Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262661AbTHaU27 (ORCPT ); Sun, 31 Aug 2003 16:28:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262663AbTHaU26 (ORCPT ); Sun, 31 Aug 2003 16:28:58 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:13115 "EHLO ebiederm.dsl.xmission.com") by vger.kernel.org with ESMTP id S262661AbTHaU25 (ORCPT ); Sun, 31 Aug 2003 16:28:57 -0400 To: Mike Fedyk Cc: Ed Sweetman , Alex Tomas , linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net Subject: Re: [Ext2-devel] Re: [RFC] extents support for EXT3 References: <3F4F76A5.6020000@wmich.edu> <3F4F7D56.9040107@wmich.edu> <3F4F923F.9070207@wmich.edu> <3F4FAFA2.4080202@wmich.edu> <20030829213940.GC3846@matchmail.com> <3F4FD2BE.1020505@wmich.edu> <20030829231726.GE3846@matchmail.com> From: ebiederm@xmission.com (Eric W. Biederman) In-Reply-To: <20030829231726.GE3846@matchmail.com> User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 Date: 31 Aug 2003 14:25:49 -0600 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1085 Lines: 21 Mike Fedyk writes: > On Fri, Aug 29, 2003 at 06:25:02PM -0400, Ed Sweetman wrote: > > you get no real slowdown as far as rough benchmarks are concerned, > > perhaps with a microbenchmark you would see one and also, doesn't it > > take up more space to save the extent info and such? Either way, all of > > it's real benefits occur on large files. > > IIRC, if your blocks are contiguous, you can save as soon as soon as the > file size goes above one block (witout extents, the first 12 blocks are > pointed to by what? I forget... :-/ ) They are pointed to directly from the inode. In light of other concerns how reasonable is a switch to e2fsck that will remove extents so people can downgrade filesystems? Also given the incompatibility on the file format any chance of this being developed as ext4? Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/