Which solution will meet these requirements?
Change the launch configuration to use a larger instance size.
Increase the minimum number of instances in the Auto Scaling group.
Add a predictive scaling policy to the Auto Scaling group.
Add a warm pool to the Auto Scaling group.
Explanations:
Changing the launch configuration to a larger instance size may improve performance but does not directly address the issue of long-running boot scripts. It may also lead to overprovisioning and higher costs without ensuring quicker scale-out.
Increasing the minimum number of instances would not reduce the time for scale-out actions; it simply maintains a higher number of running instances, which could lead to overprovisioning and unnecessary costs.
A predictive scaling policy anticipates future scaling needs based on historical data but does not reduce the boot time for instances that are launched. It may help in proactive scaling but does not directly address the long-running scripts during boot.
Adding a warm pool to the Auto Scaling group allows for pre-initialized instances that are ready to take traffic quickly. This setup significantly reduces the time needed for scale-out actions, as instances in the warm pool can be quickly moved to the active state without going through the long boot process.
If I’m correct, the answer is:
Add a warm pool to the Auto Scaling group.