Hi folks, I've been using Zope for a while now and found it to be an excellent solution however I've got a few enterprise questions about the scalability of Zope that just need to be answered. [ nb: I'm using V2.72 at the moment, not having moved over to V3 ] ZODB size What is the maximum size of this file and/or maximum object ID? => just how many objects can the zodb hold? millions? tens of millions..?? billions...??? I have a feeling we'll run out of ram long before actually hitting the limit but it'd be nice to know the theoretical top limit. ExtFile Managed to serve 500,000 files through extfile - anybody come across an upper limit here? Planning to serve larger sites off a SAN hopefully - has anyone tried this? Zeo and Cataloging If I have my site on one server and ZCatalog (using TextIndexNG) on another server (connected by ZEO) where does the actual index operation occur? Do just the results get propogated to the catalog? LDAP Authentication I understand that can use the LDAPUserFolder Product to provide authentication against an ldap server. Could I throw,say, 50000+ users at zope using this system? Load Balancing and Cookie Based Sessions Currently we use cookie based sessions via cookie crumbler presumably in a load balanced server setup we'd have to host acl_users ona ZEO'd izope instance somewhere on the backend? thanks in advance, any advice welcome - in a brave new world here. Tom