From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753007AbYE1TGK (ORCPT ); Wed, 28 May 2008 15:06:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754123AbYE1TFr (ORCPT ); Wed, 28 May 2008 15:05:47 -0400 Received: from lucidpixels.com ([75.144.35.66]:51660 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753525AbYE1TFq (ORCPT ); Wed, 28 May 2008 15:05:46 -0400 Date: Wed, 28 May 2008 15:05:46 -0400 (EDT) From: Justin Piszcz To: =?ISO-8859-15?Q?Keld_J=F8rn_Simonsen?= cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, xfs@oss.sgi.com Subject: Re: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++) In-Reply-To: <20080528190242.GA5171@rap.rap.dk> Message-ID: References: <20080528190242.GA5171@rap.rap.dk> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1463747160-443333512-1212001546=:29755" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463747160-443333512-1212001546=:29755 Content-Type: TEXT/PLAIN; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Wed, 28 May 2008, Keld J=F8rn Simonsen wrote: > I added this in the wiki performance section. Ok. > I think it would have been informative if also a test with one drive in > a non-raid setup was described. Since the performance of bonnie++ deals with single threads/a raid1 would p= robably closely match it but yeah I could do that sometime. > > Are there any particular findings you want to highlight? Not in particular, just I could never find this information provided anywhe= re that showed all of the raid variation/types in one location that was easy t= o read. > > Is there some way to estimate random read and writes from this test? The sequential input and output and re-write speeds are the most important. > > Are the XFS file systems completely new when running the tests? Yes, after the creation of each array, mkfs.xfs -f /dev/md3 was run to ensu= re a clean mount and cron was also off throughout all testing. > > Best regards > keld ---1463747160-443333512-1212001546=:29755--