Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?

662

Is it necessary to write a mapreduce job in java?

627

What is a "reducer" in Hadoop?

870

What is the use of InputFormat in MapReduce process?

651

what is a Task Tracker in Hadoop?

701

What is the difference between RDBMS with Hadoop MapReduce?

798

Explain what is the function of mapreduce partitioner?

640

When is it suggested to use a combiner in a MapReduce job?

636

How do reducers communicate with each other?

667

Explain InputSplit in Hadoop MapReduce?

674

Explain what you understand by speculative execution

606

Is it important for Hadoop MapReduce jobs to be written in Java?

845

What is the Job interface in MapReduce framework?

908

What is the default value of map and reduce max attempts?

932

What is the Reducer used for?

923