Understanding XCF requirements

RMGR uses the Cross-System Coupling Facility (XCF).

During communication processes, RMGR uses the following names to establish or join XCF groups:

XCF groups

Members

BMCIRM00

One for each active RMGR

BMCIRM01

One for each active RMGR, and one for each active IMS

This group is not used with a legacy multiple-RMGR configuration.

IRMCimsid

One for the RMGR, and one entry for each batch job communicating with the RMGR

RMGR name

One for the RMGR, and one entry for each batch job communicating with the RMGR

sharegroup name

One identifying the RMGR

These names must be unique in the XCF domain.

Beginning with the Backup and Recovery product releases of August 29, 2003, if RMGR is active in the operating system, all Backup and Recovery utilities for IMS will attempt to join an XCF group that is established at RMGR startup. The operating system definitions for XCF should be reviewed and adjusted, if necessary, to ensure that the XCFMEMBER limit will not be exceeded when multiple utility jobs are initializing simultaneously. For more information, see the Installation System documentation.


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