From: Carsten Aulbert <Carsten.Aulbert@aei.mpg.de>
To: Adam Goryachev <mailinglists@websitemanagers.com.au>
Cc: linux-raid@vger.kernel.org
Subject: Re: RAID performance
Date: Thu, 07 Feb 2013 11:29:26 +0100 [thread overview]
Message-ID: <51138206.5000301@aei.mpg.de> (raw)
In-Reply-To: <51137DFA.5020406@websitemanagers.com.au>
Hi
On 02/07/2013 11:12 AM, Adam Goryachev wrote:
> Do you have any information on what your workload is, or how/why these
> values might help?
Most of our data servers are exporting data read-only via NFS. It helped
well on these but more on download servers which allowed us to go from
200k 4MB downloads per day to 1M/day while adding new files constantly.
>
> You are changing values significantly from the default, and I am
> cautious that they may cause other issues. Also, someone else has
> advised to reduce nr_requests rather than increasing it?
>
I know, but these larger queues really helped a lot in re-ordering
requests to better match the hardware underneath - but again, this was
for hard drives with physical arms and not SSDs
Cheers
Carsten
--
Dr. Carsten Aulbert - Max Planck Institute for Gravitational Physics
Callinstrasse 38, 30167 Hannover, Germany
phone/fax: +49 511 762-17185 / -17193
https://wiki.atlas.aei.uni-hannover.de/foswiki/bin/view/ATLAS/WebHome
next prev parent reply other threads:[~2013-02-07 10:29 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-07 6:48 RAID performance Adam Goryachev
2013-02-07 6:51 ` Adam Goryachev
2013-02-07 8:24 ` Stan Hoeppner
2013-02-07 7:02 ` Carsten Aulbert
2013-02-07 10:12 ` Adam Goryachev
2013-02-07 10:29 ` Carsten Aulbert [this message]
2013-02-07 10:41 ` Adam Goryachev
2013-02-07 8:11 ` Stan Hoeppner
2013-02-07 10:05 ` Adam Goryachev
2013-02-16 4:33 ` RAID performance - *Slow SSDs likely solved* Stan Hoeppner
[not found] ` <cfefe7a6-a13f-413c-9e3d-e061c68dc01b@email.android.com>
2013-02-17 5:01 ` Stan Hoeppner
2013-02-08 7:21 ` RAID performance Adam Goryachev
2013-02-08 7:37 ` Chris Murphy
2013-02-08 13:04 ` Stan Hoeppner
2013-02-07 9:07 ` Dave Cundiff
2013-02-07 10:19 ` Adam Goryachev
2013-02-07 11:07 ` Dave Cundiff
2013-02-07 12:49 ` Adam Goryachev
2013-02-07 12:53 ` Phil Turmel
2013-02-07 12:58 ` Adam Goryachev
2013-02-07 13:03 ` Phil Turmel
2013-02-07 13:08 ` Adam Goryachev
2013-02-07 13:20 ` Mikael Abrahamsson
2013-02-07 22:03 ` Chris Murphy
2013-02-07 23:48 ` Chris Murphy
2013-02-08 0:02 ` Chris Murphy
2013-02-08 6:25 ` Adam Goryachev
2013-02-08 7:35 ` Chris Murphy
2013-02-08 8:34 ` Chris Murphy
2013-02-08 14:31 ` Adam Goryachev
2013-02-08 14:19 ` Adam Goryachev
2013-02-08 6:15 ` Adam Goryachev
2013-02-07 15:32 ` Dave Cundiff
2013-02-08 13:58 ` Adam Goryachev
2013-02-08 21:42 ` Stan Hoeppner
2013-02-14 22:42 ` Chris Murphy
2013-02-15 1:10 ` Adam Goryachev
2013-02-15 1:40 ` Chris Murphy
2013-02-15 4:01 ` Adam Goryachev
2013-02-15 5:14 ` Chris Murphy
2013-02-15 11:10 ` Adam Goryachev
2013-02-15 23:01 ` Chris Murphy
2013-02-17 9:52 ` RAID performance - new kernel results Adam Goryachev
2013-02-18 13:20 ` RAID performance - new kernel results - 5x SSD RAID5 Stan Hoeppner
