https://imgproxy.net/blog/aws-ecs-ec2-warm-pool/
AWS ECS, EC2, and Warm Pools: advantages and gotchas | imgproxy Blog
A guide to using AWS Elastic Container Service (ECS) with EC2 instances and warm pools
aws ecswarm poolsec2
https://runs-on.com/runners/pools/
Warm pools - RunsOn
warm pools