixture.object_info, opts, &headers)
+                .await
+                .expect("build compressed encrypted multipart reader");
+        assert_eq!((replay_offset, replay_length), (offset, length), "read plan must be deterministic");
+
+        reader.read_all().await.expect("read compressed encrypted multipart stream")
+    }
+
+    #[tokio::test]
+    async fn compressed_encrypted_multipart_full_get_roundtrip() {
+        let key_bytes = [0x6Eu8; 32];
+        let fixture = compressed_encrypted_multipart_fixture(key_bytes, &[3 * 1024 * 1024, 1024 * 1024]).await;
+
+        let read = read_compressed_encrypted_multipart(&fixture, key_bytes, None, &ObjectOptions::default()).await;
+
+        assert_eq!(read.len(), fixture.plaintext.len(), "full GET must return the logical size");
+        assert_eq!(read, fixture.plaintext, "SSE-C + compression full GET must reassemble all parts");
+    }
+
+    #[tokio::test]
+    async fn compressed_encrypted_multipart_range_crosses_part_boundary() {
+        let key_bytes = [0x6Eu8; 32];
+        let fixture = compressed_encrypted_multipart_fixture(key_bytes, &[3 * 1024 * 1024, 1024 * 1024]).await;
+        let boundary = 3 * 1024 * 1024_i64;
+        let rs = HTTPRangeSpec {
+            is_suffix_length: false,
+            start: boundary - 65_536,
+            end: boundary + 65_536 - 1,
+        };
+
+        let read = read_compressed_encrypted_multipart(&fixture, key_bytes, Some(rs), &ObjectOptions::default()).await;
+
+        let expected = &fixture.plaintext[(boundary - 65_536) as usize..(boundary + 65_536) as usize];
+        assert_eq!(read, expected, "SSE-C + compression boundary-crossing range must splice both parts");
+    }
+
+    #[tokio::test]
+    async fn compressed_encrypted_multipart_part_number_get_returns_single_part() {
+        let key_bytes = [0x6Eu8; 32];
+        let part_sizes = [3 * 1024 * 1024, 1024 * 1024];
+        let fixture = compressed_encrypted_multipart_fixture(key_bytes, &part_sizes).await;
+
+        let opts = ObjectOptions {
+            part_number: Some(2),
+            ..Default::default()
+        };
+        let read = read_compressed_encrypted_multipart(&fixture, key_bytes, None, &opts).await;
+
+        let expected = &fixture.plaintext[part_sizes[0]..];
+        assert_eq!(read.len(), part_sizes[1], "partNumber=2 GET must return the part's logical size");
+        assert_eq!(read, expected, "partNumber=2 GET must return the original part bytes");
+    }
+
    #[tokio::test]
    async fn test_get_object_reader_rejects_ssec_read_without_headers() {
        let object_info = ObjectInfo {
@@ -277,6 +277,12 @@ pub struct ObjectOptions {
    /// fence avoids recursively acquiring the read lock behind a queued writer.
    pub bucket_lifecycle_lock_fence: Option<NamespaceLockFence>,
    pub replication_request: bool,
+    /// Source-cluster LWW timestamps carried by an authorized replication
+    /// request; None when the source never modified the category. Only the
+    /// replication-authorized options builders may set these.
+    pub replication_tagging_timestamp: Option<OffsetDateTime>,
+    pub replication_retention_timestamp: Option<OffsetDateTime>,
+    pub replication_legalhold_timestamp: Option<OffsetDateTime>,
    /// Authorized SSE-C replication passthrough: the body is already
    /// ciphertext, so the write path must not encrypt or compress it and
    /// stores the restored encryption metadata verbatim. Only the
@@ -23,6 +23,10 @@ use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 use tokio::task::JoinSet;

+#[allow(
+    dead_code,
+    reason = "default operation label for the test-only AsyncBatchProcessor::new (backlog#1823)"
+)]
 const BATCH_PROCESSOR_OPERATION_CUSTOM: &str = "custom";
 const BATCH_PROCESSOR_OPERATION_READ: &str = "read";
 const BATCH_PROCESSOR_OPERATION_WRITE: &str = "write";
@@ -211,6 +215,7 @@ pub struct AsyncBatchProcessor {
 }

 impl AsyncBatchProcessor {
+    #[allow(dead_code, reason = "constructor used only by this file's tests (backlog#1823)")]
    pub fn new(max_concurrent: usize) -> Self {
        Self::new_with_operation(max_concurrent, BATCH_PROCESSOR_OPERATION_CUSTOM)
    }
@@ -26,11 +26,26 @@ use std::sync::atomic::Ordering;
 use tokio::sync::RwLock;
 use tracing::warn;

+/// Dead ecstore-side notification skeleton.
+///
+/// The working notification stack is `rustfs-notify`, whose own `EventNotifier`
+/// is the one bucket configuration actually drives. Nothing calls the methods
+/// below; `init_bucket_targets` even logs that it is a no-op in this build.
+/// Removing it means also retiring the `InstanceContext` slot that holds it
+/// (backlog#939 Phase 5), so it is left explicit here rather than half-removed.
+#[allow(
+    dead_code,
+    reason = "ecstore-side notification skeleton superseded by rustfs-notify; see module note (backlog#1823)"
+)]
 pub struct EventNotifier {
    target_list: TargetList,
    //bucket_rules_map: HashMap<String , HashMap<EventName, Rules>>,
 }

+#[allow(
+    dead_code,
+    reason = "ecstore-side notification skeleton superseded by rustfs-notify; see module note (backlog#1823)"
+)]
 impl EventNotifier {
    pub fn new() -> Arc<RwLock<Self>> {
        Arc::new(RwLock::new(Self {
@@ -13,7 +13,6 @@
 // limitations under the License.

 // #730: background service owners still contain staged notification/rebalance/tier paths.
-#![allow(dead_code)]

 pub(crate) mod batch_processor;
 pub(crate) mod event_notification;
@@ -1623,6 +1623,7 @@ impl NotificationSys {
        workers.peers.remove(host);
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    fn tier_config_reload_worker_active(&self, host: &str) -> bool {
        self.tier_config_reload_workers
            .lock()
@@ -1796,6 +1797,7 @@ where
        .map_err(|_| Error::other(format!("scanner activity peer {host} timed out after {timeout_duration:?}")))?
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 async fn call_peer_with_timeout<F, Fut>(
    timeout_dur: Duration,
    host_label: &str,
@@ -864,6 +864,10 @@ pub(super) fn merge_rebalance_meta(remote: &mut RebalanceMeta, local: &Rebalance
    RebalanceMetaMergeOutcome::Merged
 }

+#[allow(
+    dead_code,
+    reason = "stop-transition helper retained beside stop_rebalance_meta_snapshot; no caller yet (backlog#1823)"
+)]
 pub(super) fn mark_started_rebalance_pools_stopped(meta: &mut RebalanceMeta, stop_time: OffsetDateTime) {
    for pool_stat in meta.pool_stats.iter_mut() {
        if pool_stat.info.status == RebalStatus::Started {
@@ -964,6 +968,7 @@ pub(super) fn rollback_rebalance_start_meta_snapshot_for_id(
    })
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(super) fn stop_rebalance_meta_snapshot(meta: Option<&mut RebalanceMeta>, now: OffsetDateTime) -> Option<RebalanceMeta> {
    let meta = meta?;
    stop_rebalance_state(meta, now);
@@ -171,6 +171,7 @@ where
 }

 #[allow(clippy::too_many_arguments)]
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(super) async fn migrate_entry_version_with_retry_wait<Backend, F, Fut, D, DFut, W, WFut>(
    set: &Backend,
    bucket: String,
@@ -1,5 +1,4 @@
 use serde::{Deserialize, Serialize};
-use std::sync::Arc;
 use time::OffsetDateTime;
 use tokio_util::sync::CancellationToken;

@@ -32,8 +31,6 @@ pub struct RebalanceStats {
    pub cleanup_warnings: RebalanceCleanupWarnings,
 }

-pub type RStats = Vec<Arc<RebalanceStats>>;
-
 #[derive(Debug, Default)]
 pub(super) struct RebalanceBucketConfigs {
    pub(super) bucket_incarnation_id: Option<uuid::Uuid>,
@@ -30,6 +30,5 @@ pub mod warm_backend_minio;
 pub mod warm_backend_r2;
 pub mod warm_backend_rustfs;
 pub mod warm_backend_s3;
-pub mod warm_backend_s3sdk;
 pub mod warm_backend_tencent;
 pub mod warm_backend_wasabi;
@@ -488,6 +488,7 @@ impl TierCandidateMutation {
        targets
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    fn affected_targets(
        &self,
        manager: &TierConfigMgr,
@@ -802,6 +803,7 @@ fn tier_persisted_reference_blocks_any_target(
        .any(|target| tier_persisted_reference_blocks_target(tier_name, backend_identity, target))
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn tier_object_blocks_target_rebind(object: &ObjectInfo, target: &TierMutationIntentTarget) -> io::Result<bool> {
    tier_object_blocks_any_target_rebind(object, std::slice::from_ref(target))
 }
@@ -2726,14 +2728,6 @@ impl TierConfigMgr {
        Self::publish_candidate_owned(handle, candidate, driver_tier.map(str::to_string), update).await
    }

-    fn begin_publish_transition(
-        handle: &Arc<RwLock<Self>>,
-        manager: &mut Self,
-        candidate: &Self,
-    ) -> std::result::Result<TierPublishTransition, AdminError> {
-        Self::begin_publish_transition_with_allowed_mutation_blocks(handle, manager, candidate, None)
-    }
-
    fn begin_publish_transition_with_allowed_mutation_blocks(
        handle: &Arc<RwLock<Self>>,
        manager: &mut Self,
@@ -2819,14 +2813,6 @@ impl TierConfigMgr {
        })
    }

-    async fn publish_candidate_inner(
-        handle: &Arc<RwLock<Self>>,
-        candidate: Self,
-        driver_tier: Option<&str>,
-    ) -> std::result::Result<(), AdminError> {
-        Self::publish_candidate_inner_with_allowed_mutation_blocks(handle, candidate, driver_tier, None).await
-    }
-
    async fn publish_candidate_inner_with_allowed_mutation_blocks(
        handle: &Arc<RwLock<Self>>,
        candidate: Self,
@@ -2939,6 +2925,7 @@ impl TierConfigMgr {
        admin_err
    }

+    #[allow(dead_code, reason = "reached only through #[cfg(test)] helpers in this file (backlog#1823)")]
    async fn publish_candidate_owned(
        handle: &Arc<RwLock<Self>>,
        candidate: Self,
@@ -3541,6 +3528,7 @@ impl TierConfigMgr {
        Self::update_candidate_with_config_lock(handle, api, TierCandidateMutation::Remove(tier_name.to_string(), force)).await
    }

+    #[allow(dead_code, reason = "reached only through #[cfg(test)] helpers in this file (backlog#1823)")]
    async fn remove_and_save_with<S>(
        handle: &Arc<RwLock<Self>>,
        api: Arc<S>,
@@ -3574,6 +3562,7 @@ impl TierConfigMgr {
        Self::update_candidate_with_config_lock(handle, api, TierCandidateMutation::Clear(force)).await
    }

+    #[allow(dead_code, reason = "reached only through #[cfg(test)] helpers in this file (backlog#1823)")]
    async fn clear_and_save_with<S>(
        handle: &Arc<RwLock<Self>>,
        api: Arc<S>,
@@ -3612,6 +3601,10 @@ impl TierConfigMgr {
    }

    #[cfg(test)]
+    #[allow(
+        dead_code,
+        reason = "lease accounting asserted by a bucket_lifecycle_ops test behind `--features test-util` (backlog#1823)"
+    )]
    pub(crate) async fn active_operation_lease_count(handle: &Arc<RwLock<Self>>, tier_name: &str) -> usize {
        let manager = handle.read().await;
        let Some(runtime) = registered_tier_driver_runtime(&manager) else {
@@ -3717,10 +3710,6 @@ impl TierConfigMgr {
        Ok(())
    }

-    fn retire_driver(&mut self, tier_name: &str) {
-        self.revoke_driver(tier_name);
-    }
-
    fn revoke_all_drivers(&mut self) {
        if let Some(runtime) = registered_tier_driver_runtime(self) {
            let mut runtime = lock_unpoisoned(&runtime);
@@ -3884,6 +3873,7 @@ impl TierConfigMgr {
        self.save_config(api, &config_file, data).await
    }

+    #[allow(dead_code, reason = "reached only through #[cfg(test)] helpers in this file (backlog#1823)")]
    async fn save_tiering_config_if_current<S>(
        &self,
        api: Arc<S>,
@@ -305,6 +305,10 @@ impl TierMutationIntent {
    }
 }

+#[allow(
+    dead_code,
+    reason = "intent-record persistence asserted by store::init tests (backlog#1823)"
+)]
 pub(crate) fn tier_mutation_intent_record_object_name(mutation_id: Uuid) -> Result<String> {
    tier_mutation_intent_record_object_name_with_prefix(TIER_MUTATION_INTENT_RECORD_PREFIX, mutation_id)
 }
@@ -317,6 +321,10 @@ fn tier_mutation_intent_record_object_name_with_prefix(prefix: &str, mutation_id
    Ok(format!("{}/{}/{}/{}.json", prefix, &mutation_key[..2], &mutation_key[2..4], mutation_key))
 }

+#[allow(
+    dead_code,
+    reason = "intent-record persistence asserted by store::init tests (backlog#1823)"
+)]
 pub(crate) fn tier_mutation_intent_id_from_record_object_name(object: &str) -> Result<Uuid> {
    tier_mutation_intent_id_from_record_object_name_with_prefix(TIER_MUTATION_INTENT_RECORD_PREFIX, object)
 }
@@ -355,6 +363,10 @@ fn tier_mutation_intent_id_from_record_object_name_with_prefix(prefix: &str, obj
    Uuid::parse_str(mutation_key).map_err(|_| TierMutationIntentError::Corrupt("intent record path has invalid uuid"))
 }

+#[allow(
+    dead_code,
+    reason = "intent-record persistence asserted by store::init tests (backlog#1823)"
+)]
 pub(crate) async fn save_tier_mutation_intent_record<S>(api: Arc<S>, intent: &TierMutationIntent) -> EcstoreResult<()>
 where
    S: EcstoreObjectIO,
@@ -446,6 +458,10 @@ where
    Ok((intent, etag))
 }

+#[allow(
+    dead_code,
+    reason = "intent-record persistence asserted by store::init tests (backlog#1823)"
+)]
 pub(crate) async fn save_tier_mutation_intent_record_if_current<S>(
    api: Arc<S>,
    intent: &TierMutationIntent,
@@ -41,10 +41,7 @@ use crate::services::tier::{
 };
 use tracing::warn;

-const MAX_MULTIPART_PUT_OBJECT_SIZE: i64 = 1024 * 1024 * 1024 * 1024 * 5;
-const MAX_PARTS_COUNT: i64 = 10000;
 const _MAX_PART_SIZE: i64 = 1024 * 1024 * 1024 * 5;
-const MIN_PART_SIZE: i64 = 1024 * 1024 * 128;

 fn parse_generation(remote_version: &str) -> Result<Option<i64>, Error> {
    if remote_version.is_empty() {
@@ -64,7 +61,6 @@ pub struct WarmBackendGCS {
    pub control: Arc<StorageControl>,
    pub bucket: String,
    pub prefix: String,
-    pub storage_class: String,
 }

 impl WarmBackendGCS {
@@ -104,7 +100,6 @@ impl WarmBackendGCS {
            control,
            bucket: conf.bucket.clone(),
            prefix: conf.prefix.strip_suffix("/").unwrap_or(&conf.prefix).to_owned(),
-            storage_class: "".to_string(),
        })
    }

@@ -33,8 +33,6 @@ use crate::client::{
    transition_api::{BucketLookupType, Options, TransitionClient, TransitionCore},
    transition_api::{ReadCloser, ReaderImpl},
 };
-use crate::error::ErrorResponse;
-use crate::error::error_resp_to_object_err;
 use crate::services::tier::{
    tier_config::TierS3,
    warm_backend::{
@@ -1,200 +0,0 @@
-// 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.
-#![allow(unused_imports)]
-#![allow(unused_variables)]
-#![allow(unused_mut)]
-#![allow(unused_assignments)]
-#![allow(unused_must_use)]
-#![allow(clippy::all)]
-
-use std::collections::HashMap;
-use std::sync::Arc;
-use url::Url;
-
-use aws_config::meta::region::RegionProviderChain;
-use aws_sdk_s3::Client;
-use aws_sdk_s3::config::{Credentials, Region};
-use aws_sdk_s3::primitives::ByteStream;
-
-use crate::client::{
-    api_get_options::GetObjectOptions,
-    api_put_object::PutObjectOptions,
-    api_remove::RemoveObjectOptions,
-    transition_api::{ReadCloser, ReaderImpl},
-};
-use crate::error::ErrorResponse;
-use crate::error::error_resp_to_object_err;
-use crate::services::tier::{
-    tier_config::TierS3,
-    warm_backend::{WarmBackend, WarmBackendGetOpts},
-};
-
-pub struct WarmBackendS3 {
-    pub client: Arc<Client>,
-    pub bucket: String,
-    pub prefix: String,
-    pub storage_class: String,
-}
-
-impl WarmBackendS3 {
-    pub async fn new(conf: &TierS3, tier: &str) -> Result<Self, std::io::Error> {
-        let u = match Url::parse(&conf.endpoint) {
-            Ok(u) => u,
-            Err(err) => {
-                return Err(std::io::Error::other(err.to_string()));
-            }
-        };
-
-        if conf.aws_role_web_identity_token_file == "" && conf.aws_role_arn != ""
-            || conf.aws_role_web_identity_token_file != "" && conf.aws_role_arn == ""
-        {
-            return Err(std::io::Error::other("both the token file and the role ARN are required"));
-        } else if conf.access_key == "" && conf.secret_key != "" || conf.access_key != "" && conf.secret_key == "" {
-            return Err(std::io::Error::other("both the access and secret keys are required"));
-        } else if conf.aws_role
-            && (conf.aws_role_web_identity_token_file != ""
-                || conf.aws_role_arn != ""
-                || conf.access_key != ""
-                || conf.secret_key != "")
-        {
-            return Err(std::io::Error::other(
-                "AWS Role cannot be activated with static credentials or the web identity token file",
-            ));
-        } else if conf.bucket == "" {
-            return Err(std::io::Error::other("no bucket name was provided"));
-        }
-
-        let creds;
-        if conf.access_key != "" && conf.secret_key != "" {
-            creds = Credentials::new(
-                conf.access_key.clone(), // access_key_id
-                conf.secret_key.clone(), // secret_access_key
-                None,                    // session_token (optional)
-                None,
-                "Static",
-            );
-        } else {
-            return Err(std::io::Error::other("insufficient parameters for S3 backend authentication"));
-        }
-        let region_provider = RegionProviderChain::default_provider().or_else(Region::new(conf.region.clone()));
-        #[allow(deprecated)]
-        let config = aws_config::from_env()
-            .endpoint_url(conf.endpoint.clone())
-            .region(region_provider)
-            .credentials_provider(creds)
-            .load()
-            .await;
-        let client = Client::new(&config);
-        let client = Arc::new(client);
-        Ok(Self {
-            client,
-            bucket: conf.bucket.clone(),
-            prefix: conf.prefix.clone().trim_matches('/').to_string(),
-            storage_class: conf.storage_class.clone(),
-        })
-    }
-
-    pub fn get_dest(&self, object: &str) -> String {
-        let mut dest_obj = object.to_string();
-        if self.prefix != "" {
-            dest_obj = format!("{}/{}", &self.prefix, object);
-        }
-        return dest_obj;
-    }
-}
-
-#[async_trait::async_trait]
-impl WarmBackend for WarmBackendS3 {
-    async fn put_with_meta(
-        &self,
-        object: &str,
-        r: ReaderImpl,
-        length: i64,
-        meta: HashMap<String, String>,
-    ) -> Result<String, std::io::Error> {
-        let client = self.client.clone();
-        let Ok(res) = client
-            .put_object()
-            .bucket(&self.bucket)
-            .key(&self.get_dest(object))
-            .body(match r {
-                ReaderImpl::Body(content_body) => ByteStream::from(content_body.to_vec()),
-                ReaderImpl::ObjectBody(mut content_body) => ByteStream::from(content_body.read_all().await?),
-            })
-            .send()
-            .await
-        else {
-            return Err(std::io::Error::other("put_object error"));
-        };
-
-        Ok(res.version_id().unwrap_or("").to_string())
-    }
-
-    async fn put(&self, object: &str, r: ReaderImpl, length: i64) -> Result<String, std::io::Error> {
-        self.put_with_meta(object, r, length, HashMap::new()).await
-    }
-
-    async fn get(&self, object: &str, rv: &str, opts: WarmBackendGetOpts) -> Result<ReadCloser, std::io::Error> {
-        let client = self.client.clone();
-        let mut req = client.get_object().bucket(&self.bucket).key(&self.get_dest(object));
-
-        if !rv.is_empty() {
-            req = req.version_id(rv);
-        }
-
-        if opts.start_offset >= 0 && opts.length > 0 {
-            let end = opts
-                .start_offset
-                .checked_add(opts.length)
-                .and_then(|v| v.checked_sub(1))
-                .ok_or_else(|| std::io::Error::other("invalid range: overflow"))?;
-            req = req.range(format!("bytes={}-{}", opts.start_offset, end));
-        }
-
-        let res = req.send().await.map_err(|e| std::io::Error::other(e.to_string()))?;
-
-        Ok(ReadCloser::new(std::io::Cursor::new(
-            res.body.collect().await.map(|data| data.into_bytes().to_vec())?,
-        )))
-    }
-
-    async fn remove(&self, object: &str, rv: &str) -> Result<(), std::io::Error> {
-        let client = self.client.clone();
-        let mut req = client.delete_object().bucket(&self.bucket).key(&self.get_dest(object));
-
-        if !rv.is_empty() {
-            req = req.version_id(rv);
-        }
-
-        req.send().await.map_err(|e| std::io::Error::other(e.to_string()))?;
-
-        Ok(())
-    }
-
-    async fn in_use(&self) -> Result<bool, std::io::Error> {
-        let client = self.client.clone();
-        let Ok(res) = client
-            .list_objects_v2()
-            .bucket(&self.bucket)
-            //.max_keys(10)
-            //.into_paginator()
-            .send()
-            .await
-        else {
-            return Err(std::io::Error::other("list_objects_v2 error"));
-        };
-
-        Ok(res.common_prefixes.unwrap_or_default().len() > 0 || res.contents.unwrap_or_default().len() > 0)
-    }
-}
@@ -32,15 +32,22 @@ use crate::diagnostics::get::{
    GET_METADATA_CACHE_REASON_NOT_READ_DATA, GET_METADATA_CACHE_REASON_PART_NUMBER,
    GET_METADATA_CACHE_REASON_RAW_DATA_MOVEMENT_READ, GET_METADATA_CACHE_REASON_USABLE, GET_METADATA_CACHE_REASON_VERSION_ID,
    GET_METADATA_CACHE_REASON_VERSION_SUSPENDED, GET_METADATA_CACHE_REASON_VERSIONED,
-    GET_METADATA_EARLY_STOP_REASON_CONFLICTING_METADATA, GET_METADATA_EARLY_STOP_REASON_DELETE_MARKER,
-    GET_METADATA_EARLY_STOP_REASON_ERROR, GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM,
-    GET_METADATA_EARLY_STOP_REASON_NOT_FOUND, GET_METADATA_EARLY_STOP_REASON_UNSAFE_REQUEST,
-    GET_METADATA_EARLY_STOP_REASON_VALID_QUORUM, GET_METADATA_EARLY_STOP_REASON_VERSION_MATCH_QUORUM,
-    GET_METADATA_EARLY_STOP_REASON_VERSION_NOT_FOUND, GET_METADATA_RESPONSE_CORRUPT, GET_METADATA_RESPONSE_DISK_NOT_FOUND,
-    GET_METADATA_RESPONSE_ERROR, GET_METADATA_RESPONSE_IGNORED, GET_METADATA_RESPONSE_NOT_FOUND, GET_METADATA_RESPONSE_TIMEOUT,
-    GET_METADATA_RESPONSE_VALID, GET_METADATA_RESPONSE_VERSION_NOT_FOUND, GET_OBJECT_PATH_CODEC_STREAMING,
-    GET_OBJECT_PATH_DIRECT_MEMORY, GET_OBJECT_PATH_INTERNAL_META, GET_OBJECT_PATH_LEGACY_DUPLEX, GET_OBJECT_PATH_SET_DISK,
-    GET_STAGE_DECODE, GET_STAGE_METADATA_CACHE_LOOKUP, GET_STAGE_METADATA_RESOLVE, GET_STAGE_RANGE, GET_STAGE_READER_SETUP,
+    GET_METADATA_EARLY_STOP_REASON_CONFLICTING_METADATA, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_DELETED, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_NOT_INLINE,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_REMOTE,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_TRANSFORMED,
+    GET_METADATA_EARLY_STOP_REASON_DELETE_MARKER, GET_METADATA_EARLY_STOP_REASON_ERROR,
+    GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM, GET_METADATA_EARLY_STOP_REASON_NOT_FOUND,
+    GET_METADATA_EARLY_STOP_REASON_UNSAFE_REQUEST, GET_METADATA_EARLY_STOP_REASON_VALID_QUORUM,
+    GET_METADATA_EARLY_STOP_REASON_VERSION_MATCH_QUORUM, GET_METADATA_EARLY_STOP_REASON_VERSION_NOT_FOUND,
+    GET_METADATA_RESPONSE_CORRUPT, GET_METADATA_RESPONSE_DISK_NOT_FOUND, GET_METADATA_RESPONSE_ERROR,
+    GET_METADATA_RESPONSE_IGNORED, GET_METADATA_RESPONSE_NOT_FOUND, GET_METADATA_RESPONSE_TIMEOUT, GET_METADATA_RESPONSE_VALID,
+    GET_METADATA_RESPONSE_VERSION_NOT_FOUND, GET_OBJECT_PATH_CODEC_STREAMING, GET_OBJECT_PATH_DIRECT_MEMORY,
+    GET_OBJECT_PATH_INTERNAL_META, GET_OBJECT_PATH_LEGACY_DUPLEX, GET_OBJECT_PATH_SET_DISK, GET_STAGE_DECODE,
+    GET_STAGE_METADATA_CACHE_LOOKUP, GET_STAGE_METADATA_RESOLVE, GET_STAGE_RANGE, GET_STAGE_READER_SETUP,
    GET_STAGE_READER_SETUP_DROP_PENDING, GET_STAGE_READER_SETUP_SCHEDULE, GET_STAGE_READER_SETUP_WAIT_QUORUM,
    GET_STAGE_READER_TASK_BITROT_READER_INIT, GET_STAGE_READER_TASK_FILE_OPEN, GET_STAGE_READER_TASK_READER_CONSTRUCTION,
    GetObjectFailureReason, classify_disk_error, get_stage_timer_if_enabled, record_get_object_pipeline_failure,
@@ -173,11 +180,13 @@ pub(in crate::set_disk) enum GetCodecStreamingReaderBuildOutcome {
    Fallback(GetCodecStreamingFallbackReason),
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(in crate::set_disk) struct MultipartCodecStreamingReader {
    pub(in crate::set_disk) readers: VecDeque<Box<dyn AsyncRead + Unpin + Send + Sync>>,
 }

