Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992923AbXBQSIX (ORCPT ); Sat, 17 Feb 2007 13:08:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992985AbXBQSIX (ORCPT ); Sat, 17 Feb 2007 13:08:23 -0500 Received: from mail.tmr.com ([64.65.253.246]:45982 "EHLO gaimboi.tmr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992923AbXBQSIW convert rfc822-to-8bit (ORCPT ); Sat, 17 Feb 2007 13:08:22 -0500 Message-ID: <45D7450F.6090309@tmr.com> Date: Sat, 17 Feb 2007 13:10:23 -0500 From: Bill Davidsen Organization: TMR Associates Inc, Schenectady NY User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061105 SeaMonkey/1.0.6 MIME-Version: 1.0 To: =?UTF-8?B?SsO2cm4gRW5nZWw=?= CC: Juan Piernas Canovas , Jan Engelhardt , sfaibish , kernel list Subject: Re: [ANNOUNCE] DualFS: File System with Meta-data and Data Separation References: <20070215200922.GB24643@lazybastard.org> <20070216091321.GA28092@lazybastard.org> <45D642A4.5010009@tmr.com> <20070217151108.GA301@lazybastard.org> In-Reply-To: <20070217151108.GA301@lazybastard.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1182 Lines: 29 Jörn Engel wrote: > On Fri, 16 February 2007 18:47:48 -0500, Bill Davidsen wrote: > >> Actually I am interested in the common case, where the machine is not >> out of space, or memory, or CPU, but when it is appropriately sized to >> the workload. Not that I lack interest in corner cases, but the "running >> flat out" case doesn't reflect case where there's enough hardware, now >> the o/s needs to use it well. >> > > There is one detail about this specific corner case you may be missing. > Most log-structured filesystems don't just drop in performance - they > can run into a deadlock and the only recovery from this is the lovely > backup-mkfs-restore procedure. > I missed that. Which corner case did you find triggers this in DualFS? > If it was just performance, I would agree with you. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - 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/