6. Apache Spark Explained Simply
Spark = distributed data processing engine. Cluster shabda, RDD/DataFrame intuition — soft start.
What you will learn in this chapter
- Why Spark exists (bigger than one laptop)
- Driver / executor mental model
- DataFrame API idea
- When pandas is enough
- 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
The chapter recap is at the end of the last concept page.