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A company deploys a set of multi-select Huawei distributed storage in data center A and data center B. It mainly uses block services to carry database, virtual machines and other application-related services, and uses block services to work with active-active features and upper-layer applications to ensure Business continuity. For this dual-active scenario, which of the following descriptions are correct? (Multiple choice)

A company deploys a set of multi-select Huawei distributed storage in data center A and data center B. It mainly uses block services to carry database, virtual machines and other application-related services, and uses block services to work with active-active features and upper-layer applications to ensure Business continuity. For this dual-active scenario, which of the following descriptions are correct? (Multiple choice)
A . It is recommended to use active-active consistency groups for database applications
B . It is recommended to deploy an arbitration server on a third-party site
C . It is recommended that the distance between data center A and data center B are less than 100 kilometers
D . It is recommended to use FC networking for the arbitration link

Answer: BCD

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