DW Energy Efficiency Guidelines
A 2007 survey revealed that 63% of data centers were running out
of power, space or cooling capacity. Clearly the growth curve was
misdrawn, and solutions to expand data centers are being balanced
by considering more effectives ways to utilise current capacity.
When evaluating the energy efficiency of a data warehouse infrastructure,
- Power Consumption of all the equipment that makes up the infrastructure
- all the hardware, including additional networking hardware and
network load. Also include the higher demands the data warehouse
operations place on network switch usage in terms of length of
time and number of cycles.
- Additional cooling needed - vendor specifications do not always
include this information. As a standard, assume one watt of energy
used requires one watt to cool.
- Space occupied - calculate at least the area the equipment
will require. In many data centers, height matters also. Also
project the area required to accommodate future data growth, such
as how much extra space will be used up when you add 5TB capacity?
According to a survey by ONStor, Inc. sixty-three percent of the
369 IT professionals said that running out of space or power in
their data centers had already occurred.
Whilst 60 percent had already adopted energy-efficient practices
in response to outages, around 40 percent said it had not prompted
them to discuss green data center initiatives. Instead, they viewed
such events as outages as standard operational risk, or requested
more budget to purchase more generators or take over more space.
Power and space constraints will become a standard operational
mode if current practices don’t change. Green computing is
addressing a potential need, practiced now it will prevent recurrences
of power limitations, save on energy costs, and avoid construction,
by many organizations.
Replacing two boxes with one appliance that uses far less energy
than the two boxes combined makes sense.
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