[derefr]

> What about network throughput variance? On AWS, the variance is only 0.006 GB/sec. This means that the GCP network throughput is 81x more variable when compared to AWS.

What would cause this particular effect? It's very interesting.

Is it, perhaps, that with GCP you're hitting the capacity of the network, while with AWS you're being artificially capped at that speed on a network that could theoretically go faster?

Or maybe it's just different strategies for bandwidth-limiting instances employed by AWS's SDN layer vs. GCP's? Probabilistic packet-drop (to force TCP window scaling) vs. artificially-induced nanosecond-scale egress latencies?

[wmf]

GCP Andromeda is software-based network virtualization which tends to have lower performance and higher performance variability. https://www.usenix.org/node/211244

AWS Nitro/ENA is hardware network virtualization which is faster and more consistent.