Single service comparison

Huawei offers a dedicated managed DR control plane (Storage Disaster Recovery Service, marketed internationally as Business Recovery Service / SDRS) that wraps ECS+EVS asynchronous block replication into protection groups with one-click switchover, online drills, and reverse protection, targeting RPO of seconds and RTO of minutes. GCP provides no equivalent single service: block-level async replication lives in Persistent Disk, application-level failover is assembled from Migrate to Virtual Machines, Instance Groups, and Traffic Director, and each layer exposes separate APIs and runbooks.

Service boundary and integration differ. SDRS couples tightly to ECS/EVS and Cloud Connect for cross-region reach, so the protected instance lifecycle, disks, and network are managed as one unit. On GCP, replication, networking (VPC peering/Shared VPC), and compute are owned by distinct products whose quotas and regional footprints must be reconciled independently, shifting more orchestration responsibility onto the operator and any orchestration tooling.

Operational and scaling responsibility differs. SDRS bills mainly for the EVS capacity at the DR site plus the protected-instance server resources, with no separate DR-room build-out, and exposes a single console for drills, consistency checks, and encrypted transmission. GCP DR costs are spread across PD snapshot/async-replica storage, inter-region egress, and any migrated compute; achieving equivalent drill automation and data-consistency verification requires customer-assembled tooling rather than a built-in workflow.

Start with an assessment that maps each workload's RPO/RTO, data class, and current GCP replication mechanism (Persistent Disk async replication, snapshots, managed database replicas). For ECS-based stateful workloads, target SDRS as the principal equivalent; for file and object data anticipate SFS/OBS replication, and for backups use CBR. Do not assume parity — validate SDRS regional availability, protection-instance flavors, disk type support, and supported ECS OS images against the workload inventory before committing.

For the data and application layer, recreate protected instances on Huawei ECS using SDRS protection groups, attaching EVS disks that match or exceed the source PD type and size so async replication can keep up with the write rate. Use SMS or image import to lift the OS/application image rather than reconstructing VMs manually, then enable SDRS protection between the chosen production and DR AZs/regions. Database-native DR (RDS cross-region standby) should be migrated to managed-database replicas rather than forcing them under SDRS, where supported.

Validation and cutover must exercise SDRS online drills without stopping production, confirming replicated data consistency and measuring actual RPO before any planned switchover. Document the switchover, reverse-protection, and failback runbooks, and rehearse them at least once with DNS/Cloud Connect routing changes. Confirm that cross-AZ/region latency and Cloud Connect bandwidth keep the replication within RPO during peak write load.

Mind the gaps and cost-model shift. Huawei bills DR primarily as EVS capacity at the DR site plus the small server footprint for protected instances, and SDRS licenses are capacity-based; GCP commonly bills PD async-replica storage, snapshot storage, and inter-region egress separately. Recompute TCO using peak write rate, retention, and cross-region transfer, and budget for the services SDRS does not replace — object/file replication, schema-aware database DR, and orchestration/observability — which may still require CBR, OBS/SFS replication, and external automation.