From owner-freebsd-hackers Wed Jan 29 14:59: 2 2003 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4525A37B401 for ; Wed, 29 Jan 2003 14:59:01 -0800 (PST) Received: from sabre.velocet.net (sabre.velocet.net [216.138.209.205]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8511243F75 for ; Wed, 29 Jan 2003 14:59:00 -0800 (PST) (envelope-from dgilbert@velocet.ca) Received: from trooper.velocet.ca (trooper.velocet.net [216.138.242.2]) by sabre.velocet.net (Postfix) with ESMTP id DAB7B137FCD; Wed, 29 Jan 2003 17:58:59 -0500 (EST) Received: by trooper.velocet.ca (Postfix, from userid 66) id 617957462A; Wed, 29 Jan 2003 17:58:59 -0500 (EST) Received: by canoe.velocet.net (Postfix, from userid 101) id A0217567628; Wed, 29 Jan 2003 17:58:56 -0500 (EST) From: David Gilbert MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15928.23728.549120.559276@canoe.velocet.net> Date: Wed, 29 Jan 2003 17:58:56 -0500 To: "Matthew N. Dodd" Cc: David Gilbert , freebsd-hackers@FreeBSD.ORG Subject: Re: Network block device. In-Reply-To: <20030129173416.U8642@sasami.jurai.net> References: <15928.6900.948346.474717@canoe.velocet.net> <20030129170512.Y8642@sasami.jurai.net> <15928.21248.483298.203713@canoe.velocet.net> <20030129171908.G8642@sasami.jurai.net> <15928.21992.586804.141143@canoe.velocet.net> <20030129173416.U8642@sasami.jurai.net> X-Mailer: VM 7.07 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >>>>> "Matthew" == Matthew N Dodd writes: Matthew> On Wed, 29 Jan 2003, David Gilbert wrote: >> As I understand, NBD is just a little driver that lets you mount >> foo:/dev/ad0s1g over the network and proxies the block transactions >> across. Matthew> Right, you still have to stripe/mirror on the client side Matthew> though. I don't think it will be all that bad. Matthew> Any chance of you testing Linux NBD and FreeBSD Matthew> NFS/vnconfig/CCD? it doesn't work that way. the result of NBD is a /dev/nbd0 not a filesystem. Block 0 of /dev/nbd0 is block 0 of /dev/hda1 (say). nbd runs as a server on the node with the disk and as a client on the node using the disk. Yes, you still stripe on the client side... but you stripe across directly mapped block devices (no NFS involved). Dave. -- ============================================================================ |David Gilbert, Velocet Communications. | Two things can only be | |Mail: dgilbert@velocet.net | equal if and only if they | |http://daveg.ca | are precisely opposite. | =========================================================GLO================ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message