Date: Thu, 06 Nov 2008 07:50:18 -0500 From: kurt seel <kurtseel@primetime.com> To: Steve Kargl <sgk@troutmask.apl.washington.edu>, freebsd-geom@freebsd.org Subject: Re: Method to mirror a single partition across the net Message-ID: <4912E80A.7090405@primetime.com> In-Reply-To: <20081106042504.GA40254@troutmask.apl.washington.edu> References: <20081106042504.GA40254@troutmask.apl.washington.edu>
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Tell me if this helps : http://bsdtips.utcorp.net/mediawiki/index.php/Mirroring_over_network If anything is wrong or unclear let me know. Steve Kargl wrote: > I was directed on freebsd-questions to ask my question on > freebsd-fs, but freebsd-geom is perhaps a mosre appropriate > list. > > I've read the Handbook's chapter on GEOM, gmirror(1), geom(8), ggated(8), > and ggatec(8), and I've search the web for a solution to the following > issue. > > I would like to mirror a single partition on system A to a partition on > system B. It would appear a combination of gmirror and ggated would work, > but I haven't found any example on setting up two systems. > > To be specific, /etc/fstab on the 2 systems is > > # Device Mountpoint FStype Options Dump Pass# > /dev/ad4s1b none swap sw 0 0 > /dev/ad4s1a / ufs rw 1 1 > /dev/ad4s1e /data ufs rw 2 2 > /dev/ad4s1d /usr ufs rw 2 2 > > I want to mirror 192.168.0.20:/dev/ad4s1e to 192.168.0.21:/dev/ad4s1e > > Does the following method work? > > On 192.168.0.21: > > # umount /dev/ad4s1e > # echo "192.168.0.21/24 RW /dev/ad4s1e" > /etc/gg.exports > # ggated > > On 192.168.0.20: > > # ggatec create -o rw 192.168.0.21 /dev/ad4s1e > # gmirror label data /dev/ad4s1e > # gmirror insert data /dev/ggate0 > > and /etc/fstab becomes > > # Device Mountpoint FStype Options Dump Pass# > /dev/ad4s1b none swap sw 0 0 > /dev/ad4s1a / ufs rw > 1 1 > /dev/ad4s1d /usr ufs rw 2 2 > /dev/mirror/data /data ufs rw 2 2 > > This also leads to the question that if one is (or both systems are) > rebooted, does the mirror automagically come back on boot? > >
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