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 o9IKFTw8014451 for ; Mon, 18 Oct 2010 15:15:29 -0500 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 186C819378F4 for ; Mon, 18 Oct 2010 13:16:41 -0700 (PDT) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id 6NwGWEew1qbbINq8 for ; Mon, 18 Oct 2010 13:16:41 -0700 (PDT) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id BF8F86C0D8 for ; Mon, 18 Oct 2010 15:16:40 -0500 (CDT) Message-ID: <4CBCAB28.90708@hardwarefreak.com> Date: Mon, 18 Oct 2010 15:16:40 -0500 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: cannot defrag volume, fragmentation factor 21.73% References: <4CBC3910.70806@cape-horn-eng.com> In-Reply-To: <4CBC3910.70806@cape-horn-eng.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: xfs@oss.sgi.com Richard Ems put forth on 10/18/2010 7:09 AM: > I ran several times xfs_fsr, but the 21.73% factor stays there. > There where some busy or modified files on which I started xfs_fsr later > again, but this ones where small files and the 21.73% is still there. > > Any ideas? Yes. The answer is in a thread in last month's archive: http://oss.sgi.com/pipermail/xfs/2010-September/047003.html Dave Chinner put forth on 9/11/2010 3:23 AM: > xfs_db used buffered IO on the block device, which is not coherent > with the filesystem. If you are using it on an active filesystem, > then running "echo 1 > /proc/sys/vm/drop_caches" before you run > xfs_db should make it read from disk at least once.... -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs