If the database stops in all regions, you can restore from backup data by storing it in object storage.

Refer to "5.11.1 Disaster Recovery by Backup/Restore Method" to build an FEPCluster in one region. At this time, create the multi-master replication configuration file and Service resource to prepare for building the multi-master replication.

In the multi-master replication configuration file, specify the FEPCluster restored from backup data as the replicationOwner.

After building the FEPCluster, apply the update_multi_master_replication custom resource to enable multi-master replication.

In another region, build an empty database and replicate data by having it join the multi-master replication built by the previously constructed FEPCluster.