Greenplum MapReduce - the Ubiquity of SQL with the Programming Model of MapReduce: "MapReduce has been proven as a technique for high-scale data analysis by Internet leaders such as Google and Yahoo. Greenplum gives enterprises the best of both worlds – MapReduce for programmers and SQL for DBAs – and will execute both MapReduce and SQL directly within Greenplum’s parallel dataflow engine, which is at the heart of the Greenplum Database.
Greenplum MapReduce enables programmers to run analytics against petabyte-scale datasets stored in and outside of the Greenplum Database. Greenplum MapReduce brings the benefits of a growing standard programming model to the reliability and familiarity of the relational database. The new capability expands the Greenplum Database to support MapReduce programs."