I've got a 3 node cluster where ceph osd perf reports reasonable fs_apply_latency for 2 out of 3 of my nodes (~30ms). But on the third node I've got latencies averaging 15000+ms for all OSDs. Running ceph 72.2 on Ubuntu 10.13. Each node has 30 HDDs with 6 SSDs for journals. iperf reports full bidirectional 10Gbps. fio locally on any of the nodes across all OSDs gives me ~4000MBps with clat's ~60ms. At first I thought this was an issue with my client running rbd but rados bench is also very slow for writes. ceph osd perf, rados bench, and fio output at: http://pastebin.com/Kze0AKnr _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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