Persistency context for SFSB in clustered application servers? Transactional or extended ?

[rana izzat]

Which is the best approach (transactional entity manager and extended entity manager) for handling transactions in stateful session bean with JPA in clustered application server?

If extended context entity manager is chosen, data is stored in memory always synchronized with database beyond a transaction.

Can you please provide me the clarity to choose right persistency context?

Regards,
rana