SOA-C03 · Question #137
A company runs an application on Amazon EC2 instances that are in an Amazon EC2 Auto Scaling group. Scale-out actions take a long time to become complete because of long-running boot scripts. A…
The correct answer is D. Add a warm pool to the Auto Scaling group. An Auto Scaling warm pool keeps a set of pre-initialized EC2 instances in a “stopped” or “running” state, ready to be quickly added to the active instance pool when scaling out. This significantly reduces scale-out latency caused by lengthy boot scripts, without permanently…
Question
A company runs an application on Amazon EC2 instances that are in an Amazon EC2 Auto Scaling group. Scale-out actions take a long time to become complete because of long-running boot scripts. A CloudOps engineer must implement a solution to reduce the required time for scale-out actions without overprovisioning the Auto Scaling group. Which solution will meet these requirements?
Options
- AChange the launch configuration to use a larger instance size.
- BIncrease the minimum number of instances in the Auto Scaling group.
- CAdd a predictive scaling policy to the Auto Scaling group.
- DAdd a warm pool to the Auto Scaling group.
How the community answered
(40 responses)- A10% (4)
- B8% (3)
- C3% (1)
- D80% (32)
Explanation
An Auto Scaling warm pool keeps a set of pre-initialized EC2 instances in a “stopped” or “running” state, ready to be quickly added to the active instance pool when scaling out. This significantly reduces scale-out latency caused by lengthy boot scripts, without permanently running extra instances (avoiding overprovisioning). Once demand increases, instances from the warm pool can be launched almost instantly.
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