On 13-03-15 09:42, Andrija Panic wrote: > Hi all, > > I have set nodeep-scrub and noscrub while I had small/slow hardware for > the cluster. > It has been off for a while now. > > Now we are upgraded with hardware/networking/SSDs and I would like to > activate - or unset these flags. > > Since I now have 3 servers with 12 OSDs each (SSD based Journals) - I > was wondering what is the best way to unset flags - meaning if I just > unset the flags, should I expect that the SCRUB will start all of the > sudden on all disks - or is there way to let the SCRUB do drives one by > one... >
So, I *think* that unsetting these flags will trigger a big scrub, since all PGs have a very old last_scrub_stamp and last_deepscrub_stamp You can verify this with: $ ceph pg <pgid> query A solution would be to scrub each PG manually first in a timely fashion. $ ceph pg scrub <pgid> That way you set the timestamps and slowly scrub each PG. When that's done, unset the flags. Wido > In other words - should I expect BIG performance impact or....not ? > > Any experience is very appreciated... > > Thanks, > > -- > > Andrija Panić > > > _______________________________________________ > 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
