Group Control System: Difference between revisions

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GCS's purpose is to provide an environment to run some specific [[MVS|OS/MVS]]-based applications and networking [[middleware]] under VM. To this end, GCS provides a limited simulation of the OS/MVS APIs. While [[Conversational Monitor System|CMS]], the usual VM guest, already has OS simulation, it is not extensive enough to run some applications such as [[VTAM]].
 
Specifically, GCS provides [[Computer multitasking|OS multitasking]] support. In order to be able to spread the load over several virtual machines, GCS also implements a notion of group where each group member virtual machine can interact with one another.
 
To implement this, GCS uses several techniques: