Very Hot Topic in Data Engineering to process large amounts of data. What is Spark and why is it required? Spark is a unified analysis of an engine for large-scale data processing. it is an open-source, distributed computing engine that provides an efficient environment for data analysis. It is 100 times faster the MapReduce. As we know there are two types of storage systems available in the computing machine. In Memory data processing System Disk-based processing system Disk-Based vs.