With cas you can configure ecs to scale your asg automatically and just focus on running your tasks.
Aws ec2 container service autoscaling.
Ecs cluster auto scaling cas is a new capability for ecs to manage the scaling of ec2 auto scaling groups asg.
You ve always had the option to scale clusters automatically with amazon ec2 container service amazon ecs.
Now with the new service auto scaling feature and amazon cloudwatch alarms you can use scaling policies to scale ecs services.
For more information see the application auto scaling user guide.
Amazon ecs leverages the application auto scaling service to provide this functionality.
When creating an auto scaling group capacity provider with managed scaling enabled amazon ecs manages the scale in and scale out actions of the auto scaling group used when creating the capacity provider.
Automatic scaling is the ability to increase or decrease the desired count of tasks in your amazon ecs service automatically.
Ecs will ensure the asg scales in and out as needed with no further intervention required.
Ecs container service auto scaling.
Amazon ecs cluster auto scaling enables you to have more control over how you scale the amazon ec2 instances within a cluster.