Brian Sullivan writes:

... ZEO -- you mean the clustering tool ? I presume you are saying that I might need more than server to do the job? I mean ZEO but it is not necessary to run it on a different server (host).

ZEO will give you the ability to do ZODB related work in external Python scripts outside of Zope. Have a look at the "LocalProc" product. I do not know it myself, but it may help you to manage such off-loaded processes. Dieter PS: Please stay on the list.