Differentiate Reducer and Combiner in Hadoop MapReduce?
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What is Text Input Format?
when do reducers play their role in a mapreduce task?
Where is Mapper output stored?
What does a 'MapReduce Partitioner' do?
How to write a custom partitioner for a Hadoop MapReduce job?
What are advantages of Spark over MapReduce?
what does the conf.setMapper Class do ?
What is identity mapper and reducer? In which cases can we use them?
Why is Apache Spark faster than Hadoop MapReduce?
Define the purpose of the partition function in mapreduce framework
What do sorting and shuffling do?
What is a Speculative Execution in Hadoop MapReduce?