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The behavior of PBS will be changed to create, by default, a vnode per compute node as reported in the ALPS inventory.

This feature depends on the ALPS inventory response, therefore PBS must be able to communicate with ALPS (i.e. $alps_client must be set to the path to apbasil).Please note, this feature is available when PBS is build with configure --enable-alps.
Most feature support specific to Cray is only available when PBS is built with configure --enable-alps.  
 

New Interface: vnode_per_numa_node

• Visibility: PBS Private
• Change Control: Experimental
• Details:
  • New interface: new mom_priv/config variable.
  • Creates PBS vnodes based on the information provided by ALPS.
    • If there is no information to use, then this feature has no effect.
  • vnode_per_numa_node is a Boolean. 
    Setting it to FALSE will cause PBS to create one vnode per Cray compute node reported via ALPS.  This is the default behavior
    when $vnode_per_numa_node is not set in mom_priv/config.
    Setting it to TRUE will cause PBS to create one vnode per Cray NUMA node reported via ALPS.
  • the value of vnode_per_numa_node should be set to the same value on all of the PBS moms for that Cray host.
    
    

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