A company runs an application on Amazon EC2 instances in an Auto Scaling group behind an Elastic Load Balancing (ELB) load balancer. The application uses an Amazon DynamoDB table. For disaster recovery, the company wants the application to be available from another AWS Region with minimal downtime. Which solution provides the LEAST downtime?
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Correct answer: Create an Auto Scaling group and an ELB in the DR Region. Configure the DynamoDB table as a global table. Configure DNS failover to point to the new DR Region's ELB..
Why this is the answer
The correct solution provides the least downtime because it establishes a fully provisioned, active-passive disaster recovery (DR) environment. By having the Auto Scaling group and ELB pre-created in the DR Region, and DynamoDB configured as a global table for automatic data replication, the application can be brought online quickly. DNS failover, typically managed by Route 53, allows for rapid redirection of traffic to the DR Region's ELB.
The other options introduce delays. Creating resources via CloudFormation templates when necessary means waiting for provisioning