A Cloud Virtual Machine (CVM) deployed on a CDH runs in a single-tenant environment, whereas a CVM instance is a physical server resource shared by multiple tenants. The CVM on a CDH supports custom specifications, whereas a CVM instance does not. Beyond that, they provide the same features.
If you select multiple CDHs when creating a CVM instance, it will be created on any one of these hosts.
You can customize the sizes of the system disk and data disk when creating a CVM instance. In addition to the planned disk storage, another 2 GB capacity is used to store additional configuration information.
Yes. To configure the CVM on a CDH, log in to the CVM console, locate the target CVM instance in the instance list, and click More > Resource Adjustment > Adjust Configuration in the Operation column. For more information, see CVM Configuration Adjustment.