What is the health status of the Huawei Oceanstor 9000 system cluster? (Multiple choice)

• A.Downgrade
• B.Normal
• C.Failure
• D.Partial damage

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Compared with traditional RAID algorithms, the erasure code redundancy technology used by Huawei OceanStor 9000 provides higher reliability and more flexible redundancy policies.
Which of the following statements about the erasure code N+M principle is false?

• A.Data to be written is divided into N data blocks of the same size.
• B.In erasure code storage mode, the storage system tolerates a concurrent failure of N disks at most.
• C.The erasure code algorithm calculates M parity blocks for every N consecutive data blocks. (The value of M is smaller than that of N.)
• D.N+M data blocks are concurrently stored to different disks.

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An enterprise application was backed up as follows: On February 1 (Feb1), full backup of all files and directories was implemented. On February 2 (Feb2), 3 (Feb3), and 4 (Feb4), cumulative incremental backup was implemented. On February 5, service disks failed.
If the enterprise wane to restore the application to the state preserved on February 4, which backup files are needed?

• A.Feb1+Feb2+Feb3+Feb4
• B.Feb1+Feb4
• C.Feb1+Feb2
• D.Feb1+Feb3

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OceanStor 9000 object storage service (compatible with Amazon S3 APIs and OpenStack Swift APIs) provides RESTful APIs externally. Clients can store data to the storage nodes through the RESTful APIs.

• A.FALSE
• B.TRUE

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Which of the following statements is incorrect about the scenario where one primary backup domain and multiple branch backup domains exist?

• A.The primary backup domain periodically collects metadata of branch backup domains. When the branch backup domain restores connection with the primary backup domain, the metadata transmission automatically restores.
• B.Each branch backup domain works independently. If a branch backup domain is disconnected from the primary backup domain, backup jobs of the branch backup domain are not affected.
• C.After a remote client is registered with the primary backup domain as an unconfigured client, the client can be hidden and grouped.
• D.Multiple branch backup domains are integrated into a primary backup domain, allowing you to centrally view operation reports of each backup domain in the primary backup domain.

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