Sticky session what is

These two perform separately from each other, meaning that they are balanced independently. Focusing on web server nodes, it is not possible to direct every user request to a server node with the least amount of load dynamically. However, it all will be initially load-balanced, meaning that this is not a problem to begin with. So, should you enable sticky sessions in your web application load balancer? With it, you can ensure that your web server nodes are balanced to allow your users to enjoy the best user experience.

To learn more about our load balancing software and how sticky sessions can be configured to benefit your business, contact us today. Now, here comes the role of sticky-session. If the load balancer is instructed to use sticky sessions, all of your interactions will happen with the same physical server, even though other servers are present.

Thus, your session object will be the same throughout your entire interaction with this website. To summarize, In case of Sticky Sessions, all your requests will be directed to the same physical web server while in case of a non-sticky load balancer may choose any webserver to serve your requests. When you use loadbalancing it means you have several instances of tomcat and you need to divide loads.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 9 years, 6 months ago. Active 2 months ago. Viewed k times. What I understood after reading from internet: Sticky : only single session object will be there. Non-sticky session : session object for each server node. Improve this question. Lemmy 2, 1 1 gold badge 18 18 silver badges 28 28 bronze badges.

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Improve this answer. You have selected Weighted round robin for Load Balancing Algorithm. Source IP address : The source IP address of each request is calculated using the consistent hashing algorithm to obtain a unique hash key, and all backend servers are numbered. The system allocates the client to a particular server based on the generated key. This enables requests from different clients to be routed and ensures that a client is directed to the same server that it was using previously.

Dedicated load balancers support two types of sticky sessions: Source IP address and Load balancer cookie. Shared load balancers support three types of sticky session, including Source IP address , Load balancer cookie , and Application cookie. Classic load balancers support Source IP address. You can also configure sticky sessions when adding a listener or creating a backend server group. Last Article: Load Balancing Algorithms.

Next Article: Access Control. Thank you for your feedback. Some of the user information might not persist, and can cause data loss. In this scenario, the load balancer should send all requests from a particular user session to be processed on the same server. Doing so is referred to as session stickiness , or session persistence.

More efficient use of data and memory. Similarly, data stored in a RAM cache can be looked up once and reused. Implementing sticky sessions on a load balancer does not require any changes to your application. Limits your application scalability as the load balancer cannot distribute the load evenly each time it receives a request from a client. If the server goes down, then the session is lost. If the session has important user information, it can be lost.

The popular open-source web server, NGINX , can be used as a load balancer to support your web services. NGINX provides extensive documentation to get you started installing and configuring it to load balance traffic to backend servers.

Linode offers a load balancing service called NodeBalancers.