What are the components of MapReduce

  • JobTracker and TaskTracker are the main components of the mapreduce
  • Job Tracker
    Job Tracker is a master which creates and runs the job. JobTracker that runs on name node, allocates the job to TaskTrackers.
  • TaskTracker
    TaskTracker is a slave and runs on data node. TaskTracker runs the tasks and reports the status of task to JobTracker.