I don't see any commits that would be likely to affect that between 0.80.7 and 0.80.9.
Is this after upgrading an existing cluster? Could this be due to fs aging beneath your osds? How are you measuring create/delete performance? You can try increasing rbd concurrent management ops in ceph.conf on the cinder node. This affects delete speed, since rbd tries to delete each object in a volume. Josh From: shiva rkreddy <shiva.rkre...@gmail.com> Sent: Apr 14, 2015 5:53 AM To: Josh Durgin Cc: Ken Dreyer; Sage Weil; Ceph Development; ceph-us...@ceph.com Subject: Re: v0.80.8 and librbd performance > Hi Josh, > > We are using firefly 0.80.9 and see both cinder create/delete numbers slow > down compared 0.80.7. > I don't see any specific tuning requirements and our cluster is run pretty > much on default configuration. > Do you recommend any tuning or can you please suggest some log signatures we > need to be looking at? > > Thanks > shiva > > On Wed, Mar 4, 2015 at 1:53 PM, Josh Durgin <jdur...@redhat.com> wrote: >> >> On 03/03/2015 03:28 PM, Ken Dreyer wrote: >>> >>> On 03/03/2015 04:19 PM, Sage Weil wrote: >>>> >>>> Hi, >>>> >>>> This is just a heads up that we've identified a performance regression in >>>> v0.80.8 from previous firefly releases. A v0.80.9 is working it's way >>>> through QA and should be out in a few days. If you haven't upgraded yet >>>> you may want to wait. >>>> >>>> Thanks! >>>> sage >>> >>> >>> Hi Sage, >>> >>> I've seen a couple Redmine tickets on this (eg >>> http://tracker.ceph.com/issues/9854 , >>> http://tracker.ceph.com/issues/10956). It's not totally clear to me >>> which of the 70+ unreleased commits on the firefly branch fix this >>> librbd issue. Is it only the three commits in >>> https://github.com/ceph/ceph/pull/3410 , or are there more? >> >> >> Those are the only ones needed to fix the librbd performance >> regression, yes. >> >> Josh >> >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >
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