Understanding the difference between Transformations and Actions is one of the most important fundamentals of Apache Spark—and a very common topic in Data Engineering int...
The join strategy selected by Spark can have a significant impact on execution time, shuffle volume, memory utilization, and overall cluster cost.
Understanding how different join strategies work is...
If you’re preparing for a PySpark / Spark / Data Engineering interview, make sure your preparation covers these 5 key areas:
↳ RDD (Resilient Distributed Dataset) operations
↳ DataFrame & Dataset APIs
↳...
As I move from Azure Data Factory into the transformation side of Data Engineering, I wanted to first understand three terms that are often mentioned together:
Apache Spark. PySpark. Databricks.
They are closely related, but they are not the s...
