compactor: serve urgent and defer compaction lanes - #16391
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Small jobs that keep up with new blocks and big periodic jobs now queue separately, so each can get its own worker fleet. Opt in with -compactor-scheduler.lane-policy.policy=urgency.
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What this PR does
Adds an opt-in lane policy that queues compaction jobs in two lanes. A job is urgent when its blocks span up to
-compactor-scheduler.lane-policy.urgency.max-span(2h by default), or when it is out of order. Everything else goes to the defer lane. Workers pick a lane withcompact-urgentandcompact-deferin-compactor.scheduler-client.lanes, so each lane can have its own fleet.The default policy is still
simple, with a single compaction lane.Stacked on #16489. Review that one first.
Which issue(s) this PR fixes or relates to
Fixes N/A
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]. If changelog entry is not needed, please add thechangelog-not-neededlabel to the PR.about-versioning.mdupdated with experimental features.