JAL case study
At Acme Anvils, the batch workload is divided into two categories:
- Production.
- Non-production.
AACS and the users have agreed that production work will always receive higher service. To improve system thruput, AACS separates the workload into:
- Jobs that do not require tapes (non-setup).
- Jobs that require tapes.
The non-setup work is further subdivided by CPU time requirements. 2 minutes is the boundary.
To give the users some flexibility, two levels of service are supported:
- Priority.
- Standard.
Because BMC ThruPut Manager automates classing and priority decisions, users need only know how to request priority service. For Acme Anvils, this is done by simply submitting jobs in class B rather than the default class of A.
To control limited resources, AACS also wants to implement these rules:
- Jobs requiring more than two minutes of CPU must be classed separately.
- Jobs that need between 600 megabytes and 1 gigabyte of temporary DASD space must be placed in a special class (only one initiator).
- Jobs asking for more than twelve tape units, or jobs needing more than 1 gigabyte of temporary DASD space, are to be treated as errors.
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