How can you add the arbitrary key-value pairs in your mapper?
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How much space will the split occupy in Mapreduce?
Explain the differences between a combiner and reducer
In Hadoop, which file controls reporting in Hadoop?
what is distributed cache in mapreduce framework?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
How many numbers of reducers run in Map-Reduce Job?
What are the various InputFormats in Hadoop?
what is NameNode in Hadoop?
What does a split do?
Explain job scheduling through JobTracker
Define Writable data types in MapReduce?
When is it not recommended to use MapReduce paradigm for large scale data processing?