Rival to the MacroSAN active-active solution

MacroSAN active-active solution realizes disaster recovery switchover at the application level by adopting the storage remote replication feature (synchronous/asynchronous), third-party arbitration, and multipathing software equipped in the host OS. Huawei’s active-active solution has the following countermeasures:
1. MacroSAN active-active solution is asymmetric, and the system works in active/standby mode. I/Os of the standby site are forwarded to the active site. In essence, the solution uses the volume mirror. The active-active solutions of other vendors and Huawei are symmetric. There is no active/standby site and I/O requests are processed at both sites.
2. MacroSAN active-active solution has distance limitation. In this solution, devices are mirrored by 10GE links. The high latency does not allow the distance between sites to be longer than 10 km. However, Huawei active-active solution allows the distance between two sites to be 100 km.

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