Nope, I just used the man pages for stuff like this ...

On Sat, 26 Jul 2003, User KATRINA wrote:

> Do you have any URL's with info on UNIONfs (setting up, etc.) - I'll look
> into this and NFS - Thank you!
>
>
> On Sun, 27 Jul 2003, The Hermit Hacker wrote:
>
> > On Sat, 26 Jul 2003, BSD wrote:
> >
> > > IMHO, the best way would be to use mount_union or mount_null (I still
> > > can't figure out what's the difference between them...) of the ports
> > > directory. However, that said, I tried that myself about a year back,
> > > and accesses in the jail caused my FreeBSD machine to lock up solid. So
> > > I guess the warnings in the BUGS section of the mount_union and
> > > mount_null man pages are still in full effect.
> >
> > *Alot* has changed in a year ... I use UNIONFS to share between 60 jails
> > on one server right now, and the server has been purring *knock on wood*
> >
> >             up  19+08:28,     0 users,  load 10.66, 11.52, 10.17
> >
> > As for the difference between UNION and NULL ... and someone more
> > knowledge will hopefully correct me, but based on my experience ...
> >
> > If you UNIONfs a file system over top of another, you can use NULLfs to
> > "seperate" the two ... as an example, if you UNIONFS /usr/ports under
> > /jail/usr/ports and do a du of /jail/usr/ports, you will get everything
> > ... if you NULLFS mount /jail/usr/ports to /null/usr/ports, and do
> > /null/usr/ports, you will get only those files that are *on*
> > /jail/usr/ports ...
> >
> > Basically, NULLFS gives the same result as if you unmounted the UNIONFS
> > and looked at /jail/usr/ports ...
> >
> >
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Marc G. Fournier                   ICQ#7615664               IRC Nick: Scrappy
Systems Administrator @ hub.org
primary: [EMAIL PROTECTED]           secondary: [EMAIL PROTECTED]|postgresql}.org
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