rsync and moving files [Re: backup w/ snapshots]

Bob Johnson fbsdlists at
Mon Aug 29 16:44:57 GMT 2005

On 8/29/05, Norberto Meijome <freebsd at> wrote:
> Svein Halvor Halvorsen wrote:
> > * Norberto Meijome [2005-08-30 00:32 +1000]

> I guess the proper way to do this (if you are REALLY REALLY worried 
> about that extra spaced used for snapshots in the remote site) would be 
> to implement a GEOM class that knows about the remote site and the 'mv' 
> condition and communicate to the remote end.

In principle, it already exists.  In practice, it might need more work.

Use a ggated(8) + ggatec(8) pair to establish a remote volume that
looks local, then use gmirror to make it a mirror of the local drive.

The big gotcha is that ggated/c only moves i/o requests and data via
the net, it doesn't move ioctls, so some things just won't work
remotely.  Or at least, that's what I've read.

> hmm...what about network operating systems like AFS or CODA (not that I 
> know much about them, I just read some stuff on those being
> distruted,etc..)

Although CODA would probably work, I think the GEOM solution, if it
works, would be far easier to implement.

> Let us know how you solve this.
> Regards,
> Beto
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