What is a Heartbeat in Hadoop?

602

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

546

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What is a Backup node in Hadoop?

603

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What do you mean by the NameNode High Availability in hadoop?

528

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What is the default replication factor in Hadoop and how will you change it?

638

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Why Hadoop performs replication, although it results in data redundancy?

1308

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What is Balancer in Hadoop?

521

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What is active and passive NameNode in Hadoop?

501

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How can one check whether NameNode is working or not?

581

---

How would you restart NameNode?

452

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How NameNode tackle Datanode failures in Hadoop?

510

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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

475

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If DataNode increases, then do we need to upgrade NameNode in Hadoop?

496

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What is meant by streaming access?

589

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How to add/delete a Node to the existing cluster?

565

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