AWS Batch now supports specifying a minimum number of vCPUs (Min vCPUs) for Multi-Node Parallel (MNP) Jobs. MNP jobs allow users to run large-scale tightly coupled workloads, such as ML training, across multiple Amazon Elastic Compute Cloud (Amazon EC2) instances. With this launch, customers can now retain a specified number of vCPUs on a compute environment (CE) even when there are no jobs running. This feature enables customers to maintain a warm pool of healthy instances for MNP jobs, helping prevent situations where capacity is returned to EC2 due to rapid scale down.
Source:: Amazon AWS