CICS VSAM Transparency for z/OS, Version 1.2


Disabling access to a VSAM data set

After a data set has been migrated to DB2®, the VSAM data set is no longer accessed by CICS®. Providing that the data set is defined in the CICS VT DST, CICS programs will access the data in DB2.

If the CICS VT interface in CICS is stopped for any reason or a file migration status is set to INACT, CICS attempts to process file control calls to this file against the actual VSAM data set. You should take steps to ensure that the original VSAM file cannot be accessed accidentally. For example, update the file control definition and specify a non-existent data set name. If you need to be able to stop and start the file, as discussed in Controlling migrated data sets in CICS, the data set name in the file control definition must exist. Do not use the dummy data set that is required for CICS VT batch programs.





Last updated: December 6, 2013 20:43:8

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Timestamp icon Last updated: Friday, 6 December 2013


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