CICS requirements

Subzero can work with the IBM CICS product acting as a transaction manager for application programs that are accessing supported types of subsystems (such as DB2 or IMS).

Subzero supports CICS Version 4.1 and later. For the latest information about the compatibility of Subzero with a specific release of CICS, use the BMC Solution and Product Availability and Compatibility Utility on the BMC Support Central website (http://www.bmc.com/support).

Subzero requires the following modifications to the CICS environment:

  • You must add the Subzero product library to the CICS startup JCL.
  • You must add the Subzero BRDPLT00 program to the CICS program list table (PLT).

Note

DBC and the Subzero controlling agent must be executing on the LPAR before a CICS region that is participating in Subzero redirection starts on that LPAR.

For more information, see Configuring-CICS-for-Subzero.

Subzero allows CICS regions to connect to local or remote subsystems:

  • When connecting to local subsystems, Subzero turns control over to the native subsystem interface.
  • When connecting to remote subsystems, Subzero replaces the native subsystem interface with the Subzero interface. In this case, Subzero does not use or require any native subsystem interface routines.

  • To switch between remote and local connectivity, simply disconnect from the current subsystem and reconnect by using a different subsystem name.

    Note

    Before the reconnection, you might need to change the Subzero redirection option to specify a different target subsystem.

 

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