By default osd_scrub_max_interval and osd_deep_scrub_interval are 1 week 604800 seconds (60*60*24*7) and osd_scrub_min_interval is 1 day 86400 seconds (60*60*24). As long as osd_scrub_max_interval <= osd_deep_scrub_interval then the load won’t impact when deep scrub occurs. I suggest that osd_scrub_min_interval <= osd_scrub_max_interval <= osd_deep_scrub_interval.
I’d like to know how you have those 3 values set, so I can confirm that this explains the issue. David Zafman Senior Developer http://www.inktank.com http://www.redhat.com On Jun 23, 2014, at 7:01 PM, Christian Balzer <ch...@gol.com> wrote: > > Hello, > > On Mon, 23 Jun 2014 14:20:37 -0400 Gregory Farnum wrote: > >> Looks like it's a doc error (at least on master), but it might have >> changed over time. If you're running Dumpling we should change the >> docs. > > Nope, I'm running 0.80.1 currently. > > Christian > >> -Greg >> Software Engineer #42 @ http://inktank.com | http://ceph.com >> >> >> On Sun, Jun 22, 2014 at 10:18 PM, Christian Balzer <ch...@gol.com> wrote: >>> >>> Hello, >>> >>> This weekend I noticed that the deep scrubbing took a lot longer than >>> usual (long periods without a scrub running/finishing), even though the >>> cluster wasn't all that busy. >>> It was however busier than in the past and the load average was above >>> 0.5 frequently. >>> >>> Now according to the documentation "osd scrub load threshold" is >>> ignored when it comes to deep scrubs. >>> >>> However after setting it to 1.5 and restarting the OSDs the floodgates >>> opened and all those deep scrubs are now running at full speed. >>> >>> Documentation error or did I "unstuck" something by the OSD restart? >>> >>> Regards, >>> >>> Christian >>> -- >>> Christian Balzer Network/Systems Engineer >>> ch...@gol.com Global OnLine Japan/Fusion Communications >>> http://www.gol.com/ >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > -- > Christian Balzer Network/Systems Engineer > ch...@gol.com Global OnLine Japan/Fusion Communications > http://www.gol.com/ > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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