data center infrastructure efficiency (DCiE)
What is data center infrastructure efficiency?
Data center infrastructure efficiency (DCiE) is a metric used to determine the energy efficiency of a data center.
DCiE was developed by members of The Green Grid, an industry group focused on data center energy efficiency.
How to calculate DCiE
DCiE, which is expressed as a percentage, is calculated by dividing IT equipment power by total facility power.
DCiE = IT Equipment Power/Total Facility Power x 100%
DCIE is the reciprocal of power usage effectiveness (PUE). PUE is defined as the total facility power divided by the IT equipment power.
DCiE = 1/PUE.
How to determine energy use
- Take a measurement of energy use at or near the facility utility's meter. If the data center is in a mixed-use facility or office building, take a measurement only at the meter that is powering the data center. If the data center is not on a separate utility meter, estimate the amount of power being consumed by the non-data center portion of the building and remove it from the equation.
- Measure the IT equipment load, which should be measured after power conversion, switching and conditioning is completed. According to The Green Grid, the most likely measurement point would be at the output of the computer room power distribution units. This measurement should represent the total power delivered to the server racks in the data center.