Hibernate

• When you hibernate an instance, EC2 signals the operating system to perform hibernation (suspend-to-disk).

• Hibernation saves the contents from the instance memory (RAM) to your Amazon EBS root volume.

• EC2 persists the instance's EBS root volume and any attached EBS data volumes.

• When you start your instance:

  • The EBS root volume is restored to its previous state.

  • The RAM contents are reloaded.

  • The processes that were previously running on the instance are resumed.

  • Previously attached data volumes are reattached and the instance retains its instance ID.

• It can be useful for long-running applications, which need to save the RAM state or services which take a lot of time to initialise.

Limitations

• Supported instance families:

  • C3, C4, C5

  • I3

  • M3, M4, M5, M5a, M5ad

  • R3, R4, R5, R5a, R5ad

  • T2, T3, T3a

• Instance RAM:

  • RAM size must be less than 150 GB.

• Instance size:

  • It is not supported for bare metal instances.