Session termination

Session termination releases the workstation from its current logical connection to the VTAM® application program. It makes the workstation available for session with other VTAM applications, or communications can be terminated altogether.

There are two types of session termination: orderly and immediate.

Definitions:
  • In an orderly termination, the workstation is allowed to complete normal processing before the session is terminated.
  • An immediate termination forces the workstation to terminate the session unconditionally.
Session termination can be invoked by any of the following:
  • The IMS master terminal operator
  • The VTAM network operator
  • The workstation

The following figure summarizes the two types of session termination processing.

Figure 1. Termination processing
The sequences of processing for an orderly and an immediate termination are shown from IMS, through VTAM, to a Finance Controller. In an orderly termination a SHUTDOWN complete command returns to IMS.

Each installation must determine specific procedures for session termination. When developing the procedures, be aware of the requirements for session termination processing.