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JCL - What is a GDG? Why do we go for a GDG ? utility used to create GDG?




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asked mar September 8, 2014 12:22 PM  

What is a GDG? Why do we go for a GDG ? utility used to create GDG?


           

1 Answers



 
answered By Mswami   0  

Generation Data Group is a group of chronologically or functionally related datasets. GDGs are processed periodically, often by adding a new generation, retaining previous generations, and sometimes discarding the oldest generation.

It is a dataset with versions that can be referenced absolutely or relatively. It is defined by an IDCAMS utility.

If we use GDG, It will take care following things:

  • It will maintain all generation of data sets
  • It will delete/uncatalog older generation
  • Very easily, we can refer current and older versions of data sets
  • No need of change the JCL every time when we submit.
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