EMR Fleet

• mix of spot and on-demand instances
• Provide a list of up to 5 instance types with corresponding weighted capacities and spot bid prices (including spot blocks)!
• EMR will automatically provision On-Demand and Spot capacity across these instance types when creating your cluster. This can make it easier and more cost effective to quickly obtain and maintain your desired capacity for your clusters.

EMR States

EMR Alarms, Metrics

https://docs.aws.amazon.com/emr/latest/ManagementGuide/UsingEMR_ViewingMetrics.html