What happens when a datanode fails ?
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What comes in Hadoop 2.0 and MapReduce V2 YARN
What is Mapper in Hadoop MapReduce?
Why Mapreduce output written in local disk?
What is KeyValueTextInputFormat in Hadoop MapReduce?
Why comparison of types is important for MapReduce?
What is Data Locality in Hadoop?
How to set mappers and reducers for MapReduce jobs?
Why is Apache Spark faster than Hadoop MapReduce?
Can there be no Reducer?
Explain job scheduling through JobTracker
How to overwrite an existing output file during execution of mapreduce jobs?
Mention what is the next step after mapper or maptask?
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