From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753486AbYE2Gh5 (ORCPT ); Thu, 29 May 2008 02:37:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751349AbYE2Ghq (ORCPT ); Thu, 29 May 2008 02:37:46 -0400 Received: from drutsystem.com ([80.72.38.138]:3513 "EHLO drutsystem.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751310AbYE2Ghp (ORCPT ); Thu, 29 May 2008 02:37:45 -0400 Message-ID: <483E4F36.8050902@ziu.info> Date: Thu, 29 May 2008 08:37:42 +0200 From: Michal Soltys User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: linux-raid@vger.kernel.org Cc: Bill Davidsen , linux-kernel@vger.kernel.org, xfs@oss.sgi.com Subject: Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++) References: <483DE612.5000804@tmr.com> In-Reply-To: <483DE612.5000804@tmr.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AV-Checked: ClamAV on drutsystem.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > A very nice bit of work, my only questions is if you ever feel motivated > to repeat this test, it would be fun to do it with ext3 (or ext4) using > the stride= parameter. I did limited testing and it really seemed to > help, but nothing remotely as format as your test. > Speaking about which, it would probably be good to adjust a little how the filesystem is created and mounted (both in xfs and ext3/4 cases). E.g. lazy-count=1 is still not the default last time I checked mkfs.xfs. And even ext4.txt from kernel documentation recommends mounting it with data=writeback,nobh when doing comparison with metadata journaling filesystems (the same would go for ext3). Along with different journal sizes, keeping an eye on stripe & stripe-width, and other settings that might be of interest.