Date: Wed, 5 Feb 2003 15:53:56 +0200 (EET) From: Narvi <narvi@haldjas.folklore.ee> To: "Matthew N. Dodd" <winter@jurai.net> Cc: "Brandon D. Valentine" <brandon@dvalentine.com>, David Gilbert <dgilbert@velocet.ca>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: Network block device. Message-ID: <20030205153754.O43637-100000@haldjas.folklore.ee> In-Reply-To: <20030129185154.U8642@sasami.jurai.net>
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On Wed, 29 Jan 2003, Matthew N. Dodd wrote: > On Wed, 29 Jan 2003, Brandon D. Valentine wrote: > > IMO NBD is less of a hack than you think it is. It is one of the > > necessary components for creating a single system image from a cluster > > of commodity hardware and this is something Linux developers are working > > earnestly on. They're targeting a poor man's NUMA. > > Sorry, it still sounds dumb. > > They should really look at Sprite. (And anyone thats doing clustering and > not looking at VMS deserves what they get.) > > On a real cluster running a single image all all the drives would just > show up. There wouldn't be any hacking going on. Stuff like this kind of > requires 64 bit machines to be at all useful. > Only as long as only clusters with some level of single system image (for various values of it) are allowed to be real clusters. But calling NBD a necessary component of a single system image is very probably wrong - its almost at cross purposes to getting to a single system image cluster. NBD is neither needed (you could use say transaction based function shipping for one example) nor sufficent. > -- > | Matthew N. Dodd | '78 Datsun 280Z | '75 Volvo 164E | FreeBSD/NetBSD | > | winter@jurai.net | 2 x '84 Volvo 245DL | ix86,sparc,pmax | > | http://www.jurai.net/~winter | For Great Justice! | ISO8802.5 4ever | > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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