From: Andreas Dilger Subject: Re: Ext4 benchmarks Date: Fri, 30 Mar 2007 12:50:20 -0600 Message-ID: <20070330185019.GW5967@schatzie.adilger.int> References: <45FFFBAA.6080404@bull.net> <4600A1BD.80700@us.ibm.com> <460A3010.6080201@bull.net> <460A79C2.6030406@us.ibm.com> <20070330084309.GA9249@lombardij> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Jose R. Santos" , Jean-Pierre Dion , linux-ext4@vger.kernel.org To: Johann Lombardi Return-path: Received: from mail.clusterfs.com ([206.168.112.78]:44518 "EHLO mail.clusterfs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751791AbXC3SuY (ORCPT ); Fri, 30 Mar 2007 14:50:24 -0400 Content-Disposition: inline In-Reply-To: <20070330084309.GA9249@lombardij> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Mar 30, 2007 10:43 +0200, Johann Lombardi wrote: > On Wed, Mar 28, 2007 at 09:20:50AM -0500, Jose R. Santos wrote: > > While it may be to late for the purposes of your OLS paper, one thing > > that doesn't seem to be getting much attention is the performance of a > > file system while doing many meta-data operations or throughput testing > > during heavy journal log activity. > > Back in 2005, Alex sent a patch to monitor journal activity through procfs: > http://marc.info/?l=linux-ext4&m=113538565128617&w=2 > > We have been using this patch for more than 1 year and it is very useful > for investigating performance issues. > Does anybody know why this patch hasn't found its way into the mainline? > Maybe it could be merged in jbd2? Yes, we use this functionality failry often, so having it in jbd2 would be quite useful. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.