All about Sticky Sessions
Sticky Sessions A method used with Application Load Balancing, to achieve server-affinity. A router or load balancer with sticky-session support can assign a single server to a particular user, based on their HTTP session or IP address. The assigned server is remembered by the router for a certain amount of time, ensuring that all future requests for the same session are sent to the same server. To be effective, the router must remember the server selection for a time that is longer than the session timeout. Advantages Reasonably simple to implement for experienced network administrators. Reduces the need to implement session-failover, as users are only sent to other servers if one goes offline. Load balancer/router is often responsible for detecting offline servers, providing faster request-failover than round robin DNS-based load balancing. Disadvantages Difficult to set up for network administrators who are new to sticky ...