Unicenter CA-Scheduler Job Management for VSE User Guide

6.1 Commonly Asked Questions
For details on how to issue ANALYZE online, see the topics Analyzing
Schedules and Analyzing Jobs in the chapter "Maintaining The Database."
Another way to detect deadlocks is to generate the Successor Chain List report
either from batch or online in the Reporting Facility panel. This is especially
useful for dynamically ADDed jobs to make sure that the added job did not
create a deadlock.
6.1.3.2 When Should I Run Forecasts?
The forecast function allows you to predict which schedules and jobs will be
selected on a future date as well as providing a comprehensive set of reports
detailing such.
When establishing a complex criteria for a schedule or job, run forecasting to
verify the selection. You can do this by only including the schedules or jobs
that you desire. This would be the primary reason for running forecasting.
Another reason for running forecasting would be to obtain a hard copy of run
books for a specific day, group of days, or schedules or jobs within a set of
days. These run books contain job information obtained from the database and
from documentation library members specified by the DISPLY KEY field.
6.1.3.3 When Should I Run Simulation?
The simulation function simulates the autoscan process and the manner in
which jobs would run on the real system. Such things as job concurrency,
resources, and predecessor constraints are taken into consideration. Simulation
produces a set of detailed reports showing when jobs will run and whether
they will complete on time.
Normally, simulation is run to determine the affect of a new application on the
rest of the workload. This helps you determine in advance whether the
requested frequency of running the application is viable. That is, if you find
that the new application cannot fit on Wednesdays without making a lot of
jobs late, you could try to run it on another day. It may turn out that it does
not absolutely have to run on Wednesdays. The requesting department may be
able to run it on Thursdays just as easily. You can make these decisions before
establishing policy and before finding that you do not have the resources to
handle it.
Simulation could also be run to determine the effect of adding new resources
such as tape drives or a faster CPU. By using the OVERRIDE RESOURCE
command, you can add the new tape drives. Or by using the FACTOR=factor
keyword on the same commands, you can cause the simulation to change the
current average time for jobs to reflect the faster CPU.
You may also want to run simulation as part of normal daily production to
determine what is going to happen that particular day. It provides you with a
Chapter 6. Tips 6-11