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 p3QM8VxT184731 for ; Tue, 26 Apr 2011 17:08:31 -0500 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 54A89153D66F for ; Tue, 26 Apr 2011 15:12:02 -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 cBDEtylKWO6pSnnt for ; Tue, 26 Apr 2011 15:12:02 -0700 (PDT) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 196A36C032 for ; Tue, 26 Apr 2011 17:12:02 -0500 (CDT) Message-ID: <4DB74331.3030804@hardwarefreak.com> Date: Tue, 26 Apr 2011 17:12:01 -0500 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: xfs performance problem References: <4DB72084.8020205@inf.ethz.ch> In-Reply-To: <4DB72084.8020205@inf.ethz.ch> 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 Benjamin Schindler put forth on 4/26/2011 2:44 PM: > Hi > > Since upgrading to newer kernels I have serious problems with xfs > performance on my root fs. > It runs on a software raid 0 with 2 disks. On the same two disks, there > are two more partitions running a software raid-1 with ext3. On the ext3 > system, I have no issue, so I assume the drives are fine. > But on the xfs filesystem, extracting a linux kernel archive takes 5 > minutes or more, running ldconfig similarily long. The harddrives are > sata-2. > I'm running gentoo linux with kernel 2.6.38-gentoo-r1. I'm attaching the > kernel config but I guess more info is needed - just let me know what is > needed. The kernel config isn't the problem. You haven't enabled the delayed logging feature. Add 'delaylog' to your fstab mount options for XFS devices, remount (or reboot if necessary) and it should decrease the run time of kernel tar extractions between 10x and 100x. Also, slap yourself in the forehead at least 3 times for running your root filesystem on RAID 0. That's akin to riding a motorcycle, naked, in a blizzard, down a steep, winding, ice covered mountain road with no guard rails and a 3000 ft drop. ;) -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs