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Question

In Hadoop MapReduce, how are map tasks distributed across the cluster?

a.

Each map task runs on a random datanode

b.

The jobtracker assigns map tasks to tasktrackers based on data locality

c.

All map tasks run on the namenode

d.

Map tasks are evenly distributed across all nodes in the cluster

Posted under Big Data Computing

Answer: (b).The jobtracker assigns map tasks to tasktrackers based on data locality Explanation:Map tasks in Hadoop MapReduce are assigned to tasktrackers based on data locality by the jobtracker.

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Q. In Hadoop MapReduce, how are map tasks distributed across the cluster?
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