How often DataNode send heartbeat to NameNode in Hadoop?

577

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What is Mapper? How can we compress Mapper output in Hadoop?

551

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What is Rack Awareness? What is its need in Hadoop?

568

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What is Erasure Coding in Hadoop?

543

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Why do we need Hadoop Archives? How is it created?

604

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What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

548

---

What is CAP Theorem? What aspects does Hadoop support from this theorem?

518

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Why do we need Hadoop?

564

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What are the core components of Hadoop?

554

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What are the Features of Hadoop?

559

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Compare Hadoop and RDBMS?

452

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What are the modes in which Hadoop run?

550

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What are the features of Standalone (local) mode?

641

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What are the features of Pseudo mode?

544

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What are the features of Fully-Distributed mode?

546

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