A company has a web application hosted on Amazon EC2 instances behind an Application Load Balancer (ALB). The application uses Amazon DynamoDB for its database. The company is experiencing a high volume of read requests for static configuration data stored in DynamoDB, leading to high costs. What is the MOST cost-effective way to reduce DynamoDB costs while improving read performance?

Answer options:

A.

Migrate the configuration data to Amazon RDS.

B.

Implement Amazon DynamoDB Accelerator (DAX) in front of the DynamoDB table.

C.

Enable DynamoDB Auto Scaling for read capacity units.

D.

Use Amazon CloudFront to cache the DynamoDB responses.

How to approach this question

Identify the native caching solution for DynamoDB.

Full Answer

B.Implement Amazon DynamoDB Accelerator (DAX) in front of the DynamoDB table.✓ Correct

Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10x performance improvement and reduces read capacity costs for read-heavy workloads.

Common mistakes

Choosing Auto Scaling, which increases costs rather than reducing them.

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