You need to see if the JCL that creates the JCL have things like

RETPD=
EXPDT=

For GDGs, you also need to list the BASE GDG and see if it has NOSCRATCH OR 
NOEMPTY or SCRATCH or EMPTY

Normally a GDG is created with EXPDT=99000 which is Catalog control.  Then when 
the +1 generation is created, if the Limit is reached, then the oldest version 
will drop off if the GDG is defined with Scratch NOEMPTY.

A Limit of 14 means keep 14 versions.  If you create 14 in one day, then it 
will cycle very quickly.  If you create a GDG once per week it will last for 14 
weeks.  This will depend on the frequency of the creation of the GDG.  

A search on the IBM Website for GDG CREATION provides this link.  It should be 
helpful

https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.ieab500/iea3b5_Generation_data_sets_.htm



Check with your storage Admins for assistance.

Lizette


> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Nathan Astle
> Sent: Thursday, May 19, 2016 2:33 AM
> To: [email protected]
> Subject: GDG retention
> 
> Hello,
> 
> We have some GDG getting created during the SMF processing. Is there a way to
> determine its retention ?
> 
> I see the value for GDG as LIM 14. Does that mean the retention would be 14
> days ?
> 
> Nathan

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