Igor -- Good command to know, but this is still very slow on an erasure pool. For example, on my cluster it took 10 seconds with rados bench to write 10,000 40K size objects to an ecpool. And it took almost 6 minutes to delete them using the command below. -- Tom > -----Original Message----- > From: Podoski, Igor [mailto:Igor.Podoski@xxxxxxxxxxxxxx] > Sent: Thursday, June 25, 2015 1:06 AM > To: Deneau, Tom; Dałek, Piotr; ceph-devel > Subject: RE: deleting objects from a pool > > Hi, > > It appears, that cleanup can be used as a purge: > > rados -p <poolname> cleanup --prefix "" > > Regards, > Igor. > > > -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > owner@xxxxxxxxxxxxxxx] On Behalf Of Deneau, Tom > Sent: Wednesday, June 24, 2015 10:22 PM > To: Dałek, Piotr; ceph-devel > Subject: RE: deleting objects from a pool > > 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-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > > owner@xxxxxxxxxxxxxxx] 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-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > > > owner@xxxxxxxxxxxxxxx] 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 majordomo@xxxxxxxxxxxxxxx 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 majordomo@xxxxxxxxxxxxxxx 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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
