A customer used Huawei hybrid flash storage to build a primary and backup disaster recovery system, and the production center and remote disaster recovery center adopted asynchronous remote replication technology. The business data, logs and other data in the customer database application are stored in different LUNs, and the remote replication pairs of all LUNs are added to the same consistency group. When the consistency group is synchronized, split or switched between master and slave. At the same time, the remote replication pair of all LUNs in the group also performs synchronization, splitting, or master-slave switchover operations.

A client, client1 needs to read file X from Huawei OceanStor 9000, and the response to the read request node is A. Regarding the reading process of file X, the correct one is: (Multiple Choice)

A company has a set of Huawei storage devices (such as Huawei OceanStor 2600T) in data center A, and recently purchased a new set of Huawei all-flash storage devices (such as Huawei OceanStor 5300Fv5) and deployed it in data center B. The active-active feature can be configured between two storages to ensure business continuity.

The Persistence layer of Huawei's distributed storage provides persistent storage capabilities, EC and multi-copy capabilities, and provides Plog append only access capabilities through PlogClient.

A customer deploys a set of OceanStor V3 storage in two cities and adopts asynchronous remote replication networking between the two storage arrays. Which of the following statement is correct? (Multiple choice.)