It is true that Amazon Aurora is not limited by the bandwidth of the storage system, as it is huge and distributed across hundreds/thousands of nodes across an

It is true that Amazon Aurora is not limited by the bandwidth of the storage system, as it is huge and distributed across hundreds/thousands of nodes across an entire AWS region. And storage for each database instance is indeed only limited to 64TB, far above what most people need. But each single instance can still have limitations, such as CPU horsepower, memory, etc. The r4.16xl has 25Gbit networking, as opposed to the r4.8xl, which has 10Gbit network. So if your workload is write-intensive, such as streaming or IOT data, you will find the r4.16xl can have significantly better write performance. https://aws.amazon.com/ec2/instance-types/ https://aws.amazon.com/ec2/instance-types/ I hope this helps!