Process
Scenario
If a natural disaster occurs in the region hosting the primary DB instance and the primary and standby DB instances cannot be connected, a DR instance in another region is promoted to the primary DB instance. Then, you can change the connection address on your applications to the DR instance address for service recovery. DRS allows you to perform cross-region disaster recovery between a primary DB instance and a DR instance.
A complete online disaster recovery consists of creating a DR task, tracking task progress, analyzing DR logs, and comparing data consistency. By comparing multiple items and data, you can synchronize data between different service systems in real time.
Process
The following flowchart shows the basic processes for disaster recovery.
- Step 1: Create a DR task. Select the service and DR databases as required and create a DR task.
- Step 2: Check the DR progress. During the disaster recovery, you can view the DR progress.
- Step 3: View DR logs. Disaster recovery logs contain alarms, errors, and prompt information. You can analyze system problems based on such information.
- Step 4: Compare DR items. The DR system supports object-level, data-level comparison to ensure data consistency.
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