12-04 RI Attributes
RI Attributes (aka Instance Attributes) are limited based on Class Offering and can affect the final price of an RI instance. There are 4 RI Attributes:
1. Instance type: For example, m4.large. This is composed of the instance family (for example, m4) and the instance size (for example, large).
2. Region: The Region in which the Reserved Instance is purchased.
3. Tenancy: Whether your instance runs on shared (default) or single-tenant (dedicated) hardware.
4. Platform: The operating system eg. Windows or Linux/Unix.