BBR Evaluation at a Large CDN

Bottleneck Bandwidth and Round-trip propagation time (BBR) is a TCP congestion control algorithm that has gained significant market attention due to its ability to deliver higher throughput as reported by many content providers. In this post, we evaluate BBR (version 1) in the context of Verizon Media’s content delivery network (CDN) workloads, which delivers significant volumes (multiple Tbps) of software updates and streaming video, and quantify the benefits and impact on the traffic. We hope that such an evaluation at a large CDN will help other content providers to choose the right congestion control protocol for their traffic.

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