How to create an empty GDG

samanthjain · New User Joined: 25 Jul 2008 Posts: 17 Location: Mumbai

Hi

I have a GDG base. I need to create first GDG version with the same attributes as the base. And the GDG version should be empty file.

Please help me which JCL utility will do this and how

expat · Posted: Fri Jul 25, 2008 6:49 pm

I am certain that you mean to say GENERATIONS rather than version. These are two very seperate entities and should not be mixed up.

What do you mean - with the same attributes as the base. The base is merely a catalog entry that holds information regarding the GDG as a whole, not its physical attributes such as RECFM or LRECL.

Use IEFBR14 to set up a null file with the correct RECFM & LRECL

samanthjain · New User Joined: 25 Jul 2008 Posts: 17 Location: Mumbai

So I can give the RECFM & LRECL as per my requirement.

Then can uoy please help me with the JCL.

expat · Posted: Fri Jul 25, 2008 7:07 pm

As it is a Friday, a lovely warm sunny day, and I am just about to depart to catch the Eurostar ........

samanthjain · New User Joined: 25 Jul 2008 Posts: 17 Location: Mumbai

Thanks a lot. . .

Gousiya Mulla · New User Joined: 02 Jun 2008 Posts: 87 Location: Bangalore

Douglas Wilder · Posted: Fri Jul 25, 2008 8:06 pm

In my experience, if you might read that empty generation and you use IEFBR14 to create it you should either add the MODLDSCB or DSORG=PS.

dick scherrer · Posted: Fri Jul 25, 2008 9:22 pm

Hello,

If your data is not sms-managed, you need ensure that a "real" end-of-file is written to the dataset (IEFBR14 does not write an eof).

If the data is sms-managed, this is not an issue.