How Does a CICS or VTAM Transaction Connect to a View Database, Utilizing XMS?

Document ID : KB000044048
Last Modified Date : 14/02/2018
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Question:

How Does a CICS or VTAM Transaction Connect to a View Database, Utilizing XMS?

 

Answer:

CICS or VTAM transactions connect to a View database, via a cross-memory services (XMS) task, based on a match of the SUBSYS=... parameter defined for the transaction in the EBCXMCTR table.

A sample transaction would contain:

 EBCXMTRN TYPE=SAR,INDEX=VIEW.SYSTEM1,...,SUBSYS=xxxx

 

Correspondingly, the XMS task parameters would contain the same SUBSYS=xxxx value.

When the EBCXMCTR table is assembled, and there are no SUBSYS=xxxx fields in the transactions, then the default of SUBSYS=XMC2 (for View/Deliver 12.2) would be used.

Similarly, if there is no SUBSYS=... parameter defined in the XMS task, then the default of SUBSYS=XMC2 (for View/Deliver 12.2) would be used.