Just remember that the warning appears at > 300 PGs/OSD, but the recommendation is 100. I would try to reduce your PGs by 1/3 or as close as you can to that. My learning cluster I had to migrate data between pools multiple times reducing the number of PGs as I went until I got to a more normal amount. It affected the clients a fair bit, but that cluster is still a 3 node cluster in active use.
Note that the data movements were rsync, dd, etc for rbds and cephfs. On Tue, Oct 3, 2017, 8:54 AM Andrei Mikhailovsky <and...@arhont.com> wrote: > Thanks for your suggestions and help > > Andrei > ------------------------------ > > *From: *"David Turner" <drakonst...@gmail.com> > *To: *"Jack" <c...@jack.fr.eu.org>, "ceph-users" < > ceph-users@lists.ceph.com> > *Sent: *Monday, 2 October, 2017 22:28:33 > *Subject: *Re: [ceph-users] decreasing number of PGs > > Adding more OSDs or deleting/recreating pools that have too many PGs are > your only 2 options to reduce the number of PG's per OSD. It is on the > Ceph roadmap, but is not a currently supported feature. You can > alternatively adjust the setting threshold for the warning, but it is still > a problem you should address in your cluster. > > On Mon, Oct 2, 2017 at 4:02 PM Jack <c...@jack.fr.eu.org> wrote: > >> You cannot; >> >> >> On 02/10/2017 21:43, Andrei Mikhailovsky wrote: >> > Hello everyone, >> > >> > what is the safest way to decrease the number of PGs in the cluster. >> Currently, I have too many per osd. >> > >> > Thanks >> > >> > >> > >> > _______________________________________________ >> > ceph-users mailing list >> > ceph-users@lists.ceph.com >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
