how indexing in HDFS is done?
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What are the disservices of utilizing Apache Spark over Hadoop MapReduce?
Can you tell us how many daemon processes run on a hadoop system?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
Define speculative execution?
How to optimize Hadoop MapReduce Job?
How to set the number of mappers for a MapReduce job?
What combiners are and when you should utilize a combiner in a map reduce job?
What are the advantages of using map side join in mapreduce?
What is shuffling in mapreduce?
Explain job scheduling through JobTracker
What is the InputSplit in map reduce ?
What is the role of recordreader in hadoop mapreduce?