In the system initialization phase, the following functions are executed for the job management system:
The job stream/class definitions and class access authorizations are read in from the SJMSFILE.
A copy of the SJMSFILE (type ISAM) is made and stored under the name SJMSFILE.WORK (type SAM).
The system scheduler and the class scheduler are activated.
The number of objects (streams, classes, access lists etc.) read from the SJMSFILE or SJMSFILE.WORK file is output on the console.
If the SJMSFILE should be defective or not present during startup, the SJMSFILE.WORK file generated during the previous session functions as a substitute. Since the SJMSFILE has to be recreated, it is advisable to ready a batch job with the corresponding JMU run.