What can be optimum value for Reducer?

710

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

460

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

621

Where sorting is done on mapper node or reducer node in MapReduce?

507

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

519

Is it possible to rename the output file?

598

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

453

Where the mapper's intermediate data will be stored?

478

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

561

Is reduce-only job possible in Hadoop MapReduce?

492

how can you debug Hadoop code?

638

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

497

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

490

Compare Pig vs Hive vs Hadoop MapReduce?

502

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

761