An enterprise plans to build three centers in two locations on Huawei Cloud. The customer requires cross-regional disaster recovery to avoid business interruption. Due to the special nature of the…

An enterprise plans to build three centers in two locations on Huawei Cloud. The customer requires cross-regional disaster recovery to avoid business interruption. Due to the special nature of the business, the customer requires disaster recovery RPO = 0. The technicians provided the customer with SDRS (Storage Disaster Recovery). The cloud-based two-site three-center solution of Cloud Backup and Recovery Service (CBR) + CBR (Cloud Backup and Recover) builds production center x and disaster recovery center Y in availability zones 1 and 2 of region A, and remote disaster recovery center Z in region B. The disaster recovery requirements of customers with RPO = 0 can be met between the two data centers X and Z. 1. When all BBUs of the storage controller are damaged, the controller will automatically set the IO write policy to write-through and lock it to ensure data reliability. It cannot be forced to change to write-back before fault recovery.