From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q39ELcLw143908 for ; Mon, 9 Apr 2012 09:21:38 -0500 Date: Mon, 9 Apr 2012 09:21:34 -0500 From: Geoffrey Wehrman Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?) Message-ID: <20120409142134.GC21431@sgi.com> References: <20350.9643.379841.771496@tree.ty.sabi.co.UK> <20350.13616.901974.523140@tree.ty.sabi.co.UK> <4F7F7C25.8040605@hardwarefreak.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F7F7C25.8040605@hardwarefreak.com> 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 Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Stan Hoeppner Cc: Stefan Ring , Linux fs XFS On Fri, Apr 06, 2012 at 06:28:37PM -0500, Stan Hoeppner wrote: | So while the XFS AG architecture may not be perfectly suited to your | single 6 drive RAID6 array, it still gives rather remarkable performance | given that the same architecture can scale pretty linearly to the | heights above, and far beyond. Something EXTx and others could never | dream of. Some of the SGI guys might be able to confirm deployed single | XFS filesystems spanning 1000+ drives in the past. Today we'd probably | only see that scale with CXFS. With an SGI IS16000 array which supports up to 1,200 drives, filesystems with large numbers of drives isn't difficult. Most configurations using the IS16000 have 8+2 RAID6 luns. I've seen sustained 15 GB/s to a single filesystem on one of the arrays with a 600 drive configuration. The scalability of XFS is impressive. -- Geoffrey Wehrman SGI Building 10 Office: (651)683-5496 2750 Blue Water Road Fax: (651)683-5098 Eagan, MN 55121 E-mail: gwehrman@sgi.com http://www.sgi.com/products/storage/software/ _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs