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Posted on    January-20-2015 12:12 AM

 .NET Hadoop 
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Ashish Pandey

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Posted on    January-20-2015 1:12 AM

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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