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minio/cmd
Feng Ruohang d56b1063b9 perf(pools): delete the set groups of a bulk delete concurrently
The single-pool lock-domain change made a bulk delete lock each set's
names in that set and ran the groups one after another: a batch over S
sets cost about S lock round trips plus S set deletes, where the release
took one lock and then let erasureSets.DeleteObjects work on all sets at
once. Every distributed single pool with several sets paid for it,
including layouts where every set uses every host.

Run the groups concurrently, up to 16 at a time. Each group takes only
its own set's lock and waits for no other while it holds it, so the
groups cannot hold each other. A group checks for cancellation once it
is admitted, so a queued group of a canceled request does no storage
work. Each result is written only by the group of its object.

Tests: the first drive calls of two sets must overlap, which fails when
the groups run one after the other; with one worker, a group in flight
at a cancel keeps its own result, an earlier group keeps its success,
and a queued group makes no drive call.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
2026-11-06 18:38:34 +08:00
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