https://www.alibabacloud.com/blog/behind-alibabas-double-11-mysterious-dragonfly-technology-%C2%AEc-pb-grade-large-file-distribution-system_594074 https://www.a

https://www.alibabacloud.com/blog/behind-alibabas-double-11-mysterious-dragonfly-technology-%C2%AEc-pb-grade-large-file-distribution-system_594074 https://www.alibabacloud.com/blog/behind-alibabas-double-11-... indicates Dargonfly existed much longer and was used in scenarios much larger than what Uber presented. What got into CNCF may be a newer iteration based on what Alibaba has been running but that means it should at least hold a candle to what is described in the post. With that said, one can surmise the Java version is the one they used in production. Apart from that, P2P image distribution is probably limited to internal uses that are not critical. Kind of missing indications of much difference in reliability to say an internal CDN this would give.