18.4 Miscellaneous Power Management Options

• 18.4.1 Maximizing Scheduling Efficiency
• 18.4.2 Logging Power-Related Events
• 18.4.3 Enabling and Disabling Power Management for All Nodes

18.4.1 Maximizing Scheduling Efficiency

To facilitate more efficient scheduling, it is a good idea to specify the maximum amount of time a power on or power off action takes to complete.

PARCFG[torque]     NODEPOWERONDURATION=2:00
PARCFG[torque]     NODEPOWEROFFDURATION=2:00

With the NODEIDLEPOWERTHRESHOLD parameter, Moab can turn nodes off after they've been idle for a specific amount of seconds. The default value is 60 seconds.

NODEIDLEPOWERTHRESHOLD 600

18.4.2 Logging Power-Related Events

Power actions are considered NODEMODIFY events that are not, by default, recorded. Adding the following line to your configuration file enables recording power-related actions in the events file.

RECORDEVENTLIST +NODEMODIFY

18.4.3 Enabling and Disabling Power Management for All Nodes

You can enable or disable green power management for all nodes while Moab runs by using the changeparam command. For example:

To enable green power management: changeparam NODECFG[DEFAULT] POWERPOLICY=OnDemand
To disable green power management: changeparam NODECFG[DEFAULT] POWERPOLICY=STATIC

The default POWERPOLICY setting is STATIC.

NODECFG[DEFAULT]   POWERPOLICY=OnDemand