From: "Aneesh Kumar" Subject: Re: Ext4 devel interlock meeting minutes (March 7, 2007) Date: Sun, 11 Mar 2007 14:25:41 +0530 Message-ID: References: <45F05099.5020506@linux.vnet.ibm.com> <20070308230326.GI5823@schatzie.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Avantika Mathur" , linux-ext4@vger.kernel.org To: "Andreas Dilger" Return-path: Received: from ug-out-1314.google.com ([66.249.92.174]:7726 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751823AbXCKIzp (ORCPT ); Sun, 11 Mar 2007 04:55:45 -0400 Received: by ug-out-1314.google.com with SMTP id 44so1852614uga for ; Sun, 11 Mar 2007 00:55:41 -0800 (PST) In-Reply-To: <20070308230326.GI5823@schatzie.adilger.int> Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On 3/9/07, Andreas Dilger wrote: > On Mar 08, 2007 10:06 -0800, Avantika Mathur wrote: > > > > > - Aneesh Veetil has been working on a migration tool from block based to > > extents allocation. He is looking at two options. > > > > - Offline Migration: Modify e2fsprogs code to actually be able to create > > extents. This involves a lot of duplication of ext4 code (btree). > > e2fsprogs has code for interpreting extents, but code for creating them > > would have to be duplicated. > > > > - Online Migration: Use existing filesystem code to convert to extents - > > similar to online defragmentation. > > I would prefer to implement this using the same code as the online defrag. > To be useful, the online defrag has to work with block-mapped files anyways. Is there a tree (git or hg ) which i can use to get a working online defrag ? -aneesh