Agent‑Scheduler

Tencent Cloud Developer

Mar 29, 2019 · Databases

Design of High‑Availability System and Fast Recovery in Tencent CynosDB

Tencent CynosDB achieves high availability and rapid recovery through an external HA service that combines a co‑located monitoring agent, a ZooKeeper‑backed scheduler for fault detection, decision making, and automated switch/rejoin/rebuild actions, and a VDL‑driven distributed storage recovery mechanism that prevents split‑brain scenarios.