Multiple GDG versions to a single file (FIFO layout)

ouintonfloury · Posted: Fri Sep 13, 2013 8:45 pm

Hi,

I have a requirement where I need to include only the gdg base name and then copy all the versions to a sequential file but the file needs to be copied from the oldest generation to the latest generation which means the layout should be in FIFO layout. Is there any possibility where can do this process.

Thanks,
Meenakshi

Akatsukami · Posted: Fri Sep 13, 2013 8:57 pm

Of course. If this will be a repeated task, you have to determine what generations there are using IDCAMS or a similar tool, then fabricate and submit JCL using that information. If a one-time task, you will likely be better off perform those step by hand.

Bill Woodger · Posted: Fri Sep 13, 2013 10:39 pm

Isn't FIFO, oldest generation first, simply what you want? What problem are you havin?

Nic Clouston · Posted: Sat Sep 14, 2013 12:39 am

First problem - he wants versions not generations

Akatsukami · Posted: Sat Sep 14, 2013 12:51 am

ouintonfloury · Posted: Sat Sep 14, 2013 2:29 pm

Sorry to confuse you people, basically I want the GDG generations to be copied into a sequential file with the oldest generation getting copied first and then the latest. If I use sort or IEBCOPY, the latest generation is copied first and then the oldest. I need to copy these files on a daily basis ... Can we do that

Bill Woodger · Posted: Sat Sep 14, 2013 3:47 pm

Can you demonstrate that please?

Robert Sample · Posted: Sat Sep 14, 2013 7:01 pm

Will there be a fixed number of generations to copy each day? If so, just write the JCL to copy the concatenated generations, oldest first, to your output data set.

If the number of generations can vary by day, then you will need to write a program in the language of your choice. Your daily job will consist of an IDCAMS step to list the generations; followed by executing the program which will parse the LISTCAT output and pull out the generations that exist. The program output will be the JCL you want to execute (again with the concatenated generations to be copied) and can be sent directly to the internal reader.

expat · Posted: Mon Sep 16, 2013 2:14 pm

CSI will list them in the correct order.

Look at SYS1.SAMPLIB(IGGCSIRX)