How do you stop a running job gracefully?
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What do you understand by compute and storage nodes?
Explain what you understand by speculative execution
Is it important for Hadoop MapReduce jobs to be written in Java?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
what job does the conf class do?
What is the use of InputFormat in MapReduce process?
What is the core of the job in MapReduce framework?
What is the difference between HDFS block and input split?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
What is reduce side join in mapreduce?
Where the mapper's intermediate data will be stored?
What is the InputSplit in map reduce ?