From owner-freebsd-fs@FreeBSD.ORG Tue Feb 13 20:07:37 2007 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DAD6416A47E for ; Tue, 13 Feb 2007 20:07:37 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from mh1.centtech.com (moat3.centtech.com [64.129.166.50]) by mx1.freebsd.org (Postfix) with ESMTP id B3E7713C4B3 for ; Tue, 13 Feb 2007 20:07:37 +0000 (UTC) (envelope-from anderson@freebsd.org) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.8/8.13.8) with ESMTP id l1DK7Udr042858; Tue, 13 Feb 2007 14:07:30 -0600 (CST) (envelope-from anderson@freebsd.org) Message-ID: <45D21A82.7000900@freebsd.org> Date: Tue, 13 Feb 2007 14:07:30 -0600 From: Eric Anderson User-Agent: Thunderbird 1.5.0.9 (X11/20070204) MIME-Version: 1.0 To: Julian Elischer References: <45CD6FF5.8070007@freebsd.org> <20070213075627.63126.qmail@web34502.mail.mud.yahoo.com> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB4@ms05.mailstreet2003.net> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB5@ms05.mailstreet2003.net> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB6@ms05.mailstreet2003.net> <45D1F30A.6080403@freebsd.org> <45D20037.1040102@freebsd.org> <45D20DA0.4050600@elischer.org> In-Reply-To: <45D20DA0.4050600@elischer.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.88.4/2562/Tue Feb 13 09:18:56 2007 on mh1.centtech.com X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=8.0 tests=AWL,BAYES_00 autolearn=ham version=3.1.6 X-Spam-Checker-Version: SpamAssassin 3.1.6 (2006-10-03) on mh1.centtech.com Cc: freebsd-fs@freebsd.org, Ivan Voras Subject: Re: UFS2 with SAN X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Feb 2007 20:07:38 -0000 On 02/13/07 13:12, Julian Elischer wrote: > Eric Anderson wrote: >> On 02/13/07 12:09, Ivan Voras wrote: >>> Eric Anderson wrote: >>> >>>> You might look at tdfs (fuse module from Ivan Voras I believe). It's >>>> probably horribly beta (not knocking it Ivan - I'm sure it's an amazing >>>> start), so lots of testing would need to be done. It's also most likely >>>> not high performance. >>> Yes, I'm realistic about it - it is "horribly beta" :) >>> >>> Two reasons: one: I couldn't amass enough interested parties to help >>> test it (and possibly work on it), and second: while it's a nice problem >>> to tackle, I don't [yet] need it that badly to start working on it >>> outside of free time). In any case, TDFS doesn't have locking because >>> FUSE doesn't have it (or didn't when I started doing it), so it stays >>> single-writer-multiple-readers until that changes. >>> >>> I'm thinking of re-creating it in kernel mode (and in this form it could >>> also have locking) but not any time soon. Maybe during the summer (SoC? >>> probably.). >>> >> >> I've thought about this too - and even thought about making it a file >> system layer, like nullfs, with a network-kernel piece to notify the >> readers of changes, etc. I'm not certain if it would work or not.. > > it will be very interesting to see the outcome from Matt's cluster > filesystem on Dragonfly. Is it actually being developed? Last I checked, there was talk, but no code.. :( Eric