Chapter 7.4 - EC2 Hibernation

Question 1

What is EC2 Hibernation?

Answer 1

Hibernating an EC2 instance tells the operating system to perform hibernation aka suspend-to-disk)

Hibernation saves the contents from the instance memory (RAM) to the associated Amazon EBS volume.

The instance’s Amazon EBS root and attached data volumes persist.

Question 2

What are the benefits o starting an EC2 instance out of hibernation?

Answer 2

The instance boots much faster.

The operating system does not need to reboot because the in-memory state (RAM) is preserved.

This is useful for:

• Long-running processes
• Services that take time to initialize

Question 3

What are the limitations of EC2 Hibernation?

Answer 3

Instance RAM must be less than 150 GB.

Instance families include: C3, C4, C5, M3, M4, M5, R3, R4, R5

Available for Windows, Amazon Linux 2 AMI, and Ubuntu

Instances can’t be hibernated for more than 60 days.

Available for On-Demand instances and Reserved Instances