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IMS DB - backed out issue!!

 
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Anand Syril

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Joined: 28 Dec 2005
Posts: 13

PostPosted: Tue Apr 07, 2009 11:57 pm    Post subject: IMS DB - backed out issue!!
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Hi,
I have the following scenario:
Program A Calls ---> Program B Calls-->Program C then
-------------------------Program B calls ---> Program D.

Program A is invoked by an IMS transaction A.

While testing in XPED, whenever there were some issues in program D and the program terminates, the DB(includes IMS and DB2 databases) changes till the call to D was made, got retained.
But, while testing outside XPED(as in, a real time scenario), when there are some issues in D all the DB changes made till then(including programs A , B and C) gets backed out.

Since this being a MPP transaction (transaction A) invoked program, I did not introduce any CHKPOINT within the programs.
<<My understanding was that, a MPP transaction COMMITS the changes after every call to a program.>>

Kindly let me know what needs to be done, if I want to retain the DB changes. (is there any way by which this can be done without using CHKPOINT).
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dominickim

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Joined: 28 Feb 2007
Posts: 65
Location: NS, CA

PostPosted: Wed Apr 08, 2009 3:40 pm    Post subject: Correct me if I am wrong.
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My understanding is that, a MPP transaction COMMITS the changes when meet another GU message call/GOBACK/CHKP call. In my opinion, program B, C and D are considering as part of processing one message for original transaction A. XPED runs with generated online environment with your TSO ID which is not real online environment - I would consider it is batch environment.
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