Unicenter CA-Scheduler Job Management for VSE User Guide

3.9 Defining Jobs
When you are ready to automate the selection process, set AUTO SELECT =
YES and identify where the JCL for these jobs is stored using the fields
described in the topic What JCL Does Unicenter CA-Scheduler Submit For
CPU Jobs.
3.9.3.10 What Job Fields are Used for Simulation?
Without actually executing your jobs, simulation produces reports showing:
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Which jobs would be selected
What resources would be required
When and where each job would be processed
How heavily each device would be utilized
Which jobs would be late
Which jobs would carryover to the next day
Because simulation is such an effective planning tool, take the time to supply
the data needed to run simulation. First, indicate which CPU these jobs run
on. See the topic Which CPU Should Jobs Run On for instructions showing
how that is done. Then specify the other data required to run simulations.
AVERAGE TIME allows you to override the computed average run times for
this job derived from historical data. If you specify a value here, Unicenter
CA-Scheduler uses that time for simulation. The value reflects how much time
elapsed between when the job starts and ends. If you do not specify a value
here, Unicenter CA-Scheduler averages the elapsed times for the last seven
days the job ran.
You can change the value for AVERAGE TIME to determine the impact of
production changes before they actually happen. First, run simulation with
Unicenter CA-Scheduler's computed value for AVERAGE TIME. Then key in a
different value and rerun simulation. By comparing the reports, you will be
able to see the impact of such a change on your production workload.
Unicenter CA-Scheduler uses POWER CLASS to assign jobs to partitions on
the simulation reports. POWER CLASS should correspond to the value of the
CLASS parameter on JOB statements submitted to POWER (a single character,
0-9 or A-Z). Since that field occurs on both the schedule and job base record,
you only need to specify POWER CLASS for a job if the value on its schedule
base record is not appropriate for this job.
To refine the accuracy of your simulation runs, define the resources each job
requires on the job resource record (JRR). This information is not required to
run simulation. However, unless resources have been defined, you will not be
able to USE SIMTIME to start schedules and jobs. Instruction on how that is
done are found in the topic Defining A Job's Resource Record.
Chapter 3. Maintaining the Database 3-71