From: Andreas Dilger Subject: Re: Initial results of FLEX_BG feature. Date: Wed, 11 Jul 2007 06:41:10 -0600 Message-ID: <20070711124110.GZ6417@schatzie.adilger.int> References: <20070710112307.34c2ba5c@rx8> <20070711041213.GH6417@schatzie.adilger.int> <20070711003004.531c9307@naruto> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "linux-ext4@vger.kernel.org" To: "Jose R. Santos" Return-path: Received: from 74-0-229-162.T1.lbdsl.net ([74.0.229.162]:42535 "EHLO mail.clusterfs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756028AbXGKMlM (ORCPT ); Wed, 11 Jul 2007 08:41:12 -0400 Content-Disposition: inline In-Reply-To: <20070711003004.531c9307@naruto> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Jul 11, 2007 00:30 -0500, Jose R. Santos wrote: > On Tue, 10 Jul 2007 22:12:14 -0600 > Andreas Dilger wrote: > > You might also want to test out placement of the journal in the middle > > of the filesystem, the U. Wisconsin folks tested this in one of their > > papers and showed some noticable improvements. That isn't exactly > > related, but it is a relatively simple tweak to mke2fs/tune2fs to give > > it an allocation goal of group_desc[s_groups_count / 2].bg_inode_table > > (to put it past inode table in middle group). > > Make sense. Do you have a link to the paper? I don't have a URL, but if you search for "IRON ext3" and go to Remzi's site it is called "Analysis and Evolution of Journaling File Systems". Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.