You can create an EC2 Fleet specification defining target capacity, which EC2 instance types work for you, and how much of your fleet should be filled using On-Demand, RI and Spot purchase models. You can also indicate whether EC2 Fleet should take into account the number of cores and amount of memory on each instance or consider all instances equal when scaling. EC2 Fleet then launches the lowest price combination of instances to meet the target capacity based on these preferences. EC2 fleet enables you to use multiple instance types and purchase models to provision capacity cost effectively, with just a few clicks in the AWS Management Console.
Amazon EC2 Fleet is now available in all public Regions. To learn more about simplifying the provisioning of Amazon EC2 capacity across different Amazon EC2 instance types, AWS Availability Zones and across On-Demand, RI and Spot purchase models using Amazon EC2 Fleet, visit this blog. To learn more about Amazon EC2 pricing models, visit this page.