The Portal Server provides support for the following application servers to be used as the web application container, in addition to the JavaTM Web Server software:
Sun JavaTM SystemApplication Server Enterprise Edition
BEA WebLogic ServerTM Server 8.1 SP 2
IBM WebSphere® Application Server 5.1
Portal Server runs in the context of a web application container, which can be either a web server or one of the application servers mentioned above, depending on your deployment.
Running Portal Server on an application server enables you to:
Decouple the portal platform from the application server platform, allowing you to choose the best combination of Portal Server and application server for your organization
Call Enterprise JavaBeansTM architecture and other J2EETM technologies that run in the application server container
Use application server clustering, which provides scalability and high availability
Use session failover in clustering (currently available on BEA WebLogic Server andApplication Server Enterprise Edition)