Date: Wed, 29 Jan 2003 17:30:00 -0500 From: David Gilbert <dgilbert@velocet.ca> To: "Matthew N. Dodd" <winter@jurai.net> Cc: David Gilbert <dgilbert@velocet.ca>, freebsd-hackers@FreeBSD.ORG Subject: Re: Network block device. Message-ID: <15928.21992.586804.141143@canoe.velocet.net> In-Reply-To: <20030129171908.G8642@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>
next in thread | previous in thread | raw e-mail | index | archive | help
>>>>> "Matthew" == Matthew N Dodd <winter@jurai.net> writes: Matthew> So use vinum, CCD or add the files as swap and make a Matthew> swap-backed filesystem. Matthew> No reason to invent a totally new low level filesystem here. Actually, I can see that working ... but it's going to be a whole lot less efficient than NBD. You're doing block io that gets replicated (say ... raid 1) by vinum and then then turned back into a block transaction by md and then into a network transaction through nfs back to a filesystem transaction on the remote machine (remember md is working on the file) which is then blocked by the remote filesystem. Did I miss anything? 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. 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?15928.21992.586804.141143>