Hi Francois, I have seen reports of poor performance from Nautilus onwards and you might be hit by this. This might require a ticket. There is a hypothesis that a regression occurred that affects the cluster's ability to run background operations properly. What you observe should not happen and I didn't see any of this on mimic when removing a 120TB file system. Best regards, ================= Frank Schilder AIT Risø Campus Bygning 109, rum S14 ________________________________________ From: Francois Legrand <fleg@xxxxxxxxxxxxxx> Sent: 24 June 2020 00:25:03 To: Patrick Donnelly; Frank Schilder Cc: ceph-users Subject: Re: Re: How to remove one of two filesystems Thanks a lot. It works. I could delete the filesystem and remove the pools (data and metadata). But now I am facing another problem which is that the removal of the pools seems to take a incredible time to free the space (the pool I deleted was about 100TB and in 36h I got back only 10TB). In the meantime, the cluster is extremely slow (a rbd extract takes ~30 mn for a 9 GB image and writing 10MB in cephfs takes half a minute !!) which makes the cluster almost unusable. It seems that the removal of deleted pg is done by deep-scrubs according to https://medium.com/opsops/a-very-slow-pool-removal-7089e4ac8301 But I couldn't find a way to speedup the process or to get back the cluster to a decent reactivity ? Do you have a suggestion ? F. Le 22/06/2020 à 16:40, Patrick Donnelly a écrit : On Mon, Jun 22, 2020 at 7:29 AM Frank Schilder <frans@xxxxxx><mailto:frans@xxxxxx> wrote: Use ceph fs set <fs_name> down true after this all mdses of fs fs_name will become standbys. Now you can cleanly remove everything. Wait for the fs to be shown as down in ceph status, the command above is non-blocking but the shutdown takes a long time. Try to disconnect all clients first. If you're planning to delete the file system, it is faster to just do: ceph fs fail <fs_name> which will remove all the MDS and mark the cluster as not joinable. See also: https://docs.ceph.com/docs/master/cephfs/administration/#taking-the-cluster-down-rapidly-for-deletion-or-disaster-recovery _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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