I've noticed that deleting objects from a basic k=2 m=1 erasure pool is much much slower than deleting a similar number of objects from a replicated size 3 pool (so the same number of files to be deleted). It looked like the ec pool object deletion was almost 20x slower. Is there a lot more work to be done to delete an ec pool object?
-- Tom > -----Original Message----- > From: ceph-devel-ow...@vger.kernel.org [mailto:ceph-devel- > ow...@vger.kernel.org] On Behalf Of Dalek, Piotr > Sent: Wednesday, June 24, 2015 11:56 AM > To: ceph-devel > Subject: Re: deleting objects from a pool > > > -----Original Message----- > > From: ceph-devel-ow...@vger.kernel.org [mailto:ceph-devel- > > ow...@vger.kernel.org] On Behalf Of Deneau, Tom > > Sent: Wednesday, June 24, 2015 6:44 PM > > > > I have benchmarking situations where I want to leave a pool around but > > delete a lot of objects from the pool. Is there any really fast way to do > that? > > I noticed rados rmpool is fast but I don't want to remove the pool. > > > > I have been spawning multiple threads, each deleting a subset of the > objects > > (which I believe is what rados bench write does) but even that can be very > > slow. > > For now, apart from "rados -p <poolname> cleanup" (which doesn't purge the > pool, but merely removes objects written during last benchmark run), the only > option is by brute force: > > for i in $(rados -p <poolname> ls); do (rados -p <poolname> rm $i &>/dev/null > &); done; > > There's no "purge pool" command in rados -- not yet, at least. I was thinking > about one, but never really had time to implement one. > > With best regards / Pozdrawiam > Piotr Dałek > -- > 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 -- 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
