About Purchase

Can I Scale Down CBH Specification When I Make a Purchase?

Rollback or scale-down of CBH instance specifications is not supported.

For details, see Changing Specifications of a CBH Instance.

How Do I Select a Region and AZ for a CBH Instance?

A region is a geographic area. Multiple data centers are required across regions to provide large bandwidth. Different regions are available for a service. It is recommended that you select the region nearest to your end users.

CBH allows you to directly manage resources in the same VPC and region. Resources in the same VPC and region can directly communicate with each other.

VPCs in different regions or different VPCs in the same region cannot communicate with each other through the intranet. Therefore, when purchasing a CBH instance, you are advised to configure the CBH instances and related resources such as ECSs in the same VPC and region. In addition, you are advised to select the same region and AZ as those of the selected VPC when configuring the AZ for the instance to reduce network latency.

If you cannot select an AZ when purchasing a CBH instance, you can select another AZ in the same region. For example, if AZ1 in the CN-Hong Kong region is not available, you can select AZ2 in the CN-Hong Kong region.

Can I Change the Security Group After a CBH Instance Is Created?

No. To modify VPC configurations, unsubscribe from the CBH instance and buy another one.

Can I Change the VPC and Its CIDR Blocks After a CBH Instance Is Created?

No. To modify VPC configurations, unsubscribe from the CBH instance and buy another one.

Can I Delete the admin Account After a CBH Instance Is Created?

User admin is the CBH system administrator and has the highest operation permissions so it cannot be deleted.

• However, the admin account can be locked out. For details, see How Do I Set a Security Lock for Logging In to the CBH System?