Are job tracker and task trackers present in separate machines?

510

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What is namenode?

527

---

what if job tracker machine is down?

525

---

What are the four basic parameters of a mapper?

624

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In which location name node sores its metadata and why?

713

---

What are input format, input split & record reader and what they do?

677

---

How namenode handles data node failures?

574

---

What is the non dfs used?

599

---

How can one write custom record reader?

537

---

Whats the default port that jobtrackers listens ?

519

---

Do we need to place 2nd and 3rd data in rack 2 only?

494

---

Is nosql follow relational db model?

512

---

What are the different clustering in mahout?

39

---

What does apache mahout do?

57

---

What is the difference between apache mahout and apache spark’s mllib?

37

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