How to create a custom key and custom value in MapReduce Job?
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How many numbers of reducers run in Map-Reduce Job?
what is WebDAV in Hadoop?
how Hadoop is different from other data processing tools?
What are the various InputFormats in Hadoop?
Define Writable data types in MapReduce?
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.
Difference between mapreduce and spark
What are the primary phases of a Reducer?
How data is spilt in Hadoop?
What is SequenceFileInputFormat?
How do reducers communicate with each other?
What are the advantages of using mapreduce with hadoop?
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