Today cloud cost management company Cloudyn announced a new free service for calculating costs of Amazon EC2 Reserved Instances. Reserved Instances are sort of like cloud instances that you pay a retainer for: you pay an upfront fee, and can then pay a discounted rate if/when you use them. Amazon offers Reserved Instances at different rates depending on term of commitment — either one, two or three years. Cloudyn’s Reserved Instance Calculator will use predictions based on usage patterns to recommend optimal purchases.




