On Tue, 16 Feb 2010, Talyansky, Roman wrote: > Hi Sage, > > I am trying to reproduce the hang with the latest client and servers. > I am able to start the servers, however mount fails with input/output error > 5. The dmesg listing shows the following info: > > [17008.244739] ceph: loaded 0.18.0 (mon/mds/osd proto 15/30/22) > [17015.888143] ceph: mon0 10.55.147.70:6789 connection failed > [17025.880170] ceph: mon0 10.55.147.70:6789 connection failed > [17035.880121] ceph: mon0 10.55.147.70:6789 connection failed > [17045.880189] ceph: mon0 10.55.147.70:6789 connection failed > [17055.880130] ceph: mon0 10.55.147.70:6789 connection failed > [17065.880113] ceph: mon0 10.55.147.70:6789 connection failed > [17075.880170] ceph: mon0 10.55.147.70:6789 connection failed > > The server is reachable, as the following command output shows: > > $ nc 10.55.147.83 6789 > ceph v027
It looks like dmesg shows it trying to connect to the monitor at .70, but you tested .83? > I started running the experiments with ceph 0.18 using the > configuration, where clients and servers run on separate nodes. It turns > out that the performance is extremely bad. Looking at dmesg trace I see > ceph-related faults (the partial trace is attached to the email). The oops in the attached trace.txt was fixed last week in the unstable code. It also looks like the IO is synchronous, which may have something to do with your performance. Are you mounting with -o sync or using direct IO, or are multiple clients reading and writing to the same file or something? Thanks- sage ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ Ceph-devel mailing list Ceph-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ceph-devel
