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Answer: Set up an Auto Scaling group and load balancer in the new Region, use a global DynamoDB table, and implement DNS failover for the load balancer.
Option A is correct because it sets up the necessary infrastructure in the disaster recovery region beforehand, ensuring a swift switch with minimal downtime. By configuring an Auto Scaling group and load balancer in the new region and using a global DynamoDB table, the application can maintain consistency across regions. DNS failover helps to quickly redirect traffic to the new region's load balancer. This approach preemptively prepares for failover, reducing downtime compared to deploying resources only when needed as suggested in other options.
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How can a solutions architect ensure minimal downtime when making an AWS-hosted application available in another Region?
A
Set up an Auto Scaling group and load balancer in the new Region, use a global DynamoDB table, and implement DNS failover for the load balancer.
B
Develop a CloudFormation template for on-demand launch of EC2 instances, load balancers, and DynamoDB tables, and set up DNS failover for the load balancer.
C
Prepare a CloudFormation template for EC2 instances and a load balancer, use a global DynamoDB table, and establish DNS failover for the load balancer.
D
Deploy an Auto Scaling group and load balancer in the new Region, enable a global DynamoDB table, and use a CloudWatch alarm to trigger a Lambda function for Route 53 updates.