The YARN Resource Manager is a global COMPONENT or daemon, one per cluster, which MANAGES the REQUESTS to and resources ACROSS the nodes of the cluster.

The Resource Manager has two main components - Scheduler and Applications Manager.

Scheduler - The scheduler is responsible for ALLOCATING resources to and starting applications based on the abstract notion of resource containers having a constrained set of resources.

Application Manager - The Applications Manager is responsible for accepting job-submissions, negotiating the first container for executing the application specific Application Master and provides the service for restarting the Application Master container on failure.

The YARN Resource Manager is a global component or daemon, one per cluster, which manages the requests to and resources across the nodes of the cluster.

The Resource Manager has two main components - Scheduler and Applications Manager.

Scheduler - The scheduler is responsible for allocating resources to and starting applications based on the abstract notion of resource containers having a constrained set of resources.

Application Manager - The Applications Manager is responsible for accepting job-submissions, negotiating the first container for executing the application specific Application Master and provides the service for restarting the Application Master container on failure.