如果使用Oracle数据库，最佳的灾备技术是Oracle ADG。下面两地三中心常用的架构，仅供参考。详细文档，请点击链接Oracle Active Guard
Focus On Oracle
Installing, Backup & Recovery, Performance Tuning,
Troubleshooting, Upgrading, Patching, Zero-Downtime Upgrade, GoldenGate
Oracle Exadata ,Oracle ODA, Oracle ZDLRA
