By laurigates
Safely execute zero-downtime database migrations and system transitions by applying guided dual-write patterns for parallel data syncing, shadow mode for production traffic validation, and strangler fig for gradual replacement.
Dual write (double write) migration pattern for safely transitioning between data stores. Use when planning or implementing database migrations, switching storage backends, migrating to new schemas, or reviewing code that writes to multiple systems simultaneously.
Shadow mode (shadow traffic, dark launching) pattern for validating new systems under production load. Use when testing replacement services, validating new deployments, comparing system behavior, or planning traffic mirroring for migration validation.
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