Apache YARN, which stands for 'Yet another Resource NEGOTIATOR', is Hadoop cluster resource MANAGEMENT system.

YARN provides APIs for REQUESTING and working with Hadoop's cluster resources. These APIs are usually used by components of Hadoop's distributed frameworks such as MapReduce, Spark, and Tez etc. which are building on TOP of YARN. User applications typically do not use the YARN APIs directly. Instead, they use higher level APIs PROVIDED by the framework (MapReduce, Spark, etc.) which hide the resource management details from the user.

Apache YARN, which stands for 'Yet another Resource Negotiator', is Hadoop cluster resource management system.

YARN provides APIs for requesting and working with Hadoop's cluster resources. These APIs are usually used by components of Hadoop's distributed frameworks such as MapReduce, Spark, and Tez etc. which are building on top of YARN. User applications typically do not use the YARN APIs directly. Instead, they use higher level APIs provided by the framework (MapReduce, Spark, etc.) which hide the resource management details from the user.