> On Feb 3, 2016, at 17:39, Michael Metz-Martini | SpeedPartner GmbH > <m...@speedpartner.de> wrote: > > Hi, > > Am 03.02.2016 um 10:26 schrieb Gregory Farnum: >> On Tue, Feb 2, 2016 at 10:09 PM, Michael Metz-Martini | SpeedPartner >> GmbH <m...@speedpartner.de> wrote: >>> 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. >> There are some bugs around this functionality, but I *think* your >> clients are new enough it shouldn't be an issue. >> However, it's entirely possible your clients are actually making use >> of enough inodes that the MDS server is running into its default >> limits. If your MDS has memory available, you probably want to >> increase the cache size from its default 100k (mds cache size = X). > mds_cache_size is already 4000000 and so a lot higher than usual. > (google said I should increase ...) > >> Or maybe your kernels are too old; Zheng would know. > We're already far away from centos-Dist-Kernel. but upgrading to 4.4.x > for the clients should be possible if that might help. >
mds log should contain messages like: client.XXXX isn't responding to mclientcaps(revoke) please send these messages to us. Regards Yan, Zheng > -- > Kind regards > Michael > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
