Facebook has the second largest installation of Hadoop (a software platform that lets one easily write and run distributed applications that process vast amounts of data), Yahoo being the first. It is also the creator of Hive, a data warehouse infrastructure...
Yahoo! is releasing its own distribution of Hadoop: Hadoop is a distributed file system and parallel execution environment that enables its users to process massive amounts of data. In response to frequent requests from the Hadoop community, Yahoo! is...
The basic model for MapReduce derives from the map and reduce concept in functional languages like Lisp. In Lisp, a map takes as input a function and a sequence of values and applies the function to each value in the sequence. A reduce takes as input...