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What is Combiner in Hadoop?
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What is a combiner in hadoop?
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Mention what daemons run on a master node and slave nodes?
What is replication factor?
Explain the key benefits of using storm for real time processing?
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Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
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