Inter-AZ cloud network performance

Archana Kesavan of ThousandEyes speaking at NANOG75 reports that network traffic between AZs within a single region is generally “reliable and consistent,” and that tested cloud providers offer a “robust regional backbone for [suitable for] redundant, multi-AZ architectures.”

ThousandEyes ran tests at ten minute intervals over 30 days, testing bidirectional loss, latency, and jitter. Kesavan reported the average inter-AZ latency for each tested cloud:

AWSAzureGCP
.82ms1.05ms0.79ms

Within the four tested regions in AWS, they found:

RegionLatency
us-east-10.92ms
ap-south-10.72ms
eu-west-20.61ms
sa-east-11.13ms

Kesavan’s slides and video are online.