055-design-parallel-change

A parallel change strategy for database migration ensures compatibility and data integrity by maintaining both old and new schema versions during deployment. It uses expand, migrate, and contract steps to transition smoothly.

To handle a database column rename without service disruption, use a parallel change design. This approach maintains coexistence between old and new versions, ensuring data interpretation changes do not break active services.

You need a compatibility window for database schema changes when complex migrations require maintaining both old and new data versions. This includes scenarios like type changes, large-table backfills, and index or uniqueness modifications.

Plan a parallel change migration for large-table backfills by analyzing compatibility requirements and following structured expand, migrate, and contract steps. This workflow ensures data integrity and coexistence during the transition.

Yes, you can use parallel change for database type changes and index modifications. The approach guides you through compatibility analysis and structured steps to manage schema evolution without disrupting active services.