MapReduce is a programming model used for processing large datasets with Hadoop.Map: to filter and sort the data setReduce: to perform summary operationsMore information: WikiTutorialsHadoop MapReduce TutorialYahoo MapReduce TutorialJavaCodeGeeks MapReduce Tutorial High-level Hadoop query languages are translated into MapReduce programs, see sections:PigHiveLinkedinFacebookTwitteremailComments