Sending messages to the IMS master terminal
Each IMS™ master terminal (MTO) in the sysplex has a unique LTERM name, and if they are VTAM® terminals they also have unique node names.
Each IMS assigns
its primary MTO the default LTERM name DFSPMTO
as a generic
name. Each secondary MTO is assigned DFSSMTO
as the default
generic name. You can override either of these default generic names
during IMS system definition
by using the DFSDCxxx member of IMS.PROCLIB. The generic name is translated
to the real LTERM name when a message is sent to the MTO.
Restriction: If you use the DFSDCxxx member to override a default
generic name, you must not specify a statically-defined node name.
Also, the node name you specify must have the same physical characteristics
as the default node you are overriding. If you change the DFSDCxxx
member, you must perform a cold start of IMS.
In a shared-queues environment, because each MTO has a unique LTERM name, a message can be sent to any MTO in the sysplex if you use the real LTERM name (not the generic name).