From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id C9F2E7F3F for ; Mon, 10 Mar 2014 23:56:44 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay1.corp.sgi.com (Postfix) with ESMTP id B22468F8037 for ; Mon, 10 Mar 2014 21:56:41 -0700 (PDT) Received: from bash.esri.com (Redlands.esri.com [198.102.62.250]) by cuda.sgi.com with ESMTP id G7xIhM5GEKFbjE42 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Mon, 10 Mar 2014 21:56:40 -0700 (PDT) Received: from bash.esri.com (localhost [127.0.0.1]) by bash.esri.com (8.14.4/8.14.4) with ESMTP id s2B4udHC018269 for ; Mon, 10 Mar 2014 21:56:39 -0700 Received: (from ray5147@localhost) by bash.esri.com (8.14.4/8.14.4/Submit) id s2B4udd5018267 for xfs@oss.sgi.com; Mon, 10 Mar 2014 21:56:39 -0700 Date: Mon, 10 Mar 2014 21:56:39 -0700 From: Ray Van Dolson Subject: sw and su for hardware RAID10 (w/ LVM) Message-ID: <20140311045639.GA18159@esri.com> MIME-Version: 1.0 Content-Disposition: inline List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com RHEL6.x + XFS that comes w/ Red Hat's scalable file system add on. We have two PowerVault MD3260e's each configured with a 30 disk RAID10 (15 RAID groups) exposed to our server. Segment size is 128K (in Dell's world I'm not sure if this means my stripe width is 128K*15?) Have set up a concatenated LVM volume on top of these two "virtual disks" (with lvcreate -i 2). By default LVM says it's used a stripe width of 64K. # lvs -o path,size,stripes,stripe_size Path LSize #Str Stripe /dev/agsfac_vg00/lv00 100.00t 2 64.00k Unsure if these defaults should be adjusted. I'm trying to figure out the appropriate sw/su values to use per: http://xfs.org/index.php/XFS_FAQ#Q:_How_to_calculate_the_correct_sunit.2Cswidth_values_for_optimal_performance Am considering either just going with defaults (XFS should pull from LVM I think) or doing something like sw=2,su=128K. However, maybe I should be doing sw=2,su=1920K? And perhaps my LVM stripe width should be adjusted? Thanks, Ray _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs