After services are switched from the production center to the DR center through planned migration, the services must be switched back to the production center based on a drill plan.
Prerequisites
- Planned migration and reprotection have been successfully performed for the service system in the production center according to the recovery plan.
- The production host is working properly and the service system in the original production center is in standby state.
In the Oracle application, the cluster is not stoppd by default. To stop the cluster, you need to open the configuration for stopping the cluster and then perform the next step. For details about how to stop the cluster, see 4.2 Stopping the Oracle Cluster.
Procedure
- Test the recovery plan and clear the test data on eReplication.
Before the services are switched back, you need to perform a DR test to verify the data availability to ensure that services can be switched back successfully. After the test, you must clear the test data to avoid switchback failure caused by test data. For details, see DR Test/Clearance.
- On eReplication of the DR center, perform a planned migration.
This step aims to switch services back to the production center from the DR center. After the migration, check the data and clear the test data. For details, see 1 to 3 in Performing Planned Service Migration in a HyperMetro Data Center.
If the protected object type is LUN, Oracle, IBM DB2, Microsoft SQL Server, or SAP HANA, select hosts or host groups in the production center as the recovery target.
- Perform reprotection on eReplication at the DR center. After planned migration, the application system is working in the production center and protected groups become Invalid. To ensure that the production center can be recovered from the DR center when an event (planned or unplanned) happens on it after switchback, reprotection must be performed and the replication status from it to the DR center must be established again to synchronize data and ensure services are protected. For details, see 4 to 5 in Performing Planned Service Migration in a HyperMetro Data Center.
Result
After the heavy protection execution is complete, the protection group state automatically returns to normal.