AWS 將本來 EC2 的 Spot Fleet 加上了 EC2 Fleet，計算的公式從本來只有 Spot Instace，變成把標準 EC2 Instance 與 RI 的計算全部都納進來：「EC2 Fleet – Manage Thousands of On-Demand and Spot Instances with One Request」。
Today we are extending and generalizing the set-it-and-forget-it model that we pioneered in Spot Fleet with EC2 Fleet, a new building block that gives you the ability to create fleets that are composed of a combination of EC2 On-Demand, Reserved, and Spot Instances with a single API call.
不過目前有些服務還沒整，主要是跟 auto scaling 有關的部份，這部份應該是一次上一大包：
We plan to connect EC2 Fleet and EC2 Auto Scaling groups. This will let you create a single fleet that mixed instance types and Spot, Reserved and On-Demand, while also taking advantage of EC2 Auto Scaling features such as health checks and lifecycle hooks. This integration will also bring EC2 Fleet functionality to services such as Amazon ECS, Amazon EKS, and AWS Batch that build on and make use of EC2 Auto Scaling for fleet management.