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 o9QC80JI070571 for ; Tue, 26 Oct 2010 07:08:00 -0500 Received: from server655-han.de-nserver.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9F15315FAC3A for ; Tue, 26 Oct 2010 05:24:49 -0700 (PDT) Received: from server655-han.de-nserver.de (server655-han.de-nserver.de [85.158.177.45]) by cuda.sgi.com with ESMTP id 4lTPHthCYmgqqZhU for ; Tue, 26 Oct 2010 05:24:49 -0700 (PDT) Message-ID: <4CC6C4E8.6010409@profihost.ag> Date: Tue, 26 Oct 2010 14:09:12 +0200 From: Stefan Priebe - Profihost AG MIME-Version: 1.0 Subject: Re: Pid: 8345, comm: rsync Not tainted 2.6.32.22intel #1 References: <4CC67450.9020602@profihost.ag> <20101026092205.086c0d89@galadriel.home> <4CC68249.7050409@profihost.ag> <20101026094111.48670eb7@galadriel.home> <4CC688FE.7010206@profihost.ag> <20101026130103.7cc43aec@harpe.intellique.com> <4CC6B56B.7020007@profihost.ag> <20101026132505.6af29d5d@harpe.intellique.com> In-Reply-To: <20101026132505.6af29d5d@harpe.intellique.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Emmanuel Florac Cc: xfs@oss.sgi.com Hi, thanks for your suggestions. > My other advices : generally don't use cfq scheduler with a RAID > controller, it will defeat the whole purpose of RAID cache and command > reordering abilities. Use noop, generally, and deepen the queue : > > echo "noop"> /sys/block/sdc/queue/scheduler > echo 512> /sys/block/sdc/queue/nr_requests Is there a way to make this static to this disk? > Don't hesitate to enlarge tremendously the read-ahead cache, too. I > generally use about 512 to 1024 sectors per drive as a rule of the > thumb, so a 4 drives array will use 2048 to 4096 : > > blockdev --setra 4096 /dev/sdc Is there also a way to make this static? > You should see a 100% write/read speed improvement with these > parameters. That would be great. Thanks Stefan Am 26.10.2010 13:25, schrieb Emmanuel Florac: > Le Tue, 26 Oct 2010 13:03:07 +0200 > Stefan Priebe - Profihost AG =E9crivait: > >> it is a 9650SE-8LPML with Firmware: FE9X 3.06.00.003. > > Augh, this firmware is antique :) The latest is 4.10.xx.xx. Anyway, > don't use firmware before 3.08.xx.xx, there were some nasty bugs. > >> So you mean i should upgrade to 4.x Firmware? > > Definitely. It will much improve performances, too. Simply download the > firmware file, extract it, and flash the controller with tw_cli : > > tw_cli /cXX update fw=3Dprom0006.img > > (the firmware is always in the prom00xx.img file). > >> Do i then have to do a >> filesystem repair? Or just wait if the error accours again? > > No, the filesystem will be fine. However you should start a RAID scrub > with > > tw_cli /cXX/uXX start verify > > This will rebuild the parity with the new 4.X format (faster writes) > and help detect any hardware fault. > > My other advices : generally don't use cfq scheduler with a RAID > controller, it will defeat the whole purpose of RAID cache and command > reordering abilities. Use noop, generally, and deepen the queue : > > echo "noop"> /sys/block/sdc/queue/scheduler > echo 512> /sys/block/sdc/queue/nr_requests > > Don't hesitate to enlarge tremendously the read-ahead cache, too. I > generally use about 512 to 1024 sectors per drive as a rule of the > thumb, so a 4 drives array will use 2048 to 4096 : > > blockdev --setra 4096 /dev/sdc > > You should see a 100% write/read speed improvement with these > parameters. > _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs