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) Wed, 17 Jun 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself.en https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself.en Human memory and willpower are far more fragile than we like to admit. What prevents mistakes is not stronger willpower but a well-designed system. This is about building structures of checklists, automation, and externalized working memory that work in your place. Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) systemchecklistautomationproductivitymindsetworkflow https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself.ja https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself.ja 人間の記憶や意志は、思っているよりずっと不完全です。ミスを防ぐのは、より強い意志ではなく、よく設計されたシステムです。チェックリスト、自動化、外部化したワーキングメモリで、自分の代わりに働く仕組みを作る方法を語ります。 Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) systemchecklistautomationproductivitymindsetworkflow https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself https://www.youngju.dev/blog/culture/2026-06-17-trust-the-system-not-yourself 인간의 기억과 의지는 생각보다 훨씬 불완전합니다. 실수를 막는 것은 더 강한 의지가 아니라 잘 설계된 시스템입니다. 체크리스트, 자동화, 외부화된 작업기억으로 나 대신 일하는 구조를 만드는 법을 이야기합니다. Wed, 17 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) systemchecklistautomationproductivitymindsetworkflow https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist.en https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist.en Migrations are among the most common and most painful sources of outages. This article walks through typical failure modes like lock storms, replication lag, data loss, and irreversible changes, derives causes and lessons from three hypothetical postmortems, and wraps up with prevention patterns and comprehensive checklists. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationpostmortemincidentreliabilitychecklistoperations https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist.ja https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist.ja マイグレーションは最も多く、最も痛い障害の源です。ロック嵐、レプリケーション遅延、データ損失、ロールバック不能といった典型的な事故タイプを押さえ、3件の仮想ポストモーテムで症状から原因と教訓を導き、予防パターンと総合チェックリストで整理します。 Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationpostmortemincidentreliabilitychecklistoperations https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist https://www.youngju.dev/blog/database/2026-06-16-migration-incident-postmortems-checklist 마이그레이션은 가장 흔하면서도 가장 아픈 장애의 원천입니다. 락 폭주, 복제 지연, 데이터 손실, 롤백 불가 같은 전형적 사고 유형을 짚고, 세 건의 가상 포스트모템으로 증상에서 원인과 교훈을 끌어내며, 예방 패턴과 종합 체크리스트로 정리합니다. Tue, 16 Jun 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) databasemigrationpostmortemincidentreliabilitychecklistoperations