Moving from serverless to edge-first changes everything. We document the patterns we use for zero-downtime deployments, regional data sovereignty, and cold start elimination on Vercel Edge.
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Key Patterns
- Canary Deploys: 5% traffic to new version, automated rollback on error spike
- Edge Functions: Compute at 30+ global locations, sub-50ms cold starts
- Regional Routing: Data stays in-region for GDPR compliance
- Cache Strategy: Stale-while-revalidate with edge-level invalidation