About 17902 registered users is not so bad but my goal is around 30000 users and I need 100 to 200 concurent contributors...

I can't engaged a big project like this without any documentation about architecture, and without any performance issues to concurent users and contributors.

By the way, is LDAP authentification (Microsoft Active Directory) supported with multi organisational units?

What was the initial goal for this project ?

Can I find any story about it ?

Thanks.