Sticky Sessions
Sticky sessions, also known as session affinity, is a load balancing technique that ensures a user's requests are consistently directed to the same backend server during a session. This is crucial for maintaining stateful data, such as user login information or shopping cart contents, across multiple requests in distributed systems. It prevents session data loss or inconsistencies that can occur when requests are randomly distributed among servers.
Developers should implement sticky sessions when building applications that rely on server-side session storage, such as e-commerce platforms, banking apps, or any service requiring user authentication and state persistence. It is essential in scenarios where session data is not shared across servers (e.g., using in-memory storage instead of a centralized database), ensuring a seamless user experience by avoiding repeated logins or data corruption.