purging already destroyed OSD leads to degraded and misplaced objects?

[tobias tempel <tobias.tempel@xxxxxxx>]

Dear Cephers,

reorganizing one of our clusters i'm removing some hosts from it, taking "out" all OSDs on these hosts and waiting until all PGs are fine.

After stopping and destroying all OSDs on one host i notice, that "purge" of such destroyed OSDs temporarily leads to degraded and misplaced objects (tried "reweight 0" as well, same picture) .

Why that? I would - due to my limited experience - expect, that completely removing an already destroyed OSD could not have any effect on object placement at all.

This effect yet seems not to be a real problem, as recovery works fine ... but perhaps it indicates some other issue.

All of that takes place at Pacific 16.2.14 AlmaLinux 8.9, yes i know, there's some work to do.

Perhaps you can give me a hint, where to look, for an explanation?

Thank you

cheers, toBias

--

Tobias Tempel
Deutsches Elektronen-Synchrotron - IT
Notkestr. 85, 22607 Hamburg, Germany
email: tobias.tempel@xxxxxxx

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