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Thursday, 9 February 2017

Key value pairs
























MapR will play key role in Hadoop

The input data is placed in HDFS


once job is submiited to the Hadoop Cluster

The NN dispatch Blocks To Dn's and Start Task of Parallel massive Program Execution



In each phase


input    <k1,v1>  pair

Mapper <k1,12>----><k2,v2>


Reducer <k2,v2>---<k3,v3>



The Input Key,Value Format will play key role the next session part with program demo.....







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