Questions
8 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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08 / 08

How to set up each scaling policy, and what are the parameters

Setting up Scaling Policies

Scaling policies are configured by defining the trigger metric and the action to be taken when a threshold is met.

Policy Parameters
  1. 1

    Target Tracking: Requires a target metric value (e.g., 50% CPU). The ASG automatically calculates the adjustments needed.

  2. 2

    Step Scaling: Requires an alarm threshold, an adjustment type (change/percent), and a cooldown period to prevent thrashing.

  3. 3

    Scheduled Scaling: Requires a cron expression or specific time, and the new capacity value (Min, Max, Desired).