YARN ResourceManager

The YARN ResourceManager is like the control tower for a computing cluster, managing and allocating resources (such as CPU and memory) across various applications running on multiple servers. It oversees job scheduling, ensuring that tasks are assigned efficiently and fairly, so the system runs smoothly. Think of it as the coordinator that directs and monitors how computing power is shared, preventing conflicts and optimizing performance. This helps organizations run large-scale data processing tasks reliably and effectively without manual intervention.