Sun GlassFish Enterprise Server v2.1.1 Performance Tuning Guide

Checkpointing Stateful Session Beans

Checkpointing saves a stateful session bean (SFSB) state to the HADB so that if the server instance fails, the SFSB is failed over to another instance in the cluster and the bean state recovered. The size of the data being checkpointed and the frequency at which checkpointing happens determine the additional overhead in response time for a given client interaction.

You can enable SFSB checkpointing at numerous different levels: