migration-helper

To perform a zero-downtime schema migration in Convex, use internal mutations to backfill new fields, apply batch processing, schedule migrations, and implement dual-write patterns for progressive data transitions without service interruptions.

Renaming a table in Convex requires a breaking change strategy. You can use dual-write patterns to maintain both old and new tables during the transition, then backfill existing data before removing the old structure.

To backfill new fields in Convex, define an internal mutation that iterates through existing documents in controlled batches, populating the new field values while maintaining schema integrity and avoiding timeout errors.

You need a dual-write pattern for Convex schema changes when transitioning between structures without downtime. It allows you to write data to both old and new schemas simultaneously, ensuring consistency during progressive migration.

Yes, you can batch data transformations in Convex. By defining internal mutations that process data in controlled batches, you execute migrations safely within time limits, ensuring production-ready transitions without exceeding system constraints.