From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754339AbXDPDA4 (ORCPT ); Sun, 15 Apr 2007 23:00:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754347AbXDPDAz (ORCPT ); Sun, 15 Apr 2007 23:00:55 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:36236 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754336AbXDPDAz (ORCPT ); Sun, 15 Apr 2007 23:00:55 -0400 Date: Mon, 16 Apr 2007 13:00:35 +1000 From: David Chinner To: Krzysztof Halasa Cc: Neil Brown , "David R. Litwin" , linux-kernel@vger.kernel.org Subject: Re: ZFS with Linux: An Open Plea Message-ID: <20070416030035.GX32602149@melbourne.sgi.com> References: <17952.5537.364603.419364@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Apr 14, 2007 at 08:56:40PM +0200, Krzysztof Halasa wrote: > Neil Brown writes: > > > What, specifically, is there in ZFS that you want to use in Linux? > > There is lots of interesting stuff in there, but which bit has caught > > your attention? It is possible that that functionality can be > > incorporated into Linux without trying to clone or copy ZFS. > > Filesystem block hashes (checksums) and in-fs redundancy (using the > hashes to determine which copy of data is correct in case of > corruption). It would mean multi-device filesystem. Yup - multidevice support in XFS is something I'm working on at the moment. There's many nice features that multi-device filesystems can take advantage of (different geomteries, multiple journals, internal RAID, redundancy, partially online/offline filesystems, partial filesystem repair, etc). Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group