From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262817AbUJ1IBj (ORCPT ); Thu, 28 Oct 2004 04:01:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262818AbUJ1IBj (ORCPT ); Thu, 28 Oct 2004 04:01:39 -0400 Received: from canuck.infradead.org ([205.233.218.70]:10762 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S262817AbUJ1IAv (ORCPT ); Thu, 28 Oct 2004 04:00:51 -0400 Subject: Re: ext3 multiple thread streaming write performance with 2.6.9 From: Arjan van de Ven To: Shantanu Goel Cc: Kernel In-Reply-To: <20041028040421.80505.qmail@web12826.mail.yahoo.com> References: <20041028040421.80505.qmail@web12826.mail.yahoo.com> Content-Type: text/plain Message-Id: <1098950444.2642.6.camel@laptop.fenrus.org> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2.dwmw2.1) Date: Thu, 28 Oct 2004 10:00:45 +0200 Content-Transfer-Encoding: 7bit X-Spam-Score: 2.6 (++) X-Spam-Report: SpamAssassin version 2.63 on canuck.infradead.org summary: Content analysis details: (2.6 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [62.195.31.207 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [62.195.31.207 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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