Which of the following descriptions of DomainO design principles are correct:

A: The number of reserved VCPUs for DomainO needs to be consistent with its maximum number of VCPUs B: In the storage disaster recovery scenario, the memory size of DomainO needs to be increased on the original basis C: When the memory of a single server is less than 96GB, the DomainO memory size is set to 2GB D: When single server memory>192GB, DomainO memory size is: single server memory (GB) *0.2+8