terhelésosztó

Terhelésosztó, which translates to "load balancer" in English, is a device or software that distributes network or application traffic across multiple servers. This process ensures that no single server bears too much demand, preventing any one server from becoming a point of failure. Load balancers are crucial for maintaining high availability and reliability of applications, especially in large-scale environments.

The primary function of a terhelésosztó is to distribute incoming requests evenly across a pool of servers, often referred to as a server farm or server cluster. This distribution can be based on various algorithms, such as round robin, least connections, or IP hash. By spreading the load, the system can handle more traffic than a single server could manage alone, improving overall performance and responsiveness.

Load balancers can operate at different levels of the network stack, including the transport layer (Layer 4) and the application layer (Layer 7). Layer 4 load balancers distribute traffic based on IP and port information, while Layer 7 load balancers can make more sophisticated decisions based on the content of the requests, such as HTTP headers or cookies.

In addition to distributing traffic, terhelésosztók often provide other features such as health checks, which monitor the status of servers and remove unhealthy ones from the pool, and SSL termination, which offloads the computational burden of encrypting and decrypting SSL traffic from the servers.

Overall, terhelésosztók are essential components in modern network architectures, enabling systems to scale efficiently and provide a seamless user experience even under heavy loads.