Am 02.07.2014 00:51, schrieb Gregory Farnum: > On Thu, Jun 26, 2014 at 11:49 PM, Stefan Priebe - Profihost AG > <s.priebe at profihost.ag> wrote: >> Hi Greg, >> >> Am 26.06.2014 02:17, schrieb Gregory Farnum: >>> Sorry we let this drop; we've all been busy traveling and things. >>> >>> There have been a lot of changes to librados between Dumpling and >>> Firefly, but we have no idea what would have made it slower. Can you >>> provide more details about how you were running these tests? >> >> it's just a normal fio run: >> fio --ioengine=rbd --bs=4k --name=foo --invalidate=0 >> --readwrite=randwrite --iodepth=32 --rbdname=fio_test2 --pool=teststor >> --runtime=90 --numjobs=32 --direct=1 --group >> >> Running one time with firefly libs and one time with dumpling libs. >> Traget is always the same pool on a firefly ceph storage. > > What's the backing cluster you're running against? What kind of CPU > usage do you see with both? 25k IOPS is definitely getting up there, > but I'd like some guidance about whether we're looking for a reduction > in parallelism, or an increase in per-op costs, or something else. Hi Greg, i don't have that test cluster anymore. It had to go into production with dumpling. So i can't tell you. Sorry. Stefan > -Greg > Software Engineer #42 @ http://inktank.com | http://ceph.com > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
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