On 2/11/20 2:53 PM, Marc Roos wrote: > > Say I think my cephfs is slow when I rsync to it, slower than it used to > be. First of all, I do not get why it reads so much data. I assume the > file attributes need to come from the mds server, so the rsync backup > should mostly cause writes not? > Are you running one or multiple MDS? I've seen cases where the synchronization between the different MDS slow down rsync. The problem is that rsync creates and renames files a lot. When doing this with small files it can be very heavy for the MDS. Wido > I think it started being slow, after enabling snapshots on the file > system. > > - how can I determine if mds_cache_memory_limit = 8000000000 is still > correct? > > - how can I test the mds performance from the command line, so I can > experiment with cpu power configurations, and see if this brings a > significant change? > _______________________________________________ > 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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