My guess is that this is because this setting can't be changed at runtime, though if so that's a new enforcement behaviour in Quincy that didn't exist in prior versions. I think what you want to do is 'config set osd osd_op_queue wpq' (assuming you want this set for all OSDs) and then restart your OSDs in a safe manner. Josh On Mon, Sep 18, 2023 at 4:43 AM Nikolaos Dandoulakis <nick.dan@ed.ac.uk> wrote:

Hi,

After upgrading our cluster to 17.2.6 all OSDs appear to have "osd_op_queue": "mclock_scheduler" (used to be wpq). As we see several OSDs reporting unjustifiable heavy load, we would like to revert this back to "wpq" but any attempt yells the following error:

root@store14:~# ceph tell osd.71 config set osd_op_queue wpq Error EPERM: error setting 'osd_op_queue' to 'wpq': (1) Operation not permitted

I cannot find anywhere why this is happening, I am guessing another setting needs to be changed as well. Has anybody resolved this?

Best, Nick The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. Is e buidheann carthannais a th' ann an Oilthigh Dhùn Èideann, clàraichte an Alba, àireamh clàraidh SC005336. _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io