What is the MOST efficient way to ensure users remain logged in?
Enable smart sessions on the load balancer and modify the application to check for an existing session.
Enable session sharing on the load balancer and modify the application to read from the session store.
Store user session information in an Amazon S3 bucket and modify the application to read session information from the bucket.
Modify the application to store user session information in an Amazon ElastiCache cluster.
Explanations:
Smart sessions are not a feature of Application Load Balancers. Additionally, modifying the application to check for existing sessions without a shared session store would not resolve the issue of session persistence across instances and deployments.
While session sharing is a good concept, the Application Load Balancer does not have a built-in session sharing feature. Simply modifying the application to read from a session store without an appropriate backend (like a database or cache) would not effectively ensure session persistence across multiple instances.
Storing session information in an Amazon S3 bucket is not practical for session management. S3 is not designed for real-time access needed for session data, leading to latency issues and potential data consistency problems during user interactions.
Storing user session information in an Amazon ElastiCache cluster (using Redis or Memcached) provides an in-memory store that supports fast read and write access. This allows the application to share session data across multiple instances and remain consistent even during scaling events and deployments, ensuring users remain logged in.
I structure that the answer is:
Modify the application to store user session information in an Amazon ElastiCache cluster.