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What are the primary phases of a Reducer?
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Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
How to set the number of reducers?
When Namenode is down what happens to job tracker?
What do you mean by shuffling and sorting in MapReduce?
How to submit extra files(jars, static files) for MapReduce job during runtime?
Why can aggregation not be done in Mapper in MapReduce?
How many numbers of reducers run in Map-Reduce Job?
How does inputsplit in mapreduce determines the record boundaries correctly?
What is Hadoop Map Reduce ?
How does MapReduce framework view its input internally?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
What is the need of MapReduce in Hadoop?
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