nexus/sreweekly/markdown/530/08-we-turned-off-pub-sub-and-nobody-noticed.md

We turned off Pub/Sub and nobody noticed

• 期号: SRE Weekly Issue #530（2026-08-17）
• 作者: Patrick Hamann and Mike Fisher — incident.io
• 链接: https://incident.io/blog/we-turned-off-pub-sub-and-nobody-noticed

简介

Their event-oriented system was based on Google Pub/Sub with its 99.95% SLA, but their own SLA was 99.99%. To resolve that, they moved toward an active-active architecture, load-balancing across 2 message brokers.

There’s an interactive simulation of their algorithm midway through that’s fun to play with!