Database Reference
In-Depth Information
Anatomy of a YARN Application Run
YARN provides its core services via two types of long-running daemon: a resource man-
ager (one per cluster) to manage the use of resources across the cluster, and node managers
running on all the nodes in the cluster to launch and monitor containers . A container ex-
ecutes an application-specific process with a constrained set of resources (memory, CPU,
and so on). Depending on how YARN is configured (see YARN ) , a container may be a
Unix process or a Linux cgroup. Figure 4-2 illustrates how YARN runs an application.
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