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TRUE exit to a trigger a Job from CICS

 
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SanthoshN

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Joined: 13 Nov 2009
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Location: Chennai

PostPosted: Wed Sep 01, 2010 11:45 am    Post subject: TRUE exit to a trigger a Job from CICS
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My requirement is to simulate an existing online system in CICS.

I have some set of online messages which will be run in CICS as transactions. In the present system, the output of the functional messages are written into GDG's which do not pre exist and written to +1 version.

We have decided an approach that our ASM-CICS programs will write to ESDS files and at the end of the transaction a batch job will be triggered to create +1 GDG's, copy the VSAM to GDG's.

Decided to use TRUE exit routines where at the end of the transaction, we will trigger a TRUE exit program which will have CICS SPOOLWRITE instructions to create and submit the job.

Just wanted to know if the above approach is feasible. Went through the references of TRUE EXITS and was not able to find that much help from the web. Any inputs will be of great help as we might be overlooking something.
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Bill O'Boyle

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Joined: 14 Jan 2008
Posts: 2502
Location: Atlanta, Georgia, USA

PostPosted: Wed Sep 01, 2010 4:56 pm    Post subject: Reply to: TRUE exit to a trigger a Job from CICS
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The following post was along those same lines.

You may want to send a PM to the original poster and ask if there was a viable solution.

IMHO, this is probably not the best idea and I'd suggest an alternative, but that's up to you.

http://ibmmainframes.com/viewtopic.php?p=245549&highlight=#245549

Bill
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SanthoshN

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PostPosted: Wed Sep 01, 2010 4:59 pm    Post subject:
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Thanks for the help!
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dick scherrer

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Joined: 23 Nov 2006
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PostPosted: Wed Sep 01, 2010 8:22 pm    Post subject:
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Hello,

Quote:
Went through the references of TRUE EXITS and was not able to find that much help from the web. Any inputs will be of great help as we might be overlooking something.
There is a reason for this. . .

As Bill suggests, an alternative will probably be better. Why introduce something that your group is not knowledgable about and about which little material can be found.
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SanthoshN

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PostPosted: Tue Sep 21, 2010 12:40 pm    Post subject:
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Thanks for the help!!

I was not able to get that much input from the member as redirected by Bill. On a related note,

Can you tell me if it is optimal to keep (sequential) files in my target systems as queues.? I need to handle my PS files in CICS targt system .
These files are always used in seq access only.

a) Use them as Xtra Partition TDQ's in CICS and use READQ and WRITEQ since my use is always seq only
b) USe ESDS VSAM's and copy them to PS files by triggering a Job

The biggest concern here is the performance. Not able to find any description of the performance of doing I/o operations on CICS queues Vs Files.

Any help on this point alone will be of great use.
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dick scherrer

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PostPosted: Tue Sep 21, 2010 7:08 pm    Post subject:
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Hello,

CICS was not intended to process sequential files/data. . .

The more "batch" processing CICS is forced to do the worse the environment will perform and there will be more customer complaints.

Suggest the batch processes be run in batch and the results made available to the online environment. This can easily be accomplished by using vsam or database. . .
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SanthoshN

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PostPosted: Tue Sep 21, 2010 10:02 pm    Post subject:
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Thanks a lot !
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Earl Haigh

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Joined: 25 Jul 2006
Posts: 475

PostPosted: Wed Sep 22, 2010 3:11 am    Post subject:
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You might consider running your CICS applications from a batch program
and write results to a batch ESDS file.

www.batchcics.com icon_lol.gif
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