Hello, Which version of Ceph are you using? Are all of your OSDs currently up+in? If you're HEALTH_OK and all OSDs are up, snaptrim should work through the removed_snaps_queue and clear it over time, but I have seen cases where this seems to get stuck and restarting OSDs can help. Josh On Wed, Feb 7, 2024 at 12:01 PM localhost Liam <imluyuan@xxxxxxxxx> wrote: > > Hello, > > I'm encountering an issue with Ceph when using it as the backend storage for OpenStack Cinder. Specifically, after deleting RBD snapshots through Cinder, I've noticed a significant increase in the removed_snaps_queue entries within the corresponding Ceph pool. It seems to affect the pool's performance and space efficiency. > > I understand that snapshot deletion in Cinder is an asynchronous operation, and Ceph itself uses a lazy deletion mechanism to handle snapshot removal. However, even after allowing sufficient time, the entries in removed_snaps_queue do not decrease as expected. > > I have several questions for the community: > > Are there recommended methods or best practices for managing or reducing entries in removed_snaps_queue? > Is there any tool or command that can safely clear these residual snapshot entries without affecting the integrity of active snapshots and data? > Is this issue known, and are there any bug reports or plans for fixes related to it? > Thank you very much for your assistance! > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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