Andi wrote:

e.g. job runs threads on nodes 0,1,2,3  and you want it to move
to nodes 4,5,6,7 with all memory staying staying in the same
distance from the new CPUs as it were from the old CPUs, right? 

It explains why you want old_node, you would do 
(assuming node mask arguments) 

Yup - my immediately preceeding post repeated this - sorry.

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