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The CA OPS/MVS SSM facility automates and controls the management of system resources such as started tasks, subsystems, JES initiators, and VTAM nodes.
The states of started tasks, subsystems, and other resources are always changing. They are continually started, stopped, and recycled. Often there are dependencies between resources and you cannot stop or start a resource until some other resource has been initialized or stopped. For example, TSO cannot start until VTAM initializes, and VTAM cannot be stopped while TSO remains active. Sometimes, a system ABEND or other system problem causes a started task or subsystem to terminate abnormally, requiring the operator to recover or restart it.
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