From: Sage Weil <sage@newdream.net>
To: Jim Schutt <jaschut@sandia.gov>
Cc: Gregory Farnum <gregory.farnum@dreamhost.com>,
"ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: cosd multi-second stalls cause "wrongly marked me down"
Date: Wed, 16 Feb 2011 16:50:58 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.1102161649560.11150@cobra.newdream.net> (raw)
In-Reply-To: <1297893011.25491.124.camel@sale659.sandia.gov>
On Wed, 16 Feb 2011, Jim Schutt wrote:
> On Wed, 2011-02-16 at 14:40 -0700, Gregory Farnum wrote:
> > On Wednesday, February 16, 2011 at 1:25 PM, Jim Schutt wrote:
> > > Hi,
> > >
> > > I've been testing v0.24.3 w/ 64 clients against
> > > 1 mon, 1 mds, 96 osds. Under heavy write load I
> > > see:
> > > [WRN] map e7 wrongly marked me down or wrong addr
> > >
> > > I was able to sort through the logs and discover that when
> > > this happens I have large gaps (10 seconds or more) in osd
> > > heatbeat processing. In those heartbeat gaps I've discovered
> > > long periods (5-15 seconds) where an osd logs nothing, even
> > > though I am running with debug osd/filestore/journal = 20.
> > >
> > > Is this a known issue?
> >
> > You're running on btrfs?
>
> Yep.
Are the cosd log files on the same btrfs volume as the btrfs data, or
elsewhere? The heartbeat thread takes some pains to avoid any locks that
may be contented and do avoid any disk io, so in theory a btrfs stall
shouldn't affect anything. We may have missed something.. do you have a
log showing this in action?
sage
>
> > We've come across some issues involving very long sync times that I believe manifest like this. Sage is looking into them, although it's delayed at the moment thanks to FAST 11. :)
>
> OK, great.
>
> -- Jim
>
> > -Greg
> >
>
>
>
> --
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>
next prev parent reply other threads:[~2011-02-17 0:49 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 21:25 cosd multi-second stalls cause "wrongly marked me down" Jim Schutt
2011-02-16 21:37 ` Wido den Hollander
2011-02-16 21:51 ` Jim Schutt
2011-02-16 21:40 ` Gregory Farnum
2011-02-16 21:50 ` Jim Schutt
2011-02-17 0:50 ` Sage Weil [this message]
2011-02-17 0:54 ` Sage Weil
2011-02-17 15:46 ` Jim Schutt
2011-02-17 16:11 ` Sage Weil
2011-02-17 23:31 ` Jim Schutt
2011-02-18 7:13 ` Sage Weil
2011-02-18 17:04 ` Jim Schutt
2011-02-18 17:15 ` Gregory Farnum
2011-02-18 18:41 ` Jim Schutt
2011-02-18 19:07 ` Colin McCabe
2011-02-18 20:48 ` Jim Schutt
2011-02-18 20:58 ` Sage Weil
2011-02-18 21:09 ` Jim Schutt
2011-03-09 16:02 ` Jim Schutt
2011-03-09 17:07 ` Gregory Farnum
2011-03-09 18:36 ` Jim Schutt
2011-03-09 19:37 ` Gregory Farnum
2011-03-10 23:09 ` Jim Schutt
2011-03-10 23:21 ` Sage Weil
2011-03-10 23:32 ` Jim Schutt
2011-03-10 23:40 ` Sage Weil
2011-03-11 14:51 ` Jim Schutt
2011-03-11 18:26 ` Jim Schutt
2011-03-11 18:37 ` Jim Schutt
2011-03-11 18:37 ` Sage Weil
2011-03-11 18:51 ` Jim Schutt
2011-03-11 19:09 ` Gregory Farnum
2011-03-11 19:13 ` Yehuda Sadeh Weinraub
2011-03-11 19:17 ` Yehuda Sadeh Weinraub
2011-03-11 19:16 ` Jim Schutt
2011-03-11 21:13 ` Jim Schutt
2011-03-11 21:37 ` Sage Weil
2011-03-11 22:21 ` Jim Schutt
2011-03-11 22:26 ` Jim Schutt
2011-03-11 22:45 ` Sage Weil
2011-03-11 23:29 ` Jim Schutt
2011-03-30 21:26 ` Jim Schutt
2011-03-30 21:55 ` Sage Weil
2011-03-31 14:16 ` Jim Schutt
2011-03-31 16:25 ` Sage Weil
2011-03-31 17:00 ` Jim Schutt
2011-03-31 17:10 ` Jim Schutt
2011-03-31 17:24 ` Sage Weil
2011-03-31 18:08 ` Jim Schutt
2011-03-31 18:41 ` Sage Weil
2011-04-01 22:38 ` Jim Schutt
2011-02-23 17:52 ` Jim Schutt
2011-02-23 18:12 ` Gregory Farnum
2011-02-23 18:54 ` Sage Weil
2011-02-23 19:12 ` Gregory Farnum
2011-02-23 19:23 ` Jim Schutt
2011-02-23 20:27 ` Gregory Farnum
2011-03-02 0:53 ` Sage Weil
2011-03-02 15:21 ` Jim Schutt
2011-03-02 17:10 ` Sage Weil
2011-03-02 20:54 ` Jim Schutt
2011-03-02 21:45 ` Sage Weil
2011-03-02 21:59 ` Jim Schutt
2011-03-02 22:57 ` Jim Schutt
2011-03-02 23:20 ` Gregory Farnum
2011-03-02 23:25 ` Jim Schutt
2011-03-02 23:33 ` Gregory Farnum
2011-03-03 2:26 ` Colin McCabe
2011-03-03 20:03 ` Jim Schutt
2011-03-03 20:47 ` Jim Schutt
2011-03-03 20:55 ` Yehuda Sadeh Weinraub
2011-03-03 21:45 ` Jim Schutt
2011-03-03 22:22 ` Sage Weil
2011-03-03 22:34 ` Jim Schutt
2011-03-03 21:53 ` Colin McCabe
2011-03-03 23:06 ` Jim Schutt
2011-03-03 23:30 ` Colin McCabe
2011-03-03 23:37 ` Jim Schutt
2011-03-03 5:03 ` Sage Weil
2011-03-03 16:35 ` Jim Schutt
2011-03-03 17:28 ` Jim Schutt
2011-03-03 18:04 ` Sage Weil
2011-03-03 18:42 ` Jim Schutt
2011-03-03 18:51 ` Sage Weil
2011-03-03 19:39 ` Jim Schutt
2011-04-08 16:23 ` Jim Schutt
2011-04-08 20:50 ` Sage Weil
2011-04-08 22:11 ` Jim Schutt
2011-04-08 23:10 ` Colin McCabe
2011-04-11 14:41 ` Jim Schutt
2011-04-11 16:25 ` Sage Weil
2011-04-11 20:14 ` Jim Schutt
2011-04-11 21:18 ` Jim Schutt
2011-04-11 23:23 ` Sage Weil
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