Cross memory services

When TDMF is first run on an MVS system, a system linkage index (LX) is retained for the use of subsequent TDMF sessions.

The MVS name/token facility is used and remains valid until the next system IPL. The program call linkage that TDMF constructs by using this LX enables the TDMF TSO Monitor to instantly notify the Master job when an action is required for a volume or group. The default value for the NSYSLX variable (number of available system linkage indexes) in the IEASYSxx PARMLIB member is 165. The use of one of these LXs by TDMF does not cause a problem.