DR Storage

Overview

Instance Store Volumes

• Attached with EC2 and no recovery in case of failure - temporary solution
• Fails when ..
  • hardware fails
  • AZ fails
  • EC2 host fails

EBS - Elastic Block Storage

• Runs in one AZ
• No replication of data from one AZ to another
• Fails when ..
  • AZ fails
• Snapshots of EBS volume can be stored in S3
  • but those snapshots can be used directly
  • restore by creating new volume in different AZ if required

S3

• Replication runs in 3 AZs

  • One Zone storage class does not replicate beyond one AZ but cheaper

• Snapshots stored in s3 gets regional resilience

• Snapshots shared and copy across multiple S3 buckets across multiple regions
  • Cross-Region Replication

EFS - Elastic File System

• Replicated accross multiple AZs
• mounted to Linux ec2
• Fails when..
  • Region fails