strangler-fig

Zero downtime legacy migration is achieved by incrementally running old and new systems in parallel. This pattern enables gradual traffic shifts and instant rollback to prevent production outages during component replacement.

The strangler fig pattern incrementally migrates legacy systems by running old and new applications in parallel. It allows precise traffic routing control and canary-style validation to safely replace components over an eight-phase migration process.

Feature flags enable canary deployments by controlling traffic routing between legacy and new systems. This allows gradual traffic shifts, validation of new components, and instant rollback readiness if production issues arise.

The best way to route traffic during production migration is running parallel systems with gradual traffic shifts. This allows canary-style validation and instant rollback, satisfying safe component replacement requirements.

Use the strangler fig pattern for production migrations with downtime risk instead of direct swaps. It enables gradual traffic routing, validation, and instant rollback, preventing outages that occur with all-at-once infrastructure changes.

A safe legacy migration process follows an eight-phase migration plan. It starts by enabling parallel runs, then gradually shifts traffic while monitoring results, ensuring component replacement and infrastructure swaps occur safely.