 impl MultipartCodecStreamingReader {
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) fn new(readers: Vec<Box<dyn AsyncRead + Unpin + Send + Sync>>) -> Self {
        Self {
            readers: VecDeque::from(readers),
@@ -652,36 +661,49 @@ pub(in crate::set_disk) fn metadata_early_stop_candidate_matches(left: &FileInfo
        && left.erasure.distribution == right.erasure.distribution
 }

-pub(in crate::set_disk) async fn data_read_early_stop_inline_body_verified(
+pub(in crate::set_disk) async fn data_read_early_stop_inline_body_miss_reason(
    bucket: &str,
    object: &str,
    candidate: &FileInfo,
    parts_metadata: &[FileInfo],
    disks: &[Option<DiskStore>],
-) -> bool {
-    if !candidate.inline_data()
-        || candidate.is_compressed()
+) -> Option<&'static str> {
+    // `inline_data` excludes remote objects; this diagnostic reports them separately.
+    if !rustfs_utils::http::contains_key_str(&candidate.metadata, rustfs_utils::http::SUFFIX_INLINE_DATA) {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_NOT_INLINE);
+    }
+    if candidate.is_compressed()
        || candidate
            .metadata
            .keys()
            .any(|key| rustfs_utils::http::is_object_encryption_marker(key))
-        || candidate.is_remote()
-        || candidate.deleted
-        || candidate.size <= 0
-        || candidate.parts.len() != 1
-        || !candidate.has_valid_erasure_geometry()
    {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_TRANSFORMED);
+    }
+    if candidate.is_remote() {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_REMOTE);
+    }
+    if candidate.deleted {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_DELETED);
+    }
+    if candidate.size <= 0 {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE);
+    }
+    if candidate.parts.len() != 1 {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE);
+    }
+    if !candidate.has_valid_erasure_geometry() {
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY);
    }

    let Ok(object_size) = usize::try_from(candidate.size) else {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE);
    };
    if candidate.parts.first().is_none_or(|part| part.size != object_size) {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE);
    }
    if !can_try_inline_data_shards_direct(object_size, candidate.erasure.block_size) {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE);
    }

    let Ok(erasure) = coding::Erasure::try_new_with_options(
@@ -690,18 +712,18 @@ pub(in crate::set_disk) async fn data_read_early_stop_inline_body_verified(
        candidate.erasure.block_size,
        candidate.uses_legacy_checksum,
    ) else {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY);
    };
-    let Some(data_files) =
-        collect_inline_data_shard_fileinfos_by_index(parts_metadata, candidate, erasure.data_shards, |index| {
+    let data_files =
+        match collect_inline_data_shard_fileinfos_by_index_or_reason(parts_metadata, candidate, erasure.data_shards, |index| {
            disks.get(index).is_some_and(Option::is_some)
-        })
-    else {
-        return false;
-    };
+        }) {
+            Ok(data_files) => data_files,
+            Err(reason) => return Some(reason),
+        };

    let Some(part) = candidate.parts.first() else {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE);
    };
    let checksum_info = candidate.erasure.get_checksum_info(part.number);
    let checksum_algo = if candidate.uses_legacy_checksum && checksum_info.algorithm == HashAlgorithm::HighwayHash256S {
@@ -721,12 +743,70 @@ pub(in crate::set_disk) async fn data_read_early_stop_inline_body_verified(
    let Ok(mut readers) =
        build_inline_bitrot_readers_from_refs(&data_files, bucket, object, read_length, shard_size, &checksum_algo, false).await
    else {
-        return false;
+        return Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY);
    };

-    try_read_inline_data_shards_direct(&mut readers, erasure.data_shards, read_length, object_size)
-        .await
-        .is_some_and(|body| body.len() == object_size)
+    match try_read_inline_data_shards_direct(&mut readers, erasure.data_shards, read_length, object_size).await {
+        Some(body) if body.len() == object_size => None,
+        _ => Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY),
+    }
+}
+
+fn data_read_inline_missing_shards_are_pending(
+    candidate: &FileInfo,
+    parts_metadata: &[FileInfo],
+    errors: &[Option<DiskError>],
+    disks: &[Option<DiskStore>],
+    fanout_order: &[usize],
+    scheduled_fanout_len: usize,
+) -> bool {
+    let Ok(erasure) = coding::Erasure::try_new_with_options(
+        candidate.erasure.data_blocks,
+        candidate.erasure.parity_blocks,
+        candidate.erasure.block_size,
+        candidate.uses_legacy_checksum,
+    ) else {
+        return false;
+    };
+    let distribution = &candidate.erasure.distribution;
+    let mut data_shards_seen_or_pending = vec![false; erasure.data_shards];
+    let mut missing_pending_data_shards = 0usize;
+
+    for (disk_index, file_info) in parts_metadata.iter().enumerate() {
+        let Some(&block_index) = distribution.get(disk_index) else {
+            return false;
+        };
+        if block_index == 0 || block_index > erasure.data_shards {
+            continue;
+        }
+        if !disks.get(disk_index).is_some_and(Option::is_some) {
+            return false;
+        }
+
+        let data_slot = block_index - 1;
+        if file_info.name.is_empty() {
+            let scheduled_and_not_failed = fanout_order
+                .get(..scheduled_fanout_len)
+                .is_some_and(|scheduled_disks| scheduled_disks.contains(&disk_index))
+                && errors.get(disk_index).is_some_and(Option::is_none);
+            if scheduled_and_not_failed {
+                data_shards_seen_or_pending[data_slot] = true;
+                missing_pending_data_shards = missing_pending_data_shards.saturating_add(1);
+                continue;
+            }
+            return false;
+        }
+        if file_info.erasure.index != block_index
+            || !file_info.has_valid_erasure_geometry()
+            || !metadata_early_stop_candidate_matches(file_info, candidate)
+            || file_info.data.as_ref().is_none_or(|data| data.is_empty())
+        {
+            return false;
+        }
+        data_shards_seen_or_pending[data_slot] = true;
+    }
+
+    missing_pending_data_shards > 0 && data_shards_seen_or_pending.into_iter().all(|seen_or_pending| seen_or_pending)
 }

 pub(in crate::set_disk) fn classify_metadata_response_error(err: &DiskError) -> &'static str {
@@ -1758,6 +1838,7 @@ pub(in crate::set_disk) async fn create_bitrot_readers_until_quorum_all_shards(
 }

 #[allow(clippy::too_many_arguments)]
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(in crate::set_disk) async fn create_bitrot_readers_until_quorum(
    files: &[FileInfo],
    disks: &[Option<DiskStore>],
@@ -2048,6 +2129,7 @@ pub(in crate::set_disk) async fn create_data_block_bitrot_readers(
    setup
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(in crate::set_disk) async fn collect_read_multiple_results<F>(
    tasks: Vec<F>,
    read_quorum: usize,
@@ -2469,6 +2551,7 @@ impl SetDisks {
        let mut next_fanout_index = 0usize;
        let mut scheduled_count = 0usize;
        let mut force_full_wait = false;
+        let mut final_miss_reason_override = None;
        let spawn_read_version =
            |join_set: &mut JoinSet<(usize, disk::error::Result<FileInfo>, Duration)>, index: usize, disk: Option<DiskStore>| {
                let task_opts = opts;
@@ -2511,6 +2594,7 @@ impl SetDisks {
        }

        while let Some(result) = join_set.join_next().await {
+            let mut defer_pending_inline_data_shard = false;
            match result {
                Ok((index, res, elapsed)) => match res {
                    Ok(file_info) => {
@@ -2541,17 +2625,43 @@ impl SetDisks {
                    .or_else(|| accumulator.version_early_stop_decision())
            {
                let should_return_early = if read_data {
-                    let allow_data_read_early_stop = match accumulator.candidate.as_ref() {
-                        Some(candidate) => {
-                            data_read_early_stop_inline_body_verified(bucket.as_ref(), object.as_ref(), candidate, &ress, disks)
-                                .await
+                    match accumulator.candidate.as_ref() {
+                        Some(candidate) => match data_read_early_stop_inline_body_miss_reason(
+                            bucket.as_ref(),
+                            object.as_ref(),
+                            candidate,
+                            &ress,
+                            disks,
+                        )
+                        .await
+                        {
+                            None => true,
+                            Some(reason) => {
+                                final_miss_reason_override = Some(reason);
+                                if bounded_fanout
+                                    && reason == GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD
+                                    && data_read_inline_missing_shards_are_pending(
+                                        candidate,
+                                        &ress,
+                                        &errors,
+                                        disks,
+                                        &fanout_order,
+                                        next_fanout_index,
+                                    )
+                                {
+                                    defer_pending_inline_data_shard = true;
+                                } else {
+                                    force_full_wait = true;
+                                }
+                                false
+                            }
+                        },
+                        None => {
+                            force_full_wait = true;
+                            final_miss_reason_override = Some(GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM);
+                            false
                        }
-                        None => false,
-                    };
-                    if !allow_data_read_early_stop {
-                        force_full_wait = true;
                    }
-                    allow_data_read_early_stop
                } else {
                    true
                };
@@ -2588,6 +2698,7 @@ impl SetDisks {
            let pending_responses = join_set.len();
            let should_hedge_single_pending_data_read = read_data
                && !force_full_wait
+                && !defer_pending_inline_data_shard
                && pending_responses == 1
                && accumulator.can_still_reach_early_stop_with_pending(pending_responses);
            if bounded_fanout && force_full_wait {
@@ -2600,6 +2711,7 @@ impl SetDisks {
                    next_fanout_index = next_fanout_index.saturating_add(1);
                }
            } else if bounded_fanout
+                && !defer_pending_inline_data_shard
                && next_fanout_index < disks.len()
                && (!accumulator.can_still_reach_early_stop_with_pending(pending_responses)
                    || should_hedge_single_pending_data_read)
@@ -2613,7 +2725,12 @@ impl SetDisks {
            }
        }

-        rustfs_io_metrics::record_get_object_metadata_early_stop_miss(metrics_path, accumulator.final_miss_reason());
+        let accumulator_miss_reason = accumulator.final_miss_reason();
+        let final_miss_reason = match (final_miss_reason_override, accumulator_miss_reason) {
+            (Some(reason), GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM) => reason,
+            _ => accumulator_miss_reason,
+        };
+        rustfs_io_metrics::record_get_object_metadata_early_stop_miss(metrics_path, final_miss_reason);
        rustfs_io_metrics::record_get_object_metadata_early_stop_saved_responses(metrics_path, 0);
        rustfs_io_metrics::record_get_object_metadata_fanout_lifecycle(metrics_path, scheduled_count, scheduled_count, 0);
        let diagnostics = MetadataFanoutDiagnostics::new(fanout_start.elapsed(), observations);
@@ -2842,6 +2959,7 @@ impl SetDisks {
        (meta_file_infos, errs)
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn read_multiple_files(
        disks: &[Option<DiskStore>],
        req: ReadMultipleReq,
@@ -3021,6 +3139,7 @@ pub(in crate::set_disk) struct RenameDataCommit {
    pub(in crate::set_disk) committed_file_info: FileInfo,
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 type RenameDataLegacyTuple = (
    Vec<Option<DiskStore>>,
    RenameConvergence,
@@ -3030,6 +3149,7 @@ type RenameDataLegacyTuple = (
 );

 impl RenameDataCommit {
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    fn into_legacy_tuple(self) -> RenameDataLegacyTuple {
        (
            self.online_disks,
@@ -3148,6 +3268,7 @@ impl SetDisks {

    #[tracing::instrument(level = "debug", skip(disks, file_infos))]
    #[allow(clippy::type_complexity)]
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn rename_data(
        disks: &[Option<DiskStore>],
        src_bucket: &str,
@@ -4960,6 +5081,7 @@ fn is_cleanup_not_found(e: &DiskError) -> bool {
 /// normalized to `DiskNotFound`: a panic is not a "disk absent" condition and
 /// must not be silently swallowed as an ignorable error (fixes the historical
 /// `Unexpected`/`DiskNotFound` misclassification).
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn map_cleanup_join_result(joined: std::result::Result<Option<DiskError>, tokio::task::JoinError>) -> Option<DiskError> {
    match joined {
        Ok(res) => res,
@@ -5184,6 +5306,7 @@ pub(in crate::set_disk) mod rename_fanout_barrier_phase {
    /// The per-disk old-data-dir cleanup phase of the commit fan-out.
    pub const CLEANUP: &str = "cleanup";
    /// The per-disk `read_version` phase of metadata read fan-out.
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub const READ_VERSION: &str = "read_version";
 }

@@ -5752,9 +5875,20 @@ mod tests {
        object: &str,
        payload: &[u8],
        uses_legacy_checksum: bool,
+    ) -> Vec<FileInfo> {
+        inline_metadata_fanout_fileinfos_with_geometry(bucket, object, payload, uses_legacy_checksum, 2, 2).await
+    }
+
+    async fn inline_metadata_fanout_fileinfos_with_geometry(
+        bucket: &str,
+        object: &str,
+        payload: &[u8],
+        uses_legacy_checksum: bool,
+        data_shards: usize,
+        parity_shards: usize,
    ) -> Vec<FileInfo> {
        let distribution_key = metadata_distribution_key(bucket, object);
-        let mut base = FileInfo::new(&distribution_key, 2, 2);
+        let mut base = FileInfo::new(&distribution_key, data_shards, parity_shards);
        base.volume = bucket.to_string();
        base.name = object.to_string();
        base.size = i64::try_from(payload.len()).expect("test payload should fit i64");
@@ -5817,6 +5951,21 @@ mod tests {
        install_inline_metadata_fanout_files(disks, bucket, object, files).await;
    }

+    async fn install_inline_metadata_fanout_fileinfo_with_geometry(
+        disks: &[Option<DiskStore>],
+        bucket: &str,
+        object: &str,
+        payload: &[u8],
+        data_shards: usize,
+        parity_shards: usize,
+        mutate: impl FnOnce(&mut [FileInfo]),
+    ) {
+        let mut files =
+            inline_metadata_fanout_fileinfos_with_geometry(bucket, object, payload, false, data_shards, parity_shards).await;
+        mutate(&mut files);
+        install_inline_metadata_fanout_files(disks, bucket, object, files).await;
+    }
+
    async fn install_inline_metadata_fanout_files(disks: &[Option<DiskStore>], bucket: &str, object: &str, files: Vec<FileInfo>) {
        let distribution = files
            .first()
@@ -6037,6 +6186,118 @@ mod tests {
        drop(dirs);
    }

+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn bounded_metadata_early_stop_waits_for_pending_inline_data_shard() {
+        const DISKS: usize = 6;
+        const DATA_SHARDS: usize = 4;
+        const PARITY_SHARDS: usize = 2;
+        let bucket = "bounded-inline-data-get-pending-shard-bucket";
+        let object =
+            object_with_initial_data_shards(bucket, "bounded-inline-data-get-pending-shard-object", DATA_SHARDS, DATA_SHARDS);
+        let (dirs, disks) = call_counter_local_disks(bucket, DISKS).await;
+        install_inline_metadata_fanout_fileinfo_with_geometry(
+            &disks,
+            bucket,
+            &object,
+            b"verified inline payload",
+            DATA_SHARDS,
+            PARITY_SHARDS,
+            |_| {},
+        )
+        .await;
+
+        temp_env::async_with_vars(
+            [
+                ("RUSTFS_GET_METADATA_EARLY_STOP_ENABLE", Some("true")),
+                ("RUSTFS_GET_METADATA_DATA_READ_EARLY_STOP_ENABLE", Some("true")),
+                ("RUSTFS_GET_METADATA_EARLY_STOP_BOUNDED_FANOUT", Some("true")),
+            ],
+            async {
+                let fanout_order = bounded_metadata_fanout_order(bucket, &object, DISKS, PARITY_SHARDS);
+                let distribution_key = metadata_distribution_key(bucket, &object);
+                let distribution = FileInfo::new(&distribution_key, DATA_SHARDS, PARITY_SHARDS)
+                    .erasure
+                    .distribution;
+                let paused_data_disk = *fanout_order
+                    .iter()
+                    .take(DATA_SHARDS)
+                    .find(|disk_index| {
+                        distribution
+                            .get(**disk_index)
+                            .is_some_and(|block_index| (1..=DATA_SHARDS).contains(block_index))
+                    })
+                    .expect("initial fanout should include a data shard to pause");
+                let hedged_parity_disk = fanout_order[DATA_SHARDS];
+                let unscheduled_parity_disk = fanout_order[DATA_SHARDS + 1];
+
+                let barrier = rename_fanout_barrier::arm(&object, paused_data_disk, rename_fanout_barrier::PHASE_READ_VERSION);
+                let tracker = rename_fanout_barrier::observe_tasks(&object);
+                let calls = disk_call_counters::observe(&object);
+                let disks_for_read = disks.clone();
+                let object_for_read = object.clone();
+                let mut read = tokio::spawn(async move {
+                    SetDisks::read_all_fileinfo_observed(
+                        &disks_for_read,
+                        bucket,
+                        bucket,
+                        &object_for_read,
+                        "",
+                        true,
+                        false,
+                        false,
+                        true,
+                        PARITY_SHARDS,
+                    )
+                    .await
+                });
+
+                tokio::time::timeout(BARRIER_PAUSE_GUARD, barrier.wait_until_paused())
+                    .await
+                    .expect("initial data shard should pause before returning");
+                tokio::time::timeout(BARRIER_PAUSE_GUARD, async {
+                    while calls.for_disk(disk_call_counters::KIND_READ_VERSION, hedged_parity_disk) == 0 {
+                        tokio::task::yield_now().await;
+                    }
+                })
+                .await
+                .expect("bounded fanout should hedge one parity disk while the data shard is pending");
+
+                assert!(
+                    tokio::time::timeout(BARRIER_PAUSE_GUARD, &mut read).await.is_err(),
+                    "inline data-read early-stop must wait for a scheduled missing data shard instead of forcing full wait"
+                );
+
+                barrier.release();
+                let (parts_metadata, errs, diagnostics) = read
+                    .await
+                    .expect("metadata read task should not panic")
+                    .expect("pending data shard should let the inline verifier finish");
+
+                assert_eq!(
+                    calls.total(disk_call_counters::KIND_READ_VERSION),
+                    5,
+                    "pending data-shard defer should not schedule the final parity disk"
+                );
+                assert_eq!(
+                    calls.for_disk(disk_call_counters::KIND_READ_VERSION, unscheduled_parity_disk),
+                    0,
+                    "the remaining parity disk must stay unissued when pending data verification succeeds"
+                );
+                assert_eq!(
+                    tracker.running(),
+                    0,
+                    "early-stop should drain spawned read_version tasks before returning"
+                );
+                assert_eq!(diagnostics.total_responses(), 5);
+                assert_eq!(parts_metadata.iter().filter(|fi| fi.name == object).count(), 5);
+                assert!(errs.iter().all(Option::is_none));
+            },
+        )
+        .await;
+
+        drop(dirs);
+    }
+
    #[tokio::test]
    async fn data_read_early_stop_verifies_legacy_inline_checksum_payload() {
        let bucket = "legacy-inline-data-get-fanout-bucket";
@@ -6067,11 +6328,133 @@ mod tests {
            .clone();

        assert!(
-            data_read_early_stop_inline_body_verified(bucket, object, &candidate, &parts_metadata, &disks).await,
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &parts_metadata, &disks)
+                .await
+                .is_none(),
            "legacy inline metadata must use the legacy bitrot shard sizing and checksum algorithm"
        );
    }

