How do you stop a running job gracefully?

641

Is there any point of learning mapreduce, then?

692

Explain about the partitioning, shuffle and sort phase in MapReduce?

865

What is the difference between HDFS block and input split?

934

What are the data components used by Hadoop?

783

Describe what happens to a mapreduce job from submission to output?

719

Why do we need MapReduce during Pig programming?

705

Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

713

Which are the methods in the mapper interface?

680

What MapReduce framework consists of?

1144

What can be optimum value for Reducer?

998

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

924

Explain what is the function of mapreduce partitioner?

676

How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

697

How to set which framework would be used to run mapreduce program?

747