Description: Node Manager in Hadoop is an essential component within the Hadoop ecosystem, responsible for managing the lifecycle of containers running on a single node in a cluster. Its primary function is to monitor and control the node’s resources, ensuring that applications run efficiently and effectively. Node Manager handles resource allocation, monitors the status of containers, and manages task execution. Additionally, it communicates with the Resource Manager, which is responsible for planning and allocating resources at the cluster level. This daemon allows multiple applications to run simultaneously on the same node, optimizing resource usage and improving overall system performance. Among its most notable features are the ability to restart failed containers, manage application logs, and implement security policies for access to node resources. In summary, Node Manager is crucial for ensuring that distributed applications operate smoothly and efficiently in a distributed environment.
