What is a Heartbeat in Hadoop?

560

---

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

---

What is a Backup node in Hadoop?

562

---

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

495

---

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

592

---

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

1283

---

What is Balancer in Hadoop?

472

---

What is active and passive NameNode in Hadoop?

463

---

How can one check whether NameNode is working or not?

544

---

How would you restart NameNode?

424

---

How NameNode tackle Datanode failures in Hadoop?

467

---

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

438

---

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

455

---

What is meant by streaming access?

549

---

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

527

---