Question - What are the main components of YARN? Can you explain them?
Answer -
The main components of YARN are explained below:
- Resource Manager: It runs on a master daemon and is responsible for controlling the resource allocation in the concerned cluster.
- Node Manager: It is responsible for executing a task on every single data node. Node manager also runs on the slave daemons in Hadoop.
- Application Master: It is an important component of YARN as it controls the user job life cycle and the resource demands of single applications. The application master works with the node manager to monitor the task execution.
- Container: It is like a combination of the Hadoop resources, which may include RAM, network, CPU, HDD, etc., on one single node.