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Help Center/ Data Replication Service/ FAQs/ Real-Time Disaster Recovery/ What Is the Meaning of Forward and Backward Subtasks in Dual-Active Disaster Recovery?

What Is the Meaning of Forward and Backward Subtasks in Dual-Active Disaster Recovery?

Updated on 2023-07-03 GMT+08:00

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DRS uses active 1 and active 2 to distinguish RDS roles in the current cloud (local region) when you create a dual-active DR task. Active 1 indicates that the selected RDS instance has initial data. Active 2 indicates that the selected RDS instance is empty and waits to receive data.

Figure 1 shows the dual-active DR instance information.

If Active 2 is selected, the DB instance selected is empty and will receive data. After the task is created, configure a forward task for migrating data to the cloud. After the forward task enters the DR state, configure and start the backward task.
If you select Active 1, the DB instance selected has initial data and data to be synchronized. After the task is created, configure a backward task for migrating data out of the cloud. After the backward task enters the DR state, configure and start the forward task.

Figure 1 Dual-active DR instance information