From: Eric Sandeen Subject: Re: Initial results of FLEX_BG feature. Date: Wed, 11 Jul 2007 00:39:46 -0500 Message-ID: <46946D22.3060409@redhat.com> References: <20070710112307.34c2ba5c@rx8> <20070711041213.GH6417@schatzie.adilger.int> <20070711003004.531c9307@naruto> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Andreas Dilger , "linux-ext4@vger.kernel.org" To: "Jose R. Santos" Return-path: Received: from mx1.redhat.com ([66.187.233.31]:38744 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752110AbXGKFkC (ORCPT ); Wed, 11 Jul 2007 01:40:02 -0400 In-Reply-To: <20070711003004.531c9307@naruto> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org 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? filesystem shrinking would need to be fixed to handle this too, right... -Eric