> > # iostat -x 5 (after about 30 seconds) > > Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz > > avgqu-sz > await r_await w_await svctm %util > > sdb 0.00 3.80 0.00 187.40 0.00 84663.60 903.56 > > 157.62 > 796.93 0.00 796.93 5.34 100.00 > > sdc 0.00 30.00 0.00 169.60 0.00 72501.80 854.97 > > 47.33 > 279.14 0.00 279.14 5.58 94.62 > > > > so your disks are completely utilized and can't keep up see %util and await.
But it say it writes at 80MB/s, so that would be about 40MB/s for data? And 40*6=240 (not 190) And why does 'osb bench' results in 55MB/s? In reality I just get 30MB/s (per OSD), and that is really not very much. fio and other benchmarks reports random 4M writes at >100MB/s. I think it would be great to have some kind of formula to compute overall throughput form a simply OSD benchmark and the number of OSDs. Does such thing exists? _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
