Hi Dan,
  <vendor>
  Take a look at the following address for how Inprise in
Inprise Application Server 4 implements what you need :
http://www.borland.com/devsupport/appserver/faq/Availability_Scalability_Performance.html

This is from the document there :

Failover is supported by leveraging the Naming Service and the osagent. We support 
failover of all types of EJBs. To summarize the behavior:

2) Entity Beans. From the Container standpoint, Entity Beans are similar to Stateless 
Session Beans, except that before being able to use a replica entity, it needs to be 
loaded in. The current transaction will fail, as it should. Both the resource and the 
synchronization objects associated with the original (failed) entity in VM 1 will be 
unavailable, and the transaction manager, presuming rollback (as per the OTS/JTS 
specification) will roll back the current transaction. However, subsequent 
transactions will simply fail-over to use the replica entity in VM 2, and will 
continue correctly.




</vendor>

eyal.

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