2013-02-20 17:10 ` Adam Goryachev
2013-02-21 6:04 ` Stan Hoeppner
2013-02-21 6:40 ` Adam Goryachev
2013-02-21 8:47 ` Joseph Glanville
2013-02-22 8:10 ` Stan Hoeppner
2013-02-24 20:36 ` Stan Hoeppner
2013-03-01 16:06 ` Adam Goryachev
2013-03-02 9:15 ` Stan Hoeppner
2013-03-02 17:07 ` Phil Turmel
2013-03-02 23:48 ` Stan Hoeppner
2013-03-03 2:35 ` Phil Turmel
2013-03-03 15:19 ` Adam Goryachev
2013-03-04 1:31 ` Phil Turmel
2013-03-04 9:39 ` Adam Goryachev
2013-03-04 12:41 ` Phil Turmel
2013-03-04 12:42 ` Stan Hoeppner
2013-03-04 5:25 ` Stan Hoeppner
2013-03-03 17:32 ` Adam Goryachev
2013-03-04 12:20 ` Stan Hoeppner
2013-03-04 16:26 ` Adam Goryachev
2013-03-05 9:30 ` RAID performance - 5x SSD RAID5 - effects of stripe cache sizing Stan Hoeppner
2013-03-05 15:53 ` Adam Goryachev
2013-03-07 7:36 ` Stan Hoeppner
2013-03-08 0:17 ` Adam Goryachev
2013-03-08 4:02 ` Stan Hoeppner
2013-03-08 5:57 ` Mikael Abrahamsson
2013-03-08 10:09 ` Stan Hoeppner
2013-03-08 14:11 ` Mikael Abrahamsson
2013-02-21 17:41 ` RAID performance - new kernel results - 5x SSD RAID5 David Brown
2013-02-23 6:41 ` Stan Hoeppner
2013-02-23 15:57 ` RAID performance - new kernel results John Stoffel
2013-03-01 16:10 ` Adam Goryachev
2013-03-10 15:35 ` Charles Polisher
2013-04-15 12:23 ` Adam Goryachev
2013-04-15 15:31 ` John Stoffel
2013-04-17 10:15 ` Adam Goryachev
2013-04-15 16:49 ` Roy Sigurd Karlsbakk
2013-04-15 20:16 ` Phil Turmel
2013-04-16 19:28 ` Roy Sigurd Karlsbakk
2013-04-16 21:03 ` Phil Turmel
2013-04-16 21:43 ` Stan Hoeppner
2013-04-15 20:42 ` Stan Hoeppner
2013-02-08 3:32 ` RAID performance Stan Hoeppner
2013-02-08 7:11 ` Adam Goryachev
2013-02-08 17:10 ` Stan Hoeppner
2013-02-08 18:44 ` Adam Goryachev
2013-02-09 4:09 ` Stan Hoeppner
2013-02-10 4:40 ` Adam Goryachev
2013-02-10 13:22 ` Stan Hoeppner
2013-02-10 16:16 ` Adam Goryachev
2013-02-10 17:19 ` Mikael Abrahamsson
2013-02-10 21:57 ` Adam Goryachev
2013-02-11 3:41 ` Adam Goryachev
2013-02-11 4:33 ` Mikael Abrahamsson
2013-02-12 2:46 ` Stan Hoeppner
2013-02-12 5:33 ` Adam Goryachev
2013-02-13 7:56 ` Stan Hoeppner
2013-02-13 13:48 ` Phil Turmel
2013-02-13 16:17 ` Adam Goryachev
2013-02-13 20:20 ` Adam Goryachev
2013-02-14 12:22 ` Stan Hoeppner
2013-02-15 13:31 ` Stan Hoeppner
2013-02-15 14:32 ` Adam Goryachev
2013-02-16 1:07 ` Stan Hoeppner
2013-02-16 17:19 ` Adam Goryachev
2013-02-17 1:42 ` Stan Hoeppner
2013-02-17 5:02 ` Adam Goryachev
2013-02-17 6:28 ` Stan Hoeppner
2013-02-17 8:41 ` Adam Goryachev
2013-02-17 13:58 ` Stan Hoeppner
2013-02-17 14:46 ` Adam Goryachev
2013-02-19 8:17 ` Stan Hoeppner
2013-02-20 16:45 ` Adam Goryachev
2013-02-21 0:45 ` Stan Hoeppner
2013-02-21 3:10 ` Adam Goryachev
2013-02-22 11:19 ` Stan Hoeppner
2013-02-22 15:25 ` Charles Polisher
2013-02-23 4:14 ` Stan Hoeppner
2013-02-12 7:34 ` Mikael Abrahamsson
2013-02-08 7:17 ` Adam Goryachev
2013-02-07 12:01 ` Brad Campbell
2013-02-07 12:37 ` Adam Goryachev
2013-02-07 17:12 ` Fredrik Lindgren
2013-02-08 0:00 ` Adam Goryachev
2013-02-11 19:49 ` Roy Sigurd Karlsbakk
2013-02-11 20:30 ` Dave Cundiff
2013-02-07 11:32 ` Mikael Abrahamsson
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