From: Joe Landman <joe.landman@gmail.com>
To: xfs@oss.sgi.com
Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?)
Date: Tue, 10 Apr 2012 10:32:20 -0400 [thread overview]
Message-ID: <4F844474.3010005@gmail.com> (raw)
In-Reply-To: <CAAxjCEzRa7CpbA9iESEDjmWQMsJTjkWHJj69ADOXDa4CiRpx3w@mail.gmail.com>
On 04/10/2012 10:02 AM, Stefan Ring wrote:
>> And is XFS aligned to the RAID 6?
>>
>> What does xfs_info display on it?
>
> Yes, it’s aligned.
>
> meta-data=/dev/mapper/vg_data-lvhome isize=256 agcount=4,
> agsize=73233656 blks
> = sectsz=512 attr=2
> data = bsize=4096 blocks=292934624, imaxpct=5
> = sunit=8 swidth=32 blks
> naming =version 2 bsize=4096 ascii-ci=0
> log =internal bsize=4096 blocks=143040, version=2
> = sectsz=512 sunit=8 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
>
> I changed the stripe size to 32kb in the meantime. This way, it
> performs slightly better.
try 128k to 512k for stripe size. And try to increase your agcount by
(nearly) an order of magnitude.
--
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics Inc.
email: landman@scalableinformatics.com
web : http://scalableinformatics.com
http://scalableinformatics.com/sicluster
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next prev parent reply other threads:[~2012-04-10 14:32 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-05 18:10 XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?) Stefan Ring
2012-04-05 19:56 ` Peter Grandi
2012-04-05 22:41 ` Peter Grandi
2012-04-06 14:36 ` Peter Grandi
2012-04-06 15:37 ` Stefan Ring
2012-04-07 13:33 ` Peter Grandi
2012-04-05 21:37 ` Christoph Hellwig
2012-04-06 1:09 ` Peter Grandi
2012-04-06 8:25 ` Stefan Ring
2012-04-07 18:57 ` Martin Steigerwald
2012-04-10 14:02 ` Stefan Ring
2012-04-10 14:32 ` Joe Landman [this message]
2012-04-10 15:56 ` Stefan Ring
2012-04-10 18:13 ` Martin Steigerwald
2012-04-10 20:44 ` Stan Hoeppner
2012-04-10 21:00 ` Stefan Ring
2012-04-05 22:32 ` Roger Willcocks
2012-04-06 7:11 ` Stefan Ring
2012-04-06 8:24 ` Stefan Ring
2012-04-05 23:07 ` Peter Grandi
2012-04-06 0:13 ` Peter Grandi
2012-04-06 7:27 ` Stefan Ring
2012-04-06 23:28 ` Stan Hoeppner
2012-04-07 7:27 ` Stefan Ring
2012-04-07 8:53 ` Emmanuel Florac
2012-04-07 14:57 ` Stan Hoeppner
2012-04-09 11:02 ` Stefan Ring
2012-04-09 12:48 ` Emmanuel Florac
2012-04-09 12:53 ` Stefan Ring
2012-04-09 13:03 ` Emmanuel Florac
2012-04-09 23:38 ` Stan Hoeppner
2012-04-10 6:11 ` Stefan Ring
2012-04-10 20:29 ` Stan Hoeppner
2012-04-10 20:43 ` Stefan Ring
2012-04-10 21:29 ` Stan Hoeppner
2012-04-09 0:19 ` Dave Chinner
2012-04-09 11:39 ` Emmanuel Florac
2012-04-09 21:47 ` Dave Chinner
2012-04-07 8:49 ` Emmanuel Florac
2012-04-08 20:33 ` Stan Hoeppner
2012-04-08 21:45 ` Emmanuel Florac
2012-04-09 5:27 ` Stan Hoeppner
2012-04-09 12:45 ` Emmanuel Florac
2012-04-13 19:36 ` Stefan Ring
2012-04-14 7:32 ` Stan Hoeppner
2012-04-14 11:30 ` Stefan Ring
2012-04-09 14:21 ` Geoffrey Wehrman
2012-04-10 19:30 ` Stan Hoeppner
2012-04-11 22:19 ` Geoffrey Wehrman
2012-04-07 16:50 ` Peter Grandi
2012-04-07 17:10 ` Joe Landman
2012-04-08 21:42 ` Stan Hoeppner
2012-04-09 5:13 ` Stan Hoeppner
2012-04-09 11:52 ` Stefan Ring
2012-04-10 7:34 ` Stan Hoeppner
2012-04-10 13:59 ` Stefan Ring
2012-04-09 9:23 ` Stefan Ring
2012-04-09 23:06 ` Stan Hoeppner
2012-04-06 0:53 ` Peter Grandi
2012-04-06 7:32 ` Stefan Ring
2012-04-06 5:53 ` Stefan Ring
2012-04-06 15:35 ` Peter Grandi
2012-04-10 14:05 ` Stefan Ring
2012-04-07 19:11 ` Peter Grandi
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