Global transaction with TCP/IP

In a global transaction scope, your Java™ EE application component can access an IMS transaction by establishing a TCP/IP connection with IMS Connect.

Global transaction with TCP/IP

The IMS TM resource adapter interacts with the Java transaction manager by using the X/Open (XA) protocol to manage the global transaction and two-phase commit processing. The XA protocol defines a set of interfaces and interactions that describe how the Java transaction manager and the resource managers interact in a distributed transaction processing environment. The IMS TM resource adapter, together with IMS Connect, uses the XA protocol and works with IMS and Resource Recovery Services (RRS) on z/OS® to make consistent changes.

To use global transaction with TCP/IP, RRS must run on the same z/OS image with IMS Connect and IMS.

If both IMS and IMS Connect are at IMS 14 or later, IMS and IMS Connect do not have to be on the same z/OS image if IMS Connect is configured to support cascading global transactions. However, an instance of RRS must be running on each z/OS image.