https://dplabs.tech/tags/migrations/ Recent content in Migrations on dplabs — Software Engineering & Technology Consultancy Hugo en-us Mon, 04 Aug 2025 00:00:00 +0000 https://dplabs.tech/blog/database-migrations-continuous-delivery/ Mon, 04 Aug 2025 00:00:00 +0000 https://dplabs.tech/blog/database-migrations-continuous-delivery/ <p>Every CI/CD guide covers application deployment. Very few cover the harder problem: database schema changes in a system that can never be offline.</p> <p>The challenge is that application and database deployments are not atomic. During a rolling or blue-green deployment, old and new application versions run simultaneously against the same database. A migration that&rsquo;s incompatible with the old version causes the old version to fail — precisely during the deployment window when you can least afford failures.</p>