TM batch processing

A TM batch program acts like a DB batch program with the following differences.

• It cannot access full-function databases, but it can access Db2 for z/OS® databases, GSAM databases, and z/OS files.
• To issue checkpoints for recovery, you need not specify CMPAT=YES in your program's PSB. (The CMPAT parameter is ignored in TM batch.) The I/O PCB is always the first PCB in the list.
• You cannot dynamically back out a database because IMS does not own the databases.

The IEFRDER log DD statement is required in order to enable log synchronization with other external subsystems, such as DB2® for z/OS.