WHAT IS JOBTRACKER?

Ashish Pandey

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Posted by  Ashish Pandey
Hadoop 
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  1. Ashish Pandey

    Post:11

    Points:55
    What is JobTracker?


    Job Tracker -

    JobTracker is the service within Hadoop that runs MapReduce jobs on the cluster.
    JobTracker process runs on a separate node and not usually on a DataNode.
    JobTracker is an essential Daemon for MapReduce execution in MRv1. It is replaced by ResourceManager/ApplicationMaster in MRv2.
    JobTracker receives the requests for MapReduce execution from the client.
    JobTracker talks to the NameNode to determine the location of the data.

      Modified On Mar-28-2016 05:04:33 AM

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