Fix #52591: mds: mds_oft_prefetch_dirfrags = false is not qa tested - CephFS - Ceph

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Fix #52591

closed

mds: mds_oft_prefetch_dirfrags = false is not qa tested

Added by Dan van der Ster over 2 years ago. Updated over 1 year ago.

Status:

Resolved

Priority:

High

Assignee:

Arthur Outhenin-Chalandre

Category:

Target version:

Ceph - v17.0.0

% Done:

Source:

Community (dev)

Tags:

backport_processed

Backport:

pacific

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(FS):

MDS, qa-suite

Labels (FS):

qa, task(easy)

Pull request ID:

44067

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 1 (0 open — 1 closed)

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Updated by Patrick Donnelly over 2 years 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