The MSF is not all that complicated, but since it uses network facilities, some of the following terms may be unfamiliar to you:
A system is equivalent to a VTAM domain. It usually consists of one CPU running one copy of VTAM (the SSCP) that controls all VTAM (network) resources connected to that CPU. A copy of CA OPS/MVS must be running on each system. A unique system identifier (sysid) identifies each system using the MSF.
A logical connection through a VTAM session between two systems running CA OPS/MVS. Two copies of CA OPS/MVS can communicate if an MSF session exists between them.
A system is said to be accessible to another system if an MSF session has been established between the two MSFs in each system.
A command that is issued on one system and passed on to another system for processing through the MSF.
The system to which your terminal or console is connected if you are using MSF facilities interactively. If a program is using the MSF, then the local system is the one on which the program is running.
Any system other than the local system.
Note: An MSF system can only communicate with other MSF systems with which it has established a session. For example, if systems A and B have established a session, and systems B and C have established a session, systems A and C will not be able to communicate with each other (unless a session has also been established between systems A and C).
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