Could you give some perf counter from rbd client side? Such as op latency? On Wed, Jul 2, 2014 at 9:01 PM, Stefan Priebe - Profihost AG <s.priebe at profihost.ag> wrote: > 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 >> > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Best Regards, Wheat
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