What is a reason for using DynamoDB over RDS?

DynamoDB is particularly suited for applications needing low-latency and highly available key-value access. Its architecture is designed to provide fast and predictable performance, which is crucial for use cases such as gaming, IoT, mobile applications, or any scenario where rapid data access is essential. This is achieved through its fully managed nature which abstracts the complexity of scaling and redundancy, allowing for efficient handling of massive amounts of traffic without the operational overhead typically associated with such tasks.

While other databases, including RDS (Relational Database Service), can certainly offer performance, they may not match the specific low-latency key-value access that DynamoDB excels at in highly distributed environments. This makes DynamoDB a strong choice for applications requiring quick retrieval of a large number of records, particularly when the data model aligns with the key-value format that DynamoDB provides.