Chris Malone and Ben Jai presented “Insights into Google’s PUE”
Areas to be discussed are
- Innovations and best practices
- Measurement and method & accuracy
- Benefits of measuring PUE
and a PUE update + a google server on display
Some details discussed were.
Typical data center PUE is 2.0 vs. Google’s 1.16.
85% reduction in cooling .7 vs. 0.15 achieved by Closed-couple cooling , raise temperatures, economizers
80% Power distribution .22 vs. 0.039 by 99.9% efficient UPS
This last point of 99.9% efficient UPS is where Ben Jai explained the google approach for UPS. electronics design responsibility.2003 –2007.
Ben pointed out he did not seek out to find a UPS solution. But, started looking at the server and issues. Over provisioning in power supply is a problem. Google Server has PSU to motherboard to disk. Let motherboard make determination of disk drive power requirements.
The next was add a battery to the motherboard to provide the battery backup required for the server.
Below is a picture of the motheboard with power supply and battery changes. The server is now close to a laptop design, but only enough battery power to allow backup power to be provided vs. the hours we expect for laptops.