The job management system offers systems support additional options for job scheduling tailored to datacenter needs:
Installing a self-defined job scheduler
Via the Assembler interface a customized job scheduler can be generated which executes as a user program under the system administration ID. The macros required for this purpose are described in the “Executive Macros” manual [30].
By means of the JMU statement DEFINE-JOB-STREAM (S-PAR operand) systems support defines additional parameters, the syntax and semantics of which are freely selectable. They are interpreted solely by the customized job scheduler.Using a system exit routine
The JMU statement DEFINE-JOB-CLASS (JOB-PAR operand) enables systems support to define additional parameters, whose syntax and semantics are freely selectable. These parameters are interpreted only by the system exit routine (system exit 32).
The data center might find it expedient to define additional parameters because, for example, the standard job scheduler does not distinguish between the following within the job classes:
very important jobs (class attribute VIMP)
important jobs (class attribute IMP)
less important jobs (class attribute NIMP)
Systems support thus defines the following for the job classes concerned:
DEFINE-JOB-CLASS...,JOB-PAR='VIMP'/'IMP'/'NIMP'