+    #[tokio::test]
+    async fn data_read_early_stop_reports_inline_miss_reasons() {
+        let bucket = "inline-data-get-miss-reason-bucket";
+        let object = "inline-data-get-miss-reason-object";
+        let payload = b"verified inline payload";
+        let (_dirs, disks) = call_counter_local_disks(bucket, 4).await;
+        let files = inline_metadata_fanout_fileinfos_with_mode(bucket, object, payload, false).await;
+        let distribution = files
+            .first()
+            .map(|file| file.erasure.distribution.clone())
+            .expect("fixture should include metadata");
+        let order = bounded_metadata_fanout_order(bucket, object, 4, 2);
+        let mut parts_metadata = vec![FileInfo::default(); 4];
+        for disk_index in order.into_iter().take(3) {
+            let block_index = distribution
+                .get(disk_index)
+                .copied()
+                .expect("fixture distribution should cover every disk");
+            parts_metadata[disk_index] = files
+                .get(block_index.checked_sub(1).expect("erasure block indexes are one-based"))
+                .expect("fixture should include every distributed shard")
+                .clone();
+        }
+        let candidate = parts_metadata
+            .iter()
+            .find(|file| file.name == object)
+            .expect("fixture should include observed metadata")
+            .clone();
+        let data_disk = distribution
+            .iter()
+            .position(|block_index| *block_index == 1)
+            .expect("fixture distribution should include first data shard");
+
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &parts_metadata, &disks).await,
+            None
+        );
+
+        let mut not_inline = candidate.clone();
+        rustfs_utils::http::remove_str(&mut not_inline.metadata, rustfs_utils::http::SUFFIX_INLINE_DATA);
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &not_inline, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_NOT_INLINE)
+        );
+
+        let mut remote = candidate.clone();
+        remote.transition_status = TRANSITION_COMPLETE.to_string();
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &remote, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_REMOTE)
+        );
+
+        let mut transformed = candidate.clone();
+        rustfs_utils::http::insert_str(&mut transformed.metadata, rustfs_utils::http::SUFFIX_COMPRESSION, "zstd".to_string());
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &transformed, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_TRANSFORMED)
+        );
+
+        let mut deleted = candidate.clone();
+        deleted.deleted = true;
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &deleted, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_DELETED)
+        );
+
+        let mut zero_size = candidate.clone();
+        zero_size.size = 0;
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &zero_size, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_SIZE)
+        );
+
+        let mut multipart = candidate.clone();
+        multipart.parts.push(multipart.parts[0].clone());
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &multipart, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_PART_SHAPE)
+        );
+
+        let mut invalid_geometry = candidate.clone();
+        invalid_geometry.erasure.data_blocks = 0;
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &invalid_geometry, &parts_metadata, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY)
+        );
+
+        let mut missing_shard = parts_metadata.clone();
+        missing_shard[data_disk] = FileInfo::default();
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &missing_shard, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD)
+        );
+
+        let mut missing_payload = parts_metadata.clone();
+        missing_payload[data_disk].data = None;
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &missing_payload, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD)
+        );
+
+        let mut identity_mismatch = parts_metadata.clone();
+        identity_mismatch[data_disk].version_id = Some(Uuid::new_v4());
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &identity_mismatch, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH)
+        );
+
+        let mut corrupt = parts_metadata.clone();
+        if let Some(data) = corrupt[data_disk].data.as_mut() {
+            let mut corrupt_data = data.to_vec();
+            corrupt_data[0] ^= 0x01;
+            *data = Bytes::from(corrupt_data);
+        }
+        assert_eq!(
+            data_read_early_stop_inline_body_miss_reason(bucket, object, &candidate, &corrupt, &disks).await,
+            Some(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY)
+        );
+    }
+
    #[test]
    #[serial_test::serial]
    fn metadata_fanout_lifecycle_records_real_early_stop_abort() {
@@ -6161,7 +6544,7 @@ mod tests {
                &[
                    ("path", GET_OBJECT_PATH_INTERNAL_META),
                    ("decision", "miss"),
-                    ("reason", GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM),
+                    ("reason", GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY),
                ],
            ),
            1,
@@ -6173,7 +6556,7 @@ mod tests {
                &[
                    ("path", GET_OBJECT_PATH_LEGACY_DUPLEX),
                    ("decision", "miss"),
-                    ("reason", GET_METADATA_EARLY_STOP_REASON_INSUFFICIENT_QUORUM),
+                    ("reason", GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_BODY_VERIFY),
                ],
            ),
            0,
@@ -42,12 +42,20 @@ impl<'a> SetDisksCtx<'a> {
    }

    /// The borrowed core, for state not yet fronted by a typed accessor.
+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn core(&self) -> &'a SetDisks {
        self.core
    }

    // --- Immutable topology / config (fixed after construction) ---

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn set_index(&self) -> usize {
        self.core.set_index
    }
@@ -56,14 +64,26 @@ impl<'a> SetDisksCtx<'a> {
        self.core.pool_index
    }

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn set_drive_count(&self) -> usize {
        self.core.set_drive_count
    }

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn default_parity_count(&self) -> usize {
        self.core.default_parity_count
    }

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn set_endpoints(&self) -> &'a [Endpoint] {
        &self.core.set_endpoints
    }
@@ -72,6 +92,10 @@ impl<'a> SetDisksCtx<'a> {
        &self.core.format
    }

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn locker_owner(&self) -> &'a str {
        &self.core.locker_owner
    }
@@ -84,6 +108,10 @@ impl<'a> SetDisksCtx<'a> {

    // --- Locker trio ---

+    #[allow(
+        dead_code,
+        reason = "SetDisks split seam (backlog#815) with no caller in this port (backlog#1823)"
+    )]
    pub(crate) fn lockers(&self) -> &'a [Arc<dyn LockClient>] {
        &self.core.lockers
    }
@@ -39,7 +39,6 @@
 //! - `metadata.rs`, `replication.rs`, `shard_source.rs` — supporting helpers.

 // #730: SetDisks still hosts staged read/heal/write migration helpers.
-#![allow(dead_code)]
 #![allow(unused_imports)]
 #![allow(unused_variables)]

@@ -59,7 +58,10 @@ use crate::client::{object_api_utils::get_raw_etag, transition_api::ReaderImpl};
 use crate::cluster::rpc::heal_bucket_local_on_disks;
 use crate::data_usage::record_compression_total_memory;
 use crate::diagnostics::get::{
-    GET_CODEC_STREAMING_OBJECT_CLASS_PLAIN_SINGLE_PART, GET_OBJECT_PATH_BODY_CACHE, GET_OBJECT_PATH_CODEC_STREAMING,
+    GET_CODEC_STREAMING_OBJECT_CLASS_PLAIN_SINGLE_PART, GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD,
+    GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD, GET_OBJECT_PATH_BODY_CACHE, GET_OBJECT_PATH_CODEC_STREAMING,
    GET_OBJECT_PATH_CODEC_STREAMING_LEGACY_ENGINE, GET_OBJECT_PATH_CODEC_STREAMING_RUSTFS_ENGINE, GET_OBJECT_PATH_DIRECT_MEMORY,
    GET_OBJECT_PATH_EMPTY, GET_OBJECT_PATH_INLINE_DIRECT, GET_OBJECT_PATH_INTERNAL_META, GET_OBJECT_PATH_LEGACY_DUPLEX,
    GET_OBJECT_PATH_REMOTE_TRANSITION, GET_OBJECT_PATH_SET_DISK, GET_STAGE_DECODE, GET_STAGE_EMIT, GET_STAGE_INLINE_PREPARE,
@@ -621,7 +623,9 @@ fn adaptive_duplex_buffer_size(object_size: i64) -> usize {
 // Each flag has a corresponding `*_ROLLOUT_PCT` for percentage-based gradual rollout.
 // ============================================================================

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 const DISK_ONLINE_TIMEOUT: Duration = Duration::from_secs(1);
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 const DISK_HEALTH_CACHE_TTL: Duration = Duration::from_millis(750);
 const GET_OBJECT_METADATA_CACHE_TTL: Duration = Duration::from_secs(2); // Increased from 250ms to 2s
 const DEFAULT_GET_OBJECT_METADATA_CACHE_MAX_ENTRIES: usize = 4096; // Increased from 1024 to 4096
@@ -694,7 +698,15 @@ const ENV_RUSTFS_GET_METADATA_EARLY_STOP_ENABLE: &str = "RUSTFS_GET_METADATA_EAR
 // the env var to `false` to fall back to full-wait metadata fanout.
 const DEFAULT_RUSTFS_GET_METADATA_EARLY_STOP_ENABLE: bool = true;

+#[allow(
+    dead_code,
+    reason = "percentage-rollout facet of the metadata early-stop switch; its predicate has no caller while the sibling enable flag is live (backlog#1823)"
+)]
 const ENV_RUSTFS_GET_METADATA_EARLY_STOP_ROLLOUT_PCT: &str = "RUSTFS_GET_METADATA_EARLY_STOP_ROLLOUT_PCT";
+#[allow(
+    dead_code,
+    reason = "percentage-rollout facet of the metadata early-stop switch; its predicate has no caller while the sibling enable flag is live (backlog#1823)"
+)]
 const DEFAULT_RUSTFS_GET_METADATA_EARLY_STOP_ROLLOUT_PCT: u32 = 100;

 const ENV_RUSTFS_GET_METADATA_VERSION_EARLY_STOP_ENABLE: &str = "RUSTFS_GET_METADATA_VERSION_EARLY_STOP_ENABLE";
@@ -906,6 +918,7 @@ mod prepared_get_object_metadata_tests {
            .expect("test should find an object whose initial fanout covers both data shards")
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    fn bounded_spare_disk_index(bucket: &str, object: &str) -> usize {
        *bounded_metadata_fanout_order(bucket, object, 4, 2)
            .get(3)
@@ -1711,6 +1724,10 @@ fn is_multipart_reader_setup_prefetch_enabled() -> bool {
    }
 }

+#[allow(
+    dead_code,
+    reason = "percentage-rollout facet of the metadata early-stop switch; its predicate has no caller while the sibling enable flag is live (backlog#1823)"
+)]
 fn get_metadata_early_stop_rollout_pct() -> u32 {
    static CACHED: OnceLock<u32> = OnceLock::new();
    *CACHED.get_or_init(|| {
@@ -1750,6 +1767,10 @@ fn should_use_codec_streaming(config: GetCodecStreamingConfig, bucket: &str, obj
 }

 /// Should this specific request use metadata early-stop?
+#[allow(
+    dead_code,
+    reason = "percentage-rollout facet of the metadata early-stop switch; its predicate has no caller while the sibling enable flag is live (backlog#1823)"
+)]
 pub fn should_use_metadata_early_stop(bucket: &str, object: &str) -> bool {
    let base = is_get_metadata_early_stop_enabled();
    let pct = get_metadata_early_stop_rollout_pct();
@@ -2183,6 +2204,7 @@ fn classify_get_codec_streaming_object_class(
    GetCodecStreamingObjectClass::PlainSinglePart
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn is_get_small_object_direct_memory_eligible_with_threshold(
    range: &Option<HTTPRangeSpec>,
    object_info: &ObjectInfo,
@@ -2788,6 +2810,7 @@ pub struct SetDisks {
    /// Stable namespace shared by every object lock created for this set.
    set_lock_namespace: Arc<str>,
    pub format: FormatV3,
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    disk_health_cache: Arc<RwLock<Vec<Option<DiskHealthEntry>>>>,
    get_object_metadata_cache: moka::future::Cache<GetObjectMetadataCacheKey, Arc<GetObjectMetadataCacheEntry>>,
    get_object_metadata_cache_hash_builder: std::collections::hash_map::RandomState,
@@ -3063,11 +3086,13 @@ struct GetObjectMetadataCacheEntry {

 #[derive(Clone, Debug)]
 struct DiskHealthEntry {
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    last_check: Instant,
    online: bool,
 }

 impl DiskHealthEntry {
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    fn cached_value(&self) -> Option<bool> {
        if self.last_check.elapsed() <= DISK_HEALTH_CACHE_TTL {
            Some(self.online)
@@ -3661,6 +3686,7 @@ fn multipart_put_large_batch_min_size_bytes() -> usize {
    })
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn classify_small_write_path(is_inline_buffer: bool, object_size: i64, block_size: usize) -> SmallWritePath {
    if should_use_inline_small_fast_path(is_inline_buffer, object_size, block_size) {
        SmallWritePath::Inline
@@ -3866,8 +3892,17 @@ fn collect_inline_data_shard_fileinfos_by_index<'a>(
    parts_metadata: &'a [FileInfo],
    fi: &FileInfo,
    data_shards: usize,
-    mut disk_is_online: impl FnMut(usize) -> bool,
+    disk_is_online: impl FnMut(usize) -> bool,
 ) -> Option<Vec<&'a FileInfo>> {
+    collect_inline_data_shard_fileinfos_by_index_or_reason(parts_metadata, fi, data_shards, disk_is_online).ok()
+}
+
+fn collect_inline_data_shard_fileinfos_by_index_or_reason<'a>(
+    parts_metadata: &'a [FileInfo],
+    fi: &FileInfo,
+    data_shards: usize,
+    mut disk_is_online: impl FnMut(usize) -> bool,
+) -> std::result::Result<Vec<&'a FileInfo>, &'static str> {
    let distribution = &fi.erasure.distribution;
    let mut data_files = vec![None; data_shards];

@@ -3875,27 +3910,35 @@ fn collect_inline_data_shard_fileinfos_by_index<'a>(
        if !disk_is_online(disk_index) {
            continue;
        }
-        let block_index = *distribution.get(disk_index)?;
+        let Some(&block_index) = distribution.get(disk_index) else {
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY);
+        };
        if block_index == 0 || block_index > data_shards {
            continue;
        }
+        if file_info.name.is_empty() {
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD);
+        }
        if file_info.erasure.index != block_index {
-            continue;
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH);
        }
        if !file_info.has_valid_erasure_geometry() {
-            continue;
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_GEOMETRY);
        }
        if !core::io_primitives::metadata_early_stop_candidate_matches(file_info, fi) {
-            continue;
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_IDENTITY_MISMATCH);
        }
        if file_info.data.as_ref().is_none_or(|data| data.is_empty()) {
-            continue;
+            return Err(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_PAYLOAD);
        }

        data_files[block_index - 1] = Some(file_info);
    }

-    data_files.into_iter().collect()
+    data_files
+        .into_iter()
+        .collect::<Option<Vec<_>>>()
+        .ok_or(GET_METADATA_EARLY_STOP_REASON_DATA_READ_INLINE_MISSING_SHARD)
 }

 impl SetDisks {
@@ -4222,6 +4265,7 @@ fn check_object_lock_retention_update(bucket: &str, object: &str, obj_info: &Obj
 ///
 /// Fail closed: when bucket metadata cannot be resolved the check stays on, so
 /// object-lock protection is never skipped because of a metadata lookup miss.
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub(crate) fn object_lock_delete_check_required(bucket_meta: Option<&crate::bucket::metadata::BucketMetadata>) -> bool {
    bucket_meta.is_none_or(|meta| meta.object_locking())
 }
@@ -4497,15 +4541,6 @@ impl Hash for ObjProps {
    }
 }

-#[derive(Default, Clone, Debug)]
-pub struct HealEntryResult {
-    pub bytes: usize,
-    pub success: bool,
-    pub skipped: bool,
-    pub entry_done: bool,
-    pub name: String,
-}
-
 fn is_object_dangling(
    meta_arr: &[FileInfo],
    errs: &[Option<DiskError>],
@@ -5282,6 +5317,7 @@ pub fn is_valid_storage_class(storage_class: &str) -> bool {
 }

 /// Returns true if the storage class is a cold storage tier that requires special handling
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub fn is_cold_storage_class(storage_class: &str) -> bool {
    matches!(
        storage_class,
@@ -5290,6 +5326,7 @@ pub fn is_cold_storage_class(storage_class: &str) -> bool {
 }

 /// Returns true if the storage class is an infrequent access tier
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 pub fn is_infrequent_access_class(storage_class: &str) -> bool {
    matches!(
        storage_class,
@@ -1716,6 +1716,7 @@ impl SetDisks {
        Ok((result, None))
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    #[tracing::instrument(level = "trace", skip(self), fields(bucket = %bucket, object = %object))]
    pub(in crate::set_disk) async fn heal_object_dir(
        &self,
@@ -66,6 +66,8 @@ impl crate::storage_api_contracts::namespace::NamespaceLocking for SetDisks {
 }

 impl SetDisks {
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) fn format_lock_error(&self, bucket: &str, object: &str, mode: &str, err: &LockResult) -> String {
        match err {
            LockResult::Timeout => {
@@ -79,6 +81,7 @@ impl SetDisks {
        }
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) fn format_lock_error_from_error(
        &self,
        bucket: &str,
@@ -143,6 +146,7 @@ impl SetDisks {
        disks
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn get_online_disks(&self) -> Vec<Option<DiskStore>> {
        let snapshot = self.drive_membership_snapshot().await;
        let mut disks = snapshot.strict_online_candidates().into_iter().map(Some).collect::<Vec<_>>();
@@ -153,6 +157,7 @@ impl SetDisks {
        disks
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn get_online_local_disks(&self) -> Vec<Option<DiskStore>> {
        let snapshot = self.drive_membership_snapshot().await;
        let mut disks = snapshot
@@ -432,6 +437,7 @@ impl SetDisks {
        Ok((disk, fm))
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn get_online_disk_with_healing(
        &self,
        incl_healing: bool,
@@ -440,6 +446,7 @@ impl SetDisks {
        Ok((new_disks, healing > 0))
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(in crate::set_disk) async fn get_online_disk_with_healing_and_info(
        &self,
        incl_healing: bool,
@@ -415,6 +415,7 @@ fn reduce_quorum_part_numbers(object_parts: Vec<Vec<String>>, read_quorum: usize
 /// never returned, but flips `is_truncated` to `true` and yields a
 /// `next_upload_id_marker` pointing at the last returned upload so the caller can
 /// resume paging.
+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn paginate_upload_page(remaining: &[MultipartInfo], max_uploads: usize) -> (Vec<MultipartInfo>, bool, Option<String>) {
    let is_truncated = remaining.len() > max_uploads;
    let page: Vec<MultipartInfo> = remaining.iter().take(max_uploads).cloned().collect();
@@ -557,6 +558,7 @@ impl SetDisks {
    }

    #[tracing::instrument(level = "debug", skip(self))]
+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    pub(super) async fn check_upload_id_exists(
        &self,
        bucket: &str,
@@ -315,6 +315,41 @@ async fn get_object_reader_with_context(
    GetObjectReader::new_with_resolver(reader, range, object_info, opts, headers, ctx.object_encryption_resolver()).await
 }

+async fn get_legacy_object_reader_with_context<R>(
+    ctx: &InstanceContext,
+    reader: R,
+    terminal: tokio::sync::oneshot::Receiver<Result<()>>,
+    range: Option<HTTPRangeSpec>,
+    object_info: &ObjectInfo,
+    opts: &ObjectOptions,
+    headers: &HeaderMap<HeaderValue>,
+) -> Result<(GetObjectReader, usize, i64)>
+where
+    R: AsyncRead + Unpin + Send + Sync + 'static,
+{
+    // ReadPlan validates this size below; failure here only keeps the terminal
+    // guard inside the transform until that validation returns its typed error.
+    let full_plaintext_size = object_info.get_actual_size().ok();
+    let whole_object = opts.part_number.is_none()
+        && match (&range, full_plaintext_size) {
+            (None, _) => true,
+            (Some(range), Some(size)) => range
+                .get_offset_length(size)
+                .is_ok_and(|(offset, length)| offset == 0 && length == size),
+            (Some(_), None) => false,
+        };
+    let (source, terminal): (Box<dyn AsyncRead + Unpin + Send + Sync>, _) = if whole_object {
+        (Box::new(reader), Some(terminal))
+    } else {
+        (Box::new(LegacyDuplexProducerReader::new(reader, terminal)), None)
+    };
+    let (mut reader, offset, length) = get_object_reader_with_context(ctx, source, range, object_info, opts, headers).await?;
+    if let Some(terminal) = terminal {
+        reader.stream = Box::new(LegacyDuplexProducerReader::new(reader.stream, terminal));
+    }
+    Ok((reader, offset, length))
+}
+
 fn data_read_metadata_early_stop_request_shape_allowed(range: &Option<HTTPRangeSpec>, opts: &ObjectOptions) -> bool {
    range.is_none()
        && opts.part_number.is_none()
@@ -899,6 +934,7 @@ impl crate::storage_api_contracts::object::ObjectIO for SetDisks {
                &object_info,
                &opts,
                &self.ctx.tier_config_mgr(),
+                self.ctx.object_encryption_resolver(),
            )
            .await?;
            return Ok(finish_set_disk_read_lock(gr, read_lock_guard.take(), bucket, object));
@@ -1089,8 +1125,9 @@ impl crate::storage_api_contracts::object::ObjectIO for SetDisks {
        let (rd, wd) = tokio::io::duplex(duplex_buffer_size);
        debug!(bucket, object, duplex_buffer_size, "Created duplex pipe for object data transfer");

+        let (producer_terminal_tx, producer_terminal_rx) = tokio::sync::oneshot::channel();
        let (mut reader, offset, length) =
-            get_object_reader_with_context(&self.ctx, Box::new(rd), range, &object_info, opts, &h).await?;
+            get_legacy_object_reader_with_context(&self.ctx, rd, producer_terminal_rx, range, &object_info, opts, &h).await?;
        // Carry the hook probe result so the app layer skips its now-redundant
        // lookup on the streaming miss path (ODC-16).
        reader.body_source = body_source;
@@ -1110,7 +1147,7 @@ impl crate::storage_api_contracts::object::ObjectIO for SetDisks {
            // `get_object_with_fileinfo` also waits on `writer`, so an outer timeout
            // would incorrectly treat downstream backpressure as disk-read latency.
            // Disk read timeouts must be enforced at the actual disk I/O operations.
-            if let Err(e) = Self::get_object_with_fileinfo(
+            let producer_result = Self::get_object_with_fileinfo(
                &bucket,
                &object,
                erasure_cache,
@@ -1128,9 +1165,9 @@ impl crate::storage_api_contracts::object::ObjectIO for SetDisks {
                object_class.as_str(),
                size_bucket,
            )
-            .await
-            {
-                let reason = classify_storage_error(&e);
+            .await;
+            if let Err(e) = &producer_result {
+                let reason = classify_storage_error(e);
                if reason == GetObjectFailureReason::DownstreamClosed {
                    debug!(
                        event = EVENT_SET_DISK_WRITE,
@@ -1169,6 +1206,7 @@ impl crate::storage_api_contracts::object::ObjectIO for SetDisks {
                    );
                }
            };
+            let _ = producer_terminal_tx.send(producer_result.map(|_| ()));
        });

        Ok(reader)
@@ -2557,6 +2595,420 @@ impl<R: AsyncRead + Unpin> AsyncRead for TransitionUploadReader<R> {
    }
 }

