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Date: Wed, 07 Jan 2004 09:26:13 +0100
From: Martin Brecher <listuser@mb-itconsulting.com>
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To: Rob <listone@deathbeforedecaf.net>
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cc: "Chad Leigh -- Shire.Net LLC" <chad@shire.net>
Subject: Re: jails; sharing parts of file system;	mounting pieces of file
	system in other positions, etc.
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Chad, Rob, -
>>On linux you can do a
>>
>>% mount -bind olddir newdir
>>
>>to remount a piece of the FS somewhere else.  The NullFS on FBSD seems
>>to allow similar things.  However, as much as I could find on NullFS
> 
[...]
> 
> I'm currently setting up my 4.9-RELEASE webserver to do something
> similar - each jail gets a root filesystem, but /usr is shared readonly
> by all of them. The exception is /usr/local/etc, which is symlinked to
> /etc/local (in the jail).
> 
> My impression, though I don't have much to back this up with, is that
> nullfs is reliable enough in read-only mode. Other folks may have a
> different opinion.
> 

Personally, I use (localhost) nfs-mounts to remount parts of the file 
system somewhere else. Works quite well.

Greetings,
Martin Brecher