Local option

Local Option uses the MVS™ operating system Program Call function for communication between the IMS™ TM resource adapter (also known as IMS Connector for Java™) and running in WebSphere® Application Server for z/OS® and IMS Connect.

Local Option has been deprecated and its functionality was stabilized in a previous release. However, Local Option will continue to be supported in this release at the stabilized level of functionality.

When your application is running on WebSphere Application Server for z/OS, the connection between the IMS TM resource adapter and IMS Connect can be either a TCP/IP connection or a Local Option connection. Local Option provides a more direct connection that does not go through TCP/IP. Instead, it uses MVS Program Calls for cross memory communication between IMS Connector for Java running in WebSphere Application Server for z/OS and IMS Connect running in its own address space provided both WAS and IMS Connect are running in the same MVS image.

Like TCP/IP connections, Local Option connections to IMS Connect are associated with an identifer called the client ID. IMS Connect ensures the uniqueness of these client IDs for all Local Option connections which it allows to be connected to it.

Unlike TCP/IP which has two types of managed connections, shareable persistent and dedicated persistent, there is only one type of managed Local Option connection to IMS Connect that is supported; the shareable persistent Local Option connection.

Note: Alternate Client ID is not supported with local option.

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