PP-586: Ability to choose whether a vnode is created per segment or per compute node.

PP-586 - Getting issue details... STATUS

Interface: alps_create_vnode_per_numa

• Visibility: Public
• Change Control: Experimental
• Details:
  • alps_create_vnode_per_numa is a Boolean. Setting it to "TRUE" will cause PBS to create one vnode per Cray numa node. This is the 
    default behavior when alps_create_vnode_per_numa is not set in mom_priv/config. Setting it to "FALSE" will cause PBS to create
    one vnode per Cray compute node.
  • Naming convention of the vnodes will follow what was stated in SP16543 EDD, without the segment.
  • New interface: new mom_priv configure variable.
  • NOTE: when alps_create_vnode_per_numa is set to "FALSE", it will not be possible for PBS to schedule based on segments.

Administrator's instructions.

• When changing from using one type of vnode create versus another, you must first:
  
  • Quiesce the system.
  • Remove all existing vnodes of the vntype cray_compute. The easiest way to do this is to delete all vnodes using 
    • qmgr -c "delete node @default"
  • Set the mom_priv configuration variable to desired setting in each MoM.
  • HUP the MoM.
  • Add the MoMs back using qmgr: qmgr -c "create node <mom name>"

Definition of technical terms, spelling out acronyms and abbreviations.