Amazon EMR uses real-time capacity insights to provision spot instances to lower cost and interruption
Amazon EMR introduces now offers “Capacity Optimized” allocation strategy for provisioning Spot Instances in an Amazon EMR cluster. The “Capacity Optimized” allocation strategy automatically makes the most efficient use of available spare capacity while still taking advantage of the steep discounts offered by Spot Instances. By offering the possibility of fewer interruptions, the capacity-optimized strategy can lower the overall cost of your workload.
Source:: Amazon AWS