Post-Installation Configuration Considerations › Sysplex Coupling Facility

Sysplex Coupling Facility

CA Top Secret uses the definitions in the Coupling Facility Resource Management (CFRM) policy to manage coupling facility storage. The CFRM policy resides in a CFRM couple data set created with the IBM IXCL1DSU format utility program.

If the coupling facility supports structure duplexing, the CFRM couple data set should be formatted with the ITEM NAME(SMDUPLEX) NUMBER(1) statement.

To create the administrative CFRM policies, use the IBM utility program IXCMIAPU. To activate, change, or rebuild the CFRM policy use the z/OS operator command SETXCF.

CFRM Policy

To set up the CFRM policy, you must know which subsystems and applications in the installation will use the coupling facility and the structure requirements of each.

Use the IBM utility program IXCMIAPU to define the CFRM policy to:

• Identify each coupling facility and each structure.
• Specify the size of each structure. The structure size will initially be allocated at the INITSIZE you specify. The maximum size of the structure is defined by SIZE. Use the TSSFAR utility to run a TSSFAR SFSTATS report, which will recommend the XES structure size. You can use this to help determine the structure size you want to specify in the CFRM policy. Other considerations are discussed in the IBM guide MVS Setting Up a Sysplex.
• Specify the preference list (PRELIST), which is an ordered list of coupling facility names in which the structure can be allocated.
• Specify an exclusion list of structures that are not to be allocated in the same coupling facility as the structure.
• Specify DUPLEX(ALLOWED/ENABLED) if the structure is going to be duplexed.

Every application specifies the required structure types, as well as the name and size of the structure or structures it uses. CA Top Secret uses the SYSPLEX control option to provide this information.