What is a IdentityMapper and IdentityReducer in MapReduce ?
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Is YARN a replacement of Hadoop MapReduce?
How to specify more than one directory as input in the Hadoop MapReduce Program?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
How to change a number of mappers running on a slave in MapReduce?
How to optimize Hadoop MapReduce Job?
What is the difference between Hadoop and RDBMS?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
Where is Mapper output stored?
Can you tell us how many daemon processes run on a hadoop system?
What are advantages of Spark over MapReduce?
Is it necessary to write a mapreduce job in java?
How to optimize MapReduce Job?
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