Scalability

[John Flores]

Hello-   I am very new to J2EE enterprise server world.  I want to construct a website that will capable of serving 30,000 clients at time.  What is the maximum number of clients one Orion production site can support and what is the recommended number of Orion sites needed to support 30,000 clients?  Would this involve clustering? All help is appreciated. Thanks.   John Flores