Sometimes there is a need for a simple, high-level implementation of ECTL in Spark with a lightning-fast introduction to Spark concepts. study based on a real story. I wish to present an idea of dealing with multiple input formats and structures in a unified approach using Spark. As a result to use it in your Data Science oriented environment as a preparation step for further analyses and experiments. Such a way of handling non-production data inputs particularly helped with providing data quality analyses and conducting experiments on production-like sized datasets without the need of "testing on production" mess.