An f5 load balancer improves server performance by splitting incoming requests from users between two or more servers. This reduces the load on each server and increases the number of users that can be served and the reliability of applications.
A load balancer usually sits between end users and the services they are trying to use. Several back-end servers are configured to offer the same service, and the load balancer is configured to accept service requests. A client sends a request for a service to the load balancer, and the load balancer then forwards the request to one of the back-end servers. The back-end server handling the request sends a response back to the load balancer, which then sends the response back to the client.
The load balancer decides which back-end server to send each request to by using an algorithm that has been configured for each service.The simplest method of choosing a back-end server is to consult a list of available servers and send each incoming request to the next server in the list. Other methods include the number of connections each server is currently handling and the response time of each server. In some cases, it is important that a client remain connected to the same back-end server once a session has been established. The load balancer keeps track of these sessions and ensures communication between the client and server is uninterrupted.