How to get a generation number from a gdg in JCl

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

Hi

Iam creating multiple generations in a JCL. After creating one generation I need to know the generation number. Obviously for the first time it will be G0001.V00. For the 2nd and third time the generation number changes. In this case how to get the generation number in the same jcl.

If anyone knows please address my query.

murmohk1 · Posted: Mon Apr 23, 2007 5:34 pm

Velkumar,

expat · Posted: Mon Apr 23, 2007 5:36 pm

Why do you need to know the generation number. The ones that you create within your job can all be accessed by relative generation.

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

Hi

I will make my query more clear. For example the GDG created is A.B.C.G0001V00. I back up some data into that GDG by referring the current version in the JCL. We will refer in the JCL only by A.B.C(0) and not by A.B.C.G0001v00. To write it into the logfile I need the generaion number. If i write it with the Generation number, after some period, if i want to restore my data I can easily look into the logfile which generation number will contain my data.

Mainly for restoring purpose I need this information.

Hope the things make clear.

expat · Posted: Mon Apr 23, 2007 6:16 pm

If you really must do it this way, then I suggest that you read the job output via SDSF and then parse that data to extract what was backed up to which generation of a GDG, and then build or update your log file.

Easier option - use you ILM software, like HSM to create backups. That way you can interrogate HSM to see when a dataset was backed up, and there you go. If you speak niceley to your storage people they may even set up a specific MGMTCLAS in SMS to make sure that you do retain the required number of backups.

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

Hi Expat

Fine. But I cannot read the SDSF output. In the same job itself I need to get the info. Basically what I need is any Jcl commands available to get the generation number after the new version gets created.

expat · Posted: Mon Apr 23, 2007 6:24 pm

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

In one job 6 reports are created. Those 6 reports I had backed up in the version from 1 to 6 respectively in the same job. Those info I had to write in the logfile. If I look in the logfile and if i need to see the 5 th report, then in the logfile it should make an entry like A.B.C.G0005V00 for the 5th report.

Could you please explain moe clearly if you find answers

expat · Posted: Mon Apr 23, 2007 6:50 pm

Why not back all of the reports up to one version using ADRDSSU (Dfdss).

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

Hi

The reports requested are from different users. So we cannot put them in the same version. For one report one version needed. Thats the requirement

expat · Posted: Mon Apr 23, 2007 7:00 pm

To me this seems a badly thought out concept. As long as you know WHERE the report is backed up, what is the problem.

Have you considered different GDG names for different users ?

Velkumar · New User Joined: 23 Apr 2007 Posts: 18 Location: India

In the first step one report gets generated. That I had backed up in version 1 of the GDG. After completion of this step I need to write in the log file with the generation number(G0001V00). In the second step the second report gets generated. That I had backed up in version 2 of the GDG. After completion of this step I need to write in the log file with the generation number(G0002V00). Like wise it continues for more steps.. So one GDG name will be there but different versions for the different reports.

For Next day run the GDG base will be new. And the same process will follow.

expat · Posted: Mon Apr 23, 2007 7:36 pm

dick scherrer · Posted: Tue Apr 24, 2007 1:41 am

Hello,

It sounds as though a technical solution was decided on before the requirement was well defined. . .

If you would, please explain in a bit more detail just what needs to be available for recall. Please do not include "how" it might be done, just what is needed.

If i understand at all, what you want is being done many places (i.e. being able to retrieve something created previously) and it is not necessary to know dataset name/version in the job that creates it.