how about adding: --sync=1 --numjobs=1 to the command as well?
On Sat, Mar 9, 2019 at 12:09 PM Vitaliy Filippov <vita...@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 > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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