An EC2 workload will run for three years, but its instance family might change.
Flexibility during the commitment matters more than the maximum discount.
Which Reserved Instance type is appropriate?
Convertible RIs trade some potential discount for the ability to exchange into another qualifying Convertible RI configuration.
Detailed explanation
A Standard RI can offer a larger discount but is less flexible to exchange than a Convertible RI.
A Standard RI can offer a larger discount but is less flexible to exchange than a Convertible RI.
This reserves capacity and is not a Reserved Instance type that provides exchange flexibility.
This reserves capacity and is not a Reserved Instance type that provides exchange flexibility.
It can be exchanged for another qualifying Convertible RI and better supports future configuration changes.
It can be exchanged for another qualifying Convertible RI and better supports future configuration changes.
Spot is interruptible spare capacity, not a type of Reserved Instance with exchange flexibility.
Spot is interruptible spare capacity, not a type of Reserved Instance with exchange flexibility.
Check official documentation
Compare the following points with the official documentation.
EC2 Reserved InstancesのStandardとConvertibleの公式比較を確認する。
Official references
What to confirm
割引率と変更柔軟性のトレードオフを説明できる。
Key points
- Convertible RI
- Exchange
- Standard RI
Notes
- Environment:
- Pricing and conditions can change. Check the current AWS pricing page for the service and Region before implementation.
Foundation review
Discount and flexibility
Choose between configuration stability and future change requirements.
Billing benefit
An RI is a billing benefit applied to qualifying usage rather than a dedicated physical instance.