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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