What is a "map" in Hadoop?

500

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What is a "reducer" in Hadoop?

532

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what is Speculative Execution?

527

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Explain JobConf in MapReduce.

517

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What is OutputCommitter?

506

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How is reporting controlled in hadoop?

464

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What is Hadoop Map Reduce ?

535

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what does the text input format do?

518

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What happens when a datanode fails ?

491

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In Hadoop, which file controls reporting in Hadoop?

484

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how can you debug Hadoop code?

514

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For a job in Hadoop, is it possible to change the number of mappers to be created?

489

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What are the primary phases of a Reducer?

526

---

how indexing in HDFS is done?

492

---

What is the role of a MapReduce partitioner?

501

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