Amazon DynamoDB Accelerator (DAX) is now available in the EU (Frankfurt) Region. You can create DAX clusters using Amazon EC2 R4 and T2 instance types in the Region for applications that require microsecond latency. Additionally, you now can launch DAX clusters using R4 instance types in the US West (N. California) Region. R4 is a Memory Optimized Amazon EC2 instance, well-suited for memory-intensive, latency-sensitive workloads such as DAX. T2 instances provide a baseline level of CPU performance and can be more cost-effective for test and development workloads or production applications that require smaller caches.