Scaling - Introduction & Concepts

Question 1

What is horizontal scaling?

Answer 1

adding more instances as demand increases, no downtime, automatic use of Auto-scaling groups; theoretically unlimited

Question 2

What is vertical scaling?

Answer 2

adding more CPU or RAM to existing instance as demand increases, require downtime due to restart, would require scripting to automate; limited by instance size

Question 3

What is scaling out?

Answer 3

adding an instance

Question 4

What is scaling up

Answer 4

adding resources to an existing instance

Question 5

What is scaling in?

Answer 5

removing an instance

Question 6

What is scaling down

Answer 6

removing resources from an existing instance