Interrupted PUT leave temporary files and stale metadata #469

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opened 2023-01-08 19:11:41 +00:00 by kaiyou · 1 comment

kaiyou commented

2023-01-08 19:11:41 +00:00

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When a PUT (either PutObject or UploadPart) fails before all related blocks are written to disk, the Object is never created, while some stale data and metadata remains:

stale .tmp files not renamed to .zst even when properly uploaded and written, if request is interrupted while data is flushed to disk and before the file is renamed;
stale Block entries, not related to any ObjectVersion;
stale ObjectVersion in uploading state (some are normal unfinished multipart uploads, some are failed PUT requests).

Two following commits were pushed to fix most of these issues:

After running the dev build for 3 days, no new stale meta or temporary files remain, so maybe this issue can be closed immediately, I mostly wrote it to keep track of the failure case.

In case you have reamining errorred blocks:

drop all unfinished multipart uploads,
check zst integrity of stale tmp files and rename them to .zst,
drop and reupload remaining objects.

(Or just drop and reupload them all if you can affort it).

When a PUT (either `PutObject` or `UploadPart`) fails before all related blocks are written to disk, the `Object` is never created, while some stale data and metadata remains: - stale `.tmp` files not renamed to `.zst` even when properly uploaded and written, if request is interrupted while data is flushed to disk and before the file is renamed; - stale `Block` entries, not related to any `ObjectVersion`; - stale `ObjectVersion` in `uploading` state (some are normal unfinished multipart uploads, some are failed PUT requests). Two following commits were pushed to fix most of these issues: - https://git.deuxfleurs.fr/Deuxfleurs/garage/commit/0650a43cf14e7e52121a553130a9ea6c92b7bd4a - https://git.deuxfleurs.fr/Deuxfleurs/garage/commit/936b6cb563b9dc8bb5c879f8bd6b89574f016f03 After running the dev build for 3 days, no new stale meta or temporary files remain, so maybe this issue can be closed immediately, I mostly wrote it to keep track of the failure case. In case you have reamining errorred blocks: - drop all unfinished multipart uploads, - check zst integrity of stale tmp files and rename them to `.zst`, - drop and reupload remaining objects. (Or just drop and reupload them all if you can affort it).