From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id n9VGn9B8093616 for ; Sat, 31 Oct 2009 11:49:10 -0500 Received: from smtp5-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8234614CAC2F for ; Sat, 31 Oct 2009 09:49:18 -0700 (PDT) Received: from smtp5-g21.free.fr (smtp5-g21.free.fr [212.27.42.5]) by cuda.sgi.com with ESMTP id NLxw4Rn0gb9AUuU5 for ; Sat, 31 Oct 2009 09:49:18 -0700 (PDT) Date: Sat, 31 Oct 2009 17:48:36 +0100 From: Emmanuel Florac Subject: Re: XFS and DPX files Message-ID: <20091031174836.3fc9505b@galadriel.home> In-Reply-To: <4AEC4BAA.20606@aol.com> References: <4AEC2CF4.8040703@aol.com> <20091031151825.46210b6a@galadriel.home> <4AEC4BAA.20606@aol.com> Mime-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: "AndrewL733@aol.com" Cc: xfs@oss.sgi.com Le Sat, 31 Oct 2009 10:37:30 -0400 vous =E9criviez: > = > 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=3D65536,sw=3D15 /dev/sdXX -- = -------------------------------------------------- Emmanuel Florac www.intellique.com = -------------------------------------------------- _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs