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New – Instance Size Flexibility for EC2 Reserved Instances

Reserved Instances allow AWS customers to receive a significant discount on their EC2 usage (up to 75% when compared to On-Demand pricing), along with capacity reservation when the RIs are purchased for use in a specific Availability Zone (AZ).
Late last year we made Reserved Instances more flexible with the launch of Regional RIs that apply the discount to any AZ in the Region, along with Convertible RIs that allow you to change the instance family and other parameters associated with a Reserved Instance. Both types of RIs reduce your management overhead and provide you with additional options. When you use Regional RIs you can launch an instance without having to worry about launching in the AZ that is eligible for the RI discount. When you use Convertible RIs you can ensure that your RIs remain well-fitted to your usage, even as your choice of instance types and sizes varies


 

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