AWS SAA (Solution Architect Associate)

Instance

Snapshot

Auto Scaling Group

Dynamic scaling policy

Simple scaling

• Based on CloudWatch alarm.
• Choose 1 action to conduct.
• Scale-in operation depends on CloudWatch alarm.

Target tracking policy

• Based on CloudWatch & built-in metrics (i.e Averge CPU Utilization). CloudWatch metrics must be available or defined.
• Scale (in/out) operations trigger by calculating the current resources utilization that matches the defined target metric.
• Faster scale-in operation.

Step scaling

• It is a Simple scaling with various actions.
• Apply multiple actions for a scaling events.
• Allow scaling operation more smoothly and optimized.