What is RecordReader in a Map Reduce?
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How to optimize MapReduce Job?
What is Output Format in MapReduce?
Define speculative execution?
How many Reducers run for a MapReduce job?
what is WebDAV in Hadoop?
What counter in Hadoop MapReduce?
What are the identity mapper and reducer in MapReduce?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is the best way to copy files between HDFS clusters?
What are the data components used by Hadoop?
What is the core of the job in MapReduce framework?
What is the use of InputFormat in MapReduce process?