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When submitting Spark jobs, how does the process work in the backend? Explain.

Spark/Big Datahard0.4 min readPremium
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Asked at 1 company
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Dunnhumby
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optimizationspark
Expert AnswerPremium
85 wordsInterview-ready
**Process**: (1) Driver parses code, builds DAG. (2) DAG sent to cluster manager (YARN/K8s). (3) Manager allocates executors. (4) Driver splits DAG into stages (wide boundaries). (5) Tasks sent to executors. (6) Executors run, report back. (7) Driver collects results for actions. (8) Next stage until done. **Why Stages**: Wide transformations require shuffle; can't proceed until previous stage completes. **Scalability Trade-offs**: Driver single point; cluster deploy for resilience....
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