Hi Alexandre, Am 17.03.2014 07:03, schrieb Alexandre DERUMIER: > Hello, > > I'm looking to build a full ssd cluster (I have mainly random io workload), > > I would like to known how many iops can we expect, by osd ? > > I have read on inktank doc, about 4000 iops by osd(that enough for me). Is is true ? I don't get / see these values. But may be replication of 3 is the problem here. per qemu VM i'm not able to get more than 15 000 iop/s no idea what is the limiting factor. With iSCSI and the same network i get around 120000 IOP/s with qemu. > What is the bottleneck ? osd cpu limited ? At 15 000 iop/s for one VM i have a 100-180% CPU Usage per OSD process on a 3.7 Ghz E5 Xeon. So may be CPU is a Problem. Greets, Stefan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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