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Bug #22716
closedrbd snap create/rm takes 60s long
Status:
Resolved
Priority:
High
Assignee:
-
Target version:
-
% Done:
0%
Source:
Tags:
Backport:
luminous,jewel
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
when create snap from an image of huge size, like 64T, it takes for almost 60s in our server enviroment, even if the image exsits without actual data. more harmfully, it stalls the osd holding image header object for 100% cpu usage, impacting client IO drops very much, possibly down to zero.
when rm snap, it also take 60s, which is a long time.
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