I want to generate statistics about the access on a zope server like you do on normal web servers (e.g. apache): 1.) What format has the Zope logfile (Z2.log ? Is it the right file ?) ?
If you are using straight ZServer the Z2.log is a common log format (CFL). It should have all the information you need.
2.) Are there any tools like 'webalizer', 'analog' ,... for zope ?
Yup. They are called "webalizer" and "analog"..(sorry, could not resist). I am using them both and they both work great. The one thing that does get a little messy is the "pages" since they are looking for ".html" etc. I personally like Analog much better as it can be customized to your hearts content.
3.) Can I analyze it with such standard tools ?
Yup and I am sure the rest would work (Summary, Sawmill, Webtrends, MKStats (if they fix the Y2K bug), Wusage).
4.) Are there any parameters I need ?
Nope. Just run them on Z2.log and enjoy. J