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Creating the base GDG

Before you can extract data in Generation Data Group (GDG) format for the first time, you must create a base GDG as a template. Use the following sample JCL to create a base GDG on each PAS from which you want to extract GDG data. This is a one-time procedure for each PAS.

Related topic

Extracting-historical-data

//SAMPGDG  JOB …
//DEFGDG   EXEC PGM=IDCAMS                        
//SYSPRINT  DD  SYSOUT=*                         
//SYSIN     DD  *                                
 DEFINE GDG(NAME(BMC.MVMVS.SYSA.HST0DS) -    
            LIMIT(255)                  -    
            NOEMPTY                     -    
            SCRATCH)                             
 DEFINE GDG(NAME(BMC.MVMVS.SYSA.HST1DS) -    
            LIMIT(255)                  -    
            NOEMPTY                     -    
            SCRATCH)                             
 DEFINE GDG(NAME(BMC.MVMVS.SYSA.HST2DS) -    
            LIMIT(255)                  -    
            NOEMPTY                     -    
            SCRATCH)                             
/*
Warning

Important

The value for the LIMIT parameter controls the number of generations to be retained. With the use of the EXTENDED parameter in IBM z/OS 2.2, you can retain up to 999 generations.


 

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