topic Power Utilization Calculations in HPE OneView

Power Utilization Calculations

schwengels — Thu, 10 Oct 2024 13:40:43 GMT

Hello,

I have OneView 8.90 and while adding servers to a rack in the facilites section I am getting a warning that the rack is overloaded from a power standpoint. Looking into this, the server shows a total power capacity of 2kW. The server has dual redundant 1kW power supplies. The capacity of the server power should only show 1kW to account for a power supply failure. The issue is; the rack utilization adds up the 2kW as potential power usage, so you would only be able to get a few servers into a rack without the rack reporting potential over power condition.

The request would be to have a future version calculate power based on power supply settings; redundant or stand-alone, to represent potential power capacity/allocation more accurately. Or use actual readings from iLO. I have a rack with 20 servers in it and Oneview thinks the potential power allocation is 52kW based on how it currently calculates this, which is not even close to reality.

I would be glad to share more information about what I am seeing.

Thank you!

Re: Power Utilization Calculations

Rama2 — Wed, 09 Oct 2024 13:02:14 GMT

Power management involves three key aspects:

Utilization Power (Power Advisor): This is an estimated average power usage based on a modeled configuration running typical datacenter applications. It helps understand energy consumption and size PDUs and circuit breakers, but it is only an estimate and actual usage can vary significantly.
Allocated Power: The Frame Link Module tracks available power and allocates it based on the maximum potential usage of compute, interconnect, storage, and management modules. Allocated power accounts for the actual hardware configuration and allows for changes without requiring reallocation. This power level is typically higher than Power Advisor's estimate.
Actual Used Power: This reflects the real power consumption, which can often be lower than both the estimated and allocated power. Variations depend on the utilization level of the hardware, with actual power usage potentially being significantly less than what is allocated, indicating that applications may not always drive the hardware to its maximum capacity.

HPE Synergy Power Management: https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00046945en_us
>Power supply configurations: https://support.hpe.com/hpesc/public/docDisplay?docId=c05348240en_us&docLocale=en_US&page=GUID-B30B18A0-B8D4-4B96-97B6-AABBFADEC246.html
>HPE Power Advisor: https://www.hpe.com/psnow/doc/4aa6-2925enw
https://poweradvisorext.it.hpe.com/?Page=Index

Query: Power Utilization Calculations

support_s — Mon, 14 Oct 2024 08:13:50 GMT

Hello,

Let us know if you were able to resolve the issue.

If you have no further query, and you are satisfied with the answer then kindly mark the topic as Solved so that it is helpful for all community members.

Please click on "Thumbs Up/Kudo" icon to give a "Kudo".

Thank you for being a HPE valuable community member.

Re: Power Utilization Calculations

schwengels — Mon, 21 Oct 2024 07:14:13 GMT

Hello @Rama2 ,

Thanks for replying. Unfortunately this is not related to Synergy. This is a stand alone OneView instance managing/monitoring rack mount servers - DL360, DL380 and Apollo servers. This reference is to DL servers with two 1600w power supplies and the power section for the rack takes this into account as showing potential 3.2kw, which is not accurate, as they are redundant and not accumulative. The request is to make this reflect actual or peak usage for calculating the rack power utilization. Let me know if you need more info.

Thank you.