topic Re: Interval of measurement of power on the iLO 4 in Server Management - Remote Server Management

Interval of measurement of power on the iLO 4

lightSeeker — Tue, 27 Feb 2024 13:49:19 GMT

Hello,

I've used the Python "requests" library to interact with the iLO 4 (V2.76) and have successfully read PowerConsumedWatts. The full JSON response is shown at the end of this message.

The measurement window seems to be awfully long - 20 minutes by default, and no less than 1 minute, since "PowerControl[{item}].PowerMetrics.IntervalInMin " is an integer.

Can this be shortened to 1 second?

###JSON response

{'@odata.context': '/redfish/v1/$metadata#Chassis/Members/1/Power$entity', '@odata.id': '/redfish/v1/Chassis/1/Power/', '@odata.type': '#Power.1.0.1.Power', 'Id': 'Power', 'Name': 'PowerMetrics', 'Oem': {'Hp': {'@odata.type': '#HpPowerMetricsExt.1.2.0.HpPowerMetricsExt', 'SNMPPowerThresholdAlert': {'DurationInMin': 0, 'ThresholdWatts': 0, 'Trigger': 'Disabled'}, 'Type': 'HpPowerMetricsExt.1.2.0', 'links': {'FastPowerMeter': {'href': '/redfish/v1/Chassis/1/Power/FastPowerMeter/'}, 'FederatedGroupCapping': {'href': '/redfish/v1/Chassis/1/Power/FederatedGroupCapping/'}, 'PowerMeter': {'href': '/redfish/v1/Chassis/1/Power/PowerMeter/'}}}}, 'PowerAllocatedWatts': 135, 'PowerAvailableWatts': 365, 'PowerCapacityWatts': 500, 'PowerConsumedWatts': 53, 'PowerControl': [{'PowerAllocatedWatts': 135, 'PowerAvailableWatts': 365, 'PowerCapacityWatts': 500, 'PowerConsumedWatts': 53, 'PowerLimit': {'LimitInWatts': None}, 'PowerMetrics': {'AverageConsumedWatts': 52, 'IntervalInMin': 20, 'MaxConsumedWatts': 56, 'MinConsumedWatts': 52}, 'PowerRequestedWatts': 135}], 'PowerLimit': {'LimitInWatts': None}, 'PowerMetrics': {'AverageConsumedWatts': 52, 'IntervalInMin': 20, 'MaxConsumedWatts': 56, 'MinConsumedWatts': 52}, 'PowerRequestedWatts': 135, 'Type': 'PowerMetrics.0.11.0', 'links': {'self': {'href': '/redfish/v1/Chassis/1/Power/'}}}

Re: Interval of measurement of power on the iLO 4

TVVJ — Thu, 29 Feb 2024 06:43:19 GMT

Hello,

Please review the "RESTful Interface Tool 1.50 User Guide" and see if it helps.

Regards,

Re: Interval of measurement of power on the iLO 4

lightSeeker — Fri, 01 Mar 2024 05:23:50 GMT

@TVVJ Thank you, but no, it doesn't.

The HP RESTful API Data Model Reference for iLO 4 would be a more likely candidate, but it doesn't help.

Re: Interval of measurement of power on the iLO 4

lightSeeker — Thu, 29 Feb 2024 19:16:10 GMT

There is a resource at /redfish/v1/Chassis/1/Power/FastPowerMeter, of type HPPowerMeter.1.0.0.HPPowerMeter.

It shows 120 samples, which, if they are taken over the 20 minute interval, would equate to a 10-second interval between samples.

Indeed, the time stamp shows roughly 10 seconds between samples.

That's much better, but this resource is undocumented in the Data Model Reference.

Moreover, the sampling rates offered all seem to be fixed.

Re: Interval of measurement of power on the iLO 4

lightSeeker — Thu, 29 Feb 2024 21:36:44 GMT

Correction to previous message: type should have been HPPowerMeter.1.0.0.

Furthermore: the member that contains the data is "PowerDetail".

It contains 120 samples, formatted as follows:

{'AmbTemp': 20, 'Average': 51, 'Cap': 0, 'CpuAvgFreq': 0, 'CpuCapLim': 100, 'CpuMax': 0, 'CpuPwrSavLim': 100, 'CpuUtil': 0, 'Minimum': 51, 'Peak': 55, 'PrMode': 'dyn', 'PunCap': False, 'Time': '2024-02-29T21:05:49Z', 'UnachCap': False}

In the 10 seconds preceding 21:05:49, the average power was 51W.