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Shadow Testing Basics
Test new code with real traffic
Shadow testing duplicates real traffic to a new service version, compares responses, and monitors performance without affecting users, catching issues before promotion.
- shadow testing
- traffic mirroring
- validation
- production
- safe rollout
Mirror Traffic
Replay real requests to shadow instances without user impact.
Compare
Check responses, errors, latency against primary service.
Promote
Fix deltas, then move to canary/rollout with confidence.
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