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Mis Case Study

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<Case Study Questions>

1. What is PUE, and why is it an important place to start when considering how to reduce data center power consumption? What value of PUE should data center managers strive for?
- PUE is simply defined as “Power Usage Effectiveness”. It measures how efficiently data centers use energy. PUE is an important place to start because it makes Google to measure the change in usage effectiveness.
The ratio of PUE is total facility energy over IT equipment energy. A PUE of 1.00 would be best, but 1.09 was the lowest estimated value until 2011 as the video says. Data center managers are still striving for that.

PUE = IT Equipment Energy + Facility Overhead Energy / IT Equipment Energy

2. Describe the five methods recommended by Google for reducing power consumption.
- Measure PUE
As I mentioned in Question 1, the industry uses a ratio called Power Usage Effectiveness (PUE) to measure and help reduce the energy used for non-computing functions. To effectively use PUE, it's important to measure often (at least once per second). If the ratio has a 1.00 PUE, it means the energy can be used in the most effective way possible.
- Manage airflow
Good air flow management is significant to efficient data center operation. By Minimize hot and cold air mixing, Google reduces its power consumption. Google should eliminate hot spots and be sure to use blanking plates (or flat sheets of metal) for any empty slots in the rack. Thermal modeling using computational fluid dynamics (CFD) can help data center managers quickly characterize and optimize air flow for their facilities without having to reorganize the computing room.
- Adjust the thermostat
The belief keeping data centers at 70°F is false. Virtually all equipment manufacturers allow you to run your cold aisle at 80°F or higher which saves a lot of energy that would have been used to…...

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