Pue Data Center Efficiency Measurement

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CAse Study REPORT

PUE DATA CENTER EFFICIENCY MEASUREMENT

Introduction

One of the metrics used for measuring datacenter efficiency is Power Usage Effectiveness, or PUE. PUE compares the power consumption for the entire facility with the power consumed by the core IT components—servers, storage and network equipment. This ratio illustrates how effectively the power being consumed translates into net compute capacity. Mathematically, the calculation is straightforward:

For example, if one watt is being consumed by the servers and one watt is being consumed for the supporting cooling, power back up and other administrative use, the ratio would be 2.0—which is where most datacenters operate. The theoretical ideal PUE is 1.0, where the only energy consumed is for computation. The value of this metric is that it focuses on the non-value added use of power, which in a datacenter is anything that doesn’t compute or store information.

PUE = Total Facility Power/ IT Equipment Power

Below is an Example to calculate the PUE:

Having a facility that uses 100,000 kW of total power of which 80,000 kW is used to power your IT equipment, would generate a PUE of 1.25. The 100,000 kW of total facility power divided by the 80,000 kW of IT power

Total Facility Power is defined to be “power as measured at the utility meter”. IT Equipment Power is defined as “the load associated with all of the IT equipment”. Stated simply, PUE is the ratio of the power delivered to the facility divided by the power actually delivered to the servers, storage, and networking gear. It gives us a measure of what percentage of the power actually gets to the servers with the rest being lost in the infrastructure. These infrastructure losses include power distribution (switch gear, uninterruptable power…...

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