On Wed, Jul 10, 2013 at 6:23 PM, ker can <kercan74@xxxxxxxxx> wrote: > > Now separating out the journal from data disk ... > > HDFS write numbers (3 disks/data node) > Average execution time: 466 > Best execution time : 426 > Worst execution time : 508 > > ceph write numbers (3 data disks/data node + 3 journal disks/data node) > Average execution time: 610 > Best execution time : 593 > Worst execution time : 635 > > So ceph was about 1.3x slower for the average case when journal & data are > separated .. a 70% improvement over the case where journal + data are on the > same disk - but still a bit off from the HDFS performance. Were you running 3 OSDs per node (an OSD per data/journal drive pair)? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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