Electronic Block Store

Question 1

EBS Volume (Elastic Block Store)

Answer 1

Network drive attached to instances while running
* Persist data, even after termination
* Mounted to one instance at a time
* Bound to an availability zone
* Uses the network to communicate, may be latency
* Can be detached and re-attached to another quickly

Question 2

EBS Volume - Availability Zone

Answer 2

• Cannot be attached across AZ
• To move you must first take a snapshot

Question 3

EBS Volume - Capacity

Answer 3

• Provision Capacity in GB and IOPs in advance
• Billed for all provisioned capacity
• Can increase capacity over time

Question 4

EBS - Delete on Termination Attribute

Answer 4

Controls the EBS behavior when an EC2 instance terminates
* On by default for root
* Off by default for any other EBS

Use case: to preserve data or save storage space

Question 5

EBS Snapshots

Answer 5

• Make a backup at any time
• Not necessary to detach volume, but recommended
• Can copy across AZ or Region

Question 6

EBS Snapshot Features

Answer 6

• EBS Snapshot Archive
• Recycle Bin for EBS Snapshots

Question 7

EBS - Snapshot Archive

Answer 7

• Archive tier that is 75% cheaper
• Takes 24 to 72 hr to restore

Question 8

Recycle Bin for EBS Snapshots

Answer 8

• Setup rules to retain deleted snapshots, can recover after an accidental deletion
• Specify retention period 1 day to 1 year