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Status Future consideration
Workspace z/OS
Categories JES2
Created by Guest
Created on Nov 11, 2022

RELATED IDEAS

Allow the number of JES2 NODES to be reduced without a cold start

We have a number of JES2 environments which have evolved over time. Decades ago, someone decided that it would be useful to define the NODENUM on the NJEDEF init parm as 9999, meaning we now have many systems defined with 9999 possible nodes. We actually only need 49 today.


The manual states that it's possible to increase the NODENUM parameter with a warm start, but to decrease it requires a cold start. As several of these JES2 environments are MAS environments in production, it is not feasible to perform a cold start without severe disruption (and the potential of bringing unexpected parameters into action - see idea ZOS-I-3480).


I would like a way to reduce the number of defined nodes, either via a warm start or an operator command.


This would also reduce the CPU required by some tools that scan all nodes to see if they are active or not - and I would think reducing the node numbers would free up storage used by JES2.

Idea priority High

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