How to change a number of mappers running on a slave in MapReduce?
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What is the key- value pair in MapReduce?
Explain job scheduling through JobTracker
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
Why can aggregation not be done in Mapper in MapReduce?
Where is Mapper output stored?
Can you tell us how many daemon processes run on a hadoop system?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
How to create custom key and custom value in MapReduce Job?
What is Combiner in MapReduce?
What does a 'MapReduce Partitioner' do?
Can we set the number of reducers to zero in MapReduce?
Explain what is “map” and what is "reducer" in hadoop?