How to specify more than one path for storage in Hadoop?

515

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What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

592

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What is JPS? Why is it used in Hadoop?

539

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What is the key difference between NameNode and DataNode in Hadoop?

498

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What is Small File Problem in Hadoop? How can it be resolved?

547

---

Ideally what should be replication factor in a Hadoop cluster?

523

---

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

472

---

How often DataNode send heartbeat to NameNode in Hadoop?

547

---

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

527

---

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

540

---

What is Erasure Coding in Hadoop?

516

---

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

571

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

520

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

483

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Why do we need Hadoop?

531

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