On 19.09.2017 20:58, Gregory Farnum wrote: > You've probably run in to http://tracker.ceph.com/issues/16010 — do you have very large directories? (Or perhaps just a whole bunch of unlinked files which the MDS hasn't managed to trim yet?) thank you for pointing us to the right direction. I had found issue #16010 before but had ruled it out as reason for the outage. As the cluster's overall health was ok, we decided to anticipate the pending upgrade to luminous, now profitting from multiple active MDSes and directory fragmentation. ciao Christian
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