A company is migrating a single-server, on-premises web application to AWS. The company intends to use multiple servers behind an Elastic Load Balancer (ELB) to balance the load, and will also store session data in memory on the web server. The company does not want to lose that session data if a server fails or goes offline, and it wants to minimize user's downtime. Where should the company move session data to MOST effectively reduce downtime and make users' session data more fault tolerant?
A) An Amazon ElastiCache for Redis cluster
B) A second Amazon EBS volume
C) The web server's primary disk
D) An Amazon EC2 instance dedicated to session data

Question

Quizplus · Accepted Answer

Using Amazon ElastiCache for Redis allows session data to be stored in-memory across multiple nodes, providing high availability and fault tolerance. This minimizes downtime and ensures session data is not lost if a web server fails.

A Company Is Migrating a Single-Server, On-Premises Web Application to AWS