How the scheduler uses special resources

The scheduler keeps a record of the state of each resource and its allocation. The scheduler does not know that PAYROLL.DATABASE is a database and it is unaware that TAPES resources are tape drives. Only you know this and you are responsible for making sure that IBM Z Workload Scheduler knows the true availability of the objects that the resources represent.

VSAM will not tell IBM Z Workload Scheduler when the payroll database is opened, and z/OS is not going to tell IBM Z Workload Scheduler when you vary a tape drive offline. This is your responsibility.

The best way to tell IBM Z Workload Scheduler about changes in special resources is through the RODM interface. System components such as AOC/MVS inform RODM about changes to their resources. You can subscribe to RODM updates by setting the RODMTASK keyword on the OPCOPTS initialization statement, and using the RODMOPTS initialization statement. For details about initialization statements, see Customization and Tuning.

If you do not have RODM installed, and for resources that RODM does not know about, you can automatically notify IBM Z Workload Scheduler about changes in resources by intercepting messages (NetView® can do this) and issuing IBM Z Workload Scheduler SRSTAT command, or calling the EQQUSIN subroutine. If you cannot automatically notify IBM Z Workload Scheduler of a change in resource status, use the Special Resource Monitor.