https://www.chenk.top/en/tags/operations/Recent content in Operations on Chen Kai BlogHugoenTue, 30 Apr 2024 09:00:00 +0000https://www.chenk.top/en/databases/08-database-in-practice/Tue, 30 Apr 2024 09:00:00 +0000https://www.chenk.top/en/databases/08-database-in-practice/<p>Knowing how databases work internally is half the battle. The other half is keeping them running in production without losing data, dropping availability, or waking up at 3 AM. This article covers the operational knowledge that comes from experience — the things nobody teaches you until something breaks.</p> <hr> <h2 id="schema-migrations-changing-the-engine-while-flying" class="heading-anchor">Schema Migrations: Changing the Engine While Flying<a href="#schema-migrations-changing-the-engine-while-flying" class="heading-link" aria-label="Permalink to this section" title="Copy link to this section">#</a> </h2><p>Your schema will change. New features require new columns, new tables, new indexes. The question is how to evolve the schema without downtime.</p>