Date: Tue, 13 Feb 2007 08:38:48 -0600 From: Tillman Hodgson <tillman@seekingfire.com> To: freebsd-questions@freebsd.org Subject: Re: Mounting multiple NFS shares to the same point Message-ID: <20070213143848.GH543@seekingfire.com> In-Reply-To: <45D1ADE3.1010802@dial.pipex.com> References: <20070212170553.GA543@seekingfire.com> <54db43990702121104x7aea5f53tab517d32e85c9b19@mail.gmail.com> <20070212194204.GD543@seekingfire.com> <20070212194728.GE543@seekingfire.com> <45D1ADE3.1010802@dial.pipex.com>
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On Tue, Feb 13, 2007 at 12:24:03PM +0000, Alex Zbyslaw wrote: > Tillman Hodgson wrote: > > >If that still holds true in the -current src, the second mount will > >*definitely* cause me backup problems. I may have to move to keeping the > >NFS export always mounted, which is not ideal. > > Could you use something like ssh to transfer the files rather than > needing NFS? (I don't know if you mentioned what the NFS-end box was...). That's a good idea. In this case the NFS-end box is an Infrant appliance so I don't think I can use scp. I'll check deeper into it -- if it can do scp, that gives me more options. > I'm also not clear why you think that keeping the NFS partition mounted > all the time is so bad. If there is no access then surely the overhead > is minimal. That's true, there's no real performance hit. It's not the overhead I'm worried about, it's minimizing the exposure of the backups volume to problems. A network filesystem that isn't mounted is one that's much harder to accidently rm files from and such :-) > Your other alternative is to use lockfiles to control when things get > mounted/unmounted. If the control file is locked, you wait until it's > unlocked (or bomb with an error, whatever). Trivial in perl, and > lockf(1) looks like the way to go with shell. That's the scripting magic that I mentioned. It looks like this is likely the best solution with my current volume arrangement. In hindsight, I think should've used three shares instead of one and then the daily, weekly and monthly mounts wouldn't conflict with each other. -T -- You cannot manipulate a marionette with only one string. - The Zensunni Whip
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