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#database-migration

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2 articles

The Expand-Contract Pattern: Zero-Downtime Database Schema Changes

The Expand-Contract Pattern: Zero-Downtime Migration The most dangerous operation in backend engineering is a breaking database schema change (e.g., renaming a column). If you just rename it, your existing application co…

Apr 20, 20261 min read

Deep DiveBackend Systems Mastery

#database-migration#zero-downtime#expand-contract

DatabasesAdvanced

The Shadow Database Pattern: Verifying Schema Changes with Production Traffic

The Shadow Database Pattern Changing the schema of a 10TB database that is processing 50,000 requests per second is a high-stakes operation. Even with perfect testing in a staging environment, production traffic often re…

Apr 20, 20262 min read

Deep DiveBackend Systems Mastery

#database-migration#shadow-db#devops