Hadoop is an open source implementation of the MapReduce programming model. ... In the HDFS architecture, the master is called a NameNode and the slaves are called DataNodes.

Two Google Fellows just published a paper in the latest issue of Communications of the ACM about MapReduce, the parallel programming model used to process more than 20 petabytes of data every day ...

Google today pledged that it will not sue any users, distributors or developers who have implemented open-source versions of its MapReduce programming model for processing large data sets, even ...