Chaos and Order https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Tue, 16 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc.en Zero-Downtime Data Migration — Moving Data with Dual-Write, Backfill, and CDC https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc.en Moving data to a new store without stopping the service is tricky because of consistency and ordering guarantees. This post lays out a staged cutover strategy combining Dual-Write, Backfill, and CDC, plus verification, rollback, and idempotency design from an operational point of view. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationcdcdebeziumdual-writezero-downtime https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc.ja 無停止データマイグレーション — Dual-Write、Backfill、CDC で移す https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc.ja サービスを止めずにデータを新しいストアへ移すのは、一貫性と順序保証のため難しい作業です。Dual-Write、Backfill、CDC を組み合わせた段階的カットオーバー戦略と、検証、ロールバック、冪等性設計を実務の観点から整理します。 Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationcdcdebeziumdual-writezero-downtime https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc 무중단 데이터 마이그레이션 — Dual-Write, Backfill, CDC로 옮기기 https://www.youngju.dev/blog/database/2026-06-16-zero-downtime-data-migration-dual-write-cdc 서비스를 멈추지 않고 데이터를 새 저장소로 옮기는 일은 일관성과 순서 보장 때문에 까다롭습니다. Dual-Write, Backfill, CDC를 조합한 단계별 컷오버 전략과 검증, 롤백, 멱등성 설계를 실무 관점에서 정리합니다. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationcdcdebeziumdual-writezero-downtime