Date: Fri, 11 Oct 2002 11:11:11 +0200 (CEST) From: Attila Nagy <bra@fsn.hu> To: Dan Nelson <dnelson@allantgroup.com> Cc: hackers@FreeBSD.ORG Subject: Re: Sharing a SCSI bus between some computers Message-ID: <Pine.LNX.4.44.0210111059580.32616-100000@scribble.fsn.hu> In-Reply-To: <20021010172835.GA24603@dan.emsphone.com> References: <Pine.LNX.4.44.0210101808560.3631-100000@scribble.fsn.hu> <20021010172835.GA24603@dan.emsphone.com>
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Hello, > As long as BOX3 never writes data, you're okay. If this would be the scenario, all boxes would mount the FS RO :) > The problem is that BOX1/2 don't know when BOX3 has invalidated their > cached data by writing to the disk. What problems could that cause? I don't mind if BOX[1-2] reads a file and the file disappears in the middle of the transfer, if those boxes can recognize it and will not read other portions of the hard disk. In short: if they won't offer corrupt data to the clients. > What you want is a shared-storage filesystem, and there is no such thing > for FreeBSD. BTW, is it possible to do it with common SCSI storage, or it would need some sophisticated solution, like fibre channel? > Considering you can get a gigabit ethernet NIC for under $50 and a > D-Link 4-port gigabit switch for $300, you might just want to plug the > RAID into BOX3, and have BOX1/2 NFS-mount it. Oh I know this :) Actually, this is exactly what I have. But because the machines (box1-3) aren't as powerful at all, I would like to get the maximum out of them. ----------[ Free Software ISOs - http://www.fsn.hu/?f=download ]---------- Attila Nagy e-mail: Attila.Nagy@fsn.hu Free Software Network (FSN.HU) phone @work: +361 210 1415 (194) cell.: +3630 306 6758 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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