Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756356AbYCaMwv (ORCPT ); Mon, 31 Mar 2008 08:52:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753819AbYCaMwo (ORCPT ); Mon, 31 Mar 2008 08:52:44 -0400 Received: from smtp.nokia.com ([192.100.105.134]:27893 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753462AbYCaMwn (ORCPT ); Mon, 31 Mar 2008 08:52:43 -0400 Message-ID: <47F0DD49.7010302@nokia.com> Date: Mon, 31 Mar 2008 15:47:05 +0300 From: Adrian Hunter User-Agent: Thunderbird 2.0.0.12 (X11/20080227) MIME-Version: 1.0 To: ext Jan Engelhardt CC: Artem Bityutskiy , LKML , joern@lazybastard.org Subject: Re: [RFC PATCH] UBIFS - new flash file system References: <1206629746-4298-1-git-send-email-Artem.Bityutskiy@nokia.com> In-Reply-To: Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 31 Mar 2008 12:52:23.0571 (UTC) FILETIME=[108FFE30:01C8932E] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1262 Lines: 35 Jan Engelhardt wrote: > > On Thursday 2008-03-27 15:55, Artem Bityutskiy wrote: >> >> here is a new flash file system developed by Nokia engineers with >> help of the University of Szeged. The new file-system is called >> UBIFS, which stands for UBI file system. UBI is the wear-leveling/ >> bad-block handling/volume management layer which is already in >> mainline (see drivers/mtd/ubi). >> [...] > > And how does it compare to logfs? We don't know a lot about logfs, so you will really have to make your own comparison. However our general impressions are as follows: 1. In our testing logfs file operations seem to be much slower, see http://osl.sed.hu/wiki/ubifs/index.php/IOzone 2. logfs code base is much smaller i.e. UBIFS has 3-4 times as many lines of code. 3. logfs does not seem to have bad-block handling. 4. logfs does not seem to have wear-leveling. 5. We are not certain how scalable logfs is. We could be wrong about those things - don't flame us if we are. Ask us about UBIFS, not logfs. -- 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/