Load Balancing Across Servers

Load balancing spreads incoming traffic across multiple servers so no single server is overwhelmed. Instead of one busy server slowing down, several share the work, improving performance and reliability. A device or service called a load balancer sits in front of the servers and distributes requests among them, making a server pool look like one fast service.

Load balancing delivers two big benefits: scalability and availability. Adding more servers behind the balancer increases capacity to handle growth, and if one server fails, the balancer simply stops sending it traffic, so users stay served. It turns a fragile single server into a resilient, expandable pool.