IBM Z Software


This portal is to open public enhancement requests against IBM Z Software products. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (https://ideas.ibm.com).


Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:

Search existing ideas

Start by searching and reviewing ideas and requests to enhance a product or service. Take a look at ideas others have posted, and add a comment, vote, or subscribe to updates on them if they matter to you. If you can't find what you are looking for,

Post your ideas

  1. Post an idea.

  2. Get feedback from the IBM team and other customers to refine your idea.

  3. Follow the idea through the IBM Ideas process.


Specific links you will want to bookmark for future use

Welcome to the IBM Ideas Portal (https://www.ibm.com/ideas) - Use this site to find out additional information and details about the IBM Ideas process and statuses.

IBM Unified Ideas Portal (https://ideas.ibm.com) - Use this site to view all of your ideas, create new ideas for any IBM product, or search for ideas across all of IBM.

ideasibm@us.ibm.com - Use this email to suggest enhancements to the Ideas process or request help from IBM for submitting your Ideas.

Add a new idea Subscribe
Status Not under consideration
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on Dec 18, 2019

RELATED IDEAS

Update CICS Command REWRITE as THREADSAFE for shared data table, coupling facility data table

CICS Command REWRITE as THREADSAFE for shared data table and coupling facility data table

Idea priority High
  • Guest
    Reply
    |     Oct 5, 2023
    CICS Development: We have no plans to make commands that update Shared Data Tables threadsafe. We do have plans to provide threadsafe access for reads and browses to shared Data Tables. See https://bigblue.aha.io/ideas/ideas/CICSTS-I-1189
  • Guest
    Reply
    |     Jan 8, 2020

    This is a candidate for a future release

  • Guest
    Reply
    |     Dec 20, 2019

    Access to coupling facility Data Tables (CFDTs) for all commands was made threadsafe in CICS TS 5.5. This is not an item that can be backported to earlier releases because the layout of the File Control table entry changed significantly and making such a change via apar would break ISV products.

    It is not possible to make just the REWRITE command threadsafe for shared data tables. To maintain data integrity all commands would have to be threadsafe. We have been asked for threadsafe SDT access via other RFEs and those have been declined. The design of SDT exploits the serialisation provided by QR TCB to optimise the data access and so provide the performance. Providing multi TCB access would require a significant, if not total, rewrite and most probably would perform worse.

By clicking the "Post Comment" or "Submit Idea" button, you are agreeing to the IBM Ideas Portal Terms of Use.
Do not place IBM confidential, company confidential, or personal information into any field.