Generation to be specifed in step2 eihter +1 or 0

premnath.mls · New User Joined: 16 Aug 2006 Posts: 9

hi ..

In step1 we are creating a genereation of a gdg .

In step2 the generation which is created in the step1 is used as input file............so what will be generation to be specifed in the step2 eihter +1 or 0..

this is an interview question..........

prashanth1 · New User Joined: 27 Sep 2006 Posts: 47 Location: Hyderabad

It should be +1

Pls Correct Me , If I wrong

raak · Posted: Thu Nov 02, 2006 12:43 pm

hi ,

it is +1, not 0...

i think this same question has been posted not long back.. it l be good if u search the forum before posting

UmeySan · Posted: Thu Nov 02, 2006 1:19 pm

Hi !

If you are running under JES2 it's +1. By running JES3 it's 0.
JES2 is cataloging Datasets at JobEnd and JES3 is cataloging Datasets at StepEnd.

Regards, UmeySan

prashanth1 · New User Joined: 27 Sep 2006 Posts: 47 Location: Hyderabad

Umey San,

pls let me know abt JES2 and JES3. I heard about JES2 and JES3 several times. But I dont know the significance of the same. It would be the great if you expalin about it.

UmeySan · Posted: Thu Nov 02, 2006 3:13 pm

@ prashanth1 !

Let's have a little excurse.

If you are submittling jcl you allway send control-card to a so called JobEntrySystem. So, a SubSystem that could interpret and handle these
cards with all there instructions. In a IBM-Environment it's JES2 or JES3, in Siemens-Enwironment it's BS2000 or BS3000.

What is JES2?

Job Entry Subsystem 2. One of two batch processing subsystems available for z/OS, both developed in the 1960s, and each with a different heritage, and different control statements (JECL). JES2 was originally HASP. Each reads batch jobs in, schedules their execution and spools their output. JES2 is, by far, the most popular, but JES3 is used in a much smaller number of very large organizations. An element of z/OS.

What is JES3

Job Entry Subsystem 3. One of two batch processing subsystems available for z/OS, both developed in the 1960s, and each with a different heritage, and different control statements (JECL). Each reads batch jobs in, schedules their execution and spools their output. JES2 is, by far, the most popular, but JES3 is used in a much smaller number of very large organizations. JES3 usage declined markedly during the 1990s as corporations merged their data centers as part of rationalizing an acquisition of another corporation. Although there were exceptions, JES2 tended to win if each data center used a different JESx. JES3 is an optional, separately priced feature of z/OS.

Operater-Interactiv-Comunication with mainframe Z/OS is also using
so called JES-Commands. For example start and stop MVS-Regions and Partions, releasing Jobs, setting Spool-Parameters an so on.

Beside the JES-Comands, you also have pure MVS-Commands.

But I think all other achievements here, will take too much time.

For learning more about this, please have a look at IBM Bookmanager.

Thanks for listening & Regards, Umeysan

prashanth1 · New User Joined: 27 Sep 2006 Posts: 47 Location: Hyderabad

too gud

star_dhruv2000 · Posted: Mon Nov 06, 2006 3:33 pm

well nothing like that jes2 or jes3 dosent make diff since the current generation not become the current genration till the job end. So u need to use it as +1 only. I tried it on both.

UmeySan · Posted: Mon Nov 06, 2006 4:45 pm

Hi star_dhruv2000 !

Sorry, I don't agree. JES3 is cataloging at StepEnd.
You wrote: I tried it on both

Are you shure, you'r running JES2 and JES3 on your machine.

So I, for my person, spending whole life on IBM programming, will take every chance to update my precognition.
So could you please believably establish that point to an old
IBM SystemProgrammer.

Regards, UmeySan

star_dhruv2000 · Posted: Tue Nov 07, 2006 9:24 am

Well bro I work on jes2 and one of my fren told me this abt jes3. If u are so sure about the fact then I think I need to update my glossary and make it sure once again. Thanks