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koolspark · Beginner Joined: 27 May 2010 Posts: 29 Topics: 13

hi,

I've a GDG with limit 30. I'm creating a new generation daily(one generation on each working day) and at the end of the month, I am concatenating all these daily generations and writing to a new generation of another(monthly) GDG. My problem is, since working days in a month are not fixed, I may get 20-25 generations in a month. But, I should not copy/concatenate previous months generations. Please advise.

Thanks,

expat · Posted: Tue Jul 06, 2010 5:05 am Post subject:

What I usually do is to use the GDG base name as input
This will select all existing generations for the copy process.

The next step, conditionally executed will delete all existing generations.

The final step will use IEBGENER to create an empty +1 generation to ensure that at least one generation exists for the next accumulation process.
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Anuj Dhawan · Posted: Tue Jul 06, 2010 5:10 am Post subject: Re: GDG concatenation issue

kolusu · Posted: Tue Jul 06, 2010 10:30 am Post subject:

koolspark,

Ideally your scheduling software ( CA- 7 or Jobtrac or Control-M) should handle this without any problem. You would have a daily job which creates the GDG generations and a Month-end job which would read all the GDG and copy them to a new file and delete all the existing daily generations.

If you don't have a scheduling software, then you can do listcat on the GDG base and generate a dynamic JCL which would only pick the current month generations and submit the job via intrdr.

Look at the smart DFSORT trick "Copy GDGs created today" here

http://www.ibm.com/support/docview.wss?rs=114&uid=isg3T700009

You need to slightly change it to use DATE2 which is of YYYYMM format. If you need help for this approach let me know I will code it up for you.
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