What is the best way to copy files between HDFS clusters?
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Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What are the various configuration parameters required to run a mapreduce job?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is the difference between an RDBMS and Hadoop?
How to change a number of mappers running on a slave in MapReduce?
What is the need of MapReduce in Hadoop?
What is the core of the job in MapReduce framework?
What is the key- value pair in MapReduce?
List out Hadoop's three configuration files?
Define Writable data types in MapReduce?
List the configuration parameters that have to be specified when running a MapReduce job.
What is a "reducer" in Hadoop?
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