CICS VSAM Transparency for z/OS, Version 1.2


Data migration considerations

FBEs and IRDs are invoked by CICS® VT during the initial data migration process. In general, an FBE does not need to consider the type of call being processed. It either builds DB2® data from VSAM data, or the other way around.

In virtually every case, an IRD must include functionality specifically for initial data migration as well as for PUT/WRITE/REWRITE calls. An IRD is sensitive to the type of call being processed.



Concept topic


Last updated: December 6, 2013 20:45:0

Concept Concept

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Timestamp icon Last updated: Friday, 6 December 2013


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