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

365

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

523

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What is combiner aggregator?

592

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When do you call the cleanup method?

526

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

543

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Mention what is the meaning of broker in kafka?

507

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What is zeromq?

523

---

How do you define a partitioning key?

539

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

546

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Which components are used for stream flow of data?

577

---

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

553

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

589

---

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

750

---

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

578

---

What is struct and explain its purpose?

514

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