通过HTTP/3流量工程实现更高级别的客户体验

Next level customer experience with HTTP/3 traffic engineering

TL;DR: HTTP/3 has gathered consensus by the industry as the best technical solution for improving Web protocol stack. Usage statistics indicate that 29.8% of websites worldwide have already embraced HTTP/3 to cater to their users, with Zalando being among them. The architecture of HTTP/3, coupled with the underlying QUIC transport, introduces concurrent access and low-latency capabilities to solutions, facilitated by user-space flow and congestion controls operating over the User Datagram Protocol (UDP). QUIC is used by 8.0% of all the websites. The result is an enhanced customer experience that fundamentally transforms content consumption, promising visually stunning displays on customers' mobile screens. This post will delve into the intricacies of HTTP/3 traffic engineering, Zalando experience with it and our vision for next steps.

TL;DR：HTTP/3已经得到业界的共识，被认为是改进Web协议栈的最佳技术解决方案。使用统计数据表明，全球范围内已有29.8%的网站采用了HTTP/3来满足其用户需求，其中包括Zalando。HTTP/3的架构，结合底层的QUIC传输，引入了并发访问和低延迟的能力，通过在用户数据报协议（UDP）上运行的用户空间流量和拥塞控制实现。QUIC被8.0%的网站使用。其结果是提供了增强的客户体验，从根本上改变了内容消费方式，为用户的移动屏幕提供了视觉上令人惊叹的显示效果。本文将深入探讨HTTP/3流量工程的复杂性，Zalando对其的经验以及我们对下一步的愿景。

The significance of HTTP/3 adoption

HTTP/3采用的重要性

Nowadays, 85% of total Internet traffic is TCP traffic. HTTP traffic takes about 54.6% and 54.4% of it is the traffic to mobile devices. TCP was developed in the 70s of last century to build reliable client/server communication. The TCP-based family of Web protocols, specifically HTTP/1.0, HTTP/1.1 and HTTP/2, inherits the legacy TCP inefficiencies for building concurrent and low-latency Web applications on wireless networks. Looking in-depth on the protocol stack involved for end-to-end communication, there are issues in (1) network infrastructure utilisation and (2) protocol design:

如今，总体互联网流量的85%是TCP流量。HTTP流量占约54.6%，其中54.4%是移动设备的流量。TCP是上世纪70年代开发的，用于构建可靠的客户端/服务器通信。基于TCP的Web协议族，特别是HTTP/1.0、HTTP/1.1和HTTP/2，在无线网络上构建并发和低延迟的Web应用程序时继承了TCP的传统低效性。深入研究端到端通信所涉及的协议栈，存在以下问题：(1)网络基础设施利用率问题；(2)协议设计问题：

Issues with Utilisation of IP Network

(1) Issues with Utilisation of IP Network: The Internet comprises...