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6.5Strategy Comparison
| Strategy | How It Works | Where Tests Run | Risk Level | Rollback Speed | Best For |
|---|---|---|---|---|---|
| Blue-Green | Two environments; traffic switches | Full suite against green before switch | Low | Instant | Teams with reliable test suites |
| Canary | Small % of traffic to new version | Monitoring and synthetic tests | Medium | Fast (automatic) | High-traffic apps with good observability |
| Rolling | Instances update one at a time | Health checks per instance | Medium | Slow (roll forward/back) | Stateless services with large fleets |