Which solution will meet these requirements?
Launch an Amazon ElastiCache cluster to cache common database queries.
Launch an Amazon CloudFront web distribution to cache commonly requested website content.
Enable disk-based caching on the EC2 instances to cache commonly requested website content.
Deploy a reverse proxy into the design using an EC2 instance with caching enabled for commonly requested website content.
Explanations:
While launching an Amazon ElastiCache cluster can help reduce database load by caching common queries, it does not directly address the caching of web content, which is crucial for improving website performance under increased demand.
Deploying an Amazon CloudFront web distribution effectively caches commonly requested website content at edge locations around the world, reducing latency and load on the origin servers. This solution optimizes performance and can handle increased traffic without requiring additional EC2 instances.
Enabling disk-based caching on the EC2 instances does provide some performance improvement, but it does not effectively scale with increased demand from users globally, nor does it address latency issues as well as a dedicated caching solution like CloudFront would.
Deploying a reverse proxy with caching on an EC2 instance adds complexity and could become a single point of failure. It may not effectively handle a significant increase in traffic as well as a global content delivery network like CloudFront.
I think the answer is:
Launch an Amazon CloudFront web distribution to cache commonly requested website content.