Huawei outlines theevolution of disaster recovery (DR)in data centers infour phases:
B. Single DC– No DR capability; all services reside in one data center.
C. Primary/Backup DC– Two data centers where one is primary and the other acts as a backup.
A. Two-site three-DC– One production site and two DR sites (or combinations).
D. Multi-site multi-DC– Advanced architecture with distributed data centers and cross-DR capabilities for resilience.
These are officially listed asDR evolution stagesin Huawei's multi-DC solution strategy.
[Reference:, HCSA-IP Network V4.0 Study Guide — Chapter 7: Huawei Data Center Network Products and Solutions, Huawei Xinghe Disaster Recovery Architecture White Paper, ]
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