Which of the following description of the Huawei Oceanstor 9000 software module is wrong?

• A.MDS (MetaData Service) manages the metadata of the file system, each node of the system can store all metadata
• B.Various value-added features such as snapshots, tiered storage and remote replication are provided by the PVS module
• C.OBS (Object-Based Store) provides reliable object storage functions for file system metadata and file data
• D.CA (Client Agent) is responsible for the semantic analysis of NFS/CIFS/FTP and other application protocols, and sends it to the underlying module for processing

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When the communication between MDC and OSD is interrupted or the OSD is faulty, the OSD exits the storage pool. Then the OSD out-of-service alarm is reported.
Which of the following are the possible causes of this fault? (Multiple Choice)

• A.A storage network exception occurs.
• B.The OSD software is abnormal.
• C.The disk in the server that houses the OSD is faulty.
• D.The NVDIMM in the server that houses the OSD is faulty.

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Huawei Oceanstor 9000 provides a single file system externally with a unified file system namespace. Which of the following descriptions about Oceanstor 9000 unified-namespace is incorrect?

• A.Each file sharing directory is a subdirectory of the namespace
• B.A unified name space provides users with a unified storage resource pool to achieve centralized management and allocation of storage space
• C.As the root directory of the entire system, the namespace cannot be shared and accessed, as long as the subdirectories below it can be shared and accessed
• D.The namespace is automatically created when Oceanstor 9000 is started, and its name is consistent with the system naming

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The following are the commands on the switch side to detect the network:
1) the display Inter command can be used to view the interface statistics and check whether the switch records the interface packet loss.
2) display logbuf, if discarding, pay attention to whether there is a loop in the back-end network.

• A.Both the two descriptions are correct
• B.The first one is correct, the second one is wrong
• C.Both are wrong
• D.The first one is wrong, the second one is correct

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InfiniBand can be used for communication between servers, between a server and a storage device, and between a server and a network.

• A.FALSE
• B.TRUE

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