Which three data centers refers to 3DC in the disaster recovery solution? (Multiple choice)

• A.City Disaster Recovery Center
• B.Production Center
• C.Remote disaster recovery center
• D.Data Center

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In an Internet company's storage system, two businesses, A and B, are constantly competing for cache and network resources, causing other businesses to wait longer. In order to solve this problem, it is necessary to configure cache partition and flow control technology. Among them, business A is a transaction processing application, business B is an analytical query application, and it needs to ensure that business A responds immediately.
So how to configure it reasonably? (Multiple Choice)

• A.Configure the QoS priority of service B to be higher than service A
• B.Configure service A to have a higher QoS priority than service B
• C.When configuring the cache partition, the corresponding cache of B business is larger than the corresponding cache of A business
• D.When configuring the cache partition, the cache corresponding to service A is larger than the cache corresponding to service B

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SmartThin is a storage space management technology provided by Huawei OceanStor V3 storage system that allocates storage resources on demand. Based on virtualization technology, SmartThin reduces the deployment of physical storage resources and maximizes the utilization of storage space.

• A.False
• B.True

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The lowest level of disaster tolerance during backup.

• A.False
• B.True

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Which of the following are the business models of cloud computing? (Multiple choice)

• A.PaaS
• B.MaaS
• C.SaaS
• D.IaaS

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