zero-downtime-migration
Zero-Downtime Migration (2026)
Database migration patterns that ensure continuous service availability during schema changes.
Overview
- Deploying schema changes to production systems with uptime requirements
- Renaming or removing columns without breaking existing application code
- Adding NOT NULL constraints to existing columns with data
- Creating indexes on large tables without locking
- Migrating data between columns or tables during live traffic
- Using pgroll for automated expand-contract migrations
Quick Reference
Expand-Contract Overview
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