> My company is about to implement a rather large installation which
> has to deal with up to 400 concurrent users. Our environment is as
> follows. We have bought 4 front end servers running an IBX-app on a
> Windows Terminal Server 2003 (100 users / server), one server
> working as domain controller and one back-end server. The back-end
> server is a Win2003 server dedicated to running the FireBird
> (superserver). My question is, and I know it is a tough
> one, can I expect to run into performance problems when dealing with
> 400 concurrent users on 1-2 large databases (approximately 100 MB - 1
> GB in size). The back end server is quite powerfull (2 x XEON 2.9 and
> 3 GB RAM, RAID-5). I know that I have to set CPU-affinity so that the
> OS and the database runs on separate processors.
>
> I am really interested in knowing whether anyone has experiens in
> running FireBird in a similar environment. (By the way I have read
> the user stories at IBPhoenix.com but I noticed that most of the
> companies didn't have a large number of concurrent users).
>
> Regards
> Jan Jensen

together with Phil's comments, I would also have a backup plan of a 3 tier
approach as well. 400 simultaneous users can be more easily supported with
an application layer.
Alan