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The Control-M Journal file collects data about changes occurring in the Control-M Active Jobs file, the IOA Conditions file, and the Control-M Resources file during the Control-M working day. This permits forward recovery of the Control-M environment to any time of the day you might choose.
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, the CTMRSTR utility 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 INCONTROL for z/OS Administrator Guide. Activation of this feature is described under the JRNL parameter in the INCONTROL for z/OS Installation Guide.
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