The backup solution can prevent the loss of production data or the data center suffers a devastating disaster, the recovery time is short, and the business continuity is guaranteed.

• A.False
• B.True

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Which of the following statements are wrong about the implementation principle of file system snapshots? (Multiple choice)

• A.When creating a file system snapshot, because the snapshot is stored in a new location, the write operation will affect the write performance of the storage LUN
• B.The core technology of file system snapshot implementation is ROW
• C.File system snapshot is a copy of data generated by the source file system at a certain point in time
• D.After the file system snapshot is successfully created, if the file system user wants to access the snapshot, he must remount the snapshot directory to access it

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After the Hadoop service is interconnected with the OceanStor 9000 through the HDFS API, what data redundancy and protection mechanism is adopted?

• A.Cubic RAID
• B.Erasure Code
• C.RAID 2.0+
• D.Duplicate mechanism

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To create two LUNs with each a different RAID level, hot spare policy, and a specific tiering policy, how many disk domains are required as a minimum?

• A.None of the answers is true.
• B.3
• C.4
• D.2

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Which advantages does Huawei OceanStor 9000 cluster NAS technology have over traditional NAS storage systems? (Multiple Choice)

• A.Scalable scale-out engine architecture
• B.Multi-node clustering, load balancing, and global cache, providing excellent performance
• C.Rapid service switchover, preventing the failure of a single node in a cluster from affecting services
• D.Heterogeneous SAN storage can be connected to an engine cluster

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