Exam AWS Certified Solutions Architect - Professional topic 1 question 90 discussion

A. Serve user content from S3. CloudFront and use Route53 latency-based routing between ELBs in each region Retrieve user preferences from a local DynamoDB table in each region and leverage SQS to capture changes to user preferences with SOS workers for propagating updates to each table.

Advantages of option A: a. High availability: By leveraging multiple regions and latency-based routing, the application can provide high availability and improved performance for users across different locations. b. Low latency: Serving user content through CloudFront and using local DynamoDB tables for user preferences ensures low-latency access, providing a responsive user experience. c. Scalability: The architecture can scale horizontally by adding more ELBs in each region and leveraging the scalability of DynamoDB and SQS to handle increasing traffic and user demand. d. Cost-effective: Storing user content in S3 and utilizing DynamoDB for user preferences can provide a cost-effective solution compared to managing infrastructure and databases in multiple regions. In conclusion, option A is the recommended choice for providing a highly available design for the social media site, leveraging multiple regions, and addressing the latency-sensitive requirements while maintaining cost efficiency.

SNS and SWF are not fit into this scenario, so B and D can be eliminated first. C With 'S3 copy API to multiple regions', which is not necessary with CloudFront, it is less preferred than A. So I select A.

A. Serve user content from S3. CloudFront and use Route53 latency-based routing between ELBs in each region Retrieve user preferences from a local DynamoDB table in each region and leverage SQS to capture changes to user preferences with SOS workers for propagating updates to each table.

A is the answer