+struct LegacyDuplexProducerReader<R> {
+    inner: Option<R>,
+    terminal: Option<tokio::sync::oneshot::Receiver<Result<()>>>,
+    inner_eof: bool,
+}
+
+impl<R> LegacyDuplexProducerReader<R> {
+    fn new(inner: R, terminal: tokio::sync::oneshot::Receiver<Result<()>>) -> Self {
+        Self {
+            inner: Some(inner),
+            terminal: Some(terminal),
+            inner_eof: false,
+        }
+    }
+}
+
+impl<R: AsyncRead + Unpin> AsyncRead for LegacyDuplexProducerReader<R> {
+    fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut ReadBuf<'_>) -> Poll<std::io::Result<()>> {
+        if buf.remaining() == 0 {
+            return Poll::Ready(Ok(()));
+        }
+        if !self.inner_eof {
+            let before = buf.filled().len();
+            if let Some(inner) = self.inner.as_mut() {
+                match Pin::new(inner).poll_read(cx, buf) {
+                    Poll::Pending => return Poll::Pending,
+                    Poll::Ready(Err(err)) => return Poll::Ready(Err(err)),
+                    Poll::Ready(Ok(())) if buf.filled().len() > before => return Poll::Ready(Ok(())),
+                    Poll::Ready(Ok(())) => {
+                        self.inner_eof = true;
+                        self.inner = None;
+                    }
+                }
+            } else {
+                self.inner_eof = true;
+            }
+        }
+
+        let Some(terminal) = self.terminal.as_mut() else {
+            return Poll::Ready(Ok(()));
+        };
+        match Pin::new(terminal).poll(cx) {
+            Poll::Pending => Poll::Pending,
+            Poll::Ready(Ok(Ok(()))) => {
+                self.terminal = None;
+                Poll::Ready(Ok(()))
+            }
+            Poll::Ready(Ok(Err(err))) => {
+                self.terminal = None;
+                Poll::Ready(Err(std::io::Error::other(err)))
+            }
+            Poll::Ready(Err(_)) => {
+                self.terminal = None;
+                Poll::Ready(Err(std::io::Error::other(StorageError::Unexpected)))
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod legacy_duplex_producer_reader_tests {
+    use super::*;
+    use crate::object_api::{EncryptionResolutionError, ObjectEncryptionResolver, ReadEncryptionMaterial, ReadEncryptionMode};
+    use rustfs_utils::CompressionAlgorithm;
+    use std::collections::HashMap;
+    use std::sync::Arc;
+    use tokio::io::{AsyncReadExt, AsyncWriteExt};
+
+    const TEST_DUPLEX_CAPACITY: usize = 64 * 1024;
+
+    fn storage_error_source(error: &std::io::Error) -> &StorageError {
+        error
+            .get_ref()
+            .and_then(|source| source.downcast_ref::<StorageError>())
+            .expect("legacy duplex terminal error should retain StorageError source")
+    }
+
+    async fn compressed_fixture(plaintext: Vec<u8>, recorded_size: usize) -> (Vec<u8>, ObjectInfo) {
+        let mut compressor = rustfs_rio::CompressReader::new(std::io::Cursor::new(plaintext), CompressionAlgorithm::default());
+        let mut compressed = Vec::new();
+        compressor
+            .read_to_end(&mut compressed)
+            .await
+            .expect("compress test plaintext");
+
+        let mut metadata = HashMap::new();
+        rustfs_utils::http::insert_str(
+            &mut metadata,
+            rustfs_utils::http::SUFFIX_COMPRESSION,
+            CompressionAlgorithm::default().to_string(),
+        );
+        rustfs_utils::http::insert_str(&mut metadata, rustfs_utils::http::SUFFIX_ACTUAL_SIZE, recorded_size.to_string());
+        let object_info = ObjectInfo {
+            size: i64::try_from(compressed.len()).expect("compressed fixture length should fit in i64"),
+            user_defined: Arc::new(metadata),
+            ..Default::default()
+        };
+        (compressed, object_info)
+    }
+
+    #[tokio::test]
+    async fn legacy_duplex_reader_allows_clean_completion() {
+        let (mut writer, reader) = tokio::io::duplex(64);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        writer
+            .write_all(b"complete")
+            .await
+            .expect("duplex write should fit in buffer");
+        drop(writer);
+        terminal_tx.send(Ok(())).expect("terminal receiver should remain installed");
+
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+        let mut out = Vec::new();
+        reader
+            .read_to_end(&mut out)
+            .await
+            .expect("clean producer completion should surface clean EOF");
+
+        assert_eq!(out, b"complete");
+    }
+
+    #[tokio::test]
+    async fn legacy_duplex_reader_ignores_zero_capacity_read_buf() {
+        let (mut writer, reader) = tokio::io::duplex(64);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        writer.write_all(b"body").await.expect("duplex write should fit in buffer");
+        drop(writer);
+        terminal_tx
+            .send(Err(StorageError::FileCorrupt))
+            .expect("terminal receiver should remain installed");
+
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+        let mut empty = [];
+        std::future::poll_fn(|cx| {
+            let mut read_buf = ReadBuf::new(&mut empty);
+            Pin::new(&mut reader).poll_read(cx, &mut read_buf)
+        })
+        .await
+        .expect("zero-capacity reads should complete without observing EOF or terminal state");
+        assert!(!reader.inner_eof);
+        assert!(reader.terminal.is_some());
+
+        let mut out = Vec::new();
+        let err = reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("subsequent reads must still receive data and the terminal error");
+        assert_eq!(out, b"body");
+        assert!(matches!(storage_error_source(&err), StorageError::FileCorrupt));
+    }
+
+    #[tokio::test]
+    async fn legacy_duplex_reader_surfaces_terminal_error_after_partial_data() {
+        let (mut writer, reader) = tokio::io::duplex(64);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        writer.write_all(b"partial").await.expect("duplex write should fit in buffer");
+        drop(writer);
+        terminal_tx
+            .send(Err(StorageError::FileCorrupt))
+            .expect("terminal receiver should remain installed");
+
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+        let mut out = Vec::new();
+        let err = reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("terminal producer error must not become clean EOF");
+
+        assert_eq!(out, b"partial");
+        assert!(matches!(storage_error_source(&err), StorageError::FileCorrupt));
+    }
+
+    #[tokio::test]
+    async fn legacy_duplex_reader_surfaces_terminal_error_after_declared_length() {
+        let (mut writer, reader) = tokio::io::duplex(64);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        writer.write_all(b"exact").await.expect("duplex write should fit in buffer");
+        drop(writer);
+        terminal_tx
+            .send(Err(StorageError::Io(std::io::Error::new(
+                std::io::ErrorKind::ConnectionReset,
+                "remote body reset after final byte",
+            ))))
+            .expect("terminal receiver should remain installed");
+
+        let reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+        let mut reader =
+            HashReader::from_stream(reader, 5, 5, None, None, false).expect("hash reader should accept exact declared length");
+        let mut out = Vec::new();
+        let err = reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("producer terminal error after the declared length must still fail");
+
+        assert_eq!(out, b"exact");
+        assert!(
+            matches!(storage_error_source(&err), StorageError::Io(io_error) if io_error.kind() == std::io::ErrorKind::ConnectionReset)
+        );
+    }
+
+    #[tokio::test]
+    async fn legacy_compressed_reader_surfaces_terminal_error_after_complete_plaintext() {
+        let plaintext = b"compressed terminal result must survive the plaintext limit".repeat(16);
+        let (compressed, object_info) = compressed_fixture(plaintext.clone(), plaintext.len()).await;
+        let full_range = HTTPRangeSpec {
+            is_suffix_length: false,
+            start: 0,
+            end: i64::try_from(plaintext.len()).expect("plaintext fixture length should fit in i64") - 1,
+        };
+        for range in [None, Some(full_range)] {
+            let (mut writer, reader) = tokio::io::duplex(compressed.len().max(1));
+            writer
+                .write_all(&compressed)
+                .await
+                .expect("compressed body should fit in duplex buffer");
+            drop(writer);
+            let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+            terminal_tx
+                .send(Err(StorageError::FileCorrupt))
+                .expect("terminal receiver should remain installed");
+
+            let (mut reader, _, _) = get_legacy_object_reader_with_context(
+                &InstanceContext::new(),
+                reader,
+                terminal_rx,
+                range,
+                &object_info,
+                &ObjectOptions::default(),
+                &HeaderMap::new(),
+            )
+            .await
+            .expect("compressed read plan should build");
+            let mut out = Vec::new();
+            let err = reader
+                .read_to_end(&mut out)
+                .await
+                .expect_err("terminal error after complete decompression must not become clean EOF");
+
+            assert_eq!(out, plaintext);
+            assert!(matches!(storage_error_source(&err), StorageError::FileCorrupt));
+        }
+    }
+
+    #[tokio::test]
+    async fn legacy_exact_reader_rejects_extra_data_without_backpressure_deadlock() {
+        let payload = vec![0x5a; TEST_DUPLEX_CAPACITY * 2];
+        let (mut writer, reader) = tokio::io::duplex(TEST_DUPLEX_CAPACITY);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        let producer = tokio::spawn(async move {
+            let result = writer.write_all(&payload).await;
+            drop(writer);
+            let terminal_result = result
+                .as_ref()
+                .map(|_| ())
+                .map_err(|err| StorageError::Io(std::io::Error::new(err.kind(), err.to_string())));
+            let _ = terminal_tx.send(terminal_result);
+            result
+        });
+        let reader = crate::io_support::rio::HardLimitReader::new(reader, 1);
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+
+        let mut out = Vec::new();
+        tokio::time::timeout(std::time::Duration::from_secs(1), reader.read_to_end(&mut out))
+            .await
+            .expect("extra data beyond the declared size must not deadlock")
+            .expect_err("extra data beyond the declared size must fail closed");
+        assert_eq!(out, [0x5a]);
+        drop(reader);
+        let _ = tokio::time::timeout(std::time::Duration::from_secs(1), producer)
+            .await
+            .expect("producer must unblock after the read fails")
+            .expect("producer task should not panic");
+    }
+
+    #[tokio::test]
+    async fn legacy_terminal_reader_releases_unconsumed_source_before_waiting() {
+        let payload = vec![0x5a; TEST_DUPLEX_CAPACITY * 2];
+        let (mut writer, reader) = tokio::io::duplex(TEST_DUPLEX_CAPACITY);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+        let producer = tokio::spawn(async move {
+            let result = writer.write_all(&payload).await;
+            drop(writer);
+            let terminal_result = result
+                .as_ref()
+                .map(|_| ())
+                .map_err(|err| StorageError::Io(std::io::Error::new(err.kind(), err.to_string())));
+            let _ = terminal_tx.send(terminal_result);
+            result
+        });
+        let reader = rustfs_rio::LimitReader::new(reader, 1);
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+
+        let mut out = Vec::new();
+        let err = tokio::time::timeout(std::time::Duration::from_secs(1), reader.read_to_end(&mut out))
+            .await
+            .expect("terminal wait must not deadlock behind unconsumed source data")
+            .expect_err("unconsumed source data must fail the producer terminal result");
+        assert_eq!(out, [0x5a]);
+        assert!(
+            matches!(storage_error_source(&err), StorageError::Io(io_error) if io_error.kind() == std::io::ErrorKind::BrokenPipe)
+        );
+        producer
+            .await
+            .expect("producer task should not panic")
+            .expect_err("source should close early");
+    }
+
+    struct FixedEncryptionResolver {
+        key_bytes: [u8; 32],
+        base_nonce: [u8; 12],
+    }
+
+    #[async_trait::async_trait]
+    impl ObjectEncryptionResolver for FixedEncryptionResolver {
+        async fn resolve_read_material(
+            &self,
+            _request: crate::object_api::ReadEncryptionRequest<'_>,
+        ) -> std::result::Result<Option<ReadEncryptionMaterial>, EncryptionResolutionError> {
+            Ok(Some(ReadEncryptionMaterial {
+                key_bytes: self.key_bytes,
+                mode: ReadEncryptionMode::Direct {
+                    base_nonce: self.base_nonce,
+                },
+            }))
+        }
+    }
+
+    #[tokio::test]
+    async fn legacy_encrypted_reader_surfaces_terminal_error_after_complete_plaintext() {
+        let plaintext = b"encrypted terminal result must survive the plaintext limit".repeat(16);
+        let key_bytes = [0x31; 32];
+        let base_nonce = [0x42; 12];
+        let mut encryptor = rustfs_rio::EncryptReader::new(std::io::Cursor::new(plaintext.clone()), key_bytes, base_nonce);
+        let mut encrypted = Vec::new();
+        encryptor.read_to_end(&mut encrypted).await.expect("encrypt test plaintext");
+
+        let object_info = ObjectInfo {
+            bucket: "bucket".to_string(),
+            name: "encrypted-object".to_string(),
+            size: i64::try_from(encrypted.len()).expect("encrypted fixture length should fit in i64"),
+            user_defined: Arc::new(HashMap::from([
+                ("x-amz-server-side-encryption-customer-algorithm".to_string(), "AES256".to_string()),
+                (
+                    "x-amz-server-side-encryption-customer-original-size".to_string(),
+                    plaintext.len().to_string(),
+                ),
+            ])),
+            ..Default::default()
+        };
+        let ctx = InstanceContext::new();
+        assert!(
+            ctx.set_object_encryption_resolver(Arc::new(FixedEncryptionResolver { key_bytes, base_nonce }))
+                .is_ok(),
+            "fresh context should accept resolver"
+        );
+        let full_range = HTTPRangeSpec {
+            is_suffix_length: false,
+            start: 0,
+            end: i64::try_from(plaintext.len()).expect("plaintext fixture length should fit in i64") - 1,
+        };
+        for range in [None, Some(full_range)] {
+            let (mut writer, reader) = tokio::io::duplex(encrypted.len().max(1));
+            writer
+                .write_all(&encrypted)
+                .await
+                .expect("encrypted body should fit in duplex buffer");
+            drop(writer);
+            let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel();
+            terminal_tx
+                .send(Err(StorageError::FileCorrupt))
+                .expect("terminal receiver should remain installed");
+
+            let (mut reader, _, _) = get_legacy_object_reader_with_context(
+                &ctx,
+                reader,
+                terminal_rx,
+                range,
+                &object_info,
+                &ObjectOptions::default(),
+                &HeaderMap::new(),
+            )
+            .await
+            .expect("encrypted read plan should build");
+            let mut out = Vec::new();
+            let err = reader
+                .read_to_end(&mut out)
+                .await
+                .expect_err("terminal error after complete decryption must not become clean EOF");
+
+            assert_eq!(out, plaintext);
+            assert!(matches!(storage_error_source(&err), StorageError::FileCorrupt));
+        }
+    }
+
+    #[tokio::test]
+    async fn legacy_duplex_reader_fails_closed_when_terminal_channel_closes() {
+        let (mut writer, reader) = tokio::io::duplex(64);
+        let (terminal_tx, terminal_rx) = tokio::sync::oneshot::channel::<Result<()>>();
+        writer.write_all(b"body").await.expect("duplex write should fit in buffer");
+        drop(writer);
+        drop(terminal_tx);
+
+        let mut reader = LegacyDuplexProducerReader::new(reader, terminal_rx);
+        let mut out = Vec::new();
+        let err = reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("producer disappearance must fail closed");
+
+        assert_eq!(out, b"body");
+        assert!(matches!(storage_error_source(&err), StorageError::Unexpected));
+    }
+}
+
 struct TransitionUploadWriter<W> {
    inner: W,
    produced: u64,
@@ -3055,6 +3507,10 @@ struct TransitionUploadedSaveProbeState {
 }

 #[cfg(test)]
+#[allow(
+    dead_code,
+    reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+)]
 struct TransitionUploadedSaveProbe {
    state: Arc<TransitionUploadedSaveProbeState>,
 }
@@ -3065,6 +3521,10 @@ static TRANSITION_UPLOADED_SAVE_PROBE: std::sync::OnceLock<std::sync::Mutex<Opti

 #[cfg(test)]
 impl TransitionUploadedSaveProbe {
+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn install(bucket: &str, object: &str) -> Self {
        let state = Arc::new(TransitionUploadedSaveProbeState {
            bucket: bucket.to_string(),
@@ -3081,6 +3541,10 @@ impl TransitionUploadedSaveProbe {
        Self { state }
    }

+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn attempts(&self) -> usize {
        self.state.attempts.load(std::sync::atomic::Ordering::Acquire)
    }
@@ -3286,6 +3750,10 @@ struct TransitionCommitBarrierState {
 }

 #[cfg(test)]
+#[allow(
+    dead_code,
+    reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+)]
 struct TransitionCommitBarrier {
    state: Arc<TransitionCommitBarrierState>,
 }
@@ -3296,14 +3764,26 @@ static TRANSITION_COMMIT_BARRIER: std::sync::OnceLock<std::sync::Mutex<Option<Ar

 #[cfg(test)]
 impl TransitionCommitBarrier {
+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn install_before_lock_lost_check(bucket: &str, object: &str) -> Self {
        Self::install_at(bucket, object, TransitionCommitPause::BeforeLockLost)
    }

+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn install(bucket: &str, object: &str) -> Self {
        Self::install_at(bucket, object, TransitionCommitPause::BeforeLeaseValidation)
    }

+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn install_after_lease_check(bucket: &str, object: &str) -> Self {
        Self::install_at(bucket, object, TransitionCommitPause::AfterLeaseValidation)
    }
@@ -3326,12 +3806,20 @@ impl TransitionCommitBarrier {
        Self { state }
    }

+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    async fn wait_until_paused(&self) {
        tokio::time::timeout(Duration::from_secs(30), self.state.arrived.notified())
            .await
            .expect("transition should reach the deterministic commit barrier");
    }

+    #[allow(
+        dead_code,
+        reason = "installed by set_disk tests behind `--features test-util` (backlog#1823)"
+    )]
    fn release(&self) {
        self.state.release.notify_one();
    }
@@ -6065,6 +6553,7 @@ impl crate::storage_api_contracts::object::ObjectOperations for SetDisks {
                &oi,
                &opts,
                &self_.ctx.tier_config_mgr(),
+                self_.ctx.object_encryption_resolver(),
            )
            .await;
            if let Err(err) = gr {
@@ -6134,6 +6623,7 @@ impl crate::storage_api_contracts::object::ObjectOperations for SetDisks {
                    &oi,
                    &part_opts,
                    &self_.ctx.tier_config_mgr(),
+                    self_.ctx.object_encryption_resolver(),
                )
                .await
                .map_err(StorageError::Io)?;
@@ -11180,7 +11670,7 @@ mod put_object_tmp_cleanup_tests {
    use tokio::io::AsyncReadExt;

    /// Large enough that the erasure shards are written as real tmp files
-    /// (never inlined into xl.meta), so both tests exercise actual cleanup.
+    /// (never inlined into xl.meta), so the cleanup tests exercise actual cleanup.
    const TEST_OBJECT_SIZE: usize = 1 << 20;

    /// Entries under `.rustfs.sys/tmp` on every disk, excluding the `.trash`
@@ -11204,6 +11694,18 @@ mod put_object_tmp_cleanup_tests {
        leftovers
    }

+    async fn wait_for_tmp_workspace_to_drain(temp_dirs: &[TempDir], failure_context: &str) {
+        let deadline = tokio::time::Instant::now() + Duration::from_secs(10);
+        loop {
+            let leftovers = non_trash_tmp_entries(temp_dirs).await;
+            if leftovers.is_empty() {
+                break;
+            }
+            assert!(tokio::time::Instant::now() < deadline, "{failure_context}, leftovers: {leftovers:?}");
+            tokio::time::sleep(Duration::from_millis(25)).await;
+        }
+    }
+
    #[tokio::test]
    async fn put_object_success_eventually_cleans_tmp_workspace() {
        let (temp_dirs, disk_stores, set_disks) = hermetic_set_disks(4).await;
@@ -11219,22 +11721,39 @@ mod put_object_tmp_cleanup_tests {
            .await
            .expect("put_object should succeed");

-        // The speculative cleanup runs on a spawned task off the PUT response
-        // path, so poll for the tmp workspace to drain instead of asserting
-        // immediately.
-        let deadline = tokio::time::Instant::now() + Duration::from_secs(10);
-        loop {
-            let leftovers = non_trash_tmp_entries(&temp_dirs).await;
-            if leftovers.is_empty() {
-                break;
-            }
-            assert!(
-                tokio::time::Instant::now() < deadline,
-                "tmp workspace should drain after a successful PUT, leftovers: {leftovers:?}"
-            );
-            tokio::time::sleep(Duration::from_millis(25)).await;
+        wait_for_tmp_workspace_to_drain(&temp_dirs, "tmp workspace should drain after a successful PUT").await;
+
+        drop(temp_dirs);
+    }
+
+    #[tokio::test]
+    async fn cancelled_put_before_rename_cleans_tmp_workspace() {
+        let (temp_dirs, disk_stores, set_disks) = hermetic_set_disks(4).await;
+
+        let bucket = "tmp-clean-cancelled-bucket";
+        let object = "cancelled-object";
+        for disk in &disk_stores {
+            disk.make_volume(bucket).await.expect("bucket volume should be created");
        }

+        let barrier = PutObjectCommitBarrier::install(bucket, object, PutObjectCommitPause::AfterQuotaReservation);
+        let cancelled_set = set_disks.clone();
+        let put = tokio::spawn(async move {
+            let mut reader = PutObjReader::from_vec(vec![8u8; TEST_OBJECT_SIZE]);
+            cancelled_set
+                .put_object(bucket, object, &mut reader, &ObjectOptions::default())
+                .await
+        });
+        barrier.wait_until_paused().await;
+        put.abort();
+        let join_error = put.await.expect_err("the paused PUT task must be cancelled");
+        assert!(join_error.is_cancelled(), "the paused PUT task must not panic");
+
+        // Keep the barrier armed so a detached child cannot proceed and hide
+        // missing cancellation cleanup.
+        wait_for_tmp_workspace_to_drain(&temp_dirs, "cancelling before rename should drain the tmp workspace").await;
+
+        drop(barrier);
        drop(temp_dirs);
    }

@@ -116,6 +116,7 @@ impl SetDisks {
            .then_some(GET_METADATA_CACHE_REASON_DIST_ERASURE)
    }

+    #[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
    async fn cached_get_object_fileinfo(&self, bucket: &str, object: &str) -> Option<Arc<GetObjectMetadataCacheEntry>> {
        match self.lookup_cached_get_object_fileinfo(bucket, object).await {
            MetadataCacheLookup::Hit(entry) => Some(entry),
@@ -1826,6 +1827,7 @@ fn get_object_metadata_cache_request_bypass_reason(bucket: &str, opts: &ObjectOp
        .then_some(GET_METADATA_CACHE_REASON_META_BUCKET)
 }

+#[allow(dead_code, reason = "asserted by this file's tests (backlog#1823)")]
 fn is_get_object_metadata_cache_request_eligible(bucket: &str, opts: &ObjectOptions, read_data: bool) -> bool {
    get_object_metadata_cache_request_bypass_reason(bucket, opts, read_data).is_none()
 }
@@ -1,81 +0,0 @@
-// 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 super::*;
-
-impl ECStore {
-    #[instrument(level = "trace", skip(self))]
-    #[allow(clippy::too_many_arguments)]
-    pub(super) async fn handle_list_objects_v2(
-        self: Arc<Self>,
-        bucket: &str,
-        prefix: &str,
-        continuation_token: Option<String>,
-        delimiter: Option<String>,
-        max_keys: i32,
-        fetch_owner: bool,
-        start_after: Option<String>,
-        incl_deleted: bool,
-    ) -> Result<ListObjectsV2Info> {
-        self.inner_list_objects_v2(
-            bucket,
-            prefix,
-            continuation_token,
-            delimiter,
-            max_keys,
-            fetch_owner,
-            start_after,
-            incl_deleted,
-        )
-        .await
-    }
-
-    #[instrument(skip(self))]
-    pub(super) async fn handle_list_object_versions(
-        self: Arc<Self>,
-        bucket: &str,
-        prefix: &str,
-        marker: Option<String>,
-        version_marker: Option<String>,
-        delimiter: Option<String>,
-        max_keys: i32,
-    ) -> Result<ListObjectVersionsInfo> {
-        self.inner_list_object_versions(bucket, prefix, marker, version_marker, delimiter, max_keys)
-            .await
-    }
-
-    pub(crate) async fn list_object_versions_for_lifecycle(
-        self: Arc<Self>,
-        bucket: &str,
-        prefix: &str,
-        marker: Option<String>,
-        version_marker: Option<String>,
-        delimiter: Option<String>,
-        max_keys: i32,
-    ) -> Result<ListObjectVersionsInfo> {
-        self.inner_list_object_versions_for_lifecycle(bucket, prefix, marker, version_marker, delimiter, max_keys)
-            .await
-    }
-
-    pub(super) async fn handle_walk(
-        self: Arc<Self>,
-        rx: CancellationToken,
-        bucket: &str,
-        prefix: &str,
-        result: tokio::sync::mpsc::Sender<ObjectInfoOrErr>,
-        opts: WalkOptions,
-    ) -> Result<()> {
-        self.walk_internal(rx, bucket, prefix, result, opts).await
-    }
-}
@@ -3845,7 +3845,7 @@ impl ECStore {
        .await
    }

-    pub(crate) async fn inner_list_object_versions_for_lifecycle(
+    pub(crate) async fn list_object_versions_for_lifecycle(
        self: Arc<Self>,
        bucket: &str,
        prefix: &str,
@@ -148,7 +148,6 @@ mod heal_walk;
 pub use heal_walk::HealWalkVersion;
 mod init;
 pub(crate) mod init_format;
-mod list;
 pub(crate) mod list_objects;
 mod multipart;
 mod object;
@@ -601,7 +600,7 @@ impl crate::storage_api_contracts::list::ListOperations for ECStore {
        start_after: Option<String>,
        incl_deleted: bool,
    ) -> Result<ListObjectsV2Info> {
-        self.handle_list_objects_v2(
+        self.inner_list_objects_v2(
            bucket,
            prefix,
            continuation_token,
@@ -624,7 +623,7 @@ impl crate::storage_api_contracts::list::ListOperations for ECStore {
        delimiter: Option<String>,
        max_keys: i32,
    ) -> Result<ListObjectVersionsInfo> {
-        self.handle_list_object_versions(bucket, prefix, marker, version_marker, delimiter, max_keys)
+        self.inner_list_object_versions(bucket, prefix, marker, version_marker, delimiter, max_keys)
            .await
    }

@@ -636,7 +635,7 @@ impl crate::storage_api_contracts::list::ListOperations for ECStore {
        result: tokio::sync::mpsc::Sender<ObjectInfoOrErr>,
        opts: WalkOptions,
    ) -> Result<()> {
-        self.handle_walk(rx, bucket, prefix, result, opts).await
+        self.walk_internal(rx, bucket, prefix, result, opts).await
    }
 }

@@ -157,6 +157,18 @@ fn ecstore_implements_storage_list_operations_contract() {
    assert!(storage_list_operations_type_name::<ECStore>().ends_with("::ECStore"));
 }

