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Difference between mapreduce and spark
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What is the need of MapReduce in Hadoop?
What MapReduce framework consists of?
When is it not recommended to use MapReduce paradigm for large scale data processing?
What is the relation between MapReduce and Hive?
What is SequenceFileInputFormat?
What is mapper in map reduce?
Where is the output of Mapper written in Hadoop?
What is RecordReader in a Map Reduce?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
Does Partitioner run in its own JVM or shares with another process?
What is map/reduce job in hadoop?
Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?
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