Answer / Umendra Singh

A typical Hadoop application consists of a JobTracker and TaskTrackers (or more specifically, MapReduce JobTracker and TaskTrackers). The JobTracker manages the job's lifecycle while distributing tasks to TaskTrackers. Each application also has InputFormat, Mapper, Reducer, OutputFormat for data processing.

What is partioner in hadoop? Where does it run,mapper or reducer?

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Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

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What other technologies have you used in hadoop sta ck?

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How can we change the split size if our commodity hardware has less storage space?

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What is oozie in hadoop?

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Why password is needed in ssh localhost?

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What is a task instance in hadoop? Where does it run?

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Explain InputFormat?

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Virtual Box & Ubuntu Installation?

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Name some companies that use Hadoop?

1 Answers   Airtel,

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Explain the hadoop configuration files at present?

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what are the nodes in the Hadoop cluster?

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