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Fix #52591

mds: mds_oft_prefetch_dirfrags = false is not qa tested

Added by Dan van der Ster over 1 year ago. Updated 5 months ago.

Status:
Resolved
Priority:
High
Category:
-
Target version:
% Done:

0%

Source:
Community (dev)
Tags:
backport_processed
Backport:
pacific
Reviewed:
Affected Versions:
ceph-qa-suite:
fs
Component(FS):
MDS, qa-suite
Labels (FS):
qa, task(easy)
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

We'd like to use `mds_oft_prefetch_dirfrags = false` in production; in our tests it demonstrates a massive speedup when failing over to a standby MDS. (prefetch enabled makes rejoin take up to 10 minutes on our busiest cluster; prefect disabled gives us a near-instantaneous active state in the test cluster)

But we didn't find any qa testing with `mds_oft_prefetch_dirfrags = false`: how can we easily add this permutation to the test framework.
Or, should we just make `mds_oft_prefetch_dirfrags = false` the new default?


Related issues

Copied to CephFS - Backport #53761: pacific: mds: mds_oft_prefetch_dirfrags = false is not qa tested Resolved

History

#1 Updated by Patrick Donnelly over 1 year ago

  • Tracker changed from Bug to Fix
  • Subject changed from mds_oft_prefetch_dirfrags = false is not qa tested to mds: mds_oft_prefetch_dirfrags = false is not qa tested
  • Priority changed from Normal to High
  • Target version set to v17.0.0
  • Source set to Community (dev)
  • Backport set to pacific
  • Component(FS) qa-suite added
  • Labels (FS) qa, task(easy) added

Thanks for bringing this up Dan. We'll try to have someone work on this.

#2 Updated by Patrick Donnelly over 1 year ago

  • Assignee set to Ramana Raja

#3 Updated by Ramana Raja over 1 year ago

Patrick suggested that we have this setting in the thrasher suite.

#4 Updated by Patrick Donnelly about 1 year ago

  • Status changed from New to Fix Under Review
  • Assignee changed from Ramana Raja to Arthur Outhenin-Chalandre
  • Pull request ID set to 44067

#5 Updated by Venky Shankar about 1 year ago

  • Status changed from Fix Under Review to Pending Backport

#6 Updated by Backport Bot about 1 year ago

  • Copied to Backport #53761: pacific: mds: mds_oft_prefetch_dirfrags = false is not qa tested added

#7 Updated by Backport Bot 6 months ago

  • Tags set to backport_processed

#8 Updated by Venky Shankar 5 months ago

  • Status changed from Pending Backport to Resolved

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