IBM Power Ideas Portal


This portal is to open public enhancement requests against IBM Power Systems products, including IBM i. 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).


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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.

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Status Submitted
Workspace AIX
Created by Guest
Created on Nov 1, 2024

RELATED IDEAS

Backport PCM FPIN congestion mechanism to AIX 7.2

We have noticed that in an environments with FPIN notifications enabled and high read rates and a larger storage throughput capacity that host ingestion capacity, the behaviour of AIX 7.3 and AIX 7.2 are quite different, leading in AIX 7.2 to scenarios where the path selection policy may lead to IO requests egressing only via one interface as the other paths are marked as LCn and eventually lose the Selected status.

The mechanism in AIX 7.3 of reducing the requests (https://www.ibm.com/support/pages/fpin-els-displaying-congestion-statistics-mpio-device-paths-managed-aix-73-default-pcm) does not lead to the same critical impact.

This Rfe would be for backporting the FPIN congestion support and behaviour improvements in lsmpio and the PCM from AIX 7.3 to AIX 7.2 

Idea priority Medium

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