Xiaolin Talks Programming

Nov 7, 2026 · Databases

Zero-Downtime Database Migration: Stock, Incremental, Validation & Cutover in Spring Boot

A comprehensive engineering guide to zero-downtime database migration covering cursor-based stock migration, incremental sync via binlog or dual-write, CRC-based chunked validation, field-level diffing, gray read cutover with dual-read verification, write-switch patterns, and rollback procedures — all implemented in Spring Boot with production-grade patterns and pitfalls.