Can you define a block and block scanner in hdfs?

50

---

Can you explain about the indexing process in hdfs?

36

---

Can you explain apache kafka?

518

---

Which are the elements of kafka?

606

---

What is the inputsplit in map reduce software?

628

---

Map reduce jobs take too long. What can be done to improve the performance of the cluster?

699

---

Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?

603

---

Is apache spark going to replace hadoop?

355

---

What are the advantage of spark?

292

---

What is the disadvantage of spark sql?

369

---

When to use spark sql?

311

---

What are the great features of spark sql?

288

---

Can you explain apache spark?

322

---

What is apache presto?

3

---

Describe REVERSE function in Hive with example?

714

---