EBS & EFS

Question 1

EBS

Answer 1

Elastic Block Storage is a network drive that allows you to persist data for your instances

• locked to one AZ
• billed based on provisioned capacity

Question 2

EBS Volume Types

Answer 2

GP2 (SSD) - general (recommended)
IOI (SSD) - high performance (databases)
STI (HDD) - Low cost (Big data/log processing)
SCI (HDD) - Lowest cost

Question 3

EBS snapshots

Answer 3

Uses IO of your EBS
- migrating to a different AZ/region requires taking the snapshot, copying the volume to the different region, then creating volume from the snapshot in the AZ

Question 4

ECS Encryption

Answer 4

• Data at rest is encrypted inside the volume
• All the data in flight moving between the instance and the volume is encrypted • All snapshots are encrypted
• All volumes created from the snapshot

Question 5

Instance Store

Answer 5

Physical drive instead of a network drive (i.e. EBS)

• Better I/O
• On termination, instance store is lost

Question 6

EBS RAID 0

Answer 6

Combining 2 or more volumes and getting the total disk space and I/O

Question 7

EBS RAID 1

Answer 7

Mirroring a volume to another

Question 8

EFS

Answer 8

Elastic File System - managed network file system (multi AZ)

Use cases: CMS