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7. First Spark Job (PySpark) on a Small CSV

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Chhota CSV groupBy — local/tiny sample. Live multi-node cluster claim nahi.

What you will learn in this chapter

  • Install/runtime options (honest)
  • Read CSV to Spark DataFrame
  • groupBy + write parquet idea
  • Common beginner errors
  • Practice

Fictional labs

India retail stories (Raja Traders Nagpur, Mauli Dairy Pune) are fictional. Spark samples are tiny/local — no live cluster claimed.

Concepts in this chapter

  1. 7.1Runtime Options (Honest)
  2. 7.2Read CSV and groupBy
  3. 7.3Write and Common Errors
  4. 7.4Practice, Tip and Close

The chapter recap is at the end of the last concept page.