From: Johann Lombardi Subject: Re: Ext4 benchmarks Date: Fri, 30 Mar 2007 10:43:09 +0200 Message-ID: <20070330084309.GA9249@lombardij> References: <45FFFBAA.6080404@bull.net> <4600A1BD.80700@us.ibm.com> <460A3010.6080201@bull.net> <460A79C2.6030406@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Jean-Pierre Dion , linux-ext4@vger.kernel.org To: "Jose R. Santos" Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:52688 "EHLO ecfrec.frec.bull.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933535AbXC3InP (ORCPT ); Fri, 30 Mar 2007 04:43:15 -0400 In-Reply-To: <460A79C2.6030406@us.ibm.com> Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org 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? Johann