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Bug #459

closed

bonnie++ is slow on clustered mds

Added by Greg Farnum over 13 years ago. Updated over 13 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Greg Farnum
Category:
Clustered MDS
Target version:
-
% Done:

100%

Source:
Tags:
Backport:
Regression:
Severity:
Reviewed:
Affected Versions:
ceph-qa-suite:
Crash signature (v1):
Crash signature (v2):

Description

We tracked it down to a problem with cap revocation while deleting inodes. The MDS is requesting that the kclient drop all caps, but the kclient isn't responding right away so there's a ~5-second wait on each file deletion.
This looks like it may only occur on inodes that have migrated auth from one MDS to another.
Need to re-run with kernel logging on to find out what's going on, we think we've tracked it down to being an issue there rather than on the MDS side. Or it may be on both sides, who knows.

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