Hm....nice Thx guys
On 13 March 2015 at 12:33, Henrik Korkuc <li...@kirneh.eu> wrote: > I think settings apply to both kinds of scrubs > > > On 3/13/15 13:31, Andrija Panic wrote: > > Interesting....thx for that Henrik. > > BTW, my placements groups are arround 1800 objects (ceph pg dump) - > meainng max of 7GB od data at the moment, > > regular scrub just took 5-10sec to finish. Deep scrub would I guess take > some minutes for sure > > What about deepscrub - timestamp is still some months ago, but regular > scrub is fine now with fresh timestamp...? > > I don't see max deep scrub setings - or are these settings applied in > general for both kind on scrubs ? > > Thanks > > > > On 13 March 2015 at 12:22, Henrik Korkuc <li...@kirneh.eu> wrote: > >> I think that there will be no big scrub, as there are limits of maximum >> scrubs at a time. >> http://ceph.com/docs/master/rados/configuration/osd-config-ref/#scrubbing >> >> If we take "osd max scrubs" which is 1 by default, then you will not get >> more than 1 scrub per OSD. >> >> I couldn't quickly find if there are cluster wide limits. >> >> >> On 3/13/15 10:46, Wido den Hollander 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 >> listceph-us...@lists.ceph.comhttp://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> _______________________________________________ >> ceph-users mailing >> listceph-us...@lists.ceph.comhttp://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 >> >> > > > -- > > Andrija Panić > > > -- Andrija Panić
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