For both VSAM:
and BDAM files
- The active and alternate CICS® region must refer to the same data sets.
To ensure that they do, you can define the files using the DSNAME and DISP
parameters, and allow CICS to allocate the data sets dynamically. Omitting DD
statements in the job streams for the active and alternate CICS regions minimizes
the risk of inconsistency in data set naming.
- The alternate CICS region does not open the data sets before takeover
occurs.
- If the data sets are allocated at job step initiation, the JCL defining
the data sets must specify DISP=SHR.
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