pageserver: reorder upload queue when possible #10218
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jcsp
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Dec 20, 2024
| upload_queue.num_inprogress_deletions == upload_queue.inprogress_tasks.len() | ||
| } | ||
| /// TODO: consider moving this and other associated logic into UploadOp and UploadQueue. | ||
| fn can_bypass(a: &UploadOp, b: &UploadOp) -> bool { |
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Let's unit test this against the most important invariants:
- A layer upload must happen before an index that references it
- A layer deletion must happen after an index that de-references it
- If a layer name that is re-used, the second upload must come after an index that de-references the earlier layer of the same name
- ...whichever others we can think of
7095 tests run: 6796 passed, 1 failed, 298 skipped (full report)Failures on Postgres 17
Test coverage report is not availableThe comment gets automatically updated with the latest test results
c2ea6a3 at 2024-12-20T17:46:05.948Z :recycle: |
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Problem
The upload queue currently sees significant head-of-line blocking. For example, index uploads act as upload barriers, and for every layer flush we schedule a layer and index upload, which effectively serializes layer uploads.
Resolves #10096.
Summary of changes
Allow upload queue operations to bypass the queue if they don't conflict with preceding operations.