Name job control options specified by mapreduce.
For a job in Hadoop, is it possible to change the number of mappers to be created?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
What are the data components used by Hadoop?
Explain the Reducer's reduce phase?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
How data is spilt in Hadoop?
What are the identity mapper and reducer in MapReduce?
Can we set the number of reducers to zero in MapReduce?
Define Writable data types in Hadoop MapReduce?
What is Combiner in MapReduce?
Define the purpose of the partition function in mapreduce framework
What is Reducer in MapReduce?