Am 02.01.2014 19:06, schrieb Dietmar Maurer:
# 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)
Did you miss the replication factor? I think it should be:
40MB/s*6/3 => 80MB/s
And why does 'osb bench' results in 55MB/s?
no replication involved?
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?
Never seen one.
Stefan
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