Cloudera, a Burlingame, Calif.-based startup that is building commercial services around open-source software framework Hadoop, has closed $6 million in Series B funding, bringing the total raised by the company to $11 million. The latest round of funding was led by Greylock Partners. Current investor Accel Partners also participated in this round. Cloudera’s other investors include Diane Greene (former CEO of VMware) and Marten Mickos (former CEO of MySQL). Cloudera was started in 2008 by Mike Olson; Christophe Bisciglia, who created and led Google’s academic cloud computing initiative; Dr. Amr Awadallah, Yahoo’s VP of engineering; and Jeff Hammerbacher, formerly with Facebook. (Related posts: The Data Mining Renaissance and Supercomputers, Hadoop, MapReduce and the Return to a Few Big Computers)