A.There is no need to deploy the image-cache partition when deploying the cinder-volume host

B.A set of cinder-volume (at least one node) connected to only one storage pool

C.HBA card is required when connecting to FC--SAN. In this scenario, cinder-volume can be deployed in virtual In the virtual host

D.cinder-volume can only be deployed on the control node

A.If the virtual machine is bound to an "independent persistent" or "independent non-persistent" disk and the disk is deleted, the disk does not exist on the virtual machine recovered from the snapshot

B.If the virtual machine is bound to an "independent persistent" or "independent-non-persistent" disk, the data on the disk will not be affected after the power is turned off or the snapshot is restored.

C.If you select "Independent-Persistent" or "Independent-Non-Persistent", the data of the disk density will not be snapshotted when creating a snapshot of the virtual machine. When restoring a virtual machine using a snapshot, the data on that disk is not restored.

D.If a virtual machine is bound to an "independent persistent" or "independent-non-persistent" disk, after creating a snapshot of the virtual machine, the disk is unbound and not bound to other virtual machines, the virtual machine restored from the snapshot will be reset The disk is set, but the disk data is not restored.

A.As long as resources are reserved in the cluster, when a fault occurs, the virtual machine with HA attribute can be successfully rebuilt on other computing nodes.

B.The virtual machine HA function can quickly restore services when a failure occurs.

C.When the system detects a virtual machine blue screen and the configuration processing policy is HA, the system will select other normal computing nodes to rebuild the virtual machine.

D.After the HA function is enabled in the cluster, after the host fails, the virtual machine can be rebuilt on other hosts.

A.After the security group is deleted, all security group rules in the group are deleted at the same time

B.The authorization behavior between the security group to be deleted and other security groups does not affect the deletion operation.

C.There is no virtual machine in the security group. If there is a virtual machine in the security group, you need to move the virtual machine out of the security group.

D.Except for a security group to which the virtual machine belongs, other security groups do not affect the virtual machine.

A.2000M

B.10. 5G

C.OG890M

D.10G500M