Issue 12, Oct/Nov
FOCUS JAPANESE EMMISSIONS
In terms of ITEU, Dr Shiino recognizes that utilization rates fluctuate in relation to the type of task being performed. For example, financial batch processing tends to take place at night and therefore equipment tends to be idle during the day, thus pushing the average utilization rates down, whereas web servers can have steady demand and more steady utilization rates.
Taking these and factors such as virtualization into account, Dr Shiino calculates that current utilization rates are between 30% and 50%. Accordingly, he says that even in data centers, where the ITEU stands at around 30%, “it
JAPAN: CO2 REDUCTION TARGETS
The first target was to reduce CO2 by 6% between 1990-2012. Figures show that by 2008, there was an actual increase of 1.9%. The new target of cutting CO2 by 25% by 2020 is actually showing an increase of 41.7% for commercial CO2 emissions.
“Data centers are facing increasing demands from society. Large data packets such as color emails, the increased use of photo and video, and other internet use are all pushing up energy use within data centers,” says Dr Takao Shiino,
chairman of the Environment Departmet at JISA.
Another trend, according to Shiino, is that whenever new IT equipment is installed in a data center it actually drives up total energy use because “the latest equipment installed to improve processing capacity becomes smaller year by year”. “Each time such equipment is installed, the amount of energy consumption per unit floor area increases,” he says
Without action, the predicted growth for data
center energy use is vast. In 2008, the Green IT Promotion Council was established in Japan to promote energy conservation in IT and related industries. It produced a report estimating Japanese data center power use in 2005, 2025 and 2050. “It showed that in 2005, data centers used 14.6bn kWH. This will increase six-fold by 2025 to 82.5bn kWh, and more than double again by 2050 to 171.9bn kWh,” Shiino says.
Global figures show equally alarming rates of growth. Unchecked, this will be unsustainable.
is thought this could increase to 50% – an improvement by a factor of 1.7”.
Improvements to PUE are ongoing. Figures from the US Environmental Protection Agency show average PUE numbers for data centers in the US are around 1.91 – the range is from 1.25 to 3.75. In Japan, data centers using best practice such as free air cooling have a 1.45–1.5 PUE.
Finally GEC. The improvements that can be made in Japan by companies adopting renewable energy sources could rise by 10%, offering a 1.1- fold improvement in energy efficiency, Shiino
says. Although it would be difficult for all data centers to show these rates of improvement in every factor, Dr Shiino says: “If we can improve the ITEE value by a factor of four, the ITEU by 1.7, the PUE by 1.4 and the GEC by 1.1, we would be able to attain a 10-fold improvement in energy efficiency over five years.”
Dr Takao Shiino will make a presentation to DatacenterDynamics’ Tokyo conference on October 18.
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