On 04/27/2013 03:13 PM, Stefan Priebe wrote:
Hello list, today i was testing next branch against bobtail using a testcluster. I upgraded this bobtail one to next branch. I used QEMU 1.4.1 with librdb (for next branch i applied josh writeback patch). My Testsystem had 5 Hosts with one OSD each and set replication to 2. All values where done with 8 jobs in parallel using fio in Qemu Guest. bobtail: rand 4k: write: io=164316KB, bw=1783KB/s, iops=445, runt= 92136msec rand 4k: read : io=1117MB, bw=12710KB/s, iops=3177, runt= 90028msec seq 4m: write: io=8588MB, bw=97233KB/s, iops=23, runt= 90444msec seq 4m: read : io=83616MB, bw=951227KB/s, iops=232, runt= 90013msec next branch: write: io=177236KB, bw=1963KB/s, iops=490, runt= 90284msec read : io=223628KB, bw=2408KB/s, iops=601, runt= 92875msec write: io=25936MB, bw=294443KB/s, iops=71, runt= 90199msec read : io=69856MB, bw=794585KB/s, iops=193, runt= 90025msec
Was everything else the same between the tests? That does seem unusual. If it's easy for you to switch between bobtail and next, could you try some 4k rados bench read tests to see if it's also happening there?
Greets, Stefan -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
