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Bug #52058
openosd/scrub performance issue: multiple redundant "updates-applied" scrub events
% Done:
0%
Source:
Tags:
Backport:
pacific
Regression:
No
Severity:
3 - minor
Reviewed:
08/04/2021
Affected Versions:
ceph-qa-suite:
rados
Component(RADOS):
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
OSD logs show much too many unneeded UpdatesApplied ("updates were applied to the chunk selected for scrubbing").
See analysis below.
Updated by Ronen Friedman over 2 years ago
The refactored scrub code (in Pacific and forward) changed the handling
of applied updates notifications in PrimaryLogPG. What was a cheap function
call ("is Scrub interested in this update notification?") is now an event.
While semantics was not changed, there probably is a performance hit.
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