Specifying takeover commands—DFHCLT TYPE=COMMAND

This macro allows you to specify the commands to be used by the alternate CICS® system during takeover.

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>>-DFHCLT--TYPE=COMMAND--,COMMAND=command-string---------------><

COMMAND=command-string
Defines a command that is passed to MVS™ for execution. CICS does not interpret this command.

The command that is issued in this way most frequently is CEBT PERFORM TAKEOVER.

In multiregion operation (MRO), where there is a simple hierarchy of master and dependent regions, a failing master region can issue this command to each of its dependent regions, if it is necessary that they also move to another CPC.

In a more complex multiregion operation, a failing master region can issue this to its coordinator region, and the coordinator can issue the same command to other master and dependent regions in the same hierarchy of regions. Hence, many MRO-connected regions can move together to another CPC, without operator intervention.

Here are some examples: