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The Control-M Journal file collects data about changes in the Control-M Active Jobs file, the IOA Conditions file, and the Control-M Resources file that occur during the Control-M working day.
The Journal file is initialized each day during New Day processing. From that point on, for the rest of the working day, the Control-M monitor records in the Journal file all job processing activities that impact the Control-M Active Jobs file, and all prerequisite condition additions to and deletions from the IOA Conditions file and the Control-M Resources file.
If the Control-M Active Jobs file, and optionally, the IOA Conditions file and the Control-M Resources file, need to be restored, for example, following a system crash, utility CTMRSTR can be run to restore the files. The utility uses data from the Journal file to restore the files to the status they had at any specific time after the last run of the New Day procedure.
The Control-M Journal file is initialized each day during New Day processing. Therefore, the time at which the New Day procedure initialized the Journal file is the earliest time to which the Control-M Active Jobs file, the Control-M Resources file, or the IOA Conditions file can be restored.
Journaling and Restoration is an optional feature that can be activated by the INCONTROL administrator. It is described in the Control-M chapter of the INCONTROL for z/OS Administrator Guide, and activation of this feature is described under parameter JRNL in the chapter on installing Control-M in the INCONTROL for z/OS Installation Guide.
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