I want to purchase an Amazon Elastic Compute Cloud (Amazon EC2) Reserved Instance (RI) that provides the Regional benefit or that's size-flexible.
Resolution
All Amazon EC2 RIs that are size-flexible also provide the Regional benefit, but the reverse isn't always true.
For an RI to provide the Regional benefit, the following must be true:
- It must be a Standard or Convertible RI.
- It must be in the active state.
- It must not be tied to a specific Availability Zone.
For an RI to be size-flexible:
- It must meet the Regional benefit criteria.
- It must have a platform value of Linux/UNIX.
- It must not be a G4ad, G4dn, G5, G5g, or Inf1 instance.
- It must not have a dedicated tenancy.
- It must not be tied to a specific Availability Zone.
An RI that provides the Regional benefit applies to any instance in that Region that matches the specifications of the RI.
An RI that's size-flexible applies all or part of its pricing benefit to any instance in the same instance family, regardless of Availability Zone or size.
For example, an RI that's size-flexible for a c4.large instance applies to either a c4.large instance or two c4.medium instances. In the same way, two c4.medium instances can also be applied to usage for a c4.large instance.
Related information
Reserved Instances
How Reserved Instances are applied
Types of Reserved Instances (offering classes)