Explain the differences between a combiner and reducer
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How to set mappers and reducers for MapReduce jobs?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What is Hadoop Map Reduce ?
what happens in textinformat ?
What is the need of MapReduce in Hadoop?
How do you stop a running job gracefully?
Where is Mapper output stored?
What is a partitioner and how the user can control which key will go to which reducer?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
Why Mapreduce output written in local disk?
What is Mapper in Hadoop MapReduce?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
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