YARN (Yet Another Resource Negotiator) is a cluster management technology from Hadoop that allows for resource management and job scheduling. In the context of Spark, YARN acts as a cluster manager, allowing Spark to run on top of it, thereby leveraging YARN's resource management and scheduling capabilities. It provides a platform to deliver consistent operations, security, and data governance tools across Hadoop clusters. Spark applications can run on YARN, sharing resources with other applications in the Hadoop ecosystem.
