Canary Release

Named after the 'canary in a coal mine', this technique exposes a small percentage of users (e.g., 5%) to the new version while the majority continue using the current version. If the canary group experiences no issues, the rollout gradually expands. Canary releases enable early detection of problems with minimal blast radius. Monitoring and automated rollback are essential — if error rates increase for the canary group, traffic is automatically reverted. This technique is widely used by companies like Google, Netflix, and Facebook for production deployments.