Questions
2 of 8
1What is an Auto Scaling Group (ASG) and how does it work in EC2?
2Explain the difference between desired, minimum, and maximum capacity.
3What are the different ASG Scaling Policies?
4What are good metrics to scale on?
5What is Amazon CloudWatch and how is it used with EC2?
6Discuss Auto Scaling Group attributes
7How to create an Auto Scaling Group
8How to set up each scaling policy, and what are the parameters
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02 / 08

Explain the difference between desired, minimum, and maximum capacity.

ASG Capacity Attributes

These three settings define the boundaries within which the Auto Scaling Group operates. They ensure that your application has enough resources without exceeding your budget.

Capacity Definitions
  1. 1

    Minimum Capacity: The floor value; ASG will never terminate instances below this number even if load is zero.

  2. 2

    Maximum Capacity: The ceiling value; ASG will never scale out beyond this number, protecting you from runaway costs.

  3. 3

    Desired Capacity: The number of instances the ASG attempts to maintain at any given time. Scaling policies update this value.