From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q1I2Ht0i126959 for ; Fri, 17 Feb 2012 20:17:55 -0600 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id AJLrFdVQMNvmOC7C for ; Fri, 17 Feb 2012 18:17:53 -0800 (PST) Message-ID: <4F3F0A4A.7050708@redhat.com> Date: Fri, 17 Feb 2012 18:17:46 -0800 From: Eric Sandeen MIME-Version: 1.0 Subject: Re: XFS memory recomendation? References: <2BF070A7A2375D46BA1B6087F8D5DCB68BEA721CA3@seldmbx01.corpusers.net> <20120217024941.GH14132@dastard> <4F3F05D4.1020705@hardwarefreak.com> In-Reply-To: <4F3F05D4.1020705@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@hardwarefreak.com Cc: "Assarsson, Emil" , "xfs@oss.sgi.com" On 2/17/12 5:58 PM, Stan Hoeppner wrote: > On 2/16/2012 8:49 PM, Dave Chinner wrote: >> On Thu, Feb 16, 2012 at 12:50:57PM +0100, Assarsson, Emil wrote: >>> Hi, >>> >>> Are there any recommendations about how much memory I need based >>> on the size of the file system and/or amount of files? For >>> example: how much memory would be optimal for a 20TB file system >>> with 3000000 files? >> >> /me shrugs >> >>> I guess it depends on the usage pattern? >> >> Totally. > > Allow me to drag the OP's question under a different light... > > I have a 20TB XFS filesystem with 3000000 files. What is the minimum > amount of system RAM I will need to run an xfs_check or xfs_repair or > xfs_[tool] on this filesystem, assuming Linux has been put into a low > overhead state, and said tool[s] has access to the bulk of the system > memory? > > Is there a formula available so any XFS user can calculate this > xfs_[tools] RAM requirement, given FS size X and file count Y? > http://xfs.org/index.php/XFS_FAQ#Q:_Which_factors_influence_the_memory_usage_of_xfs_repair.3F -Eric _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs