Hi,
we're experiencing some strange issues running ceph 0.87 in our, I
think, quite large cluster (taking number of objects as a measurement).
mdsmap e721086: 1/1/1 up {0=storagemds01=up:active}, 2 up:standby
osdmap e143048: 92 osds: 92 up, 92 in
flags noout,noscrub,nodeep-scrub
pgmap v45790682: 4736 pgs, 6 pools, 109 TB data, 3841 Mobjects
255 TB used, 48892 GB / 303 TB avail
Putting some higher load via cephfs on the cluster leads to messages
like mds0: Client X failing to respond to capability release after some
minutes. Requests from other clients start to block after a while.
Rebooting the client named client resolves the issue.
Clients are a mix of CentOS6 & CentOS7 running kernel
4.1.4-1.el7.elrepo.x86_64
4.1.4-1.el6.elrepo.x86_64
4.4.0-2.el6.elrepo.x86_64
but other releases show the same behavior.
Currently running 3 OSD Nodes and 3 combined MDS/MON-Nodes.
What information do you need to further track down this issue? Quite
unsure so this is only a rough overview of the setup.
We have another issue with sometimes broken files ; bad checksums after
storage, but I think I will start a new thread for this ;-)
Thanks!
--
Kind Regards
Michael
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