https://cihandogan.co.uk/tags/db2/Recent content in Db2 on Cihan DoganHugoen-gbThu, 15 May 2025 00:00:00 +0000https://cihandogan.co.uk/blog/migrating-payment-database-db2-to-mysql/Thu, 15 May 2025 00:00:00 +0000https://cihandogan.co.uk/blog/migrating-payment-database-db2-to-mysql/<h2 id="introduction">Introduction</h2> <p>In early 2025, I led the payment team through a database migration from IBM DB2 to MySQL. Internally we called it Project Itchy Bird. Our payment domain was picked to go first, which meant we&rsquo;d be figuring things out for everyone else too. Building the tools, hitting the edge cases, writing the playbook other teams would later follow.</p> <p>We were dealing with 109 tables, some close to 1TB, all holding PCI-scoped sensitive data. There was no room to get this wrong.</p>