What practice involves having multiple power connections to ensure uptime?

The concept of redundancy is crucial in maintaining system uptime, especially in critical computing environments. It refers to the implementation of additional components or resources to serve as backups in case the primary system fails. By having multiple power connections, for instance, if one power source fails, the other can continue supplying power without interrupting the system's operation. This practice minimizes the risk of downtime and enhances reliability.

In the context of power supply, redundancy is often employed through dual or multiple power supplies connected to separate circuits. This setup ensures that if one power supply is interrupted or fails, the others can take over seamlessly, thus preventing any service disruption. This principle extends beyond just power to other areas such as networking, storage, and data management, creating a robust infrastructure designed to withstand failures.

Other concepts, such as clustering, high availability, and fault tolerance, while related to system resilience, have different focuses and implementations in IT infrastructure. Clustering typically involves grouping multiple servers to work together as a single system, which may not specifically address power supply issues. High availability emphasizes ensuring systems remain operational with minimal downtime, often achieved through redundancy but also through other methods, while fault tolerance is about designing systems that continue functioning despite failures, which can include redundancy as one of the mechanisms