+#[test]
+fn ecstore_pools_expose_storage_list_operations_contract() {
+    fn assert_contract(store: &ECStore) {
+        let future = store.pools[0]
+            .clone()
+            .list_objects_v2("bucket", "", None, None, 1, false, None, false);
+        drop(future);
+    }
+
+    let _ = assert_contract;
+}
+
 #[test]
 fn ecstore_implements_storage_multipart_operations_contract() {
    assert!(storage_multipart_operations_type_name::<ECStore>().ends_with("::ECStore"));
@@ -135,10 +135,7 @@ impl FileMeta {
        let i = buf.len() as u64;

        // check version, buf = buf[8..]
-        let (buf, _, _) = Self::check_xl2_v1(buf).map_err(|e| {
-            error!("failed to check XL2 v1 format: {}", e);
-            e
-        })?;
+        let (buf, _, _) = Self::check_xl2_v1(buf)?;

        if buf.len() < 5 {
            error!(
@@ -82,8 +82,8 @@ impl Error {
    /// Whether a heal operation can be retried without changing its inputs.
    pub(crate) fn is_recoverable_heal(&self) -> bool {
        match self {
-            Error::TaskCancelled => false,
-            Error::TaskTimeout | Error::TransientSkip { .. } => true,
+            Error::TaskCancelled | Error::TaskTimeout => false,
+            Error::TransientSkip { .. } => true,
            Error::Storage(err) => {
                err.is_quorum_error()
                    || matches!(
@@ -165,4 +165,9 @@ mod tests {
        assert!(Error::Storage(EcstoreError::DiskNotFound).is_recoverable_heal());
        assert!(Error::Storage(EcstoreError::VolumeNotFound).is_recoverable_heal());
    }
+
+    #[test]
+    fn task_timeout_is_terminal() {
+        assert!(!Error::TaskTimeout.is_recoverable_heal());
+    }
 }
@@ -673,6 +673,12 @@ fn retry_request_for_result(task: &HealTask, result: &Result<()>) -> Option<(Hea
    Some((request, delay, error))
 }

+async fn retry_request_for_result_with_budget(task: &HealTask, result: &Result<()>) -> Option<(HealRequest, Duration, String)> {
+    let (_, delay, error) = retry_request_for_result(task, result)?;
+    let request = task.retry_request_with_remaining_timeout().await.ok()?;
+    Some((request, delay, error))
+}
+
 fn recoverable_heal_retry_delay(retry_attempt: u32) -> Duration {
    let retry_attempt = retry_attempt.clamp(1, 5);
    let delay = Duration::from_secs(2_u64.saturating_pow(retry_attempt));
@@ -690,7 +696,7 @@ pub struct HealConfig {
    pub max_concurrent_heals: usize,
    /// Maximum concurrent heal tasks allowed for a single erasure set
    pub max_concurrent_per_set: usize,
-    /// Task timeout
+    /// Aggregate task execution timeout across recoverable retries
    pub task_timeout: Duration,
    /// Queue size
    pub queue_size: usize,
@@ -3106,7 +3112,7 @@ impl HealManager {
                        "Heal scheduler task started"
                    );
                    let result = task.execute().await;
-                    let retry_request = retry_request_for_result(task.as_ref(), &result);
+                    let retry_request = retry_request_for_result_with_budget(task.as_ref(), &result).await;
                    match &result {
                        Ok(_) => {
                            debug!(
@@ -4539,6 +4545,25 @@ mod tests {
        assert!(retry_error.contains("Lock acquisition timeout"));
    }

+    #[tokio::test]
+    async fn retry_request_for_result_preserves_remaining_timeout_budget() {
+        let storage: Arc<dyn HealStorageAPI> = Arc::new(MockStorage);
+        let mut request = HealRequest::object("retry-transition".to_string(), "object".to_string(), None);
+        request.options.timeout = Some(Duration::from_secs(60));
+        let task = HealTask::from_request(request, storage);
+        let result = task.execute().await;
+
+        let (retry_request, _, _) = retry_request_for_result_with_budget(&task, &result)
+            .await
+            .expect("read quorum failure should retain the unused timeout budget");
+        let remaining = retry_request
+            .options
+            .timeout
+            .expect("configured timeout should remain present");
+        assert!(remaining < Duration::from_secs(60));
+        assert!(remaining > Duration::from_secs(59));
+    }
+
    #[test]
    fn test_retry_request_for_incomplete_heal_rename() {
        let storage: Arc<dyn HealStorageAPI> = Arc::new(MockStorage);
@@ -6054,7 +6079,7 @@ mod tests {
        process_manager_queue_once(&manager).await;
        let defaulted_status = tokio::time::timeout(Duration::from_secs(1), async {
            loop {
-                if let Ok(status @ HealTaskStatus::Retrying { .. }) = manager.get_task_status(&defaulted_id).await {
+                if let Ok(status @ HealTaskStatus::Timeout) = manager.get_task_status(&defaulted_id).await {
                    break status;
                }
                tokio::task::yield_now().await;
@@ -6062,23 +6087,8 @@ mod tests {
        })
        .await
        .expect("configured timeout should finish the task");
-        assert!(matches!(defaulted_status, HealTaskStatus::Retrying { .. }));
-        assert_eq!(
-            manager
-                .retrying_heals
-                .lock()
-                .await
-                .get(&defaulted_id)
-                .expect("timed out task should retain its retry request")
-                .request
-                .options
-                .timeout,
-            Some(Duration::ZERO)
-        );
-        manager
-            .cancel_task(&defaulted_id)
-            .await
-            .expect("retrying timeout task should be cancelled");
+        assert_eq!(defaulted_status, HealTaskStatus::Timeout);
+        assert!(manager.retrying_heals.lock().await.get(&defaulted_id).is_none());

        let mut explicit = bucket_request("explicit-timeout", HealPriority::Normal, HealRequestSource::Admin);
        explicit.options.timeout = Some(Duration::from_secs(60));
@@ -196,7 +196,7 @@ pub struct HealOptions {
    /// Whether to skip namespace locking
    #[serde(default)]
    pub no_lock: bool,
-    /// Timeout
+    /// Aggregate execution timeout across recoverable manager retries
    pub timeout: Option<Duration>,
    /// pool index
    pub pool_index: Option<usize>,
@@ -442,6 +442,14 @@ impl HealTask {
        }
    }

+    pub(crate) async fn retry_request_with_remaining_timeout(&self) -> Result<HealRequest> {
+        let mut request = self.retry_request();
+        if self.options.timeout.is_some() {
+            request.options.timeout = self.remaining_timeout().await?;
+        }
+        Ok(request)
+    }
+
    pub(crate) fn from_replacement_recovery_request(
        request: HealRequest,
        storage: Arc<dyn HealStorageAPI>,
@@ -2657,6 +2665,36 @@ mod tests {

    use super::super::storage_api::status::BucketInfo;

+    #[tokio::test]
+    async fn retry_request_carries_remaining_timeout_budget() {
+        let storage: Arc<dyn HealStorageAPI> = Arc::new(MockStorage::default());
+        let mut request = HealRequest::bucket("bucket".to_string());
+        request.options.timeout = Some(Duration::from_secs(100));
+        let task = HealTask::from_request(request, storage.clone());
+        *task.task_start_instant.write().await = Some(Instant::now() - Duration::from_secs(40));
+
+        let retry = task
+            .retry_request_with_remaining_timeout()
+            .await
+            .expect("first retry should retain the unused timeout budget");
+        let first_remaining = retry.options.timeout.expect("configured timeout should remain present");
+        assert!(first_remaining <= Duration::from_secs(60));
+        assert!(first_remaining > Duration::from_secs(59));
+
+        let retry_task = HealTask::from_request(retry, storage);
+        *retry_task.task_start_instant.write().await = Some(Instant::now() - Duration::from_secs(20));
+        let second_retry = retry_task
+            .retry_request_with_remaining_timeout()
+            .await
+            .expect("second retry should retain only the unused aggregate budget");
+        let second_remaining = second_retry
+            .options
+            .timeout
+            .expect("configured timeout should remain present");
+        assert!(second_remaining <= Duration::from_secs(40));
+        assert!(second_remaining > Duration::from_secs(39));
+    }
+
    #[test]
    fn format_result_requires_every_requested_target_to_be_ok() {
        let result = HealResultItem {
@@ -225,8 +225,6 @@ async fn nothing_readable_leaves_the_bundle_unwrapped() {
            "artifact {} carries the raw on-disk record",
            artifact.path
        );
-        // A cheap structural check too: an encrypted payload is not JSON.
-        assert_ne!(payload.first(), Some(&b'{'), "artifact {} looks like plaintext JSON", artifact.path);
    }

    // The manifest itself is not encrypted, so assert directly that it carries
@@ -103,11 +103,7 @@ pub(super) fn rules() -> Vec<Rule> {
                P2Degraded,
                "heal",
                "heal 任务调度/执行失败",
-                any([
-                    prefix("Heal task timeout"),
-                    prefix("Heal task execution failed"),
-                    contains("Heal manager is not running"),
-                ]),
+                any([prefix("Heal task timeout"), prefix("Heal task execution failed")]),
                "heal 任务调度/执行层故障。",
                "检查 heal 后台服务状态与资源压力。",
            )
@@ -520,6 +520,14 @@ struct FailureSample {
 pub struct FailStats {
    pub count: i64,
    pub size: i64,
+    /// Rolling-window snapshots refreshed at collection time
+    /// ([`Self::refresh_windows`]). The raw samples (`recent`) are process
+    /// local (serde-skipped), so these fields are what survives the peer-RPC
+    /// wire and [`Self::merge`]-based cluster aggregation.
+    #[serde(default)]
+    pub last_minute: FailedMetric,
+    #[serde(default)]
+    pub last_hour: FailedMetric,
    #[serde(skip)]
    recent: VecDeque<FailureSample>,
 }
@@ -537,6 +545,17 @@ impl FailStats {
        self.prune(observed_at);
    }

+    /// Recompute the serializable rolling-window snapshots from the local
+    /// samples. Called at the collection point (per-node stats snapshot),
+    /// never on the failure hot path — the two deque scans are O(window) and
+    /// `add_size` runs under the bucket-stats write lock. Only meaningful on
+    /// the live per-node struct: a deserialized or merged struct has no
+    /// samples, and refreshing it would wipe the aggregated windows.
+    pub fn refresh_windows(&mut self) {
+        self.last_minute = self.recent_since(Duration::from_secs(60));
+        self.last_hour = self.recent_since(Duration::from_secs(3600));
+    }
+
    fn prune(&mut self, observed_at: Instant) {
        while self
            .recent
@@ -565,6 +584,16 @@ impl FailStats {
        Self {
            count: self.count.saturating_add(other.count),
            size: self.size.saturating_add(other.size),
+            // The window snapshots sum across nodes; the raw samples do not
+            // travel and stay empty on aggregated structs.
+            last_minute: FailedMetric {
+                count: self.last_minute.count.saturating_add(other.last_minute.count),
+                size: self.last_minute.size.saturating_add(other.last_minute.size),
+            },
+            last_hour: FailedMetric {
+                count: self.last_hour.count.saturating_add(other.last_hour.count),
+                size: self.last_hour.size.saturating_add(other.last_hour.size),
+            },
            recent: VecDeque::new(),
        }
    }
@@ -636,7 +665,9 @@ impl BucketReplicationStat {
    }

    pub fn update_xfer_rate(&mut self, size: i64, duration: Duration) {
-        if size > 1024 * 1024 {
+        // Same boundary as the worker-pool split and minio-go's
+        // Large/Small transfer-summary labels: >= 128 MiB is "large".
+        if size >= crate::runtime::MIN_LARGE_OBJ_SIZE {
            self.xfer_rate_lrg.add_size(size, duration);
        } else {
            self.xfer_rate_sml.add_size(size, duration);
@@ -71,6 +71,7 @@ where

    /// Optional: allow users to customize block_size
    pub fn with_block_size(inner: R, block_size: usize, compression_algorithm: CompressionAlgorithm) -> Self {
+        debug_assert!(block_size > 0, "CompressReader block_size must be non-zero");
        Self {
            inner,
            buffer: Vec::new(),
@@ -183,11 +184,21 @@ pin_project! {
        buffer: Vec<u8>,
        buffer_pos: usize,
        finished: bool,
+        // A previously surfaced stream error is sticky: without this, a caller
+        // that polls again after an error would restart at the header phase and
+        // read a truncated tail as a clean EOF, converting the error into a
+        // silently short body.
+        poisoned: bool,
        // Fields for saving header read progress across polls
        header_buf: [u8; 8],
        header_read: usize,
-        header_done: bool,
-        // Fields for saving compressed block read progress across polls
+        // Fields for saving compressed block read progress across polls.
+        // `compressed_len > 0` means a block payload is in flight: the header has
+        // been fully parsed and `compressed_read` bytes of the payload are already
+        // consumed from the inner stream. The header phase must not run again (and
+        // must not reset `compressed_read`) until this block completes, or a
+        // `Poll::Pending` in the middle of a payload would silently drop the bytes
+        // read so far and desynchronize the block framing.
        compressed_buf: Vec<u8>,
        compressed_read: usize,
        compressed_len: usize,
@@ -205,9 +216,9 @@ where
            buffer: Vec::new(),
            buffer_pos: 0,
            finished: false,
+            poisoned: false,
            header_buf: [0u8; 8],
            header_read: 0,
-            header_done: false,
            compressed_buf: Vec::new(),
            compressed_read: 0,
            compressed_len: 0,
@@ -236,54 +247,74 @@ where
        if *this.finished {
            return Poll::Ready(Ok(()));
        }
-        // Read header
-        while !*this.header_done && *this.header_read < HEADER_LEN {
-            let mut temp = [0u8; HEADER_LEN];
-            let mut temp_buf = ReadBuf::new(&mut temp[0..HEADER_LEN - *this.header_read]);
-            match this.inner.as_mut().poll_read(cx, &mut temp_buf) {
-                Poll::Pending => return Poll::Pending,
-                Poll::Ready(Ok(())) => {
-                    let n = temp_buf.filled().len();
-                    if n == 0 {
-                        break;
+        if *this.poisoned {
+            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "decompress reader previously failed")));
+        }
+
+        if *this.compressed_len == 0 {
+            // Read the 8-byte block header, resuming across polls via `header_read`.
+            while *this.header_read < HEADER_LEN {
+                let mut temp = [0u8; HEADER_LEN];
+                let mut temp_buf = ReadBuf::new(&mut temp[0..HEADER_LEN - *this.header_read]);
+                match this.inner.as_mut().poll_read(cx, &mut temp_buf) {
+                    Poll::Pending => return Poll::Pending,
+                    Poll::Ready(Ok(())) => {
+                        let n = temp_buf.filled().len();
+                        if n == 0 {
+                            if *this.header_read == 0 {
+                                // Clean EOF on a block boundary.
+                                *this.finished = true;
+                                return Poll::Ready(Ok(()));
+                            }
+                            *this.poisoned = true;
+                            return Poll::Ready(Err(io::Error::new(
+                                io::ErrorKind::UnexpectedEof,
+                                "unexpected EOF while reading compressed block header",
+                            )));
+                        }
+                        this.header_buf[*this.header_read..*this.header_read + n].copy_from_slice(&temp_buf.filled()[..n]);
+                        *this.header_read += n;
+                    }
+                    Poll::Ready(Err(e)) => {
+                        // error!("DecompressReader poll_read: read header error: {e}");
+                        *this.poisoned = true;
+                        return Poll::Ready(Err(e));
                    }
-                    this.header_buf[*this.header_read..*this.header_read + n].copy_from_slice(&temp_buf.filled()[..n]);
-                    *this.header_read += n;
-                }
-                Poll::Ready(Err(e)) => {
-                    // error!("DecompressReader poll_read: read header error: {e}");
-                    return Poll::Ready(Err(e));
                }
            }
-            if *this.header_read < HEADER_LEN {
-                return Poll::Pending;
-            }
-        }
-        if !*this.header_done && *this.header_read == 0 {
-            return Poll::Ready(Ok(()));
-        }
-        let typ = this.header_buf[0];
-        let len = (this.header_buf[1] as usize) | ((this.header_buf[2] as usize) << 8) | ((this.header_buf[3] as usize) << 16);
-        let crc = (this.header_buf[4] as u32)
-            | ((this.header_buf[5] as u32) << 8)
-            | ((this.header_buf[6] as u32) << 16)
-            | ((this.header_buf[7] as u32) << 24);
-        *this.header_read = 0;
-        *this.header_done = true;

-        if typ == COMPRESS_TYPE_END {
+            let typ = this.header_buf[0];
+            let len =
+                (this.header_buf[1] as usize) | ((this.header_buf[2] as usize) << 8) | ((this.header_buf[3] as usize) << 16);
+            *this.header_read = 0;
+
+            // `CompressReader` never emits an end block — a stream terminates on
+            // inner EOF, which is what lets concatenated per-part streams decode as
+            // one. This branch is kept for streams that do carry the marker.
+            if typ == COMPRESS_TYPE_END {
+                *this.compressed_read = 0;
+                *this.compressed_len = 0;
+                *this.finished = true;
+                return Poll::Ready(Ok(()));
+            }
+            if typ != COMPRESS_TYPE_COMPRESSED && typ != COMPRESS_TYPE_UNCOMPRESSED {
+                // error!("DecompressReader unknown compression type: {typ}");
+                *this.poisoned = true;
+                return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Unknown compression type")));
+            }
+            if len == 0 {
+                *this.poisoned = true;
+                return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Invalid compressed block length")));
+            }
+
+            if this.compressed_buf.len() < len {
+                this.compressed_buf.resize(len, 0);
+            }
+            *this.compressed_len = len;
            *this.compressed_read = 0;
-            *this.compressed_len = 0;
-            *this.finished = true;
-            return Poll::Ready(Ok(()));
        }

-        if this.compressed_buf.len() < len {
-            this.compressed_buf.resize(len, 0);
-        }
-        *this.compressed_len = len;
-        *this.compressed_read = 0;
-
+        // Fill the in-flight block payload, resuming across polls via `compressed_read`.
        while *this.compressed_read < *this.compressed_len {
            let mut temp_buf = ReadBuf::new(&mut this.compressed_buf[*this.compressed_read..*this.compressed_len]);
            match this.inner.as_mut().poll_read(cx, &mut temp_buf) {
@@ -291,7 +322,13 @@ where
                Poll::Ready(Ok(())) => {
                    let n = temp_buf.filled().len();
                    if n == 0 {
-                        break;
+                        *this.compressed_read = 0;
+                        *this.compressed_len = 0;
+                        *this.poisoned = true;
+                        return Poll::Ready(Err(io::Error::new(
+                            io::ErrorKind::UnexpectedEof,
+                            "unexpected EOF while reading compressed block payload",
+                        )));
                    }
                    *this.compressed_read += n;
                }
@@ -299,10 +336,17 @@ where
                    // error!("DecompressReader poll_read: read compressed block error: {e}");
                    *this.compressed_read = 0;
                    *this.compressed_len = 0;
+                    *this.poisoned = true;
                    return Poll::Ready(Err(e));
                }
            }
        }
+
+        let typ = this.header_buf[0];
+        let crc = (this.header_buf[4] as u32)
+            | ((this.header_buf[5] as u32) << 8)
+            | ((this.header_buf[6] as u32) << 16)
+            | ((this.header_buf[7] as u32) << 24);
        let compressed_buf = &this.compressed_buf[..*this.compressed_len];
        // `compressed_buf`'s length comes from the untrusted 24-bit header length field, so it
        // can be shorter than 16 bytes. `uvarint` is safe on any slice length (reads at most 10
@@ -316,6 +360,7 @@ where
        if uvarint <= 0 || uvarint as usize > compressed_buf.len() {
            *this.compressed_read = 0;
            *this.compressed_len = 0;
+            *this.poisoned = true;
            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Invalid compressed block length prefix")));
        }
        let compressed_data = &compressed_buf[uvarint as usize..];
@@ -326,21 +371,29 @@ where
                    // error!("DecompressReader decompress_block error: {e}");
                    *this.compressed_read = 0;
                    *this.compressed_len = 0;
+                    *this.poisoned = true;
                    return Poll::Ready(Err(e));
                }
            }
-        } else if typ == COMPRESS_TYPE_UNCOMPRESSED {
-            compressed_data.to_vec()
        } else {
-            // error!("DecompressReader unknown compression type: {typ}");
+            // The header phase already rejected every type other than
+            // COMPRESS_TYPE_COMPRESSED / COMPRESS_TYPE_UNCOMPRESSED.
+            compressed_data.to_vec()
+        };
+        if decompressed.is_empty() {
+            // The writer never emits zero-length plaintext blocks; an empty
+            // decode surfacing as Ready(Ok) with no bytes would read as EOF and
+            // silently truncate the stream.
+            *this.poisoned = true;
            *this.compressed_read = 0;
            *this.compressed_len = 0;
-            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Unknown compression type")));
-        };
+            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Empty compressed block")));
+        }
        if decompressed.len() != uncompress_len as usize {
            // error!("DecompressReader decompressed length mismatch: {} != {}", decompressed.len(), uncompress_len);
            *this.compressed_read = 0;
            *this.compressed_len = 0;
+            *this.poisoned = true;
            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "Decompressed length mismatch")));
        }
        let actual_crc = {
@@ -352,13 +405,13 @@ where
            // error!("DecompressReader CRC32 mismatch: actual {actual_crc} != expected {crc}");
            *this.compressed_read = 0;
            *this.compressed_len = 0;
+            *this.poisoned = true;
            return Poll::Ready(Err(io::Error::new(io::ErrorKind::InvalidData, "CRC32 mismatch")));
        }
        *this.buffer = decompressed;
        *this.buffer_pos = 0;
        *this.compressed_read = 0;
        *this.compressed_len = 0;
-        *this.header_done = false;
        let to_copy = min(buf.remaining(), this.buffer.len());
        buf.put_slice(&this.buffer[..to_copy]);
        *this.buffer_pos += to_copy;
@@ -493,6 +546,184 @@ mod tests {
        assert_eq!(&decompressed, &data);
    }

