On 07/03/2015 10:25 AM, Mathias Buresch wrote: > Hi there, > > maybe you could be so kind and help me with following issue: > > We running Ceph FS but there's repeatedly a problem with the MDS. >
What version of Ceph are you running? > Sometimes following error occurs: "mds0: Client 701782 failing to > respond to capability release" > Listing the session informations shows that the "num_caps" on that > Client is much more than on the other Clients. ( see also -> attachement ) > > The problem is that the load on one of the server is increasing to > really high value ( 80 to 100 ) independent of client which is complaining. > > I guess my problem is also that I dont really understand the meaning of > those "capabilties". > > Following facts (let me know if you need more): > > * CEPH-FS-Client, MDS, MON, OSD all on same server > * Kernel-Client (Kernel: 3.14.16-031416-generic) Kernel 3.14 is rather old when it comes to CephFS. I would recommend at least 3.19 due to various fixes. Could you give that a try? Wido > * MDS config > o only raised "mds cache size = 5000000" (because before there > was error "failing to respond to cache pressure") > > > Best regards > Mathias > > > > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
