If you’ve ever run a Spark job and wondered how it can process millions or billions of rows so efficiently, the secret lies in the Catalyst Optimizer. Think of it as Spark’s internal brain — taking your high-level transformations and figuring out the most efficient way to execute them across a cluster. Understanding Catalyst isn’t... Continue Reading →
Logical vs Physical Plan in Spark: Understanding How Your Code Really Runs
If you’ve worked with Apache Spark, you’ve likely written transformations like filter(), map(), or select() and wondered, “How does Spark actually execute this under the hood?” The answer lies in logical and physical plans — two key steps Spark uses to turn your code into distributed computation efficiently. Understanding this will help you optimize performance... Continue Reading →
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