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Overview:
This enhancement only applies to Cray systems.
In order to improve the performance of PBS on very large scale systems (20 K+ compute nodes), a number of changes were made to reduce
the time and CPU cycles required for the reporting of the list of compute nodes and resources (inventory) by the collective set of pbs_mom daemons
running on the system. The specific changes were mostly internal to PBS with the exception of the addition of a new node attribute (vnode_pool)
used to associate the inventory reported by a singe pbs_mom as applying to all pbs_moms on the same Cray system.
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