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    Priya replied to the topic MapReduce Components in the forum Big Data and Hadoop 6 years, 6 months ago

    MapReduce has 2 key components:
    Job Tracker:
    Coordinates all the jobs run on the system by scheduling tasks
    Keeps a record of overall progress of each job
    If a job fails, reschedules the job on a different tasktracker

    Task Tracker:
    Slave daemon which accepts tasks to be run a block of data
    Sends progress reports as heart beat signals to the Job…Read more