Session persistence ensures that a client will remain connected to the same server throughout a session or period of time. By directing requests to the same server-for example, where information is already cached or where information likely to be requested based on existing patterns is already being stored-the load balancer ensures the most efficient possible performance. Some load balancers can instead achieve session persistence. ![]() However, standard load balancing algorithms can direct user requests to unique backend or application servers each time. This means the server is supporting many users at once, and performance can be a problem.Ī load balancer can sit in front of the site’s server group to manage where user requests go. Session Persistence (sometimes called sticky sessions) involves directing a user’s requests to one application or backend web server for the duration of a “session.” The session is the time it takes a user to complete a transaction or task that might include multiple requests.Īs users browse high-traffic websites, they each request information from various backend servers, often using standard http protocols. << Back to Technical Glossary Session Persistence Definition
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