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What MapReduce framework consists of?
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how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
How does inputsplit in mapreduce determines the record boundaries correctly?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
What is a combiner and where you should use it?
How many InputSplits is made by a Hadoop Framework?
How to set mappers and reducers for MapReduce jobs?
What is a partitioner and how the user can control which key will go to which reducer?
How to write a custom partitioner for a Hadoop MapReduce job?
what is storage and compute nodes?
What is identity mapper and reducer? In which cases can we use them?
How to set which framework would be used to run mapreduce program?
What happens when a datanode fails ?
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