On 01/09/14 12:36, Mark Kirkwood wrote: > Allegedly this model ssd (128G m550) can do 75K 4k random write IOPS > (running fio on the filesystem I've seen 70K IOPS so is reasonably > believable). So anyway we are not getting anywhere near the max IOPS > from our devices. > > We use the Intel S3700 for production ceph servers, so I'll see if we > have any I can test on - would be interesting to see if I find the same > 3.5K issue or not. > Something I should have tried earlier, sorry - rebuilding with Firefly branch: $ ceph --version ceph version 0.80.5-171-gca3ac90 (ca3ac907aa73c5d77760e12da6f1509ea860e894) I'm seeing just over 4K IOPS on all the write tests, no matter whether I use one or both ssds - which i suspiciously close to what Sebastian was getting. So looks like a Firefly bottleneck - and master branch has some significant speedups. Regards Mark
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