+    /// Wraps a reader so every other poll returns `Poll::Pending` and every
+    /// `Ready` poll serves at most `chunk` bytes. This is the shape a duplex
+    /// pipe produces when the erasure writer is slower than the decoder, which
+    /// is exactly what desynchronized the block framing before the resumable
+    /// payload state was added (rustfs/rustfs#5957 multipart GET truncation).
+    struct PendingChunkReader<R> {
+        inner: R,
+        chunk: usize,
+        pending_next: bool,
+    }
+
+    impl<R> PendingChunkReader<R> {
+        fn new(inner: R, chunk: usize) -> Self {
+            Self {
+                inner,
+                chunk,
+                pending_next: true,
+            }
+        }
+    }
+
+    impl<R: AsyncRead + Unpin> AsyncRead for PendingChunkReader<R> {
+        fn poll_read(
+            mut self: std::pin::Pin<&mut Self>,
+            cx: &mut std::task::Context<'_>,
+            buf: &mut tokio::io::ReadBuf<'_>,
+        ) -> std::task::Poll<std::io::Result<()>> {
+            if self.pending_next {
+                self.pending_next = false;
+                cx.waker().wake_by_ref();
+                return std::task::Poll::Pending;
+            }
+            self.pending_next = true;
+            let cap = self.chunk.min(buf.remaining());
+            let mut scratch = vec![0u8; cap];
+            let mut inner_buf = tokio::io::ReadBuf::new(&mut scratch);
+            match std::pin::Pin::new(&mut self.inner).poll_read(cx, &mut inner_buf) {
+                std::task::Poll::Ready(Ok(())) => {
+                    buf.put_slice(inner_buf.filled());
+                    std::task::Poll::Ready(Ok(()))
+                }
+                other => other,
+            }
+        }
+    }
+
+    fn patterned_payload(size: usize, seed: u8) -> Vec<u8> {
+        (0..size)
+            .map(|i| ((i as u64).wrapping_mul(2_654_435_761).wrapping_add(seed as u64) >> 3) as u8)
+            .collect()
+    }
+
+    /// Root-cause regression for the multipart compressed GET truncation: a
+    /// `Poll::Pending` in the middle of a block payload must not drop the bytes
+    /// already consumed. Before the resumable payload state, the decoder reset
+    /// `compressed_read` on every re-poll and surfaced
+    /// `LZ4 error: ERROR_frameType_unknown` mid-stream.
+    #[tokio::test]
+    async fn test_decompress_reader_survives_pending_mid_payload() {
+        let data = patterned_payload(100 * 1024, 7);
+        let mut compress_reader =
+            CompressReader::with_block_size(Cursor::new(data.clone()), 8192, CompressionAlgorithm::default());
+        let mut compressed = Vec::new();
+        compress_reader.read_to_end(&mut compressed).await.unwrap();
+
+        for chunk in [1usize, 3, 7, 8, 17, 1000, 8192] {
+            let inner = PendingChunkReader::new(Cursor::new(compressed.clone()), chunk);
+            let mut decompress_reader = DecompressReader::new(inner, CompressionAlgorithm::default());
+            let mut decompressed = Vec::new();
+            decompress_reader.read_to_end(&mut decompressed).await.unwrap();
+            assert_eq!(decompressed, data, "pending-chunked decode must be byte-exact for chunk={chunk}");
+        }
+    }
+
+    /// Two independently compressed streams concatenated back to back — the
+    /// on-disk shape of a compressed multipart object — must decode across the
+    /// stream boundary even when every poll can suspend mid-block.
+    #[tokio::test]
+    async fn test_decompress_reader_survives_pending_across_concatenated_streams() {
+        let part1 = patterned_payload(64 * 1024, 7);
+        let part2 = patterned_payload(24 * 1024, 61);
+
+        let mut stored = Vec::new();
+        for part in [&part1, &part2] {
+            let mut compress_reader =
+                CompressReader::with_block_size(Cursor::new(part.clone()), 8192, CompressionAlgorithm::default());
+            let mut compressed = Vec::new();
+            compress_reader.read_to_end(&mut compressed).await.unwrap();
+            stored.extend_from_slice(&compressed);
+        }
+
+        let mut expected = part1;
+        expected.extend_from_slice(&part2);
+
+        for chunk in [1usize, 5, 8, 13, 4096] {
+            let inner = PendingChunkReader::new(Cursor::new(stored.clone()), chunk);
+            let mut decompress_reader = DecompressReader::new(inner, CompressionAlgorithm::default());
+            let mut decompressed = Vec::new();
+            decompress_reader.read_to_end(&mut decompressed).await.unwrap();
+            assert_eq!(
+                decompressed, expected,
+                "concatenated part streams must decode byte-exact for chunk={chunk}"
+            );
+        }
+    }
+
+    /// After the first stream error, every further poll must keep failing.
+    /// Without the sticky poison a retrying caller would restart at the header
+    /// phase and read the truncated tail as a clean EOF — converting a hard
+    /// error into a silently short body.
+    #[tokio::test]
+    async fn test_decompress_reader_error_is_sticky() {
+        let data = patterned_payload(32 * 1024, 7);
+        let mut compress_reader = CompressReader::with_block_size(Cursor::new(data), 8192, CompressionAlgorithm::default());
+        let mut compressed = Vec::new();
+        compress_reader.read_to_end(&mut compressed).await.unwrap();
+        compressed.truncate(compressed.len() - 3);
+
+        let mut decompress_reader = DecompressReader::new(Cursor::new(compressed), CompressionAlgorithm::default());
+        let mut out = Vec::new();
+        let first = decompress_reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("truncated payload must error");
+        assert_eq!(first.kind(), std::io::ErrorKind::UnexpectedEof);
+
+        let mut retry = Vec::new();
+        let second = decompress_reader
+            .read_to_end(&mut retry)
+            .await
+            .expect_err("a poll after the first error must not turn into a clean EOF");
+        assert_eq!(second.kind(), std::io::ErrorKind::InvalidData);
+        assert!(retry.is_empty(), "no bytes may be produced after the stream failed");
+    }
+
+    /// A stream cut off in the middle of a block payload must fail with a clean
+    /// UnexpectedEof instead of decoding a short buffer.
+    #[tokio::test]
+    async fn test_decompress_reader_truncated_payload_is_unexpected_eof() {
+        let data = patterned_payload(32 * 1024, 7);
+        let mut compress_reader = CompressReader::with_block_size(Cursor::new(data), 8192, CompressionAlgorithm::default());
+        let mut compressed = Vec::new();
+        compress_reader.read_to_end(&mut compressed).await.unwrap();
+
+        compressed.truncate(compressed.len() - 3);
+        let mut decompress_reader = DecompressReader::new(Cursor::new(compressed), CompressionAlgorithm::default());
+        let mut out = Vec::new();
+        let err = decompress_reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("truncated payload must error");
+        assert_eq!(err.kind(), std::io::ErrorKind::UnexpectedEof);
+    }
+
+    /// A stream cut off in the middle of a block header must fail with a clean
+    /// UnexpectedEof instead of parsing a garbage header.
+    #[tokio::test]
+    async fn test_decompress_reader_truncated_header_is_unexpected_eof() {
+        let data = patterned_payload(12 * 1024, 7);
+        let mut compress_reader = CompressReader::with_block_size(Cursor::new(data), 8192, CompressionAlgorithm::default());
+        let mut compressed = Vec::new();
+        compress_reader.read_to_end(&mut compressed).await.unwrap();
+
+        // Keep the first full block plus 3 bytes of the next header.
+        let ln = (compressed[1] as usize) | ((compressed[2] as usize) << 8) | ((compressed[3] as usize) << 16);
+        let first_block_end = 8 + ln;
+        assert!(compressed.len() > first_block_end, "fixture must contain more than one block");
+        compressed.truncate(first_block_end + 3);
+
+        let mut decompress_reader = DecompressReader::new(Cursor::new(compressed), CompressionAlgorithm::default());
+        let mut out = Vec::new();
+        let err = decompress_reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("truncated header must error");
+        assert_eq!(err.kind(), std::io::ErrorKind::UnexpectedEof);
+    }
+
    // Regression: a corrupted block whose 24-bit length field is < 16 must not panic.
    // Header layout (HEADER_LEN = 8): [type, len_lo, len_mid, len_hi, crc0..crc3], then `len`
    // bytes of block body. Pre-fix, poll_read sliced `compressed_buf[0..16]` unconditionally,
@@ -518,6 +749,85 @@ mod tests {
        assert_eq!(res.unwrap_err().kind(), std::io::ErrorKind::InvalidData);
    }

+    // Header-level fail-closed matrix, built by hand so the decoder is exercised against bytes no
+    // encoder in this crate can produce. Header layout (HEADER_LEN = 8):
+    // [type, len_lo, len_mid, len_hi, crc0..crc3], then `len` body bytes = uvarint(plain_len) + data.
+    #[tokio::test]
+    async fn test_decompress_reader_header_validation_matrix() {
+        // Build a block whose body is `uvarint(plain.len()) + plain` (i.e. the
+        // COMPRESS_TYPE_UNCOMPRESSED shape), with the header CRC taken over the plaintext exactly
+        // like the production writer does.
+        fn build_raw_block(typ: u8, plain: &[u8], len_override: Option<usize>) -> Vec<u8> {
+            let crc = {
+                let mut hasher = crc_fast::Digest::new(crc_fast::CrcAlgorithm::Crc32IsoHdlc);
+                hasher.update(plain);
+                hasher.finalize() as u32
+            };
+            let mut uvarint_buf = [0u8; 10];
+            let int_len = put_uvarint(&mut uvarint_buf[..], plain.len() as u64);
+            let body_len = int_len + plain.len();
+            let len = len_override.unwrap_or(body_len);
+
+            let mut out = Vec::with_capacity(HEADER_LEN + body_len);
+            out.push(typ);
+            out.push((len & 0xFF) as u8);
+            out.push(((len >> 8) & 0xFF) as u8);
+            out.push(((len >> 16) & 0xFF) as u8);
+            out.extend_from_slice(&crc.to_le_bytes());
+            out.extend_from_slice(&uvarint_buf[..int_len]);
+            out.extend_from_slice(plain);
+            out
+        }
+
+        let plain = b"uncompressed passthrough payload";
+
+        // (a) A well-formed uncompressed block decodes to the plaintext verbatim.
+        let mut out = Vec::new();
+        DecompressReader::new(
+            Cursor::new(build_raw_block(COMPRESS_TYPE_UNCOMPRESSED, plain, None)),
+            CompressionAlgorithm::default(),
+        )
+        .read_to_end(&mut out)
+        .await
+        .expect("a well-formed uncompressed block must decode");
+        assert_eq!(out.as_slice(), plain.as_slice());
+
+        // (b) An unknown block type must be rejected instead of being treated as passthrough.
+        let mut out = Vec::new();
+        let err = DecompressReader::new(Cursor::new(build_raw_block(0x7E, plain, None)), CompressionAlgorithm::default())
+            .read_to_end(&mut out)
+            .await
+            .expect_err("unknown compression type must error");
+        assert_eq!(err.kind(), std::io::ErrorKind::InvalidData);
+        assert!(err.to_string().contains("Unknown compression type"), "got: {err}");
+
+        // (c) A zero-length block would stall the decoder, so it must be rejected up front.
+        let mut out = Vec::new();
+        let err = DecompressReader::new(
+            Cursor::new(build_raw_block(COMPRESS_TYPE_UNCOMPRESSED, plain, Some(0))),
+            CompressionAlgorithm::default(),
+        )
+        .read_to_end(&mut out)
+        .await
+        .expect_err("zero-length block must error");
+        assert_eq!(err.kind(), std::io::ErrorKind::InvalidData);
+        assert!(err.to_string().contains("Invalid compressed block length"), "got: {err}");
+
+        // (d) A block that decodes to zero plaintext bytes must be rejected: the
+        // writer never emits empty blocks, and an empty decode surfacing as
+        // Ready(Ok) with no bytes would read as EOF and silently truncate.
+        let mut out = Vec::new();
+        let err = DecompressReader::new(
+            Cursor::new(build_raw_block(COMPRESS_TYPE_UNCOMPRESSED, b"", None)),
+            CompressionAlgorithm::default(),
+        )
+        .read_to_end(&mut out)
+        .await
+        .expect_err("empty block must error");
+        assert_eq!(err.kind(), std::io::ErrorKind::InvalidData);
+        assert!(err.to_string().contains("Empty compressed block"), "got: {err}");
+    }
+
    // Directly exercises the length-prefix guard: an unterminated varint (all continuation bytes)
    // makes `uvarint` return 0, which must be rejected as an invalid length prefix.
    #[tokio::test]
@@ -24,12 +24,17 @@ pin_project! {
        #[pin]
        pub inner: R,
        remaining: i64,
+        scratch: Vec<u8>,
    }
 }

 impl<R> HardLimitReader<R> {
    pub fn new(inner: R, limit: i64) -> Self {
-        HardLimitReader { inner, remaining: limit }
+        HardLimitReader {
+            inner,
+            remaining: limit,
+            scratch: Vec::new(),
+        }
    }
 }

@@ -37,19 +42,21 @@ impl<R> AsyncRead for HardLimitReader<R>
 where
    R: AsyncRead,
 {
-    fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut ReadBuf<'_>) -> Poll<Result<()>> {
-        if self.remaining < 0 {
+    fn poll_read(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut ReadBuf<'_>) -> Poll<Result<()>> {
+        let mut this = self.project();
+        if *this.remaining < 0 {
            return Poll::Ready(Err(Error::other("input provided more bytes than specified")));
        }
-        let original_filled = buf.filled().len();
-        if self.remaining == 0 {
+        if buf.remaining() == 0 {
+            return Poll::Ready(Ok(()));
+        }
+        if *this.remaining == 0 {
            let mut discard = [0u8; 8192];
            let mut discard_buf = ReadBuf::new(&mut discard);
-            return match self.as_mut().project().inner.poll_read(cx, &mut discard_buf) {
+            return match this.inner.as_mut().poll_read(cx, &mut discard_buf) {
                Poll::Pending => Poll::Pending,
                Poll::Ready(Ok(())) => {
                    if discard_buf.filled().is_empty() {
-                        debug_assert_eq!(buf.filled().len(), original_filled);
                        Poll::Ready(Ok(()))
                    } else {
                        Poll::Ready(Err(Error::other("input provided more bytes than specified")))
@@ -58,30 +65,46 @@ where
                Poll::Ready(Err(err)) => Poll::Ready(Err(err)),
            };
        }
-        // Save the initial length
-        let before = original_filled;

-        // Poll the inner reader
-        let this = self.as_mut().project();
-        let poll = this.inner.poll_read(cx, buf);
-
-        if let Poll::Ready(Ok(())) = &poll {
-            let after = buf.filled().len();
-            let read = (after - before) as i64;
-            if read == 0 && *this.remaining > 0 {
-                return Poll::Ready(Err(Error::new(
-                    std::io::ErrorKind::UnexpectedEof,
-                    IncompleteBody {
-                        remaining: *this.remaining,
-                    },
-                )));
+        let remaining = match usize::try_from(*this.remaining) {
+            Ok(remaining) => remaining,
+            Err(_) => usize::MAX,
+        };
+        let allowed = remaining.min(buf.remaining());
+        let read = if allowed == buf.remaining() {
+            let before = buf.filled().len();
+            match this.inner.as_mut().poll_read(cx, buf) {
+                Poll::Pending => return Poll::Pending,
+                Poll::Ready(Err(err)) => return Poll::Ready(Err(err)),
+                Poll::Ready(Ok(())) => buf.filled().len() - before,
            }
-            *this.remaining -= read;
-            if *this.remaining < 0 {
-                return Poll::Ready(Err(Error::other("input provided more bytes than specified")));
+        } else {
+            this.scratch.resize(allowed, 0);
+            let mut scratch_buf = ReadBuf::new(&mut this.scratch[..allowed]);
+            match this.inner.as_mut().poll_read(cx, &mut scratch_buf) {
+                Poll::Pending => return Poll::Pending,
+                Poll::Ready(Err(err)) => return Poll::Ready(Err(err)),
+                Poll::Ready(Ok(())) => {
+                    let read = scratch_buf.filled().len();
+                    buf.put_slice(scratch_buf.filled());
+                    read
+                }
            }
+        };
+        if read == 0 {
+            return Poll::Ready(Err(Error::new(
+                std::io::ErrorKind::UnexpectedEof,
+                IncompleteBody {
+                    remaining: *this.remaining,
+                },
+            )));
        }
-        poll
+        let read = match i64::try_from(read) {
+            Ok(read) => read,
+            Err(_) => return Poll::Ready(Err(Error::other("read count exceeds i64::MAX"))),
+        };
+        *this.remaining -= read;
+        Poll::Ready(Ok(()))
    }
 }

@@ -140,7 +163,12 @@ mod tests {
        assert!(err.is_some());

        let err = err.unwrap();
-        assert_eq!(err.kind(), std::io::ErrorKind::Other);
+        assert_eq!(err.kind(), std::io::ErrorKind::UnexpectedEof);
+        assert!(
+            err.get_ref()
+                .and_then(|source| source.downcast_ref::<std::io::Error>())
+                .is_some_and(|source| source.to_string().contains("more bytes than specified"))
+        );
    }

    #[tokio::test]
@@ -155,6 +183,17 @@ mod tests {
        assert_eq!(&buf, data);
    }

+    #[tokio::test]
+    async fn test_hardlimit_reader_zero_capacity_read_does_not_consume_input() {
+        let mut reader = HardLimitReader::new(BufReader::new(&b"abc"[..]), 3);
+        let mut empty = [];
+
+        assert_eq!(reader.read(&mut empty).await.expect("zero-capacity read should succeed"), 0);
+        let mut out = Vec::new();
+        reader.read_to_end(&mut out).await.expect("input should remain readable");
+        assert_eq!(out, b"abc");
+    }
+
    #[tokio::test]
    async fn test_hardlimit_reader_short_input_returns_unexpected_eof() {
        let data = b"abc";
@@ -195,4 +234,18 @@ mod tests {
        assert_eq!(err.kind(), std::io::ErrorKind::Other);
        assert!(err.to_string().contains("more bytes than specified"));
    }
+
+    #[tokio::test]
+    async fn test_hardlimit_reader_caps_each_read_before_reporting_extra_bytes() {
+        let mut reader = HardLimitReader::new(BufReader::new(&b"abcdef"[..]), 3);
+        let mut out = Vec::new();
+
+        let err = reader
+            .read_to_end(&mut out)
+            .await
+            .expect_err("bytes beyond the declared limit must be rejected");
+
+        assert_eq!(out, b"abc");
+        assert!(err.to_string().contains("more bytes than specified"));
+    }
 }
@@ -138,6 +138,12 @@ impl std::fmt::Display for InternodeHttpErrorKind {
    }
 }

+#[derive(thiserror::Error, Debug, Clone, Copy, Eq, PartialEq)]
+#[error("internode body stalled for {timeout:?}")]
+pub struct BodyStalled {
+    pub timeout: Duration,
+}
+
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct InternodeHttpRequestContext {
    method: String,
@@ -271,6 +277,10 @@ pub fn internode_http_timeout_error(method: &Method, url: &str) -> io::Error {
    internode_kind_error(method, url, internode_rpc_operation(url), InternodeHttpErrorKind::ConnectTimeout)
 }

+fn body_stalled_error(stall_timeout: Duration) -> io::Error {
+    Error::new(io::ErrorKind::TimedOut, BodyStalled { timeout: stall_timeout })
+}
+
 /// Clone an internode HTTP I/O error while retaining its structured classification.
 ///
 /// The underlying transport source is intentionally omitted because it is not
@@ -1085,10 +1095,7 @@ impl AsyncRead for HttpReader {
                    );
                    record_internode_stall_timeout(*this.track_internode_metrics, *this.internode_operation);
                    record_internode_error(*this.track_internode_metrics, *this.internode_operation);
-                    Poll::Ready(Err(Error::new(
-                        io::ErrorKind::TimedOut,
-                        "HttpReader stall timeout: no data received before deadline",
-                    )))
+                    Poll::Ready(Err(body_stalled_error(stall_timeout)))
                } else {
                    Poll::Pending
                }
@@ -1217,10 +1224,7 @@ impl ChunkReader for HttpChunkReader {
                        );
                        record_internode_stall_timeout(*this.track_internode_metrics, *this.internode_operation);
                        record_internode_error(*this.track_internode_metrics, *this.internode_operation);
-                        return Poll::Ready(Err(Error::new(
-                            io::ErrorKind::TimedOut,
-                            "HttpReader stall timeout: no data received before deadline",
-                        )));
+                        return Poll::Ready(Err(body_stalled_error(stall_timeout)));
                    }
                    return Poll::Pending;
                }
@@ -2379,6 +2383,46 @@ mod tests {
            Err(err) => err,
        };
        assert_eq!(err.kind(), io::ErrorKind::TimedOut);
+        let stalled = err
+            .get_ref()
+            .and_then(|source| source.downcast_ref::<BodyStalled>())
+            .expect("stall timeout should retain typed body-stalled source");
+        assert_eq!(stalled.timeout, Duration::from_millis(20));
+
+        handle.abort();
+    }
+
+    #[tokio::test]
+    async fn http_chunk_reader_stall_timeout_retains_typed_source() {
+        let state = TestState::default();
+        let Some((base_url, handle)) = start_test_server(state).await else {
+            return;
+        };
+        let url = base_url.replace("/stream", "/stall");
+        let mut reader =
+            HttpChunkReader::new_with_stall_timeout(url, Method::GET, HeaderMap::new(), None, Some(Duration::from_millis(20)))
+                .await
+                .expect("chunk reader should open");
+
+        let first = std::future::poll_fn(|cx| Pin::new(&mut reader).poll_read_chunk(cx, 64))
+            .await
+            .expect("initial body chunk should arrive")
+            .expect("initial body chunk should not be EOF");
+        assert_eq!(first, b"hello"[..]);
+
+        let err = tokio::time::timeout(
+            Duration::from_secs(1),
+            std::future::poll_fn(|cx| Pin::new(&mut reader).poll_read_chunk(cx, 64)),
+        )
+        .await
+        .expect("stall timeout should wake chunk reader")
+        .expect_err("chunk reader should return a timeout error");
+        assert_eq!(err.kind(), io::ErrorKind::TimedOut);
+        let stalled = err
+            .get_ref()
+            .and_then(|source| source.downcast_ref::<BodyStalled>())
+            .expect("chunk stall timeout should retain typed body-stalled source");
+        assert_eq!(stalled.timeout, Duration::from_millis(20));

        handle.abort();
    }
@@ -102,7 +102,7 @@ bytes.workspace = true
 hex-simd.workspace = true

 [dev-dependencies]
-tracing-subscriber = { workspace = true, features = ["env-filter", "time"] }
+tracing-subscriber = { workspace = true, features = ["json", "env-filter", "time"] }
 serial_test = { workspace = true }
 temp-env = { workspace = true }
 tempfile = { workspace = true }
@@ -65,6 +65,7 @@ const LOG_SUBSYSTEM_FOLDER: &str = "folder";
 const LOG_SUBSYSTEM_LIFECYCLE: &str = "lifecycle";
 const LOG_SUBSYSTEM_HEAL: &str = "heal";
 const EVENT_SCANNER_FOLDER_STATE: &str = "scanner_folder_state";
+const EVENT_SCANNER_METADATA_CORRUPT: &str = "scanner_metadata_corrupt";
 const EVENT_SCANNER_LIFECYCLE_ACTION: &str = "scanner_lifecycle_action";
 const EVENT_SCANNER_HEAL_ADMISSION: &str = "scanner_heal_admission";
 const EVENT_SCANNER_ALERT_STATE: &str = "scanner_alert_state";
@@ -2154,17 +2155,34 @@ impl FolderScanner {
                            self.record_failed(&item.path);

                            if should_log_failed_object(into.failed_objects) {
-                                warn!(
-                                    target: "rustfs::scanner::folder",
-                                    event = EVENT_SCANNER_FOLDER_STATE,
-                                    component = LOG_COMPONENT_SCANNER,
-                                    subsystem = LOG_SUBSYSTEM_FOLDER,
-                                    path = %item.path,
-                                    failed_objects = into.failed_objects,
-                                    state = "get_size_failed",
-                                    error = %e,
-                                    "Scanner folder failed to get object size"
-                                );
+                                if let GetSizeFailureAction::HealMetadata { object } = &failure_action {
+                                    error!(
+                                        target: "rustfs::scanner::folder",
+                                        event = EVENT_SCANNER_METADATA_CORRUPT,
+                                        component = LOG_COMPONENT_SCANNER,
+                                        subsystem = LOG_SUBSYSTEM_FOLDER,
+                                        drive = %self.local_disk.path().display(),
+                                        bucket = %item.bucket,
+                                        object = %object,
+                                        metadata_path = %item.path,
+                                        failed_objects = into.failed_objects,
+                                        state = "metadata_corrupt",
+                                        error = %e,
+                                        "Scanner detected corrupt object metadata"
+                                    );
+                                } else {
+                                    warn!(
+                                        target: "rustfs::scanner::folder",
+                                        event = EVENT_SCANNER_FOLDER_STATE,
+                                        component = LOG_COMPONENT_SCANNER,
+                                        subsystem = LOG_SUBSYSTEM_FOLDER,
+                                        path = %item.path,
+                                        failed_objects = into.failed_objects,
+                                        state = "get_size_failed",
+                                        error = %e,
+                                        "Scanner folder failed to get object size"
+                                    );
+                                }
                            }
                        }

@@ -3054,12 +3072,59 @@ mod tests {
    use crate::{DiskOption, Endpoint, STORAGE_FORMAT_FILE, TierStats, new_disk, storageclass};
    use rustfs_filemeta::{FileInfo, FileMeta};
    use serial_test::serial;
+    use std::io::Write;
    #[cfg(unix)]
    use std::os::unix::fs::{PermissionsExt, symlink};
+    use std::sync::Mutex;
    use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
    use temp_env::{with_var, with_var_unset};
+    use tracing_subscriber::fmt::MakeWriter;
    use uuid::Uuid;

