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IMS checkpoint issue/honor


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Banuchandar

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Joined: 02 Jun 2010
Posts: 4
Location: Chennai

PostPosted: Mon Feb 21, 2011 9:44 pm
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Hi All,

An application program which is accessing both IMS and DB2 is taking checkpoints for each record processing. Though the checkpoint call successful it s internally skipped by IMS and very few calls are honored. It s because the time frequency has been set within my data center.

Clarification required:
Many of the IMS checkpoint calls are skipped as the record process time within time frequency which has been set. If i control the checkpoint call from the application program to be issued only after certain number of records processed would i improve the process time and cost?

Besides, the checkpoint call is logically releasing the locks it seems (Somewhere i have read). Wouldn't be problem if i use this frequency checkpointing?

Regards,
B_G
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Sandy Zimmer

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Joined: 13 Jun 2007
Posts: 826
Location: Wilmington, DE

PostPosted: Mon Feb 21, 2011 10:10 pm
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There was an intensive discussion about this a couple of years ago. Did you search the forum?
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Banuchandar

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Joined: 02 Jun 2010
Posts: 4
Location: Chennai

PostPosted: Tue Feb 22, 2011 5:02 pm
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Hi Sandy,

I could not find the exact thread you are trying to point icon_sad.gif But anyway, thanks for your updates.

Regards,
B_G
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Sandy Zimmer

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Joined: 13 Jun 2007
Posts: 826
Location: Wilmington, DE

PostPosted: Tue Feb 22, 2011 11:48 pm
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Try this - much knowledge and especially check out Anuj's post with all of the links to prior discussions.

ibmmainframes.com/viewtopic.php?t=37301&highlight=checkpoint+restart+timing
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Sandy Zimmer

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Joined: 13 Jun 2007
Posts: 826
Location: Wilmington, DE

PostPosted: Wed Feb 23, 2011 4:53 am
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One more thing.......think about WHEN you are running this job. And, you will find discussions in the links. If your databases are small and the job runs very quickly, consider just using backup/restore procedures. You didn't share the size of your database and when your job runs? Checkpoint/restart and frequency is only viable depending on your environment.
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Anuj Dhawan

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Joined: 22 Apr 2006
Posts: 6250
Location: Mumbai, India

PostPosted: Wed Mar 02, 2011 2:28 pm
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This is also a good point to start with: Click.
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