Why is Data Block size set to 128 MB in Hadoop?

446

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What is a Heartbeat in Hadoop?

566

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

516

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What is a Backup node in Hadoop?

566

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

503

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

599

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

1285

---

What is Balancer in Hadoop?

483

---

What is active and passive NameNode in Hadoop?

471

---

How can one check whether NameNode is working or not?

550

---

How would you restart NameNode?

427

---

How NameNode tackle Datanode failures in Hadoop?

473

---

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

446

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

461

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What is meant by streaming access?

552

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