Federation

Federation allow multiple independent clusters to be used together for very large jobs, or for tenants who have capacity across all of them.

Cluster

On a cluster level, Yarn consists of:

• a single global leader process ResourceManager,
• a per-node (worker|agent) NodeManager ,

More … see Yarn - Cluster

Application

On a application level, Yarn consists of:

• a per-application ApplicationMaster
• a per-application Container running on a NodeManager