From: "Jim Schutt" <jaschut@sandia.gov>
To: Jim Schutt <jaschut@sandia.gov>
Cc: Sage Weil <sage@newdream.net>,
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: Mon, 11 Apr 2011 14:14:25 -0600 [thread overview]
Message-ID: <4DA36121.40808@sandia.gov> (raw)
In-Reply-To: <4D9F87F7.6090203@sandia.gov>
Jim Schutt wrote:
> Sage Weil wrote:
>
>>
>> I guess the other thing that would help to confirm this is to just
>> halve the number of OSDs on your machines in a test and see if the
>> problem goes away.
>
> I was going to try this first, exactly because it seems like
> a definitive test.
>
FWIW, I've done some testing on a file system using 48 OSDs
rather than 96.
With the 96-OSD version of this test (12 servers, 8 OSD/server),
with 64 clients writing a total of 128 GiB data, I usually see
multiple instances (5-6, or more, is common) of OSDs getting
marked down, noticing they were wrongly marked down, and coming back.
With the 48-OSD version of the file system (12 servers, 4 OSD/server)
I ran multiple tests, totaling several TiB data, and experienced
exactly one instance on an OSD being wrongly marked down.
-- Jim
next prev parent reply other threads:[~2011-04-11 20:14 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
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 [this message]
2011-04-11 21:18 ` Jim Schutt
2011-04-11 23:23 ` Sage Weil
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4DA36121.40808@sandia.gov \
--to=jaschut@sandia.gov \
--cc=ceph-devel@vger.kernel.org \
--cc=gregory.farnum@dreamhost.com \
--cc=sage@newdream.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.