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,
Unix process or a Linux cgroup.
Figure 4-2
illustrates how YARN runs an application.