Google
Estimated to have one million servers in about 36 datacentres.
One of its main datacentres is on the banks of the Columbia River
at
The
Dalles, Oregan. It is said to have best-in-class energy costs
for the amount of computing power. Two main buildings are at The
Dalles, each of about 6,500 square metres.
Amazon
Another hush-hush datacentre is at Boardman, Oregan, which is
said to be owned by Amazon. It has three buildings and a 10MW
electricity substation.
Microsoft
Its Quincy facility in Washington state houses the initial
version of its Windows Azure cloud-based operating system. The
facility is said to be the size of 10 American football pitches,
and has 1.5 metric tons of batteries for back-up power. The
datacentre consumes 48MW - enough power for 40,000 homes. Microsoft
is building other facilities in Chicago, San Antonio and Dublin.
The company is also said to be looking for a site in Siberia. Bill
Gates said last year that Microsoft already has hundreds of
thousands of servers and will have "many millions" in future.
Yahoo
It also chose the tiny town of Quincy - population 5,044, tucked
in a valley dotted with potato farms - for a facility of about
13,000 square metres, its second datacentre in the region. The
company says it plans to operate both datacentres with a
zero-carbon footprint by using, among other things, hydropower,
water-based chillers and external cold air to do some of the
cooling. As some observers put it, the potato farms have yielded to
the server farms.
eBay
16,000 servers, 268 million users, three basic applications:
e-commerce auction, Paypal and Skype.
Source Randy
Katz and Ian Osborne, Intellect.