Sun Java System Application Server 9.1 Deployment Planning Guide


J2EE applications’ need for session persistence was previously described in Session Persistence. The Application Server uses the high-availability database (HADB) as a highly available session store. HADB is included with the Application Server Enterprise Edition, but in deployment can be run on seprate hosts. HADB provides a highly available data store for HTTP session and stateful session bean data.

The advantages of this decoupled architecture include:

Note –

HADB is optimized for use by Application Server and is not meant to be used by applications as a general purpose database.

For HADB hardware and network system requirements, seeHardware and Software Requirements in Sun Java System Application Server 9.1 Release Notes. For additional system configuration steps required for HADB, see Chapter 2, Installing and Setting Up High Availability Database, in Sun Java System Application Server 9.1 High Availability Administration Guide.