Quick Answer
Canary and blue-green in production: canary is lower risk (small blast radius if broken). Blue-green is faster rollback but needs double infrastructure. Use canary for most deployments: 5% -> 25% -> 100% with automated metric-based promotion. Blue-green for high-stakes releases or DB migration rollouts. Both require monitoring to be meaningful - if you don't watch metrics, you miss the point.
Answer
Canary: small traffic portion tests new release. Blue-Green: run old (blue) and new (green) simultaneously. Minimizes downtime and deployment risk.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
