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southskies · Beginner Joined: 14 Jul 2008 Posts: 9 Topics: 4

Hi,

I am needing to collect details about the total exception count from all the preceeding steps of an executing job.

Running SDSF in batch (DA "screen") will only get the count of the current step. Running SDSF in batch (with the job selected) does not give accurate values for each step, as these values are are often suffixed by "K".

Based on some prior REXX STORAGE scripts....

(http://www.mvsforums.com/helpboards/viewtopic.php?p=58130&sid=00fb9bae0fb73239f686dd230ba53d17)

I've been looking through the MVS Data manuals to see whether this information is stored in memory, but it is not obvious where these values are stored.

Any ideas?

I want to collect this information which the job is still executing, not once the job has finished.

Many thanks!

Steve

expat · Posted: Wed Dec 21, 2011 5:53 am Post subject:

What is an exception count

Do you really mean the EXCP count, which indicates the number of EXecute Channel Program

Why would you need to know this for a subsequent job step.

Please explain fully what it is that you want to achieve and why
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southskies · Beginner Joined: 14 Jul 2008 Posts: 9 Topics: 4

Yes, correct ...the measure of amount of IO that has occurred during the execution of this step.
These details are also shown in the LOG of the job
"DSS3044 JOBNAME STEPNAME PROCSTEP RC EXCP CPU "

I wish to be able to collect the IO stats for an entire job so that a subsequent step can compare this value with past runs as part of a QA type integrity check exercise.

papadi · Supermod Joined: 20 Oct 2009 Posts: 594 Topics: 1

Hello,

Suggest you talk with your system support people and learn what SMF reporting and/or data extract processes are available on the system. Everything you want (and more) is stored in the SMF data and most organizations have analysis processes in place. These vary from site to site, so only someone familiar with your system would have a ready answer.
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All the best,

di

southskies · Beginner Joined: 14 Jul 2008 Posts: 9 Topics: 4

Hi,

I realise that the information is available within SMF, but a) the data is not available until after the job completes b) I was hoping to be able to access the data through the REXX STORAGE commands while the job is still running. You can access individual job steps RC and CPU time via direct access to STORAGE, and was hoping to get info from this forum on how to access EXCP IO counts using this method. It would be my expectation that MVS STORAGE would be the same across sites?

expat · Posted: Thu Dec 22, 2011 1:41 am Post subject:

EXCP counts are not a true indication of I/O activity.

An EXCP will typically read / write one block, although there may be exceptions to this which perhaps one of the sysprogs could explain.

The SMF data is probably the most accurate way to achieve the desired result. It may be possible for you to write a program to interrogate the SMF buffers for a job or step, but that I believe would be an extremely difficult and hazardous task to undertake.

If for some reason you get it wrong and mess up the SMF data, which may be used for financial accounting purposes, you may well kiss your job a fond farewell.
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If it's true that we are here to help others,
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papadi · Supermod Joined: 20 Oct 2009 Posts: 594 Topics: 1