Yes it is possible. 

To automatically maintain long-running asynchronous processes and their current state INFORMATION in a database while they wait for asynchronous callbacks, you use a database as a dehydration store. Storing the process in a database PRESERVES the process and prevents any loss of state or reliability if a system SHUTS down or a network problem occurs. This feature increases both BPEL process reliability and scalability. You can also use it to support clustering and FAILOVER.

Yes it is possible. 

To automatically maintain long-running asynchronous processes and their current state information in a database while they wait for asynchronous callbacks, you use a database as a dehydration store. Storing the process in a database preserves the process and prevents any loss of state or reliability if a system shuts down or a network problem occurs. This feature increases both BPEL process reliability and scalability. You can also use it to support clustering and failover.