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In Hadoop what is InputSplit?
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If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
What are the various configuration parameters required to run a mapreduce job?
What are the primary phases of a Reducer?
Write a short note on the disadvantages of mapreduce
how can you debug Hadoop code?
Why Mapreduce output written in local disk?
What is the Job interface in MapReduce framework?
How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What is a partitioner and how the user can control which key will go to which reducer?
What is the core of the job in MapReduce framework?
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