is it possible to count open file descriptors in cephfs only? On Wed, Nov 16, 2016 at 2:12 PM Webert de Souza Lima <webert.b...@gmail.com> wrote:
> I'm sorry, by server, I meant cluster. > On one cluster the rate of files created and read is about 5 per second. > On another cluster it's from 25 to 30 files created and read per second. > > On Wed, Nov 16, 2016 at 2:03 PM Webert de Souza Lima < > webert.b...@gmail.com> wrote: > > Hello John. > > I'm sorry for the lack of information at the first post. > The same version is in use for servers and clients. > > About the workload, it varies. > On one server it's about *5 files created/written and then fully read per > second*. > On the other server it's about *5 to 6 times that number*, so a lot more, > but the problem does not escalate at the same proportion. > > *~# ceph -v* > ceph version 10.2.2 (45107e21c568dd033c2f0a3107dec8f0b0e58374) > > *~#dpkg -l | grep ceph* > ii ceph-fuse 10.2.2-1trusty > amd64 FUSE-based client for the Ceph distributed file system > > Some things are worth mentioning: > The service(1) that creates the file sends an async request to another > service(2) that reads it. > The service(1) that creates the file also deletes it when its client > closes the connection, so it can do so while the other service(2) is > trying to read it. i'm not sure what would happen here. > > > > On Wed, Nov 16, 2016 at 1:42 PM John Spray <jsp...@redhat.com> wrote: > > On Wed, Nov 16, 2016 at 3:15 PM, Webert de Souza Lima > <webert.b...@gmail.com> wrote: > > hi, > > > > I have many clusters running cephfs, and in the last 45 days or so, 2 of > > them started giving me the following message in ceph health: > > mds0: Client dc1-mx02-fe02:guest failing to respond to capability release > > > > When this happens, cephfs stops responding. It will only get back after I > > restart the failing mds. > > > > Algo, I get the following logs from ceph.log > > https://paste.debian.net/896236/ > > > > There was no change made that I can relate to this and I can't figure out > > what is happening. > > I have the usual questions: what ceph versions, what clients etc > (http://docs.ceph.com/docs/jewel/cephfs/early-adopters/#reporting-issues) > > Clients failing to respond to capability release are either buggy (old > kernels?) or it's also possible that you have a workload that is > holding an excessive number of files open. > > Cheers, > John > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > >
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