Date: Mon, 12 Feb 2007 13:47:28 -0600 From: Tillman Hodgson <tillman@seekingfire.com> To: freebsd-questions@freebsd.org Subject: Re: Mounting multiple NFS shares to the same point Message-ID: <20070212194728.GE543@seekingfire.com> In-Reply-To: <20070212194204.GD543@seekingfire.com> References: <20070212170553.GA543@seekingfire.com> <54db43990702121104x7aea5f53tab517d32e85c9b19@mail.gmail.com> <20070212194204.GD543@seekingfire.com>
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On Mon, Feb 12, 2007 at 01:42:04PM -0600, Tillman Hodgson wrote: > (Note that that in this case I'm backing up TO the NFS mount, and it's > possible that the same NFS share could be mounted on the same spot > twice, depending on how long it takes for the daily backup job to run). Following up on my own post, I starting digging into other backup scripts I've written over the years and ran across snippet on a FreeBSD 4.11 box: ### Perform daily backup of ~tillman # Clean up my backup partition # Note! We delay this by 2 hours because mount/umount cause mountd to be # HUPed, which is not atomic and causes a moment EPERM (permissions error) if # any other machine is currently trying to write via NFS sleep 7200 /sbin/umount /exports/tillman.backup1/ && \ /sbin/newfs -v -U /dev/vinum/tillman.backup1 &&\ /sbin/mount /exports/tillman.backup1/ && \ /sbin/dump 0f - /exports/tillman | (cd /exports/tillman.backup1; /sbin/restore -rf - ) 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. -T -- Master Tung-shan interviewed a new monk: "What's you name?" "Pen-chi," the monk answered. "Say something more." "I won't." "Why not?" "My name is not Pen-chi." The Master was much impressed. - Zen Mondo
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