Functions of the NodeManager

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A NodeManager is the resource and task manager of each node. On one hand, a NodeManager periodically reports to its associated ResourceManager regrading resource usage of the local node and the running status of each Container. On the other hand, a NodeManager receives and processes requests from its associated ApplicationMaster for starting or stopping Containers.

Other related questions:
Functions of the NodeManager
A NodeManager is the resource and task manager of each node. On one hand, a NodeManager periodically reports to its associated ResourceManager regrading resource usage of the local node and the running status of each Container. On the other hand, a NodeManager receives and processes requests from its associated ApplicationMaster for starting or stopping Containers.

What is NodeManager used for?
A NodeManager is the resource and task manager of each node. On one hand, a NodeManager periodically reports to its associated ResourceManager regrading resource usage of the local node and the running status of each Container. On the other hand, a NodeManager receives and processes requests from its associated ApplicationMaster for starting or stopping Containers.

Functions of Oozie
Oozie is an open source workflow engine that is used to schedule and coordinate Hadoop jobs.

RAID function
The function of RAID is as follows: 1. Improving data reliability 2. Providing data read and write performance

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