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How to change the JOB class, when the job is running inspool


IBM Mainframe Forums -> JCL & VSAM
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Anuj Dhawan

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Joined: 22 Apr 2006
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Location: Mumbai, India

PostPosted: Tue Aug 12, 2008 6:02 pm
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Robert Sample wrote:
Different application, different meaning.
Yeah agreed and thread specifically talks about SDSF since start, unless I'm missing soething, so "H" could have worked...not sure if TS has tried it..
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Robert Sample

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Joined: 06 Jun 2008
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Location: Dubuque, Iowa, USA

PostPosted: Tue Aug 12, 2008 6:04 pm
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sushanth bobby:
Quote:
So you are saying that i can the MSGCLASS. Just for informational purpose can you tell how to do that.
Actually, I can't tell you because the only spool management package I've got access to is (E)JES and the commands are different for each package.

Also, there's a manual on Workload Manager in the MVS bookshelf. It tells a lot about how WLM works. Basically, WLM doesn't care about individual job classes; it works with service classes. Multiple job classes can be rolled into a single service class. WLM is concerned with started tasks, CICS regions, batch jobs, TSO users, OMVS processes, and so forth -- in other words it manages the ENTIRE workload of the system. WLM has assigned goals for each service class and it attempts to meet these goals (for example, a service class goal might be to run for 25% of the CPU while it's running; or perhaps complete 90% of TSO commands in 2 minutes) by adjusting workload priorities.
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Anuj Dhawan

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PostPosted: Tue Aug 12, 2008 6:10 pm
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expat wrote:
icon_redface.gif Stop it, you are making me blush icon_lol.gif
Nah..I'll not, You and many more are there in this Forum..who I respect a lot.

I remember when once I asked Frank, "how do you know this much about ICETOOL & DFSORT"..

his answer was.."I've invented the ICETOOL"..

I remember.. that whole week I was not able to sleep because of excess excitement inside my blood... I still feel that.. icon_smile.gif

Once again, Thanks for being here..
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sushanth bobby

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PostPosted: Tue Aug 12, 2008 6:24 pm
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Thank You Very Much Robert.
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Bill Dennis

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Joined: 17 Aug 2007
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Location: Iowa, USA

PostPosted: Tue Aug 12, 2008 6:52 pm
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sushanth bobby,

this thread went in many directions. are your questions answered?

If permitted by SDSF security, for submitted jobs you can:
1. change JOBCLASS only before execution begins
2. change MSGCLASS (sysout class of output on spool) only after execution completes
3. change WLM service class during execution to adjust performance
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sushanth bobby

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PostPosted: Tue Aug 12, 2008 7:11 pm
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Dennis,

Doubts have been answered.
1. Can't change the JOBCLASS when the job is running.
Quote:
change JOBCLASS only before execution begins
Are you talking about the INPUT (I) QUEUE in SDSF.

2.Informational Purpose
Quote:
change MSGCLASS (sysout class of output on spool) only after execution completes
Only after the execution completes, what are the things that can be done.

3.
Quote:
Change WLM service class during execution to adjust performance
Performance of the JOBs running or MAINFRAME. In WLM, the limit of a particular class CPU time can it be changed.
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Bill Dennis

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PostPosted: Wed Aug 13, 2008 12:13 am
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1. Yes, I mean change JOBCLASS on SDSF Input Queue display.

2. The Output and HeldQ displays allow for changing CLASS of the spooled output.

3. The WLM performance characteristics of a job are different from the maximum CPU time limitations that may be imposed on jobs in a certain JOBCLASS. The CPU time maximum limit per step set by the JES JOBCLASS cannot be changed or overridden. How often your job gets to use the CPU (priority) is based on WLM service policies. An executing job may be assigned to a higher performing service class. if you're allowed.
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Anuj Dhawan

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PostPosted: Wed Aug 13, 2008 11:24 am
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Hi,
Bill Dennis wrote:
2. The Output and HeldQ displays allow for changing CLASS of the spooled output.
This was my first thought about this thread..probably my explanation skills were scattered somewhere when I answered in this thread .. icon_redface.gif
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