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Read this before purchasing reserved instances
Reserved Instances provide you with significant savings on your Amazon EC2 costs compared to On-Demand Instance pricing. Reserved Instances are not physical instances, but rather a billing discount applied to the use of On-Demand Instances in your account.
Reserved Instance is definitely a good option if your service will run for at least 1 year. It will save the cloud cost up to 72% based on the purchase option and region. You can leverage the organization (consolidated bill) to get the RI (Reserved Instance) discount applying to accounts in an organization’s consolidated billing family.
The purchasing option is also flexible in choosing instance type and payment option.
Looks there’s no reason why we can’t go with this option. However please question your company before buying reserved instances.
- Do your services run 24 hours x 7 days?
- Do you keep the same size of the virtual machine? (change your EC2 instance types & size)?
- Do you expect your database in the same regions?
- Does your volume of the infrastructure will go the same or up?
If your answer is No, you need to consider not buying it.
