how indexing in HDFS is done?
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What is a Speculative Execution in Hadoop MapReduce?
how Hadoop is different from other data processing tools?
What is MapReduce? What are the syntax you use to run a MapReduce program?
mapper or reducer?
What is the use of InputFormat in MapReduce process?
What is the input type/format in MapReduce by default?
What is shuffling and sorting in Hadoop MapReduce?
how can you debug Hadoop code?
What is an identity mapper and identity reducer?
Why is output file name in Hadoop MapReduce part-r-00000?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
How do ‘map’ and ‘reduce’ work?
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