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Merge pull request #208 from pgsty/codex/conditional-put-release-notes

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docs: describe conditional PUT behavior and tested recovery guidance
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Feng Ruohang
2026-09-16 16:09:22 +08:00
committed by GitHub
parent 0e3c43778e e791640dac
commit a168576adb
1 changed files with 16 additions and 5 deletions
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CHANGELOG.md
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@@ -29,7 +29,7 @@ and [complete commit range](https://github.com/pgsty/silo/compare/RELEASE.2026-0
recreated parents and explicitly reconcile pre-upgrade revocations whose recreated parents and explicitly reconcile pre-upgrade revocations whose
history is already lost. Restoring an older backup can lose later revocations; history is already lost. Restoring an older backup can lose later revocations;
keep affected sites isolated until reconciliation/rekeying is complete. See keep affected sites isolated until reconciliation/rekeying is complete. See
[the operator runbook](https://github.com/pgsty/silo.pgsty.com/blob/29c7f220b3acc556ad570694056d35e11246f1b9/content/operations/replication/iam-upgrade.md). [the operator runbook](https://github.com/pgsty/silo.pgsty.com/blob/7bd2d57c2ce5aaa804d0b1a2fe0e5eed69d15235/content/operations/replication/iam-upgrade.md).
- Enforce an absolute HTTP/1 request-header deadline through the connection - Enforce an absolute HTTP/1 request-header deadline through the connection
wrapper (#196). Repeated small reads no longer extend that deadline, and wrapper (#196). Repeated small reads no longer extend that deadline, and
`--read-header-timeout` / `MINIO_READ_HEADER_TIMEOUT` now reaches the HTTP `--read-header-timeout` / `MINIO_READ_HEADER_TIMEOUT` now reaches the HTTP
@@ -91,7 +91,7 @@ and [complete commit range](https://github.com/pgsty/silo/compare/RELEASE.2026-0
ordinary metadata. Thanks to Mikhail Khadarenka (@chodorenko) for the fix in #187. ordinary metadata. Thanks to Mikhail Khadarenka (@chodorenko) for the fix in #187.
**Existing data:** these repairs prevent new errors; they do not scan or rewrite **Existing data:** these repairs prevent new errors; they do not scan or rewrite
historical object metadata, recover lost tags or prove that old purge work has historical object metadata, recover lost tags or prove that old purge work has
converged. Follow the [read-only audit procedure](https://github.com/pgsty/silo.pgsty.com/blob/29c7f220b3acc556ad570694056d35e11246f1b9/content/operations/replication/replica-metadata-audit.md) converged. Follow the [read-only audit procedure](https://github.com/pgsty/silo.pgsty.com/blob/7bd2d57c2ce5aaa804d0b1a2fe0e5eed69d15235/content/operations/replication/replica-metadata-audit.md)
before planning any repair of stored state. before planning any repair of stored state.
- Evaluate conditional multipart completion against the logical current object - Evaluate conditional multipart completion against the logical current object
@@ -104,9 +104,20 @@ and [complete commit range](https://github.com/pgsty/silo/compare/RELEASE.2026-0
applies when the unreadable pool may not hold the object: absence cannot be applies when the unreadable pool may not hold the object: absence cannot be
verified. Retry after the pool recovers. Unconditional completion and the verified. Retry after the pool recovers. Unconditional completion and the
single-pool path retain their existing behavior. single-pool path retain their existing behavior.
Ordinary conditional PUT has a separate cross-pool precondition gap tracked
in [#199](https://github.com/pgsty/silo/issues/199); the multipart repair does - Evaluate ordinary multi-pool conditional PUT against the logical current
not resolve it. object across all pools, including draining pools, under the existing object
lock (#207). A stale destination copy no longer accepts a stale ETag or rejects
the current one; a current delete marker is treated as absence.
**Availability change:** if any pool's object metadata cannot be verified,
the condition fails even when GET can use another pool; read-quorum failures
return 503. Restore readability or heal before retrying. Unconditional PUT,
single-pool conditions and internal replication retain their existing behavior.
A public condition with a destination `versionId` compares the current object
while preserving the requested write version. This change does not retire
stale copies in other pools, undo historical accepted overwrites or provide
a new global clock-ordering guarantee. The multipart-completion repair in #190
neither introduced nor repaired this separate PUT defect.
- Reconcile ordinary single-object version DELETE across all pools, including - Reconcile ordinary single-object version DELETE across all pools, including
null versions, delete markers and unqualified directory-marker DELETE. This null versions, delete markers and unqualified directory-marker DELETE. This