
"As it invites the world to play in a mysterious sandbox it likes to call 'Caffeine',
Google is testing more than just a 'next-generation' search infrastructure. It's testing at least a portion of a revamped software architecture that will likely underpin all of its online applications for years to come. Speaking with The Reg, ueber-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."