Which are big data's characteristics defined by IDC? (Multiple Choice)

• A.Volume
• B.Value
• C.Velocity
• D.Variety

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When selecting storage devices, if the business requires a single hard disk IOPS greater than 3000, which of the following hard disk types are available for selection? (Multiple choice)

• A.SAS HDD
• B.NVMe SSD
• C.NL SAS HDD
• D.SAS SSD

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Users of HuaweiStorageSystem A are requesting higher performance for their OLTP application. The OLTP application is the only system using HuaweiStorageSystem A.
A colleague suggests improving performance by running SmartQOS on the LUNS involved, while decreasing the performance of other services:
This is;

• A.A solution, but not the best solution; SmartPartition would be better.
• B.Not a solution to the problem, the other services will no longer work correctly.
• C.A good solution for the problem; performance will improve.
• D.Not a solution for the problem, since there will be only one queue of I/O.

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Huawei Oceanstor 9000 integrates the hard disk resources of all nodes through DFS, providing a unified name space externally.

• A.True
• B.False

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Which of the following statements about remote replication consistency groups implemented by OceanStor V3 storage systems is false?

• A.One consistency group can contain both synchronous and asynchronous remote replications.
• B.A consistency group ensures the time consistency of mirrored data among multiple LUNs.
• C.All pairs in a consistency group are simultaneously synchronized f split, interrupted, or switched over.
• D.Regarding the remote replications in the same consistency group, all the primary LUNS must reside in the same storage array, and all the secondary LUNS must reside in the same storage array too.

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