+    #[derive(Clone, Default)]
+    struct CapturedLogs {
+        buffer: Arc<Mutex<Vec<u8>>>,
+    }
+
+    struct CapturedLogWriter {
+        buffer: Arc<Mutex<Vec<u8>>>,
+    }
+
+    impl CapturedLogs {
+        fn contents(&self) -> String {
+            let buffer = self
+                .buffer
+                .lock()
+                .expect("captured logs mutex should not be poisoned")
+                .clone();
+            String::from_utf8(buffer).expect("captured logs should be valid UTF-8")
+        }
+    }
+
+    impl Write for CapturedLogWriter {
+        fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
+            self.buffer
+                .lock()
+                .expect("captured logs mutex should not be poisoned")
+                .extend_from_slice(buf);
+            Ok(buf.len())
+        }
+
+        fn flush(&mut self) -> std::io::Result<()> {
+            Ok(())
+        }
+    }
+
+    impl<'a> MakeWriter<'a> for CapturedLogs {
+        type Writer = CapturedLogWriter;
+
+        fn make_writer(&'a self) -> Self::Writer {
+            CapturedLogWriter {
+                buffer: Arc::clone(&self.buffer),
+            }
+        }
+    }
+
    #[test]
    fn scanner_size_summary_application_saturates_usage_counters() {
        let target = "arn:minio:replication::target".to_string();
@@ -4542,9 +4607,19 @@ mod tests {
        assert!(budget.entries_visited() >= 1);
    }

-    #[tokio::test]
+    #[tokio::test(flavor = "current_thread")]
    #[serial]
    async fn test_scan_folder_corrupt_xl_meta_stops_erasure_data_dir_descent() {
+        let logs = CapturedLogs::default();
+        let subscriber = tracing_subscriber::fmt()
+            .json()
+            .with_max_level(tracing::Level::ERROR)
+            .with_writer(logs.clone())
+            .with_ansi(false)
+            .without_time()
+            .finish();
+        let _subscriber_guard = tracing::subscriber::set_default(subscriber);
+
        let (mut scanner, temp_dir) = build_test_scanner().await;
        let _guard = TestGuard::new(60, 100, &mut scanner, temp_dir.clone());

@@ -4596,6 +4671,30 @@ mod tests {
        assert!(!budget.budget_elapsed());
        assert_eq!(budget.reason(), None);

+        let captured = logs.contents();
+        assert!(
+            !captured.contains("failed to check XL2 v1 format"),
+            "the context-free filemeta parser error must not be emitted"
+        );
+        let events = captured
+            .lines()
+            .map(|line| serde_json::from_str::<serde_json::Value>(line).expect("captured scanner log should be valid JSON"))
+            .filter(|line| line["fields"]["event"] == EVENT_SCANNER_METADATA_CORRUPT)
+            .collect::<Vec<_>>();
+        assert_eq!(
+            events.len(),
+            1,
+            "one corrupt metadata observation must emit one scanner-owned diagnostic event"
+        );
+        let fields = &events[0]["fields"];
+        assert_eq!(fields["component"], LOG_COMPONENT_SCANNER);
+        assert_eq!(fields["subsystem"], LOG_SUBSYSTEM_FOLDER);
+        assert_eq!(fields["drive"], temp_dir.to_string_lossy().as_ref());
+        assert_eq!(fields["bucket"], "bucket");
+        assert_eq!(fields["object"], "object");
+        assert_eq!(fields["metadata_path"], metadata_path.to_string_lossy().as_ref());
+        assert_eq!(fields["state"], "metadata_corrupt");
+
        let retry_budget = ScannerCycleBudget::new_with_progress_tracking(
            &parent,
            crate::scanner_budget::ScannerCycleBudgetConfig {
@@ -3849,17 +3849,6 @@ impl ScannerIODisk for Disk {
        let fivs = match meta.get_file_info_versions(item.bucket.as_str(), item.object_path().as_str(), false) {
            Ok(versions) => versions,
            Err(e) => {
-                error!(
-                    target: "rustfs::scanner::io",
-                    event = EVENT_SCANNER_DISK_BUCKET_STATE,
-                    component = LOG_COMPONENT_SCANNER,
-                    subsystem = LOG_SUBSYSTEM_IO,
-                    bucket = %item.bucket,
-                    object = %item.object_path(),
-                    state = "file_info_versions_failed",
-                    error = %e,
-                    "Scanner disk bucket failed to resolve file info versions"
-                );
                return Err(scanner_metadata_corrupt_error(
                    format!("failed to resolve file info versions: {e}"),
                    &item.bucket,
@@ -4262,6 +4251,7 @@ mod tests {
            .delete_bucket(&bucket, &DeleteBucketOptions::default())
            .await
            .expect("bucket should be removed from the first pool only");
+        init_bucket_metadata_sys_for_scanner_tests(store.clone()).await;

        let ctx = CancellationToken::new();
        let budget = ScannerCycleBudget::new(&ctx, ScannerCycleBudgetConfig::default());
@@ -50,6 +50,14 @@ pub const SUFFIX_SOURCE_DELETEMARKER: &str = "source-deletemarker";
 pub const SUFFIX_SOURCE_PROXY_REQUEST: &str = "source-proxy-request";
 pub const SUFFIX_SOURCE_REPLICATION_REQUEST: &str = "source-replication-request";
 pub const SUFFIX_SOURCE_REPLICATION_CHECK: &str = "source-replication-check";
+// LWW timestamps for replicated tag/retention/legal-hold modifications. MinIO
+// declares these with mixed case (internal/http/headers.go:
+// X-Minio-Source-Replication-Tagging-Timestamp / -Retention-Timestamp /
+// -LegalHold-Timestamp); HTTP header names compare case-insensitively, so the
+// lowercase suffix forms interoperate. Values are RFC3339 on the wire.
+pub const SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP: &str = "source-replication-tagging-timestamp";
+pub const SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP: &str = "source-replication-retention-timestamp";
+pub const SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP: &str = "source-replication-legalhold-timestamp";
 pub const SUFFIX_REPLICATION_SSEC_CRC: &str = "replication-ssec-crc";

 /// Returns true if the key is object-encryption metadata understood by RustFS or MinIO.
@@ -196,6 +204,27 @@ mod tests {
        assert_eq!(get_object_encryption_original_size(&metadata).expect("valid size"), Some(42));
    }

+    #[test]
+    fn replication_timestamp_headers_match_minio_wire_names() {
+        let mut headers = HeaderMap::new();
+        insert_header(&mut headers, SUFFIX_SOURCE_REPLICATION_TAGGING_TIMESTAMP, "2026-01-02T03:04:05Z");
+        insert_header(&mut headers, SUFFIX_SOURCE_REPLICATION_RETENTION_TIMESTAMP, "2026-01-02T03:04:06Z");
+        insert_header(&mut headers, SUFFIX_SOURCE_REPLICATION_LEGALHOLD_TIMESTAMP, "2026-01-02T03:04:07Z");
+
+        // The exact names MinIO's object-api-options.go reads (its Get()
+        // canonicalizes case, so a case-insensitive match is wire-equivalent).
+        for name in [
+            "X-Minio-Source-Replication-Tagging-Timestamp",
+            "X-Minio-Source-Replication-Retention-Timestamp",
+            "X-Minio-Source-Replication-LegalHold-Timestamp",
+            "x-rustfs-source-replication-tagging-timestamp",
+            "x-rustfs-source-replication-retention-timestamp",
+            "x-rustfs-source-replication-legalhold-timestamp",
+        ] {
+            assert!(headers.contains_key(name), "replication timestamp header {name} must be written");
+        }
+    }
+
    #[test]
    fn test_get_header() {
        let mut headers = HeaderMap::new();
@@ -659,9 +659,6 @@ mod test {
        // Port should be in valid range (u16 max is always <= 65535)
        assert!(port1 > 0);
        assert!(port2 > 0);
-
-        // Different calls should typically return different ports
-        assert_ne!(port1, port2);
    }

    #[test]
@@ -33,6 +33,7 @@ for later deletion.
 - `tonic-013-status-render` peer RPC failure classification: internode failures that reach a node only as text (a peer's error_info payload, a status flattened through format!) are classified by matching the rendering of an Unavailable gRPC status. Releases up to 1.0.0-alpha.38 shipped tonic 0.13, which rendered that status as "status: Unavailable, message: ..."; tonic 0.14 renders it as "code: 'The service is currently unavailable', message: ...". Both forms are matched so an older peer's relayed text still marks an unreachable peer offline. Remove the tonic 0.13 form after the minimum supported RustFS peer version ships tonic 0.14 or later.
 - `rustfs-5063` pre-beta.9 Local KMS recovery: persisted Local KMS configs from beta.8 and earlier predate the explicit insecure-development flag, and encrypted key files use the legacy SHA-256 KDF. Remove the config fallback after supported upgrades have rewritten or explicitly resaved all pre-beta.9 configs with the development-default field, and remove the legacy KDF after supported upgrades have rewritten all pre-beta.9 Local KMS key files with explicit at-rest protection.
 - `sse-local-dek-json-v1` legacy local SSE DEK decoding: releases before the JSON envelope wrote wrapped DEKs as `base64(nonce):base64(ciphertext)`, so readers retain that decoder while all new writes use the versioned JSON envelope. Remove the colon decoder after the minimum supported direct-upgrade release writes JSON envelopes and migration tooling has rewritten every retained legacy object.
+- `multipart-compression-default-off-window` staged multipart disk-compression rollout: releases before the resumable legacy decompressor fail transient reads of compressed objects under mid-payload suspension, so multipart uploads advertise the compression marker only when RUSTFS_COMPRESSION_MULTIPART_ENABLED is set in addition to RUSTFS_COMPRESSION_ENABLED, keeping rolling upgrades from creating new compressed multipart objects while pre-fix nodes may still serve reads. Flip the default to enabled (and retire the extra switch) after the minimum supported direct-upgrade release ships the resumable decompressor.

 ## Review Checklist

@@ -111,7 +111,7 @@ inventory. Generic function-local names such as `CACHE`, `LOCK`, `INIT`, and
 | `GET_OBJECT_BUFFER_THRESHOLD_WARNED`, `GET_READER_STREAM_BUFFER_SIZE_OVERRIDE`, function-local `ENABLED`, `OBJECT_SEEK_SUPPORT_THRESHOLD`, `OBJECT_SEEK_SUPPORT_CONCURRENCY_THRESHOLDS` | `rustfs/src/app/object_usecase.rs` | Cache or constant / owner-local cache | Object GET/seek tuning caches and warning guards stay private to object usecase helpers. |
 | `SUPPORTED_HEADERS` | `rustfs/src/storage/options.rs` | Cache or constant / owner-local constant | Supported-header lookup state stays private to storage option parsing. |
 | `AUDIT_TARGET_SPECS`, `NOTIFICATION_TARGET_SPECS` | `rustfs/src/admin/handlers/audit.rs`, `rustfs/src/admin/handlers/event.rs`, `rustfs/src/admin/handlers/plugins_instances.rs` | Cache or constant / owner-local constant | Admin target descriptor tables stay private to their handler owners. |
-| `SITE_REPLICATION_PEER_CLIENT`, `SITE_REPLICATION_STATE_LOCK` | `rustfs/src/admin/handlers/site_replication.rs` | Process-global owner-local cache / guard | Site-replication peer client cache and state lock stay private to site-replication handlers. |
+| `SITE_REPLICATION_PEER_CLIENT` | `rustfs/src/admin/handlers/site_replication.rs` | Process-global owner-local cache | Site-replication peer client cache stays private to site-replication handlers. The state RMW transaction holds no process-local mutex — see `rustfs/src/admin/site_replication_state.rs`. |
 | `AUDIT_MODULE_ENABLED`, `NOTIFY_MODULE_ENABLED`, `PERSISTED_NOTIFY_MODULE_ENABLED`, `PERSISTED_AUDIT_MODULE_ENABLED`, `PERSISTED_MODULE_SWITCH_CONFIGURED` | `rustfs/src/server/audit.rs`, `rustfs/src/server/event.rs`, `rustfs/src/server/module_switch.rs` | Process-global owner-local toggles | Audit/notify module snapshots stay private to the server module switch owners. |
 | `DELETE_TAIL_TOTAL`, `DELETE_CLEANUP_TOTAL`, `DELETE_REPLICATION_TOTAL`, `DELETE_NOTIFY_TOTAL` | `rustfs/src/delete_tail_activity.rs` | Process-global owner-local counters | Delete-tail activity counters stay private behind delete-tail activity helpers. |
 | `EMBEDDED_SERVER_STARTED` | `rustfs/src/startup_lifecycle.rs` | Process-global owner-local guard | Embedded startup single-start protection stays private to startup lifecycle. |
@@ -61,17 +61,17 @@ catalog extension.

 | Area | Status | Covered behavior |
 |---|---|---|
-| Catalog config | Supported | `GET /v1/config` advertises RustFS catalog defaults and route capabilities. |
+| Catalog config | Supported | `GET /v1/config` advertises RustFS catalog defaults and only the supported OpenAPI REST paths in `endpoints`. RustFS administration, maintenance, migration, diagnostics, refs, and metadata-location extensions remain available but are not presented as standard Iceberg REST endpoints. |
 | Table bucket discovery | Supported | `PUT` and `GET /v1/buckets/{warehouse}` enable and inspect table bucket state. |
 | Namespaces | Supported | Create, list, load, existence check, and drop namespace routes are registered on both catalog prefixes. List responses support Iceberg REST `pageSize`/`pageToken` pagination with context-bound tokens and bounded catalog-store reads. Namespace identifiers are limited to 512 ASCII characters so persisted paths and stateless continuation tokens remain bounded. |
-| Tables | Supported | Create, register, list, load, existence check, commit, metadata-location get/update, and drop table routes are registered on both catalog prefixes. Table and view listings support Iceberg REST `pageSize`/`pageToken` pagination with context-bound tokens and bounded catalog-store reads. |
-| Commit CAS | Supported | Single-table commits validate base metadata, expected version token, referenced object existence, warehouse scope, and Iceberg commit requirements before advancing the current metadata pointer. Standard commits preserve the normal commit-token file name and use an immutable-table-scoped fallback when rename followed by source-name reuse would otherwise collide at the same generation and commit ID. |
+| Tables | Supported | Create, register, list, load, existence check, commit, metadata-location get/update, and drop table routes are registered on both catalog prefixes. Table and view listings support Iceberg REST `pageSize`/`pageToken` pagination with context-bound tokens and bounded catalog-store reads. Commit identifiers must match the URL resource; unknown requirements, updates, and snapshot operations fail as bad requests; staged create, register overwrite, purge-on-drop, and v3-only encryption-key updates return an explicit unsupported-operation response. Standard statistics, partition statistics, and schema/spec cleanup updates are accepted. |
+| Commit CAS | Supported | Single-table commits validate base metadata, expected version token, referenced object existence, warehouse scope, and Iceberg commit requirements before advancing the current metadata pointer. Externally supplied metadata transitions preserve monotonic column, partition, and sequence assignment watermarks and immutable definitions for retained schemas, partition specs, sort orders, and snapshots. Standard commits preserve the normal commit-token file name and use an immutable-table-scoped fallback when rename followed by source-name reuse would otherwise collide at the same generation and commit ID. The catalog does not advertise `idempotency-key-lifetime`; clients must treat standard mutation-wide `Idempotency-Key` semantics as unsupported. |
 | Commit recovery | Supported | Commit log, idempotency lookup, diagnostics, and recovery routes expose staged/finalization gaps and repair safe idempotency gaps without moving the table pointer. |
 | Snapshot refs | Supported | Refs can be listed, created or replaced, and deleted through catalog commits. `main` is protected and refs with explicit retention require forced delete. |
-| Iceberg views | Supported | Basic create, list, load, replace, existence check, and drop routes persist view metadata with view-scoped authorization. |
-| Table credentials endpoint | Supported | Returns an empty `storage-credentials` list by default. Returns table-scoped temporary credentials only when credential vending is enabled. |
+| Iceberg views | Supported | Basic create, list, load, replace, existence check, and drop routes persist view metadata with view-scoped authorization. Replace identifiers must match the URL resource, `schema-id: -1` resolves to the last added schema, one commit timestamp is used consistently, and only Iceberg view format version 1 is accepted. |
+| Table credentials endpoint | Supported | Returns an empty `storage-credentials` list by default. Returns table-scoped temporary credentials only when credential vending is enabled. Credential responses set `Cache-Control: no-store, private`, `Pragma: no-cache`, and `Expires: 0`. |
 | Catalog diagnostics and export | Supported | Exposes recovery state, consistency state, backing manifest, recoverable commit-log WAL state, strong backing migration target, single-active-writer policy, and scale validation matrix. |
-| Catalog import and rollback | Supported | Import/register and rollback use catalog validation and commit paths rather than direct pointer mutation. |
+| Catalog import and rollback | Supported | Import/register and online rollback use catalog validation and commit paths rather than direct pointer mutation. Online rollback accepts only a forward-safe metadata target that preserves assignment watermarks and retained definitions. Restoring an older target that lowers those watermarks is an offline disaster-recovery operation and requires every writer to be stopped. |
 | External catalog bridge | Supported operator path | Operator-supplied metadata pointer sync/import is supported for external catalog identity boundaries. Online vendor SDK polling and policy mirroring are not claimed. |
 | Multi-table transactions | Not claimed | RustFS currently claims single-table commit atomicity only. |

@@ -59,7 +59,7 @@
        {
          default = rustPlatform.buildRustPackage {
            pname = "rustfs";
-            version = "1.0.0-rc.1";
+            version = "1.0.0-rc.2";

            src = ./.;

@@ -2,8 +2,8 @@ apiVersion: v2
 name: rustfs
 description: RustFS helm chart to deploy RustFS on kubernetes cluster.
 type: application
-version: "1.0.0-rc.1"
-appVersion: "1.0.0-rc.1"
+version: "1.0.0-rc.2"
+appVersion: "1.0.0-rc.2"
 home: https://rustfs.com
 icon: https://media.sys.truenas.net/apps/rustfs/icons/icon.svg
 maintainers:
@@ -1,9 +1,9 @@
 %global _enable_debug_packages 0
 %global _empty_manifest_terminate_build 0
-%global prerelease rc.1
+%global prerelease rc.2
 Name:           rustfs
 Version:        1.0.0
-Release:        rc.1
+Release:        rc.2
 Summary:       High-performance distributed object storage for MinIO alternative

 License:        Apache-2.0
@@ -58,6 +58,9 @@ install %_builddir/%{name}-%{version}-%{prerelease}/target/%_arch/%_arch-unknown
 %_bindir/rustfs

 %changelog
+* Fri Aug 14 2026 overtrue <anzhengchao@gmail.com>
+- Update RPM package to RustFS 1.0.0-rc.2
+
 * Sat Aug 08 2026 overtrue <anzhengchao@gmail.com>
 - Update RPM package to RustFS 1.0.0-rc.1

@@ -278,6 +278,8 @@ rustfs-signer.workspace = true
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true, features = ["raw_value"] }
 serde_urlencoded = { workspace = true }
+snap.workspace = true
+zstd.workspace = true

 # Cryptography and Security
 rustls = { workspace = true, default-features = false, features = ["aws-lc-rs", "logging", "tls12", "prefer-post-quantum", "std"] }
@@ -355,7 +357,6 @@ rcgen = { workspace = true }
 rustfs-test-utils.workspace = true
 # diagnose_e2e fixtures (archives are generated in-test, never checked in)
 zip = { workspace = true }
-zstd = { workspace = true }
 # Enables the shared MockWarmBackend / xl.meta assertion helpers exposed via
 # the ecstore `api::tier::test_util` facade module (rustfs/backlog#1148 ilm-6).
 rustfs-ecstore = { workspace = true, features = ["test-util"] }
@@ -40,7 +40,7 @@ use s3s::{Body, S3Request, S3Response, S3Result, s3_error};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::sync::LazyLock;
-use tracing::{Span, error, info, warn};
+use tracing::{error, info, warn};

 const LOG_COMPONENT_ADMIN_API: &str = "admin_api";
 const LOG_SUBSYSTEM_AUDIT_TARGET: &str = "audit_target";
@@ -278,8 +278,6 @@ pub struct AuditTargetConfig {}
 #[async_trait::async_trait]
 impl Operation for AuditTargetConfig {
    async fn call(&self, req: S3Request<Body>, params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        let (target_type, target_name) = extract_target_params(&params)?;

        authorize_audit_admin_request(&req, AdminAction::SetBucketTargetAction).await?;
@@ -345,8 +343,6 @@ pub struct ListAuditTargets {}
 #[async_trait::async_trait]
 impl Operation for ListAuditTargets {
    async fn call(&self, req: S3Request<Body>, _params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        authorize_audit_admin_request(&req, AdminAction::GetBucketTargetAction).await?;

        let mut runtime_statuses = HashMap::new();
@@ -370,8 +366,6 @@ pub struct RemoveAuditTarget {}
 #[async_trait::async_trait]
 impl Operation for RemoveAuditTarget {
    async fn call(&self, req: S3Request<Body>, params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        let (target_type, target_name) = extract_target_params(&params)?;

        authorize_audit_admin_request(&req, AdminAction::SetBucketTargetAction).await?;
@@ -838,6 +832,13 @@ mod tests {
            extract_block_between_markers(src, "impl Operation for ListAuditTargets", "pub struct RemoveAuditTarget");
        let delete_block = extract_block_between_markers(src, "impl Operation for RemoveAuditTarget", "#[cfg(test)]");

+        for block in [put_block, list_block, delete_block] {
+            assert!(
+                !block.contains(".enter()"),
+                "async audit handlers must rely on request-future instrumentation instead of holding span guards across awaits"
+            );
+        }
+
        assert!(
            put_block.contains("authorize_audit_admin_request(&req, AdminAction::SetBucketTargetAction).await?;"),
            "audit target writes should require SetBucketTargetAction"
@@ -43,7 +43,7 @@ use s3s::{Body, S3Request, S3Response, S3Result, s3_error};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::sync::LazyLock;
-use tracing::{Span, error, info, warn};
+use tracing::{error, info, warn};

 const LOG_COMPONENT_ADMIN_API: &str = "admin_api";

@@ -333,8 +333,6 @@ pub struct NotificationTarget {}
 #[async_trait::async_trait]
 impl Operation for NotificationTarget {
    async fn call(&self, req: S3Request<Body>, params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        let (target_type, target_name) = extract_target_params(&params)?;
        let context = app_context_from_req(&req);

@@ -401,8 +399,6 @@ pub struct ListNotificationTargets {}
 #[async_trait::async_trait]
 impl Operation for ListNotificationTargets {
    async fn call(&self, req: S3Request<Body>, _params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        authorize_notification_admin_request(&req, AdminAction::GetBucketTargetAction).await?;
        refresh_persisted_module_switches_from_store().await.map_err(|err| {
            warn!(
@@ -439,8 +435,6 @@ pub struct ListTargetsArns {}
 #[async_trait::async_trait]
 impl Operation for ListTargetsArns {
    async fn call(&self, req: S3Request<Body>, _params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        authorize_notification_admin_request(&req, AdminAction::GetBucketTargetAction).await?;
        if let Some(reason) = notification_target_operation_block_reason(
            "querying notification target ARNs for bucket associations from the console",
@@ -485,8 +479,6 @@ pub struct RemoveNotificationTarget {}
 #[async_trait::async_trait]
 impl Operation for RemoveNotificationTarget {
    async fn call(&self, req: S3Request<Body>, params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        let span = Span::current();
-        let _enter = span.enter();
        let (target_type, target_name) = extract_target_params(&params)?;
        let context = app_context_from_req(&req);

@@ -1006,6 +998,13 @@ mod tests {
            extract_block_between_markers(src, "impl Operation for ListTargetsArns", "pub struct RemoveNotificationTarget");
        let delete_block = extract_block_between_markers(src, "impl Operation for RemoveNotificationTarget", "fn extract_param");

+        for block in [put_block, list_block, arns_block, delete_block] {
+            assert!(
+                !block.contains(".enter()"),
+                "async notification handlers must rely on request-future instrumentation instead of holding span guards across awaits"
+            );
+        }
+
        assert!(
            put_block.contains("authorize_notification_admin_request(&req, AdminAction::SetBucketTargetAction).await?;"),
            "notification target writes should require SetBucketTargetAction"
@@ -535,8 +535,13 @@ impl Operation for GetReplicationMetricsHandler {

        let bucket_stats = cluster_replication_stats(bucket, app_context_from_req(&req)).await;

