Hi in answer F to Challenge No 2 it mentions that there is no cool down period for Step Scaling but I’ve gone through the AWS documentation and couldn’t find anywhere which specifically mentioned this. Is there anywhere (link) that goes through this in more detail?
Here’s a link to the documentation on the topic. Read the last paragraph under the section "Simple Scaling Policies and Cooldown Periods".
"Amazon EC2 Auto Scaling does not support cooldown periods for step scaling policies. Therefore, you can’t specify a cooldown period for these policies and the default cooldown period for the group doesn’t apply."
Cooldown is only supported by Simple policy. Target tracking and Step policies instead support warm-up period.
The concept is a bit different. With Cooldown, you need to wait an amount of time before another autoscaling event can happen. With warm-up, you need to wait before the new instances are considered into the target metric (which implies that another autoscaling event can happen in the meantime).
Looks like step scaling now allows cool down period. It might be a good to update content on this challenge video: https://acloud.guru/course/aws-certified-solutions-architect-professional/learn/a2e7b986-36cb-1a8a-7429-d105246dda1e/953f8962-ee2d-5646-ba71-e29910118644/watch