On 13-03-15 12:00, Andrija Panic wrote: > Nice - so I just realized I need to manually scrub 1216 placements groups :) > With manual I meant using a script. Loop through 'ceph pg dump', get the PGid, issue a scrub, sleep for X seconds and issue the next scrub. Wido > > On 13 March 2015 at 10:16, Andrija Panic <andrija.panic@xxxxxxxxx > <mailto:andrija.panic@xxxxxxxxx>> wrote: > > Thanks Wido - I will do that. > > On 13 March 2015 at 09:46, Wido den Hollander <wido@xxxxxxxx > <mailto:wido@xxxxxxxx>> wrote: > > > > 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@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > -- > > Andrija Panić > > > > > -- > > Andrija Panić _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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