Hier, der erste ansatz fuer einen Online-ext2 Resizer - Im zusammenspiel mit dem LVM und ext3 (aka ext2 + journaling) haben wir die AIX jfs funktionalitaet .... ----- Forwarded message from Andreas Dilger <adilger@enel.ucalgary.ca> ----- Return-Path: <owner-linux-fsdevel-outgoing@vger.rutgers.edu> Delivered-To: flo@paradigm.rfc822.org Received: by paradigm.rfc822.org (Postfix, from userid 10) id 024D69052; Sun, 17 Oct 1999 11:55:51 +0200 (CEST) Received: from vger.rutgers.edu (vger.rutgers.edu [128.6.190.2]) by noose.gt.owl.de (Postfix) with ESMTP id C2E177F8 for <flo@rfc822.org>; Sun, 17 Oct 1999 06:34:17 +0200 (CEST) Received: by vger.rutgers.edu via listexpand id <S156962AbPJQEd2>; Sun, 17 Oct 1999 00:33:28 -0400 Received: by vger.rutgers.edu id <S156944AbPJQEdV>; Sun, 17 Oct 1999 00:33:21 -0400 Received: from 24.65.233.117.ab.wave.home.com ([24.65.233.117]:5220 "EHLO webber.adilger.net") by vger.rutgers.edu with ESMTP id <S156962AbPJQEdO>; Sun, 17 Oct 1999 00:33:14 -0400 Received: (from adilger@localhost) by webber.adilger.net (8.7.5/8.6.9) id WAA26043; Sat, 16 Oct 1999 22:19:23 -0600 From: Andreas Dilger <adilger@enel.ucalgary.ca> Message-Id: <199910170419.WAA26043@webber.adilger.net> Subject: ext2 online resizer available To: linux-fsdevel@vger.rutgers.edu (Linux FS development list), linux-lvm@msede.com (Linux LVM mailing list), linux-kernel@vger.rutgers.edu (Linux kernel development list) Date: Sat, 16 Oct 1999 22:19:23 -0600 (MDT) X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-fsdevel@vger.rutgers.edu Precedence: bulk X-Loop: majordomo@vger.rutgers.edu X-Orcpt: rfc822;linux-fsdevel-outgoing Status: RO Content-Length: 1745 Lines: 36 Hello all, my online ext2 resizer is now available in a fully functional state. If the underlying partition supports it, it is possible to resize an ext2 filesystem while it is mounted and in use by applications. This capability is provided by a kernel patch (2.2/2.3 and 2.0 versions available - should apply cleanly to most versions as that part of the kernel code hasn't changed much in a long time) and some user-space tools. The amount that you can resize a filesystem depends on the block size and whether or not you have "prepared" the filesystem for large resizes. The ext2 filesystem is maintained as a normal filesystem at all times, and it can be used by a non-patched kernel at any time, and with one exception (if you have an old e2fsck) will fsck clean after a resize. Note that you need some way to resize the underlying partition (via LVM probably) in order to resize the filesystem. For testing purposes you can also create a small filesystem on a large partition, and then resize to fill the partition. Patches are available at my web site: http://www-mddsp.enel.ucalgary.ca/People/adilger/online-ext2/ The user-space tools are now part of Lennert Buytenhek's ext2resize suite: http://www.dsv.nl/~buytenh/ext2resize/ for which a patch is required from my site. Please give it a good testing, as I haven't been able to find any problems while putting a hundred copies of an 11MB filesystem tree into a filesystem while doing thousands of resizes to the same mounted filesystem. Cheers, Andreas -- Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry?" http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert ----- End forwarded message ----- -- Florian Lohoff flo@rfc822.org +49-5241-470566 ... The failure can be random; however, when it does occur, it is catastrophic and is repeatable ... Cisco Field Notice