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fix(storage): queue multipart parts for foreground write permits (#7337)

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Multipart parts shared the 250 ms direct-PutObject wait on the foreground
write permit pool, so SDK-default concurrency (many parts per upload in
flight at once) was rejected wholesale with SlowDown at stock settings.
Keep the pool that bounds in-flight bodies, but let parts wait in a
bounded queue with their own timeout before body ingest, report the
queue depth in the ForegroundWrite admission snapshot, and document the
foreground write admission environment variables.
This commit is contained in:
Zhengchao An
2026-09-07 12:13:30 +08:00
committed by GitHub
parent 672087ec0d
commit 4c4dcb6f5e
4 changed files with 299 additions and 20 deletions
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docs/architecture/workload-admission-contracts.md
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@@ -12,7 +12,7 @@
| Class | Provider (`impl WorkloadAdmissionSnapshotProvider`) | `active` / `queued` / `limit` source | Reports `Unknown` when |
|---|---|---|---|
| `ForegroundRead` | `ConcurrencyManager` in `rustfs/src/storage/concurrency/manager.rs` (source of truth); re-exposed unchanged by the RustFS runtime provider | disk-read permits in use / `None` (the semaphore exposes no waiter count) / configured max concurrent disk reads | the storage registry has no entry |
| `ForegroundWrite` | `ConcurrencyManager` in `rustfs/src/storage/concurrency/manager.rs` (source of truth); re-exposed unchanged by the RustFS runtime provider | foreground-write permits in use or legacy active-write counter / `None` / configured or derived write-admission limit | the storage registry has no entry |
| `ForegroundWrite` | `ConcurrencyManager` in `rustfs/src/storage/concurrency/manager.rs` (source of truth); re-exposed unchanged by the RustFS runtime provider | foreground-write permits in use or legacy active-write counter / multipart parts waiting in the bounded admission queue (`None` for the strict and legacy policies) / configured or derived write-admission limit | the storage registry has no entry |
| `Metadata` | `RustFsWorkloadAdmissionSnapshotProvider` in `rustfs/src/workload_admission.rs` | `Open` once the bucket metadata runtime handle exists; no counts | bucket metadata runtime not initialized |
| `Scanner` | same | scanner active work-unit counter / none / configured set-scan limit when nonzero | scanner runtime not initialized |
| `Repair` | same | heal active tasks / heal queue length / `None` (limits live behind the async heal manager state) | heal manager not initialized |