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Status Not under consideration
Workspace IMS Transaction Manager
Categories General TM
Created by Guest
Created on Jan 26, 2024

RELATED IDEAS

Lock Manager incompatibility between PI and IRLM

We are implementing IMSPLEX configuration for a customer (see diagram attached). Currently we have IMSP instance running on MVS2 LPAR and we are going to add IMSO (IMSP clone) into another new LPAR, using Shared Databases and Shared Queue. See details in teh attached presentation. The current IMSP is still using Program Isolation (PI) and we know the first step to IMSP participate in a IMSPLEX configuration is to migrate to IRLM.

Before migrating IMSP to IRLM, we brought IMSO up on MVS4 with no workload (No BMPs, No MPPs) to fix and improve any wrong parameter in the IMSO. IMSO is using already the IRLM. 

After few days alive, one of the IMS database online reorganization jobs issued a /STA DB command for some databases and the databases became unavailable for IMSP and IMSO (DFS047A unauthorized). see details in the attached word. We took a while to realize the issue was caused by PI-IRLM compatibility since the messages are not clear. Meantime, the production environment was unavailable for the users.

My suggestion is to create a clear message for PI-IRLM incompatibility for the futures sites still using PI and migrating to IMSPLEX with database sharing. 

Delta Airlines ...
IBM case TS0152...
Delta Airlines - PI-IRLM issue.pptx
 Delta Airlines - PI-IRLM issue.pptx
Open full size
IBM case TS015282569 PI-IRLM.docx
 IBM case TS015282569 PI-IRLM.docx
Open full size
Delta Airlines - PI-IRLM issue.pptx IBM case TS015282569 PI-IRLM.docx
Idea priority Low
  • Admin
    Carol Degrace
    Reply
    |     Jun 18, 2024

    Unfortunately, we are going to reject this idea because we believe a doc change is sufficient for this and as mentioned in the Case, a doc change has been submitted as follows:

    In the 'Programmer Response' section from the section of the IMS manuals that explain the DFS047A message, which can be found here -

    https://www.ibm.com/docs/en/ims/15.3.0?topic=dfs050a-dfs047a

    The following text will be added:

    >>> - The incompatibility between the requested state and the current authorization state

    may be caused by the use of different Lock Managers (PI vs IRLM) when accessing

    the same database from different IMS subsystems. For more information, see https://www.ibm.com/docs/en/ims/15.4.0?topic=requirements-data-sharing-software.

    (RC 01) <<<

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