IDMS - commit logic

Meenakshi Selvaraj · New User Joined: 30 Oct 2009 Posts: 36 Location: Chennai

Hi,

In IDMS Commit we have logic for Auto-restart. For Local mode, how we can restart?

Chinnadu · New User Joined: 05 Mar 2009 Posts: 46 Location: Hyderabad

Hi Meenakshi,

Confused with your question,,, can you please let us know how the restart logic has been coded ? We can better understand the problem if you let us know this one.

Meenakshi Selvaraj · New User Joined: 30 Oct 2009 Posts: 36 Location: Chennai

Hi,

In general, an application runs faster when run in local mode, but IDMS/R provides no automatic restart and recovery facilities for local mode applications.

I heard that using journal files, we can restart manually an aborted run unit even applications run in local mode.

I want to confirm the above logic. Kindly let me if we have some other option to acheive the restart logic in Local mode.

dick scherrer · Posted: Wed Nov 04, 2009 9:44 am

Hello,

Is this still an issue if the idms environment is to be discontinued?

Have you talked with the idms dba? If not, suggest it is past time. . .

Chinnadu · New User Joined: 05 Mar 2009 Posts: 46 Location: Hyderabad

Hello,

What dicK said was correct,, in addition to that let me add some comments on IDMS local mode functionality.

If a step is running in local mode,,, there must be some step prior to that local mode step to vary off the areas so that remaining transactions can access the database only in retrieval mode. If the local mode job abends then based on the condition codes you can do rollback using journal files in the immediate step. Below sequence gives you an idea on how to handle thiis kind of request.

STEPX: EXEC PGM=IDMSVARY --------> VARY THE AREAS IN RTRIEVAL MODE

STEPY: EXEC PGM=LOCALMODEPROGRAM

IF STEPY.ABEND=TRUE THEN -------> ROLL BACK STEP
STEPZ EXEC PMG=ROLLBACK PROCESS
END-IF

In setting up STEPX and STEPZ your DBA can help you.

Make sure that once the local mode job is over, you need to put the database online so that remaining transaction can update the database.

In case of abend even after restoring the database using stepz, once again if you want to restart the job you need to restart from stepx not from stepy(This is very very improtant).

let me know if you have any queries.