On Saturday, 07/29/2006 at 11:28 AST, Dominic Coulombe
<[EMAIL PROTECTED]> wrote:
> /var should not be shared, as there are a lot of critical files in
> there, see /var/lock .
>
> The sharing thing is more complicated that I tought...

Remember our discussion of live backups?  Live sharing is another facet of
the same issues.  To really *share* requires the consent and cooperation
of the participants, even if that's as simple as the passive "I cross my
heart and hope to die: I will not change the disk while you have it
mounted".

But as you notice, just because you *can* do a thing doesn't mean you
*should* do it.  Sharing a file system requires a great deal of analysis.
Not all applications follow the conventions on where to put config files,
customizable scripts, and executable code.

That really is the nice thing about unionfs - you don't care.  Of course,
things like unionfs just introduce another element to be managed.  E.g.
backup considerations.

TANSTAAFL.  :-)

Alan Altmark
z/VM Development
IBM Endicott

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