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Answer Posted / shakila vinayagam
Before using GDG , We need to create GDG index and model.
IDCAMS (the 'AMS' stands for Access Method Services),
utility is used to create GDG index.
Once the index has been created, a model data set must
be created. This model data set contains specifications
for the DCB subparameters for all data sets that will
belong to that GDG. Programmer can override this default
values if he want.
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