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How do ‘map’ and ‘reduce’ work?
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Why Mapreduce output written in local disk?
What is MapReduce? What are the syntax you use to run a MapReduce program?
Explain what is shuffling in mapreduce?
Illustrate a simple example of the working of MapReduce.
What is the use of InputFormat in MapReduce process?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
Explain the Reducer's Sort phase?
What does a split do?
In Map Reduce why map write output to Local Disk instead of HDFS?
Is there any point of learning mapreduce, then?
Explain task granularity
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Apache Hadoop (394) - MapReduce (354)
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- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
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- Hadoop General (407)
