Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 26 Jul 2001 09:23:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 26 Jul 2001 09:23:25 -0400 Received: from perninha.conectiva.com.br ([200.250.58.156]:26386 "HELO perninha.conectiva.com.br") by vger.kernel.org with SMTP id ; Thu, 26 Jul 2001 09:23:15 -0400 Date: Thu, 26 Jul 2001 10:23:07 -0300 (BRST) From: Rik van Riel X-X-Sender: To: Matthias Andree Cc: Andrew Morton , lkml , "ext3-users@redhat.com" Subject: Re: ext3-2.4-0.9.4 In-Reply-To: <20010726151749.M17244@emma1.emma.line.org> 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 Original-Recipient: rfc822;linux-kernel-outgoing On Thu, 26 Jul 2001, Matthias Andree wrote: > On Thu, 26 Jul 2001, Rik van Riel wrote: > > > In fact, knowing how hard disks work mechanically, only > > journaling filesystems could have an extention to make > > this work. Ie. this is NOT something you can rely on ;) > > This is not about failing hard disks. It is about premature > acknowledgment of something which has not happened at that time. So you didn't read what I was writing. Let me explain it to you slowly: Disks. Write. One. Write. At. A. Time. A rename often needs as many as 4 or 5 writes, ergo, you CANNOT do a rename atomically without journaling and transactions. > The competition is there and it has names: BSD + ufs + softupdates, > Solaris + logging ufs. Read MTA mailing lists before obstructing. BSD + softupdates is physically incapable of doing what you suggest it does. This can be proven from the lack of transactions and the way hard disks work physically. regards, Rik -- Executive summary of a recent Microsoft press release: "we are concerned about the GNU General Public License (GPL)" http://www.surriel.com/ http://www.conectiva.com/ http://distro.conectiva.com/ - 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/