This topic describes the limits of dedicated hosts.

The limits for using dedicated hosts are listed in the following table. In addition, the limits on Elastic Compute Service (ECS) resources also apply to ECS instances that are created on dedicated hosts. For more information, see Limits of ECS resources.
Item Description How to apply for an increase of the service limit
Create dedicated hosts

Before creating dedicated hosts in a mainland China region, you must complete real-name verification.

N/A
Supported network types Virtual private clouds (VPCs). For more information about VPC, see What is a VPC?. N/A
Restrictions of billing methods for dedicated hosts and ECS instances

You can create pay-as-you-go or subscription ECS instances on subscription dedicated hosts.

N/A

Create subscription ECS instances on a subscription dedicated host

The expiration date of subscription ECS instances cannot be later than the expiration date of the dedicated host. N/A

Renew subscription ECS instances on a subscription dedicated host

When you renew subscription ECS instances, the expiration date of subscription ECS instances cannot be later than the expiration date of the dedicated host. Dedicated hosts that fail to meet this requirement cannot be auto-renewed. N/A
Switch the billing method from pay-as-you-go to subscription for ECS instances on a dedicated host

When you switch the billing method, the expiration date of subscription ECS instances cannot be later than the expiration date of the dedicated host.

N/A
Change the billing method of dedicated hosts Not supported. N/A
Migrate ECS instances between a shared host and a dedicated host

Only pay-as-you-go ECS instances can be migrated. Subscription ECS instances and preemptible instances cannot be migrated.

N/A
Migrate ECS instances between different dedicated hosts You can only migrate ECS instances between dedicated hosts of the same type under the same account. ECS instances that run on dedicated hosts with local SSDs cannot be migrated. For more information about dedicated host types, see Dedicated host types. N/A