-        let data = serde_json::to_vec(&bucket_stats.replication_stats)
-            .map_err(|_| S3Error::with_message(S3ErrorCode::InternalError, "serialize failed"))?;
+        // Same minio-go `replication.Metrics` wire shape as
+        // `?replication-metrics` — the internal snake_case stats are the peer
+        // RPC wire format and must not leak here.
+        let data = serde_json::to_vec(&crate::admin::replication_metrics_wire::MetricsWire::from(
+            &bucket_stats.replication_stats,
+        ))
+        .map_err(|_| S3Error::with_message(S3ErrorCode::InternalError, "serialize failed"))?;
        let mut headers = HeaderMap::new();
        headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
        Ok(S3Response::with_headers((StatusCode::OK, Body::from(data)), headers))
@@ -1153,7 +1158,7 @@ struct MrfResponse {
 fn build_mrf_response(
    bucket: String,
    bucket_stats: &BucketStats,
-    durable: crate::admin::storage_api::replication::DurableMrfBacklog,
+    durable: &crate::admin::storage_api::replication::DurableMrfBacklog,
 ) -> MrfResponse {
    let observation_scope = if bucket_stats.replication_stats.cluster_complete {
        "cluster_aggregated"
@@ -1223,7 +1228,10 @@ fn build_mrf_response(
        total_failed_size,
        queued_count: queued.count,
        queued_size: queued.bytes,
-        per_object_entries_available: false,
+        // The default (non-aggregate) response mode streams the durable
+        // backlog per object, so the enumerable API exists whenever the
+        // backlog is readable.
+        per_object_entries_available: durable.available,
        runtime_stats_available: bucket_stats.replication_stats.provider_available,
        cluster_complete: bucket_stats.replication_stats.cluster_complete,
        observed_node_count: bucket_stats.replication_stats.observed_node_count,
@@ -1235,23 +1243,165 @@ fn build_mrf_response(
    }
 }

+/// One durable MRF backlog entry rendered for the default (madmin-compatible)
+/// stream. Field names are the exact json tags of madmin-go `ReplicationMRF`
+/// (replication-api.go), which `mc replicate backlog` decodes one JSON
+/// document at a time. `Size` and `TargetARNs` are RustFS extension keys with
+/// no madmin counterpart; Go decoders ignore unknown keys.
+#[derive(Debug, Serialize)]
+struct MrfEntryDocument {
+    /// The durable backlog is a cluster-shared ledger with no per-node
+    /// attribution, so the madmin `nodeName` tag is always empty.
+    #[serde(rename = "nodeName")]
+    node_name: String,
+    #[serde(rename = "bucket")]
+    bucket: String,
+    #[serde(rename = "object")]
+    object: String,
+    #[serde(rename = "versionId")]
+    version_id: String,
+    #[serde(rename = "retryCount")]
+    retry_count: i32,
+    #[serde(rename = "Size")]
+    size: i64,
+    #[serde(rename = "TargetARNs", skip_serializing_if = "Vec::is_empty")]
+    target_arns: Vec<String>,
+}
+
+/// Upper bound on the number of documents one stream response emits. The
+/// durable ledger is not bounded by the in-memory pending cap (recovery can
+/// persist far larger generations), and the body is buffered before send, so
+/// an unbounded read could stage hundreds of MB per request. The handler
+/// rejects a response beyond this bound instead of returning a partial 200.
+const REPLICATION_MRF_MAX_STREAM_ENTRIES: usize = 10_000;
+
+/// Project the durable backlog into madmin `ReplicationMRF` documents,
+/// scoped to `bucket` when it is non-empty (madmin allows an empty bucket to
+/// mean "across all buckets"), bounded by
+/// [`REPLICATION_MRF_MAX_STREAM_ENTRIES`]. Returns the documents and whether
+/// the backlog was truncated.
+fn mrf_entry_documents(
+    bucket: &str,
+    durable: &crate::admin::storage_api::replication::DurableMrfBacklog,
+) -> (Vec<MrfEntryDocument>, bool) {
+    let mut documents = Vec::new();
+    let mut truncated = false;
+    for entry in durable
+        .entries
+        .iter()
+        .filter(|entry| bucket.is_empty() || entry.bucket == bucket)
+    {
+        if documents.len() >= REPLICATION_MRF_MAX_STREAM_ENTRIES {
+            truncated = true;
+            break;
+        }
+        documents.push(MrfEntryDocument {
+            node_name: String::new(),
+            bucket: entry.bucket.clone(),
+            object: entry.object.clone(),
+            // Delete-marker purge entries track the marker version separately;
+            // fall back to it so those rows still carry a version identity.
+            // The nil UUID is RustFS's in-memory null-version sentinel and
+            // must leave as the S3 wire token, not a zero UUID.
+            version_id: entry
+                .version_id
+                .or(entry.delete_marker_version_id)
+                .map(|v| {
+                    if v.is_nil() {
+                        rustfs_filemeta::NULL_VERSION_ID.to_string()
+                    } else {
+                        v.to_string()
+                    }
+                })
+                .unwrap_or_default(),
+            retry_count: entry.retry_count,
+            size: entry.size,
+            target_arns: entry.target_arns.clone(),
+        });
+    }
+    (documents, truncated)
+}
+
+/// Render the MRF backlog as a response body.
+///
+/// Default (madmin-compatible) mode emits one `ReplicationMRF` JSON document
+/// per line with no envelope — madmin's `BucketReplicationMRF` reads the body
+/// with a `json.Decoder` loop, so an envelope object would decode as a single
+/// entry whose `"Bucket"` key case-insensitively matches
+/// `ReplicationMRF.Bucket` (a phantom row in `mc replicate backlog`), and an
+/// empty backlog must render an empty body so the loop ends on io.EOF with
+/// zero rows.
+///
+/// `aggregate=true` (RustFS extension) keeps the enveloped counter shape;
+/// backlog-source health (`RuntimeStatsAvailable`/`DurableBacklogAvailable`)
+/// is only representable there — an unreadable ledger fails the stream
+/// request outright in the handler (madmin only decodes the body of a 200,
+/// so an empty stream would read as a healthy zero-row backlog).
+fn render_mrf_backlog(
+    response: &MrfResponse,
+    durable: &crate::admin::storage_api::replication::DurableMrfBacklog,
+    aggregate: bool,
+) -> Result<(Vec<u8>, bool), serde_json::Error> {
+    if aggregate {
+        return Ok((serde_json::to_vec(response)?, false));
+    }
+
+    let (documents, truncated) = mrf_entry_documents(&response.bucket, durable);
+    let mut data = Vec::new();
+    for entry in documents {
+        serde_json::to_writer(&mut data, &entry)?;
+        data.push(b'\n');
+    }
+    Ok((data, truncated))
+}
+
+fn ensure_complete_mrf_stream(truncated: bool) -> S3Result<()> {
+    if truncated {
+        return Err(S3Error::with_message(
+            S3ErrorCode::ServiceUnavailable,
+            "durable MRF backlog exceeds the stream limit; narrow the bucket scope or drain the backlog".to_string(),
+        ));
+    }
+    Ok(())
+}
+
 /// `GET /v3/replication/mrf`
 ///
 /// Reports the failed-replication backlog (MinIO's MRF concept) for a bucket.
 ///
-/// Compatibility note: MinIO returns a stream of individual MRF entries. RustFS
-/// deliberately returns aggregate runtime and durable counters instead.
-/// `PerObjectEntriesAvailable` remains false until an enumerable API exists.
-/// `PerTargetDurableEntriesAvailable` is false when the durable backlog includes
-/// older entries that cannot be attributed to a target.
+/// The default response is a madmin-compatible stream of `ReplicationMRF`
+/// documents built from the durable backlog ledger (in-memory failures that
+/// have not been flushed yet — the persister runs every few seconds — are not
+/// visible). `?aggregate=true` (RustFS extension) returns the enveloped
+/// runtime + durable counter shape instead; `PerTargetDurableEntriesAvailable`
+/// is false there when the durable backlog includes older entries that cannot
+/// be attributed to a target.
+///
+/// The madmin `node` parameter is accepted but has no filtering effect: the
+/// durable ledger is cluster-shared with no per-node attribution, so every
+/// node serves the same (complete) backlog.
+///
+/// Authorization: the stream requires `admin:ReplicationDiff` (it enumerates
+/// object names and version ids, MinIO parity); `?aggregate=true` carries no
+/// object identities and requires only `admin:GetReplicationMetrics`.
 pub struct ReplicationMrfHandler {}

 #[async_trait::async_trait]
 impl Operation for ReplicationMrfHandler {
    async fn call(&self, req: S3Request<Body>, _params: Params<'_, '_>) -> S3Result<S3Response<(StatusCode, Body)>> {
-        validate_replication_admin_request(&req, AdminAction::GetReplicationMetricsAction).await?;
-
        let queries = extract_query_params(&req.uri);
+        let aggregate = queries.get("aggregate").map(String::as_str) == Some("true");
+        // The default stream enumerates object names and version ids, which
+        // a metrics-only principal must not see; gate it on the same action
+        // MinIO uses for this endpoint. The aggregate counters carry no
+        // object identities and keep the metrics action.
+        let action = if aggregate {
+            AdminAction::GetReplicationMetricsAction
+        } else {
+            AdminAction::ReplicationDiff
+        };
+        validate_replication_admin_request(&req, action).await?;
+
        let Some(bucket) = queries.get("bucket").filter(|b| !b.is_empty()).cloned() else {
            return Err(s3_error!(InvalidRequest, "bucket is required"));
        };
@@ -1275,14 +1425,48 @@ impl Operation for ReplicationMrfHandler {
            return Err(ApiError::from(err).into());
        }

+        if let Some(node) = queries.get("node").filter(|node| !node.is_empty() && node.as_str() != "all") {
+            // The durable backlog ledger is cluster-shared with no per-node
+            // attribution, so a node-scoped request still sees the complete
+            // (superset) backlog.
+            debug!(node = %node, "replication mrf node filter has no effect on the cluster-shared backlog");
+        }
+
        let durable = crate::admin::storage_api::replication::read_durable_mrf_backlog(store).await;
        let bucket_stats = cluster_replication_stats(&bucket, app_context_from_req(&req)).await;
-        let response = build_mrf_response(bucket, &bucket_stats, durable);
+        let response = build_mrf_response(bucket, &bucket_stats, &durable);

-        let data = serde_json::to_vec(&response)
+        if !durable.available && !aggregate {
+            // The madmin stream has no envelope to carry source health, and
+            // madmin only decodes the body of a 200 — an empty stream would
+            // read as a clean, healthy zero-row backlog. Fail loudly instead;
+            // aggregate mode still reports the availability fields.
+            tracing::warn!(
+                bucket = %response.bucket,
+                "durable MRF backlog is unreadable; failing the stream request — use aggregate=true to see source health"
+            );
+            return Err(S3Error::with_message(
+                S3ErrorCode::ServiceUnavailable,
+                "durable MRF backlog is unreadable; retry, or use aggregate=true for source health".to_string(),
+            ));
+        }
+
+        let (data, truncated) = render_mrf_backlog(&response, &durable, aggregate)
            .map_err(|e| S3Error::with_message(S3ErrorCode::InternalError, format!("serialize failed: {e}")))?;
        let mut headers = HeaderMap::new();
        headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
+        if truncated {
+            tracing::warn!(
+                event = "replication_mrf_stream_rejected",
+                component = "admin",
+                subsystem = "replication",
+                result = "rejected",
+                bucket = %response.bucket,
+                max_entries = REPLICATION_MRF_MAX_STREAM_ENTRIES,
+                "replication mrf stream exceeds the response limit"
+            );
+        }
+        ensure_complete_mrf_stream(truncated)?;
        Ok(S3Response::with_headers((StatusCode::OK, Body::from(data)), headers))
    }
 }
@@ -1292,7 +1476,8 @@ mod tests {
    use super::{
        REMOTE_TARGET_UNSUPPORTED_FIELDS, REMOTE_TARGET_WRITABLE_FIELDS, RemoteTargetCredentialsRequest, RemoteTargetRequest,
        ReplicationDiffEntry, SUPPORTED_REMOTE_TARGET_API, TargetUpdateOp, build_mrf_response, extract_query_params,
-        parse_remote_target_update_ops, render_replication_diff, unique_replication_peers, validate_remote_target_tls_settings,
+        parse_remote_target_update_ops, render_mrf_backlog, render_replication_diff, unique_replication_peers,
+        validate_remote_target_tls_settings,
    };
    use crate::admin::storage_api::bucket::target::{BucketTarget, LatencyStat};
    use crate::admin::storage_api::replication::{BucketStats, DurableMrfBacklog, MrfOpKind, MrfReplicateEntry};
@@ -1510,7 +1695,7 @@ mod tests {
            ],
        };

-        let response = build_mrf_response("bucket-a".to_string(), &stats, durable);
+        let response = build_mrf_response("bucket-a".to_string(), &stats, &durable);
        let json = serde_json::to_value(response).expect("MRF response should serialize");

        assert_eq!(json["TotalFailedCount"], 3);
@@ -1522,7 +1707,9 @@ mod tests {
        assert_eq!(json["RuntimeStatsAvailable"], true);
        assert_eq!(json["ClusterComplete"], false);
        assert_eq!(json["Targets"][0]["ObservationScope"], "partial_cluster");
-        assert_eq!(json["PerObjectEntriesAvailable"], false);
+        // The bare stream enumerates the durable backlog per object, so a
+        // readable backlog advertises the enumerable API.
+        assert_eq!(json["PerObjectEntriesAvailable"], true);
        assert_eq!(json["PerTargetDurableEntriesAvailable"], true);

        let targets = json["Targets"].as_array().expect("targets should serialize as an array");
@@ -1569,7 +1756,7 @@ mod tests {
            }],
        };

-        let response = build_mrf_response("bucket-a".to_string(), &stats, durable);
+        let response = build_mrf_response("bucket-a".to_string(), &stats, &durable);
        let json = serde_json::to_value(response).expect("MRF response should serialize");

        assert_eq!(json["DurableBacklogAvailable"], true);
@@ -1587,7 +1774,7 @@ mod tests {

    #[test]
    fn mrf_response_distinguishes_unavailable_sources_from_valid_zero() {
-        let unavailable = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), DurableMrfBacklog::default());
+        let unavailable = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &DurableMrfBacklog::default());
        let unavailable_json = serde_json::to_value(unavailable).expect("unavailable response should serialize");
        assert_eq!(unavailable_json["RuntimeStatsAvailable"], false);
        assert_eq!(unavailable_json["DurableBacklogAvailable"], false);
@@ -1600,7 +1787,7 @@ mod tests {
        let valid_empty = build_mrf_response(
            "bucket-a".to_string(),
            &valid_empty_stats,
-            DurableMrfBacklog {
+            &DurableMrfBacklog {
                available: true,
                entries: Vec::new(),
            },
@@ -1613,6 +1800,153 @@ mod tests {
        assert_eq!(valid_empty_json["PerTargetDurableEntriesAvailable"], true);
    }

+    fn sample_durable_backlog() -> DurableMrfBacklog {
+        DurableMrfBacklog {
+            available: true,
+            entries: vec![
+                MrfReplicateEntry {
+                    bucket: "bucket-a".to_string(),
+                    object: "object-a".to_string(),
+                    version_id: Some(uuid::Uuid::from_u128(7)),
+                    retry_count: 2,
+                    size: 250,
+                    op: MrfOpKind::Object,
+                    target_arns: vec!["arn-a".to_string()],
+                    ..Default::default()
+                },
+                MrfReplicateEntry {
+                    bucket: "other-bucket".to_string(),
+                    object: "object-b".to_string(),
+                    version_id: None,
+                    retry_count: 0,
+                    size: 999,
+                    op: MrfOpKind::Object,
+                    target_arns: Vec::new(),
+                    ..Default::default()
+                },
+            ],
+        }
+    }
+
+    /// madmin's `BucketReplicationMRF` decodes the body one `ReplicationMRF`
+    /// JSON document at a time; the default response must therefore be a bare
+    /// document stream with madmin's exact json tags, not an envelope.
+    #[test]
+    fn mrf_stream_renders_bare_madmin_documents() {
+        let durable = sample_durable_backlog();
+        let response = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &durable);
+
+        let (body, _) = render_mrf_backlog(&response, &durable, false).expect("stream body should serialize");
+        let text = String::from_utf8(body).expect("body should be utf-8");
+        let lines: Vec<&str> = text.lines().filter(|line| !line.trim().is_empty()).collect();
+
+        // Only the entry matching the requested bucket is streamed.
+        assert_eq!(lines.len(), 1, "expected one MRF document, got: {text}");
+        let doc: serde_json::Value = serde_json::from_str(lines[0]).expect("each line should be a JSON document");
+        assert_eq!(doc["bucket"], "bucket-a");
+        assert_eq!(doc["object"], "object-a");
+        assert_eq!(doc["versionId"], uuid::Uuid::from_u128(7).to_string());
+        assert_eq!(doc["retryCount"], 2);
+        // madmin `ReplicationMRF` has a `nodeName` tag; the durable backlog is
+        // cluster-shared, so RustFS reports an empty node name.
+        assert_eq!(doc["nodeName"], "");
+        // The envelope keys must not leak into the stream: a `"Bucket"` key
+        // would case-insensitively populate `ReplicationMRF.Bucket` and render
+        // a phantom row in `mc replicate backlog`.
+        assert!(doc.get("Bucket").is_none());
+        assert!(doc.get("Targets").is_none());
+    }
+
+    /// An empty backlog must produce an empty body: madmin's decoder loop then
+    /// terminates on io.EOF with zero rows instead of one phantom row.
+    #[test]
+    fn mrf_stream_renders_empty_body_for_no_entries() {
+        let durable = DurableMrfBacklog {
+            available: true,
+            entries: Vec::new(),
+        };
+        let response = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &durable);
+
+        let (body, _) = render_mrf_backlog(&response, &durable, false).expect("stream body should serialize");
+        assert!(
+            body.is_empty(),
+            "empty backlog must serialize to an empty body, got: {}",
+            String::from_utf8_lossy(&body)
+        );
+    }
+
+    /// `?aggregate=true` (RustFS extension) keeps the enveloped counter shape.
+    #[test]
+    fn mrf_aggregate_envelope_retains_counters() {
+        let durable = sample_durable_backlog();
+        let response = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &durable);
+
+        let (body, _) = render_mrf_backlog(&response, &durable, true).expect("aggregate body should serialize");
+        let json: serde_json::Value = serde_json::from_slice(&body).expect("aggregate body should be one JSON object");
+        assert_eq!(json["Bucket"], "bucket-a");
+        assert_eq!(json["DurableCount"], 1);
+        assert_eq!(json["DurableBacklogAvailable"], true);
+        // The bare stream is an enumerable per-object API, so the aggregate
+        // shell now truthfully advertises it whenever the backlog is readable.
+        assert_eq!(json["PerObjectEntriesAvailable"], true);
+    }
+
+    /// The nil UUID is RustFS's in-memory null-version sentinel; the wire
+    /// token is `null`, never the zero UUID (second review round).
+    #[test]
+    fn mrf_stream_maps_nil_version_to_null_token() {
+        let durable = DurableMrfBacklog {
+            available: true,
+            entries: vec![MrfReplicateEntry {
+                bucket: "bucket-a".to_string(),
+                object: "null-version-object".to_string(),
+                version_id: Some(uuid::Uuid::nil()),
+                retry_count: 1,
+                size: 10,
+                op: MrfOpKind::Object,
+                ..Default::default()
+            }],
+        };
+        let response = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &durable);
+
+        let (body, truncated) = render_mrf_backlog(&response, &durable, false).expect("stream body should serialize");
+        assert!(!truncated);
+        let doc: serde_json::Value =
+            serde_json::from_str(String::from_utf8(body).expect("utf-8").lines().next().expect("one line"))
+                .expect("line should be a JSON document");
+        assert_eq!(doc["versionId"], "null");
+    }
+
+    /// The durable ledger is not bounded by the in-memory pending cap; the
+    /// stream must stop at the documented bound and signal truncation
+    /// (second review round).
+    #[test]
+    fn mrf_stream_truncates_at_the_documented_bound() {
+        let entries = (0..super::REPLICATION_MRF_MAX_STREAM_ENTRIES + 1)
+            .map(|index| MrfReplicateEntry {
+                bucket: "bucket-a".to_string(),
+                object: format!("object-{index}"),
+                retry_count: 1,
+                op: MrfOpKind::Object,
+                ..Default::default()
+            })
+            .collect();
+        let durable = DurableMrfBacklog {
+            available: true,
+            entries,
+        };
+        let response = build_mrf_response("bucket-a".to_string(), &BucketStats::default(), &durable);
+
+        let (body, truncated) = render_mrf_backlog(&response, &durable, false).expect("stream body should serialize");
+        assert!(truncated, "one entry past the bound must signal truncation");
+        assert_eq!(
+            String::from_utf8(body).expect("utf-8").lines().count(),
+            super::REPLICATION_MRF_MAX_STREAM_ENTRIES
+        );
+        let error = super::ensure_complete_mrf_stream(truncated).expect_err("partial streams must not return 200");
+        assert_eq!(error.code(), &s3s::S3ErrorCode::ServiceUnavailable);
+    }
+
    #[test]
    fn test_extract_query_params_decodes_percent_encoded_values() {
        let uri: Uri = "/rustfs/admin/v3/list-remote-targets?bucket=foo%2Fbar&flag=a+b"
@@ -29,6 +29,6 @@ impl Operation for RestLoadCredentialsHandler {
        let issuer = IamTableCredentialIssuer::from_request(&req)?;
        let response =
            load_credentials_response(&store, &warehouse, &namespace, &table, &issuer, Some(&principal.credentials)).await?;
-        build_json_response(StatusCode::OK, &response)
+        build_sensitive_json_response(StatusCode::OK, &response)
    }
 }
@@ -125,7 +125,9 @@ impl Operation for RestLoadTableHandler {
        ensure_table_bucket_enabled_from_extensions(&req.extensions, &warehouse).await?;
        let metadata_backend = table_catalog_backend_from_extensions(&req.extensions)?;
        let store = table_catalog_store_from_backend(metadata_backend.clone())?;
-        let response = load_table_response(&store, &metadata_backend, &warehouse, &namespace, &table).await?;
+        let snapshot_selection = rest_table_snapshot_selection_from_query(&req.uri)?;
+        let mut response = load_table_response(&store, &metadata_backend, &warehouse, &namespace, &table).await?;
+        apply_rest_table_snapshot_selection(&mut response.metadata, snapshot_selection);
        build_json_response(StatusCode::OK, &response)
    }
 }
@@ -158,7 +160,7 @@ impl Operation for RestCommitTableHandler {
        let principal = authorize_table_catalog_resource_request(&req, &resource, AdminAction::CommitTableAction).await?;
        install_table_catalog_s3_request_info(&mut req, &principal)?;
        ensure_table_bucket_enabled_from_extensions(&req.extensions, &warehouse).await?;
-        let request = read_json_body::<RestCommitTableRequest>(std::mem::take(&mut req.input)).await?;
+        let request = read_rest_commit_table_request(std::mem::take(&mut req.input)).await?;
        let metadata_backend = table_catalog_backend_from_extensions(&req.extensions)?;
        let store = table_catalog_store_from_backend(metadata_backend.clone())?;
        let commit_backend = TableCommitObjectBackend::for_request(metadata_backend, req);
@@ -178,6 +180,14 @@ impl Operation for RestDropTableHandler {
        let table = table_name_from_params(&params)?;
        let resource = TableCatalogResource::table(&warehouse, &namespace, &table);
        authorize_table_catalog_resource_request(&req, &resource, AdminAction::DeleteTableAction).await?;
+        let purge_requested = rest_purge_requested_from_query(&req.uri)?;
+        if purge_requested {
+            return Err(iceberg_rest_error(
+                ICEBERG_ERROR_UNSUPPORTED_OPERATION,
+                StatusCode::NOT_ACCEPTABLE,
+                "purgeRequested=true is not supported",
+            ));
+        }
        ensure_table_bucket_enabled_from_extensions(&req.extensions, &warehouse).await?;
        let store = table_catalog_store_from_extensions(&req.extensions)?;
        drop_table_in_store(&store, &warehouse, &namespace, &table).await?;
--- a/Show More
+++ b/Show More