Huawei geo-redundant 3DC DR solution ensures the continuity of core services even if any two...

DR data replication → Storage layer; Service access link → Network layer; Service system operating platform → Host layer; DR policy formulation → DR management layer

Huawei ' s DR technology section identifies replication at the host layer, SAN network layer, and storage array layer. It states that storage-layer DR uses inter-array data replication to replicate data from the local array to the DR array. Network-layer DR places the replication mechanism between application servers and backend storage. For the host layer, the course states that data-replication or switchover software can be installed on hosts in the production and DR centers to form an application-level DR solution. The DR-management function is provided by BCManager/eReplication. Its server performs “DR service process control, DR policy scheduling, and configuration data management of DR resources and services.” Therefore, replication of protected data belongs to the storage layer; connectivity between sites and services belongs to the network layer; the service operating environment belongs to the host layer; and formulation/orchestration of DR policies belongs to the DR-management layer.

Study Guide Topics: Data Protection Basics → DR Solution Architecture → Common DR Technologies → BCManager eReplication → Geo-Redundant 3DC DR.