Load Balancer - Apache

In the modern landscape of high-traffic web applications, a single server is rarely sufficient to handle the demands of thousands of concurrent users. To ensure reliability, scalability, and performance, organizations rely on load balancing—the process of distributing incoming network traffic across a group of backend servers. The Apache HTTP Server, traditionally known as a web server, has evolved into a robust, enterprise-grade load balancing solution through its mod_proxy modules.

An intelligent approach that sends new requests to the server with the fewest active connections, preventing any single node from becoming a bottleneck. Reliability and Session Persistence apache load balancer

A critical challenge in load balancing is "session persistence" or "sticky sessions." In many applications, such as e-commerce or secure portals, a user’s session data is stored locally on a specific backend server. If a load balancer moves a user to a different server mid-session, the user may be logged out or lose their progress. Apache solves this using the stickysession parameter, which utilizes cookies or URL encoding to ensure a user remains paired with the same backend worker for the duration of their visit. In the modern landscape of high-traffic web applications,