Rollback
Instantly revert to a previous version if something goes wrong—switch traffic back to the old model or code.
Think of it like
Hitting undo after a bad edit.
Example
New model v1.2 causes 5x error rate spike; revert to v1.1 while team debugs the issue.
How it actually works
Speed of rollback directly affects blast radius. Requires pre-tested fallback version running in parallel (blue-green or canary). Automated triggers (error rate threshold, latency spike) initiate rollback without human intervention. Test rollbacks regularly to ensure they work under stress.
For product teams
Insurance policy that lets teams ship fast and recover quickly if things break.
For engineers
Traffic selector or DNS points back to stable version; circuit breaker or health check validates old version is healthy; telemetry confirms rollback succeeded.
Related
- Versioning — Enabled by.
- Triggered by.
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