What should a solutions architect recommend to meet this requirement?
Use Amazon ElastiCache for Redis.
Use Amazon DynamoDB Accelerator (DAX).
Replicate data by using DynamoDB global tables.
Use Amazon ElastiCache for Memcached with Auto Discovery enabled.
Explanations:
Amazon ElastiCache for Redis is a caching solution that requires additional operational management and may not integrate seamlessly with DynamoDB without reconfiguration.
Amazon DynamoDB Accelerator (DAX) is designed to improve the performance of DynamoDB by providing in-memory caching without requiring changes to the existing application. It reduces read latencies significantly.
While DynamoDB global tables allow for data replication across regions, this approach does not specifically address read performance and could introduce additional complexity.
Amazon ElastiCache for Memcached would also add operational overhead and is not specifically optimized for DynamoDB, which could lead to additional management requirements.