Re: CephFS snaptrim bug?

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Hi,

On 2/23/22 21:43, Linkriver Technology wrote:
> Could someone shed some light please? Assuming that snaptrim didn't run to
> completion, how can I manually delete objects from now-removed snapshots? I
> believe this is what the Ceph documentation calls a "backwards scrub" - but I
> didn't find anything in the Ceph suite that can run such a scrub. This pool is
> filling up fast, I'll throw in some more OSDs for the moment to buy some time,
> but I certainly would appreciate your help!

You are probably hitting a bug related to the 52026 tracker [1]. You can
probably guess all the pgs that still needs snaptrim by checking
snaptrimq_len with the command `ceph pg dump pgs`. Basically all the pgs
that have a non zero value need snaptrim and you can trigger the
snaptrim by re-peering them.

[1]: https://tracker.ceph.com/issues/52026

Cheers,

-- 
Arthur Outhenin-Chalandre
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