To all- Two questions: 1. Zope/ZEO Scaling. I spent several hours over the past 3 days reading about Zope scalability with ZEO. I am now looking for numbers. Two questions (nearly one and the same) which I did not find answered: a. How well does ZEO scale in DATA SIZE (not availability). i.e. How many items can I have in a folder? How many users/objects can it handle? b. Numbers. There were no specific configuration numbers which I found. How many objects? How many users? How much data? I'm looking to be able to handle at least 40,000 user objects and a similar number of other larger data objects of various sizes (2k - 20k+). Users could be pushed off to an ldap server or some other environment via the LoginManager Mod etc, however I would still have 40,000 user folders in a single folder. Much of my application is of course generate once, serve a million times, but almost all objects can expect regular changes. Currently I have implemented the bulk of my objects in an SQL database which I am serving through a Zope front end. A pure Zope object setup however offers some conveniences over my setup in terms of possibly simpler access controls and, if ZEO lives up to it's claim, simpler scalability. I would be interested in hearing users comments towards ZEOs ability to scale Zope and any specific numbers from various Zope/ZEO setups. Numbers from single Zope Installs are also very welcome. 2. Groups. I have also written my own Authentication system built off of an SQL database to accommodate for groups, and group based access controls. I have read the documentation on Zope3's plan for Groups of principles, however seeing as Zope3 has not even released a build yet I believe I will need to roll my own in this area. I have done some google searching but not found any other Zope modules to handle group based authentication. If anyone knows of such a module I would be very interested in knowing more. Thank you all for your time. Sincerely, Eric Seidel