Java Tech Workshop

Aug 17, 2026 · Backend Development

How to Keep Redis and MySQL Consistent? Update DB First or Delete Cache First?

This article analyzes why cache and database can become inconsistent, compares four basic cache‑update patterns, explains the delayed double‑delete technique, shows how to use MQ for retrying cache deletions, and evaluates Canal binlog subscription as a zero‑intrusion solution for strong eventual consistency.