To enable SFSB checkpointing at the SFSB level, set availability-enabled="true" in the ejb element of the SFSB’s sun-ejb-jar.xml file as follows:
<sun-ejb-jar>
...
<enterprise-beans>
...
<ejb availability-enabled="true">
<ejb-name>MySFSB</ejb-name>
</ejb>
...
</enterprise-beans>
</sun-ejb-jar>