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Hook up partition compaction end to end implementation #6510

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alexqyle
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@alexqyle alexqyle commented Jan 15, 2025

What this PR does:

Implement partitioning compaction related lifecycle functions to make partitioning compaction end to end working.

  • PartitionCompactionBlockDeletableChecker makes sure no parent blocks got deleted after each compaction. Cleaner would handle parent blocks clean up for partitioning compaction.
  • ShardedBlockPopulator would use ShardedPosting to including particular series in the result block.
  • ShardedCompactionLifecycleCallbackis used to emit partitioning compaction metrics at beginning and end of compaction. It also initialize ShardedBlockPopulator for each compaction.

Which issue(s) this PR fixes:
Fixes #

Checklist

  • Tests updated
  • Documentation added
  • CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

Signed-off-by: Alex Le <[email protected]>
Signed-off-by: Alex Le <[email protected]>
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@danielblando danielblando left a comment

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LGTM

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@yeya24 yeya24 left a comment

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LGTM

@@ -698,15 +754,26 @@ func (c *Compactor) stopping(_ error) error {
}

func (c *Compactor) running(ctx context.Context) error {
// Ensure an initial cleanup occurred as first thing when running compactor.
if err := services.StartAndAwaitRunning(ctx, c.blocksCleaner); err != nil {
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Is there a specific reason why we have to move cleaning here?


func (f *DisabledDeduplicateFilter) DuplicateIDs() []ulid.ULID {
return nil
}
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Can we make these types private?
Can you add some comment to DisabledDeduplicateFilter. We want to disable duplicate filter because it makes no sense for partitioning compactor as we always have duplicates?


globalMaxt := blocks[0].Meta().MaxTime
g, _ := errgroup.WithContext(ctx)
g.SetLimit(8)
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Is this a sane default to set in Cortex?

}
if b.Meta().MaxTime > globalMaxt {
globalMaxt = b.Meta().MaxTime
}
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Although it is part of the original tsdb implementation and we also pass tsdb metrics in the function. I feel it is kind of unecessary to check block overlapping for partitioning compactor. Especially the info log above seems always there

symbols := make(map[string]struct{})
var builder labels.ScratchBuilder
for postings.Next() {
err := labelsFn(postings.At(), &builder, &bufChks)
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We can pass bufChks as nil. If it is nil then Decoder.Series will skip decoding chunk metadata.

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3 participants