From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262080AbUJ1Sws (ORCPT ); Thu, 28 Oct 2004 14:52:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261755AbUJ1StS (ORCPT ); Thu, 28 Oct 2004 14:49:18 -0400 Received: from web12822.mail.yahoo.com ([216.136.174.203]:23208 "HELO web12822.mail.yahoo.com") by vger.kernel.org with SMTP id S262123AbUJ1SoQ (ORCPT ); Thu, 28 Oct 2004 14:44:16 -0400 Message-ID: <20041028184406.55475.qmail@web12822.mail.yahoo.com> Date: Thu, 28 Oct 2004 11:44:06 -0700 (PDT) From: Shantanu Goel Subject: Re: ext3 multiple thread streaming write performance with 2.6.9 To: Arjan van de Ven Cc: Kernel In-Reply-To: <1098950444.2642.6.camel@laptop.fenrus.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Thanks for the pointer Arjan. That worked out well. Here are the numbers I got for 2.6.9 with reservation patches applied from 2.6.9-mm1. ext3:data=ordered,reservation: 1: 47 48 48 (47) ext3:data=ordered,reservation: 2: 47 44 45 (46) ext3:data=ordered,reservation: 4: 45 43 45 (44) ext3:data=writeback,reservation: 1: 47 49 48 (48) ext3:data=writeback,reservation: 2: 48 46 44 (46) ext3:data=writeback,reservation: 4: 46 45 45 (45) ext2: 1: 53 55 54 (54) ext2: 2: 42 52 51 (48) ext2: 4: 21 26 25 (24) xfs: 1: 53 53 53 (53) xfs: 2: 48 53 51 (51) xfs: 4: 43 47 46 (45) --- Arjan van de Ven wrote: > On Wed, 2004-10-27 at 21:04 -0700, Shantanu Goel > wrote: > > Hi, > > > > I am seeing extremely variable and poor > performance > > with ext3 in the presence of multiple streaming > > writers. Below are the results of some tests I > have > > conducted with iozone. XFS appears to be most > > consistent performer for this workload, followed > by > > ext2 and finally ext3. Has this been observed > > elsewhere? If so, is it possible to tune ext3 to > > perform better on this workload? > > yes you should use the reservations patch from the > -mm tree; > see http://people.redhat.com/arjanv/reservations.png > for a graph of the difference > > __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail