Yahoo builds ultimate private cloud

The private cloud expands & contracts resources nearly instantaneously and doesn't rely on a public cloud for extra capacity.

Imagine the kind of infrastructure needed for a website fielding 1.5 million requests per second. That was one of the challenges faced by Yahoo's Todd Papaioannou, vice president of cloud architecture.

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"What's my biggest pain spot? No, it's not Google," he recently quipped with attendees during his keynote speech at the Cloud Leadership Forum, held last month in Santa Clara, Calif. "My biggest problem is elasticity. VM spin-up time. Virtualization isn't there yet." Ten to 20 minutes is just too long to handle a spike in Yahoo's traffic when big news breaks such as the Japan tsunami or the death of Osama bin Laden or Michael Jackson.

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