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@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io