[Zope] zope on shared disk

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hi all,
what's the pros and cons of loadin zope of a shared disk aka thru nfs or samba?
 this on a LAN with Giga ether or fast ether.   reasons for this - so that we
can share database and have many frontends serving request.  is this even
possible?  

has anybody tried eddie (www.eddieware.org)?  i see this as an option too, but
the database is still the limiting factor.  i know zeo exists, but i'm a bit
tight now.

 inputs/pointers/docs welcomed

tia
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