[ceph-users] 3-node cluster with 3 x Intel Optane 900P - very low benchmarked performance (200 IOPS)?

solarflow99 solarflow99 at gmail.com
Mon Mar 11 13:59:06 PDT 2019


how about adding:  --sync=1 --numjobs=1  to the command as well?



On Sat, Mar 9, 2019 at 12:09 PM Vitaliy Filippov <vitalif at yourcmc.ru> wrote:

> There are 2:
>
> fio -ioengine=rbd -direct=1 -name=test -bs=4k -iodepth=1 -rw=randwrite
> -pool=bench -rbdname=testimg
>
> fio -ioengine=rbd -direct=1 -name=test -bs=4k -iodepth=128 -rw=randwrite
> -pool=bench -rbdname=testimg
>
> The first measures your min possible latency - it does not scale with the
> number of OSDs at all, but it's usually what real applications like
> DBMSes
> need.
>
> The second measures your max possible random write throughput which you
> probably won't be able to utilize if you don't have enough VMs all
> writing
> in parallel.
>
> --
> With best regards,
>    Vitaliy Filippov
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> ceph-users at lists.ceph.com
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>
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