Which solution meets these requirements?
Use EC2 instances in a single Availability Zone.
Use Amazon CloudFront as the database for the EC2 instances.
Use EC2 instances in the same edge location and the same Availability Zone.
Use EC2 instances in the same edge location and the same AWS Region.
Explanations:
Using EC2 instances in a single Availability Zone minimizes latency by ensuring that all instances are in close proximity to each other, reducing the time it takes for data to travel between them. Since high availability is not a requirement, this is an effective choice.
Amazon CloudFront is a content delivery network (CDN) designed for distributing content globally with low latency, but it is not suitable as a database for EC2 instances. It does not reduce latency between EC2 instances themselves and adds complexity without addressing the primary need for low-latency communication between instances.
While using EC2 instances in the same edge location would minimize latency, AWS edge locations are primarily used for services like CloudFront and are not where EC2 instances are deployed. EC2 instances are hosted in Availability Zones within Regions, making this option incorrect.
Using EC2 instances in the same edge location and the same AWS Region is not applicable since EC2 instances do not reside in edge locations. Additionally, while being in the same AWS Region is beneficial, the edge location reference makes this option misleading and incorrect in the context of minimizing latency between EC2 instances.
From what I’ve heard, the answer is:
Use EC2 instances in a single Availability Zone.