If you have misplaced objects, the OSDs were marked out and ceph started to move the PGs to other nodes. This usually happens after 5 minutes of OSD downtime
If you do "ceph osd set noout" and restart a node it should backfill much faster, because it just needs to catch up with the changes. Mit freundlichen Grüßen - Boris Behrens > Am 19.09.2025 um 13:25 schrieb Niklas Hambüchen <m...@nh2.me>: > > I noticed that for my clusters, even a short 5-minute network outage or > single-host reboot can cause > > pgs: 5586988/366684639 objects misplaced (1.524%) > > which at the speed of > > recovery: 2.2 GiB/s, 676 objects/s > > can take hours to recover. > > I don't understand how this can be. If it's down for so short, how can > rebalancing can take this long? > > I'm using Ceph 19.2.2 on HDDs with SSDs as BlueStore "db" device. > Is this perhaps that writes of new files are written linearly to HDD (fast) > but recovery seeks around on my HDDs in random order (slow)? > > In any case, this asymmetry is quite annoying. > Could anything be done against it? > > Thanks! > Niklas > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
