How does pipe operation writes the result to standard output in Apache Spark?

375

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Explain how you can get exactly once messaging from kafka during data production?

566

---

What is combiner aggregator?

651

---

When do you call the cleanup method?

561

---

What are the key benefits of using storm for real time processing?

584

---

Mention what is the meaning of broker in kafka?

554

---

What is zeromq?

566

---

How do you define a partitioning key?

577

---

Explain how to write the output into a file using storm?

607

---

Which components are used for stream flow of data?

611

---

Mention what is the difference between apache kafka and apache storm?

605

---

Explain when using field grouping in storm, is there any time-out or limit to known field values?

637

---

Explain how you can reduce churn in isr? When does broker leave the isr?

818

---

Is it necessary to kill the topology while updating the running topology?

631

---

What is struct and explain its purpose?

580

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