Google Caffeine: What it really is

"Speaking with The Reg, über-Googler Matt Cutts confirms that the company's new Caffeine search infrastructure is built atop a complete overhaul of the company's custom-built Google File System, a project two years in the making. At least informally, Google refers to this file system redux as GFS2.

""There are a lot of technologies that are under the hood within Caffeine, and one of the things that Caffeine relies on is next-generation storage," he says. "Caffeine certainly does make use of the so-called GFS2."

"Asked whether Caffeine also includes improvements to MapReduce, Google's distributed number-crunching platform, or BigTable, its distributed real-time database, Cutts declines to comment. But he does say that with Caffeine, Google is testing multiple platforms that could be applied across its entire online infrastructure - not just its search engine."

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