Load balancing is the process of distributing network traffic across multiple servers. This ensures that no single server is overloaded with requests and improves the overall performance of the network. There are many different algorithms that can be used for load balancing, and the choice of algorithm depends on the specific needs of the network. Some of the more popular algorithms include round-robin, least-connections, and least-cost.
- Round-robin is the simplest load-balancing algorithm and works by sending each new request to the next server in a list. This ensures that all servers receive an equal number of requests but can lead to uneven distribution if some servers are faster than others.
- Least-connections is a more sophisticated algorithm that sends new requests to the server with the fewest active connections. This ensures that all servers are used evenly and prevents any one server from becoming overloaded.
- Least-cost is an algorithm that considers the different costs of each server (such as CPU, memory, and bandwidth). It then sends new requests to the server that will cost the least to process. This can be useful in situations where some servers are more expensive to use than others.