dbaplus Community

Jun 12, 2023 · Databases

How a Redis Memory Upgrade Triggered Data Loss: Sentinel Failover Lessons

A recent Redis deployment faced memory expansion, a master‑slave switch, and unexpected data loss when the new master entered read‑only mode, prompting a deep dive into sentinel behavior, maxmemory settings, and replica‑ignore‑maxmemory nuances to prevent similar failures.