What is a Heartbeat in Hadoop?

556

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

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What is a Backup node in Hadoop?

558

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

495

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

590

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

1278

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What is Balancer in Hadoop?

472

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What is active and passive NameNode in Hadoop?

463

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How can one check whether NameNode is working or not?

541

---

How would you restart NameNode?

422

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How NameNode tackle Datanode failures in Hadoop?

463

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

436

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

449

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What is meant by streaming access?

545

---

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

524

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