YARN is one of the important features in Spark and it is very much similar to Hadoop that provides a resource management platform to deliver operations that are scalable across the cluster. YARN is termed as the distributed container manager and Spark as the data processing tool. Both the Spark and Hadoop MapReduce can run on YARN. Spark can run independently from its installation process. There is no need to install Spark on YARN cluster nodes because it runs on the top of YARN.