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#zero-downtime

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5 articles

Database Sharding Part 6: Zero-Downtime Re-sharding

Database Sharding Part 6: Zero-Downtime Re-sharding Eventually, your sharding strategy will need to change. Perhaps you outgrew your initial 4-shard cluster and need to expand to 16 shards. Or perhaps you realized your S…

Apr 20, 20265 min read

PlaybookDatabase Sharding Mastery

#data-migration#zero-downtime#sharding

DatabasesAdvanced

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

DatabasesAdvanced

Zero-Downtime Migration: Moving from SQL to NoSQL

Zero-Downtime Migration: Moving from SQL to NoSQL Migrating a live production system from a relational database (like PostgreSQL) to NoSQL (like DynamoDB or MongoDB) is like changing an airplane engine in mid-flight. You…

Apr 20, 20262 min read

Deep Dive

#data-migration#sql#nosql

DatabasesAdvanced

Zero-Downtime Database Migrations: Patterns for Production

Database migrations are the most dangerous part of a deployment. Application code changes are stateless and reversible — rollback a bad deploy and your code is back to the previous version. Database schema changes are st…

Jun 8, 20258 min read

Deep Dive

#database#migrations#postgresql