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

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