Which solution will meet these requirements MOST cost-effectively?

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In: SAA-C03
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An online gaming company is transitioning user data storage to Amazon DynamoDB to support the company’s growing user base.The current architecture includes DynamoDB tables that contain user profiles, achievements, and in-game transactions.The company needs to design a robust, continuously available, and resilient DynamoDB architecture to maintain a seamless gaming experience for users.

Which solution will meet these requirements MOST cost-effectively?

Create DynamoDB tables in a single AWS Region. Use on-demand capacity mode. Use global tables to replicate data across multiple Regions.

Use DynamoDB Accelerator (DAX) to cache frequently accessed data. Deploy tables in a single AWS Region and enable auto scaling. Configure Cross-Region Replication manually to additional Regions.

Create DynamoDB tables in multiple AWS Regions. Use on-demand capacity mode. Use DynamoDB Streams for Cross-Region Replication between Regions.

Use DynamoDB global tables for automatic multi-Region replication. Deploy tables in multiple AWS Regions. Use provisioned capacity mode. Enable auto scaling.

Explanations:

While creating DynamoDB tables in a single region and using global tables for replication would provide multi-region data availability, it does not offer the most cost-effective solution because it relies on on-demand capacity mode which can lead to higher costs with fluctuating traffic.

This option suggests using DAX for caching, which can improve performance but does not inherently provide multi-region availability. Additionally, manually configuring Cross-Region Replication increases complexity and potential for errors, making it less cost-effective compared to automated solutions.

Creating tables in multiple regions using on-demand capacity mode offers resilience but lacks the automation and cost-efficiency of global tables. Cross-Region Replication via DynamoDB Streams is also more complex and potentially more costly than global tables.

Using DynamoDB global tables allows for automatic multi-Region replication, ensuring high availability and resilience. Deploying tables in multiple regions with provisioned capacity mode and enabling auto scaling strikes a balance between performance and cost, making it the most efficient solution.

2026-03-23

2 Comments

  1. Carl
    Author

    If I’m not mistaken, the answer is:
    Use DynamoDB global tables for automatic multi-Region replication. Deploy tables in multiple AWS Regions. Use provisioned capacity mode. Enable auto scaling.

  2. Susan
    Author

    As I understand it, the answer is:
    Use DynamoDB global tables for automatic multi-Region replication. Deploy tables in multiple AWS Regions. Use provisioned capacity mode. Enable auto scaling.

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