From: Emmanuel Florac <eflorac@intellique.com>
To: "AndrewL733@aol.com" <AndrewL733@aol.com>
Cc: xfs@oss.sgi.com
Subject: Re: XFS and DPX files
Date: Sat, 31 Oct 2009 17:48:36 +0100 [thread overview]
Message-ID: <20091031174836.3fc9505b@galadriel.home> (raw)
In-Reply-To: <4AEC4BAA.20606@aol.com>
Le Sat, 31 Oct 2009 10:37:30 -0400 vous écriviez:
>
> Thanks. Already doing that -- 3ware controller does not support
> barriers, so that's automatically ruled out (you see a message in the
> syslog when mounting the filesystem that barriers will not be used).
> Already mounting with "noatime". Also have been trying "filestreams".
3Ware controller definitely supports barriers... What model are you
using BTW? On the 9650, the latest firmware gave me a solid 15-20%
performance boost! Did you apply the recommended optimizations like
these :
echo 512 > /sys/block/sdXX/queue/nr_requests
blockdev --setra 65536 /dev/sdXX
for the read-ahead, usual values depends heavily on the disks make and
number, usually ranging from 4096 to 65536.
Another trick is to mkfs the drive with su and sw matching the
underlying RAID, for instance for a 15 drives RAID6 with 64K stripe use
something like (beware, unverified syntax from memory):
mkfs -t xfs -d su=65536,sw=15 /dev/sdXX
--
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Emmanuel Florac www.intellique.com
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next prev parent reply other threads:[~2009-10-31 16:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-31 12:26 XFS and DPX files AndrewL733
2009-10-31 14:18 ` Emmanuel Florac
2009-10-31 14:37 ` AndrewL733
2009-10-31 16:48 ` Emmanuel Florac [this message]
2009-11-02 11:05 ` Michael Monnerie
2009-11-02 17:52 ` Emmanuel Florac
2009-11-02 21:50 ` AndrewL733
2009-11-02 22:26 ` Emmanuel Florac
2009-11-03 3:09 ` Eric Sandeen
2009-11-02 21:58 ` Michael Monnerie
2009-11-03 11:19 ` Emmanuel Florac
2009-11-03 20:58 ` Michael Monnerie
2009-12-14 16:17 ` Martin Spott
2009-12-14 17:49 ` Michael Weissenbacher
2009-11-02 21:34 ` Eric Sandeen
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