Greenplum leverages open source database software and incorporates a “shared-nothing architecture that employs parallel processing on commodity hardware.”

Sun Microsystems CEO Jonathan Schwartz said that the investment, in conjunction with their recent acquisition of MySQL, provided further evidence of Sun’s commitment to the open source database community and marketplace.

The company has previously taken two rounds of $15 million each in March 2006 and February 2007. The new funding will be used to continue development of Greenplum’s database software, as well as to expand the company’s sales and marketing efforts.