Hardware recommendation!

[slacker]

Hi all, Im asking for a hardware recommendation, I will install zimbra for more than 1000 users.
between 300 and 400 users will connect concurrently.

Thanks in advance!
Dario

[uxbod]

How much money do you have to spend ?

Have a read of Performance Tuning Guidelines for Large Deployments - Zimbra :: Wiki for some very useful information with respect to sizing and hardware.

Also, are you looking to run ZCS NE or FOSS ?

[webman]

Will your users be using exclusively the Web Client or IMAP/POP; or a mixture?

In our LAN environment, we run Zimbra on a Dell PowerEdge 2950 - Dual Quad-core Xeon 2.2GHz (each), 8GB RAM, 15,000rpm SAS drives and Gig ethernet. With 1000 accounts we have around 120 concurrent users (web client) at peak times and there is no degradation in performance. Load average stays below 1 and there's usually between 2-4GB RAM free and no swap usage.

Hope that helps.

[slacker]

thanks for your answers, the user will use a mixture between ajax webclient and the outlook connector.