Questions
3 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
AWS-EC2AWS-EC2
Basics
Instance
EC2 instance store
Amazon Machine Images
Connecting
Networking
EBS
EFS
Elastic Network Interfaces
Elastic Load Balancing
Spot Instances
Placement Groups
EC2 Hibernate
Purchasing Options
Security
Scaling
Availability
03 / 08

What are the different ASG Scaling Policies?

Types of Scaling Policies

Scaling policies determine when and how the ASG should adjust capacity. They can be reactive (Dynamic) or proactive (Scheduled/Predictive).

Policy Breakdown
  1. 1

    Target Tracking: Keeps a specific metric (e.g., CPU) at a target value (e.g., 50%).

  2. 2

    Simple/Step Scaling: Adds/removes a specific number of instances based on CloudWatch alarm thresholds.

  3. 3

    Scheduled Scaling: Scales based on known time-based patterns (e.g., Fridays at 5 PM).

  4. 4

    Predictive Scaling: Uses machine learning to forecast traffic and scale ahead of time.

  5. 5

    Dynamic Scaling: A broad term for policies that respond to changing conditions in real-time.