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Bug #24467
closedmds: low wrlock efficiency due to dirfrags traversal
Status:
Resolved
Priority:
Normal
Assignee:
Category:
Performance/Resource Usage
Target version:
% Done:
0%
Source:
Development
Tags:
Backport:
luminous,mimic
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(FS):
MDS
Labels (FS):
multimds
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
Recently, when trying to create/remove massive files/dirs(7x10^6) within a common directory, we found that as the creations go on, the time to create a single file/dir increases. After a series analysis, we found that this is due to the traversal of dirfrags the number of which increases exponentially as the number of subdirs/subfiles increases.
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