Engineering teams from Facebook, Google, LinkedIn, and Twitter have begun work on WebScaleSQL, a project designed to address the challenges of running MySQL at Web scale."Delivering a reliable, personalized experience for the 1.23 billion people who use Facebook requires an expansive and large-scale infrastructure," says Steaphan Greene, a Facebook software engineer. "As Facebook has grown, so has our MySQL deployment, and that deployment is now one of the largest in the world. Along the way, we've learned and benefited from code changes made by the MySQL community."