ASGs Flashcards
1
Q
What does ASG stand for?
A
Auto-Scaling Group
2
Q
What are the different scaling options for ASGs?
A
- Maintain current instance levels at all times
- Scale manually
- Scale based on a schedule
- Scale based on demand
- Use predictive scaling
3
Q
What is the difference between scaling out and scaling up?
A
- Scale Out = More stuff (e.g. more EC2 instances in an ASG), for better parallelism or for HA
- Scale Up = Better stuff (e.g. upgraded EC2 instances) for better performance
4
Q
In the context of ASGs, what is a Lifecycle hook?
A
Lifecycle hooks enable you to perform custom actions by pausing instances as an Auto Scaling group launches or terminates them.
(Source: https://docs.aws.amazon.com/autoscaling/ec2/userguide/lifecycle-hooks.html)