It does seem to be overkill, but it really depends on how intensive each user's operations are, and how powerful your servers are. For only 650 users, for most web apps, you can probably get by with 1 (or 2) load balanced web boxes, and a single decent database server (which you may wish to cluster Active/Passive if you want high availability). Specs for my current project are 25 web servers, but that's for >50,000 concurrent users at 2500 page reqs/sec. I believe, in load testing, we are able to support 6000 users across 6 load balanced web servers (the load test environment also has 2 middle tier app servers, one A/P SQL Server cluster for data, and one A/P SQL Server cluster for session state storage) Cheers Ken -- My IIS Blog: www.adOpenStatic.com/cs/blogs/ken Tech.Ed Sydney: learn all about IIS 7.0 - See you there! : -----Original Message----- : From: thelist-bounces at lists.evolt.org [mailto:thelist- : bounces at lists.evolt.org] On Behalf Of Randal Rust : Sent: Friday, 4 August 2006 7:48 AM : To: thelist at lists.evolt.org : Subject: [thelist] Harware question for enterprise application : : I am at my wits' end with our technical people, who are telling me : that we need $50K of hardware to run application. : : The current system is an Oracle 6 forms application running on an : Oracle 9i database. We have about 65 concurrent users on a daily : basis. : : I need to provide the client with an estimate for moving to a total : web-based application. The new system would enable another 2,000 users : to access the system. However, due to the nature of the business, : their usage would not be daily, and distributed so that the peak would : ready about 650 users the first, second and third weeks of any given : month. Of course, not all 650 would be using the system at the same : time. Also, these additional 600 concurrent users don't really do that : much -- they just enter and submit some data. Nothing really : intensive. : : The new architecture would be something along the lines of... : : 1. Struts Framework : 2. JBOSS application server : 3. Oracle 10g database : : ...and my technical people are telling me I will probably need three : clustered webservers, the application server and three clustered : database servers. : : Now, I don't know much of anything about hardware, but this seems a : bit overkill to me. : : Any input would be greatly appreciated. Even if it's to tell me to : listen to my technical people. : : TIA.