In order to ensure the performance and improve the utilization of the hard disk in Huawei Oceanstor 9000, it is recommended to set the stripe value according to the expected average file size in a directory. Which is the following description of the stripe setting is wrong?

• A.Only non-empty directories can modify the redundancy ratio
• B.The relationship between stripe size and read and write performance is: 512KB>256KB>128KB>16KB
• C.The modified strip size is only effective for the file that was written, and the existing file before the modification still keeps the strip size before the modification
• D.The relationship between redundancy ratio and read and write performance from high to low is: N+l>N+2=N+2:1>N+3:1>N+4

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Which of the following are subsystems of OceanStor BCManager eReplication? (Multiple Choice)

• A.eReplication Server
• B.HyperReplication
• C.eReplication Agent
• D.eReplication UI

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Which of the following statements about the features of Huawei HyperMirror are correct? (Multiple choice)

• A.This continuously protected LUN can be the LUN of a third-party storage system
• B.can configure other value-added features for LUNs that are protected by volume mirroring to provide multiple protections for data
• C.provides two mirror copies of a LUN, and the data in these two copies is exactly the same
• D.When one of the mirror copies fails, the business on the LUN is not affected in any way, and the host side can still work normally

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Huawei OceanStor 9000 provides a single file system, offering a unified file system namespace.
Which of the following statements about the unified file system namespace provided by Huawei OceanStor 9000 is false?

• A.The unified namespace provides a unified storage resource pool where storage space can be centrally managed and allocated.
• B.As the root directory of the entire system, a namespace cannot be shared or accessed. However, its subdirectories can be shared and accessed.
• C.During the startup of the OceanStor 9000, a namespace is automatically created and its name is the same as that of the OceanStor 9000.
• D.All shared directories are subdirectories in the unified namespace.

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In a backup structure with a primary backup domain and multiple branch backup domains, which of the following description is wrong?

• A.Each branch backup domain operates independently, and the connection network failure with the main backup domain does not affect the backup job of the branch backup domain.
• B.The main backup domain actively collects metadata of each branch backup domain on a regular basis. After the connection network between the branch backup domain and the main backup domain is interrupted and restored, the metadata transmission can be automatically repaired.
• C.Integrate multiple branch backup domains into a primary backup domain, and centrally view the operation reports of each backup domain in the primary backup domain.
• D.Register the remote client as an unconfigured client in the primary backup domain. The clients can be hidden and grouped.

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