Reference
Migration Patterns
Practical migration patterns for repositories, service moves, and staged data transitions.
Migration work succeeds when sequencing is explicit and validation is boringly repeatable.
Pattern 1: Mirror then cut
- Mirror source state into target
- Validate parity with scripted checks
- Freeze writes briefly
- Execute cutover and monitor
Pattern 2: Dual-path transition
- Serve both protocols or endpoints
- Add deterministic redirects
- Collect error-rate and latency deltas
- Remove old path after confidence window
Pattern 3: Data volume move
- Stage volume and filesystem options
- Sync with checksum verification
- Swap mount points during low-risk window
- Keep old volume read-only for rollback horizon