What is the best way to copy files between HDFS clusters?
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More MapReduce Interview Questions
Explain combiners.
When the reducers are are started in a mapreduce job?
How do you stop a running job gracefully?
What is the difference between a MapReduce InputSplit and HDFS block?
It can be possible that a Job has 0 reducers?
mapper or reducer?
What is identity mapper and reducer? In which cases can we use them?
How is reporting controlled in hadoop?
How to optimize MapReduce Job?
In MapReduce, ideally how many mappers should be configured on a slave?
Explain what does the conf.setMapper Class do in MapReduce?
What is Reduce only jobs?
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