From: Samuel Just <sjust@redhat.com>
To: ceph-devel <ceph-devel@vger.kernel.org>,
"'ceph-users@lists.ceph.com' (ceph-users@lists.ceph.com)"
<ceph-users@lists.ceph.com>
Subject: Discuss: New default recovery config settings
Date: Fri, 29 May 2015 17:47:13 -0400 (EDT) [thread overview]
Message-ID: <1394947829.9758745.1432936033017.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <1939533999.9756941.1432935747903.JavaMail.zimbra@redhat.com>
Many people have reported that they need to lower the osd recovery config options to minimize the impact of recovery on client io. We are talking about changing the defaults as follows:
osd_max_backfills to 1 (from 10)
osd_recovery_max_active to 3 (from 15)
osd_recovery_op_priority to 1 (from 10)
osd_recovery_max_single_start to 1 (from 5)
We'd like a bit of feedback first though. Is anyone happy with the current configs? Is anyone using something between these values and the current defaults? What kind of workload? I'd guess that lowering osd_max_backfills to 1 is probably a good idea, but I wonder whether lowering osd_recovery_max_active and osd_recovery_max_single_start will cause small objects to recover unacceptably slowly.
Thoughts?
-Sam
next parent reply other threads:[~2015-05-29 21:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1939533999.9756941.1432935747903.JavaMail.zimbra@redhat.com>
2015-05-29 21:47 ` Samuel Just [this message]
2015-05-29 22:16 ` Discuss: New default recovery config settings Milosz Tanski
[not found] ` <1394947829.9758745.1432936033017.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-05-29 22:16 ` Josef Johansson
[not found] ` <CAOnYue-zF1driSi1oxGCQ8Vh1UcG=viT5P8AeHA3R1NCca1o6w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-29 22:56 ` Stillwell, Bryan
2015-05-29 22:33 ` Somnath Roy
2015-05-29 23:17 ` Gregory Farnum
[not found] ` <CAC6JEv8LyM1SRsOszDCj6tLxhZ=hvrEkinDARW8BvyQHDCz+LQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-01 7:43 ` Jan Schermer
[not found] ` <9555849C-7C6E-485E-B60C-BB4996F96E32-SB6/BxVxTjHtwjQa/ONI9g@public.gmane.org>
2015-06-01 8:13 ` Lionel Bouton
2015-06-01 8:57 ` [ceph-users] " huang jun
2015-06-01 9:01 ` Jan Schermer
2015-06-02 1:39 ` Paul Von-Stamwitz
[not found] ` <622F4407872BA447A16110F65453358C03DFB21C4B5F-Y+un6SQecilYCZvkXUWeucM6rOWSkUom@public.gmane.org>
2015-06-02 3:43 ` Gregory Farnum
[not found] ` <CAC6JEv-i6tOwPBDjP++EW4FxAKZ_X_prEZ8YZOpLq-RTP1ZguQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 22:44 ` Sage Weil
2015-06-03 22:55 ` Gregory Farnum
[not found] ` <alpine.DEB.2.00.1506031541200.26591-vIokxiIdD2AQNTJnQDzGJqxOck334EZe@public.gmane.org>
2015-06-04 21:01 ` Mike Dawson
[not found] ` <5570BCAE.5050509-ffsCFlcjuZBWk0Htik3J/w@public.gmane.org>
2015-06-04 23:24 ` Scottix
[not found] ` <CANKFHZ_yWaUYoKt3X5RE8BewRqhM_nvfmKwJPRPcFz444q_nWA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-23 4:09 ` Shinobu
2015-05-31 14:29 ` Justin Erenkrantz
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