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Re: Running several instances of an fs server...


From: Marcus Brinkmann
Subject: Re: Running several instances of an fs server...
Date: Tue, 23 Jul 2002 17:02:16 +0200
User-agent: Mutt/1.4i

On Tue, Jul 23, 2002 at 04:41:39PM +0200, Fredrik Liljegren wrote:
> > A user will not (in most cases) 'mount' a disk stored filesystem which is
> > stored on a device or partition, for example (and it will not have the
> > permissions to do this). The user can 'mount' a filesystem stored in a file
> > (this is called a loopback device in linux).
> 
> Many systems might have several users who have access to the
> disk-drive; allowing them to mount disks hidden in their
> home-directory.  Maybe they're not actually sitting at the computer at
> the same time, but I have no problems imagining me inserting a disk in
> my computer and trying to access it from work, while my girl friend
> uses the computer at home.  That could lead to the discussed situation
> of the same device mounted twice, r/w, without the users realizing it.

Don't do that.  Agree up-front with your girl friend where to mount it. 
Set a passive translator there.  You will have to decide under which user id
the filesystem should run.

Then, if you want to integrate this filesystem elsewhere into your tree, use
the firmlink translator, if a symlink is not good enough.

Adding the feature to the filesystem server that allows it to mount itself
to several nodes will _not help you_, as you would still have to know that
another instance is running and ask that to attach itself to the node. 
There is no solution for your problem but prior cooperation between humans.
Hey, at this occasion you might also ask your girl friend out for a dinner or
cinema.  ;)

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    address@hidden
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
address@hidden
http://www.marcus-brinkmann.de/



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