Which of the following description of the applicable scenarios of file-level migration and block-level migration are correct? (Multiple choice)

• A.The destination partition structure of block-level migration needs to be consistent with the source side
• B.Block-level migration is suitable for hosts with low disk usage on the source side
• C.Block-level migration is suitable for hosts with a large number of small files on the source side
• D.File-level migration is suitable for scenarios that need to expand or reduce the capacity of the destination disk

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Regarding the HA configuration of the FusionCompute virtual machine, which of the following descriptions are correct? (Multiple choice)

• A.The host failure handling policy is set to restore the virtual machine on the original host. When the host where the virtual machine is located fails, the system will restart the virtual machine on the original host only after the host has recovered.
• B.The data storage failure processing policy is set to not process, if the data storage failure time exceeds the time set by "policy delay". The virtual machine will automatically shut down to avoid data corruption.
• C.The host fault handling policy is set to class virtual machine. When the host where the virtual machine is located fails, the system will re-select the host to start the virtual machine according to the virtual machine startup policy set in the cluster.
• D.The delay policy is configured. During the delay time, 1/0 of the virtual machine will be retransmitted in the backend driver.

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Huawei Manageone Servicecenter supports disaster recovery. The production site and the disaster recovery site automatically synchronize ServiceCenter data, and the disaster recovery site can be automatically started after a disaster occurs.

• A.True
• B.False

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When replacing a host in FusionSphere OpenStack, which roles need to be deleted on the new host?

• A.Host os
• B.FC-Nova-Compute
• C.Compute
• D.DHCP

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To which component does the desktop virtual machine send a registration request message for registration?

• A.HDA
• B.GaussDB
• C.HDC
• D.ITA

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