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How do You Regulate Power on Your Integrity NonStop BladeSystem?

In an earlier blog (Power Monitoring and Regulation for NonStop: Going Green BIG TIME), I discussed many areas related to power management on Integrity NonStop systems, including power monitoring, thermal monitoring, data center power control, CPU utilization monitoring, and Power Regulator. In this blog, I will discuss how to use Power Regulator on Integrity NonStop BladeSystems.

 

First, what is Power Regulator? Power Regulator is a mechanism so that the blades in a NonStop BladeSystem can be run in different power efficiency modes based on customer-specific workloads, and thus, reduce data center power and cooling costs.

 

Power Regulator on NonStop BladeSystems

 

The Power Regulator feature is only available for Integrity NonStop BladeSystems NB54000c and NB54000c-cg running RVU J06.14 or later, and OSM SPR T0682ACZ or later. There are three supported Power Regulator settings:

  • HP Static High Performance Mode: In this mode, all CPUs run at the maximum performance/power consumption that is supported by your NonStop configuration. This mode ensures maximum performance, but does not provide any power savings. This is the default mode for all systems, including all systems that had already been shipped when Power Regulator was introduced.
  • HP Dynamic Power Savings Mode: In this mode, all IPUs run at maximum power/performance until an IPU idles. Once the IPU idles (and as long as it does not need to off-load work from other IPUs), it moves to the Itanium power saving state until a task needs to run on it, at which time the IPU executes instructions at maximum power/performance again.
  • HP Static Low Power Mode: In this mode, the CPU is set to a lower power state. This state saves
    power by having the CPU operate at a lower frequency, with resulting lower performance capacity. The performance impact is workload-dependent.

 

The first time you enable Power Regulator for a CPU, its default Power Regulator setting changes from HP Static High Performance mode to HP Dynamic Power Savings mode. You need to then issue a command in HP Insight Control Power Management (delivered on HP Insight Control for NonStop) to alter the Power Regulator setting, if desired. iLO stores the new Power regulator setting in iLO flash memory, and that new Power Regulator setting becomes the default.

 

OSM support of Power Regulator

The tool to enable/disable blade Power Regulator is OSM Service Connection. It provides the action Enable/Disable Blade Power Regulator Management on the System object. In addition, the following two attributes under the System Object relate to Power Regulator.

  • Power Regulator Management Supported: It has the value True on a NonStop BladeSystem NB54000c or NB54000c-cg running an RVU supporting power management. Otherwise, this attribute is not displayed.
  • Power Regulator Management Status: It is only reported on NonStop BladeSystems if Power Regulator Management Supported is displayed (and has a value True). It can have one of the following values:
    • Disabled, when OSM action Enable/Disable Blade Power Regulator Management has attempted to disable power management on all blades or if the RVU does not support Power Regulator.
    • Enabled, when OSM action Enable/Disable Blade Power Regulator Management has successfully enabled Power Regulator on all blades.

 

How to enable Power Regulator

  • If the desired Power Regulator setting is HP Static High Performance Mode (which is the default), you have to do nothing.
  • If the desired Power Regulator setting is HP Dynamic Power Savings Mode or HP Static Low Power Mode, use the OSM Service Connection action Enable/Disable Blade Power Regulator Management to enable Power Regulator.
    • If the desired Power Regulator setting is HP Dynamic Power Savings Mode, you are done at this point.
    • If the desired Power Regulator setting is HP Static Low Power Mode, immediately after enabling Power Regulator, use HP Insight Control Power Management to alter the Power Regulator setting for all blades in this NonStop BladeSystem.

 

If Power Regulator is enabled, ensure that all blades in the NonStop BladeSystem are set to the same Power Regulator setting. OSM creates a non-dial-out alarm if it detects that all blades in the system are not set to the same Power Regulator setting.

 

Happy regulating power on NonStop BladeSystems….

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About the Author
Vinay Gupta is an HP Distinguished Technologist and the NonStop Manageability Architect. He joined Tandem in 1994 after graduating from Indi...


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