All topicsTopic 07 / 24
Beginner 1 minute
Load Balancing
A load balancer sits between clients and a pool of application servers. It chooses where each request should go using rules such as round robin, least connections, or health checks. This prevents one server from becoming a hotspot and lets operators add or remove instances without changing the public address. It is a traffic director, not a replacement for capacity planning.
Key idea
One stable entry point can spread work and stop sending traffic to unhealthy instances.
See it in one picture
Follow the arrowsUsers
Load balancer
Server A
Server B
Traffic gets shared
Real-world example
When a shopping site adds servers for a sale, the load balancer sends new browser requests across the pool. If one server fails its health check, it is removed from rotation.
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