Hi! Actually I've two Plone "working envinronment" and one zope, each in a different machine: - one, with two zope 2.9 istances (one for developing), running both multiple Plone 2.5 instances - one, with zope 2.9, running multiple Plone 2.5 instances - one, with zope 2.7.9, running zope only applications We have bought "big iron" hardware now, where I can do almost everything (with a fiber channel network storage, multiple rack servers). tipically, I use one instance to develop, and one to deploy. This mean different zope instances which shares only the base, and having different products. I would like to have an easy way to develop without having to be subject to dependencies from other envinroment, minimize the effort to mantain it and focus on doing things :) Is one big zope installation, with multiple instances, well suited for this tasks? Or is better different zope versions? What about the various Data.fs, is better to have them separated by application or by zope envinroment? I mean all the Plone in a single Data.fs or each one in a separated Data.fs? So, what is the best approach to migrate the three servers?