Engineering postmortems, with sources
Follow the timeline of real engineering failures: what broke, how teams detected it, how they recovered, and what they changed afterward. Timeline claims link to their sources.
GitHub.com · 6 timeline events
A network partition triggered cross-region database failover, leaving clusters with divergent writes and causing more than a day of degraded service while GitHub restored consistency.
Read the timeline →Cloudflare WAF and global network · 6 timeline events
A globally deployed WAF rule contained a regular expression with excessive backtracking, exhausting CPU on Cloudflare’s HTTP/HTTPS serving path.
Read the timeline →Amazon S3 (AWS US-EAST-1) · 4 timeline events
An incorrectly entered operational command removed more S3 subsystem capacity than intended, affecting S3 and dependent AWS services in Northern Virginia.
Read the timeline →