Load Balancing
Load balancing is a technique that intelligently distributes network traffic or computing tasks across multiple servers, ensuring that no single server becomes overloaded, thereby improving the overall performance and reliability of the system.
How it works
It typically works through a dedicated device or piece of software (a load balancer) that checks the health of backend servers and assigns new requests to the most suitable server according to preset algorithms (such as round-robin or least connections). This is essential for handling high-traffic websites, online services, and applications, preventing server crashes and ensuring users enjoy a fast, stable experience.
Examples
- 1.A popular e-commerce website uses load balancing during sales events to spread massive volumes of shopping requests across dozens of backend servers.
- 2.A video streaming platform uses load balancing to route user requests from different regions to the nearest or least loaded data center servers, ensuring smooth video playback.
- 3.A bank's mobile app uses a load balancer to securely distribute users' login and transaction requests across multiple application server clusters, keeping the service running without interruption.