1.
Google Revealed: The IT Strategy That Makes It Work
"A unique mix of internally developed software, open source, made-to-order hardware, and people management is the secret behind the search engine.
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But a day spent with some of the company's IT leaders reveals there's more to Google's IT operations than a search engine running on a massive server farm. Behind the seeming simplicity is a mash-up of internally developed software, made-to-order hardware, artificial intelligence, obsession with performance, and an unorthodox approach to people management."
2.
Google Goes Its Own Way In The Data Center
"George Mason University professor Paul Strassmann suggested in a lecture last December that Google's Linux-based infrastructure is considerably cheaper to buy and maintain than a comparable setup of Sun Microsystems servers or Windows servers would cost. For IT shops that spend half their budgets just keeping machines up and patched, the implications are significant. Strassmann said IT pros know where they need to go--toward a Google-style architecture.
Some of the new servers going into Google's data centers are probably equipped with AMD Opteron multicore processors. Google won't confirm that, but one of the reasons AMD chips are selling so well to other companies is that they don't throw off as much heat as older alternatives. Google engineers, who pay close attention to microprocessor efficiency and heat dissipation, must find AMD chips hard to ignore. Intel is racing to improve the performance-per-watt of its own processor line
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Electric power may be expensive, but it's cheap compared to brainpower"
Conclusion: It is not least about hardware, bandwith and cheap energy supply and Google seems to have the right brain power, too.