Oceanstor 9000 uses the InfoTier water level threshold to limit file storage and re-striping. When configuring InfoTier, select Spill over. Other parameters are default. Which of the following statements is correct?

• A.When the used space accounts for 90% of the total storage space of the node pool, data can still be written to the node pool
• B.When the used space accounts for 85% of the total storage space of the node pool, the system reports a read-only alarm
• C.When the used space accounts for 90% of the total storage space of the node pool, the system reports an insufficient capacity alarm
• D.When the used space accounts for 85% of the total storage space of the node pool, data can still be written to the node pool

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In Oceanstor 9000, if the data protection level is set to 4+2, the corresponding metadata will generate 3 identical images.

• A.True
• B.False

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What method is used by the OceanStor 9000 object storage service (compatible with Amazon S3) to store and search data?

• A.URL
• B.DHT
• C.K-d tree
• D.Directory tree

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Huawei's SmartPartition feature supports not multiple options for setting the same read and write cache capacity for partitions. Which of the following about the impact of cache capacity on services with different features are correct? (Multiple choice)

• A.For the read business, more cache capacity means a higher read hit rate
• B.For random services, a larger cache capacity means a better order of access to disks, which leads to improved performance
• C.For write business, more cache capacity means higher write consolidation rate, write hit rate and better access order
• D.For sequential services, the cache capacity does not need to be large, it only needs to meet the I/O consolidation requirements

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Huawei Oceanstor 9000 also needs to apply for some temporary IP addresses for the back-end business network during the software installation process. Which descriptions of these temporary|P addresses are correct? (Multiple choice)

• A.If the cluster has 6 nodes, you need to apply for 6 P addresses
• B.It does not matter if these temporarily planned back-end storage network IP addresses overlap with the actual planned back-end storage network IP addresses of the nodes.
• C.Need to specify which node to use an IP address
• D.After the software is installed, these addresses will be deleted automatically

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