AWS Cloud

AWS Disaster Recovery and Fail-over

In this article, you will know which all AWS services can be used in AWS Disaster Recovery and Fail-over

Recovery time objective [RTO]

The acceptable amount of time it takes to restore the application to the business process service level.

Recovery Point Objective [RPO]

The acceptable amount of data that can be lost due to the failure as it is measured in time.

AWS Service that can be used for backup and disaster recovery:- [ AWS Disaster Recovery and Fail-over ]

  1. S3 (Simple Storage Service): lifecycle policies, versioning, MFA and eleven nines durability (99.9999999) make this a perfect backup solution.
  2. Glacier: It provider low-cost storage for long-term
  3. EBS:
    • Durable point-in-time snapshot stored on the s3 standard storage type
    • Ability to copy a snapshot to a new region and launch a new volume (good for preparing your disaster recovery methods)
    • EBS Volumes are replicated across multiple servers in the same availability zone for durability
  4. AWS Import/Export:
    • Copy a large amount of data to AWS to prepare for a disaster recovery solution
    • Send physical storage devices for archival/storage as a backup solution.
  5. AWS Storage Gateway:
    • Gateway-cached volumes
      • Store the data on s3 with versioning enabled as a backup and cache frequently accessed objects on-premise
    • Gateway-stored volumes
      • Inexpensive offsite backups by creating point-in-time snapshots of data on the storage gateway to S3.
  1. EC2 (Elastic Cloud Compute):
    • Copy ami’s to different AWS regions which can be spun up in the event of a disaster.
    • Use multiple availability zones to design for fault-tolerance and failure
    • Route 53 to failover to the backup environment in another region.
  2. Route 53:
    • Can be used to failover from on-premise to AWS or from one AWS region to another
    • Failover routing and weighted routing (for migrating applications)
    • Allocate DNS ahead of time to prepare for potential failover
  3. ELB (Elastic Load Balancer):
    • Pre-allocate the load balancer for the backup environment to receive the cname (DNS name) this allows for setting up Route53 recordset.

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