The following types of persistent storage are supported for passivation and checkpointing of the SFSB state:
The local file system - Allows a single server instance to recover the SFSB state after a failure and restart. This store also provides passivation and activation of the state to help control the amount of memory used. This option is not supported in a production environment that requires SFSB state persistence. This is the default storage mechanism.
Other servers - Uses other server instances in the cluster for session persistence. Clustered server instances replicate session state in a ring topology. Each backup instance stores the replicated data in memory.
The high-availability database (HADB) - Allows a cluster of server instances to recover the SFSB state if any server instance fails. The HADB is also used as the passivation and activation store. Use this option in a production environment that requires SFSB state persistence. For information about how to set up and configure this database, see the description of the configure-ha-cluster command in the Sun Java System Application Server 9.1 Reference Manual.
Choose the persistence store in one of the following ways:
To use the local file system, first disable availability. Select the Availability Service component under the relevant configuration in the Admin Console. Uncheck the Availability Service box. Then select the EJB Container component and edit the Session Store Location value. The default is domain-dir/session-store.
To use other servers, select the Availability Service component under the relevant configuration in the Admin Console. Check the Availability Service box. To enable availability for the EJB container, select the EJB Container Availability tab, then check the Availability Service box. All instances in an Application Server cluster should have the same availability settings to ensure consistent behavior.
To use the HADB, you must first have the HADB installed and the enterprise profile selected. For information about profiles, see Usage Profiles in Sun Java System Application Server 9.1 Administration Guide. For information about HADB, see the description of the configure-ha-cluster command in the Sun Java System Application Server 9.1 Reference Manual. Then you must enable availability as described in the previous item.
For more information, see the Sun Java System Application Server 9.1 High Availability Administration Guide.