- This solution is based on a hybrid cloud consisting of an on-premises data center, a primary Alibaba Cloud zone, and a secondary Alibaba Cloud zone. The on-premises data center and cloud zones communicate through a leased line or VPN.
- "Stateless" applications are deployed in the the on-premises data center and two zones for real-time synchronization and backup between on-premises and off-premises databases.
- If a failure occurs in any of the three databases (the on-premises data center or either of the two zones), traffic can be switched to one of the other two to ensure service continuity. After the fault is resolved, the service traffic can be switched back to the preferred service center.