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Cloudflare outage should not have happened

15 days ago
https://ebellani.github.io/blog/2025/cloudflare-outage-should-not-have-happened-and-they-seem-to-be-missing-the-point-on-how-to-avoid-it-in-the-future/
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  • #Cloudflare
  • #Database Design
  • #Outage
  • Cloudflare experienced a global outage due to a database/application mismatch.
  • The root cause was a query lacking constraints, leading to unintended data duplication.
  • Cloudflare's mitigation steps focus on physical replication but miss addressing logical single points of failure.
  • The author critiques Cloudflare's approach, advocating for analytical design to prevent such outages.
  • Suggestions include no nullable fields, full database normalization, and formally verified application code.
  • FAANG-style companies are urged to adopt formal methods for critical systems to ensure reliability.
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