After buying EC2 Reserved Instances for a web tier, operations asks whether some RI attributes can apply across sizes in the same instance family. What awareness is correct at Cloud Practitioner depth?
Select an answer to reveal the explanation.
Short Explanation
Some RIs are stretchier than others — within a family, size flexibility can let the discount cover a cousin instance size instead of one frozen shape. They still apply to EC2 On-Demand-style usage patterns they match, not to Spot-only worlds or S3 API nickels.
Full Explanation
Certain EC2 Reserved Instances include flexibility attributes, such as instance size flexibility within the same family (for applicable Linux/Unix shared configurations), so the benefit can normalize across sizes. RIs are not limited to Spot, do not discount S3 API calls, and do not become inert after purchase when matching usage exists.