ASGs Flashcards

1
Q

What does ASG stand for?

A

Auto-Scaling Group

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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
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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
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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)

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