SYSTEM statement overview

The SYSTEM statement defines various system-wide options, that is, they apply to all terminals and users in the IBM Session Manager environment.

Many of the values defined for parameters on the SYSTEM statement may be overridden for individual users or terminals by specifying the USER, TERMINAL and/or PROFILE statements appropriately. In addition, session options may be centralized by specifying them on the APPL statement. In this way, the system can be configured to cater for the specific requirements of groups of terminals or users, and for individual sessions. For this reason, it is logical to place the SYSTEM statement at the front of the configuration deck.

The SYSTEM statement is completely optional and IBM Session Manager defaults to the values given in the individual parameter descriptions if the statement is omitted. See also General points.

In an OLA system there is a ISZSYSxx configuration member (stored in the PDS(E) allocated to the DDNAME of SYSTEM) for each IBM Session Manager instance that shares the configuration, where xx is the unique identifier for the instance. A value of BT is not allowed as this is used by Batch Administration and a value of CM is not allowed as this is the reserved name for the common SYSTEM statement ISZSYSCM.

The ISZSYSCM member contains SYSTEM parameters common across all IBM Session Manager instances and the ISZSYSxx member just contains the SYSTEM parameters unique to that IBM Session Manager instance. By default, that is, as generated by the Enabler or by the sample batch job ISZBACOM, the ISZSYSCM and ISZSYSxx members will contain the ACB, LOCALNODE, SESACB, TCP and VERBOSE parameters; however, these members may subsequently be modified (using OLA, the IBM Session Manager Administration Plug-in, or the Batch facility) to reflect your installation's requirements.

Any updates to the ISZSYSCM member may also affect other IBM Session Manager instances using this shared configuration. You should ensure that you modify and optionally Activate the correct SYSTEM member.

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