Elastic Compute Service (ECS) instances that run on dedicated hosts are similar to ECS instances that run on shared hosts.

The following table lists the differences.
Item ECS instances on shared hosts ECS instance on dedicated hosts
Supported network types Virtual private clouds (VPCs) and the classic network. For more information, see Network types of ECS. VPCs.
Billing item For more information, see Billing overview. For more information, see Resource billing for ECS instances on a dedicated host.
Billing methods

Subscription, pay-as-you-go, and preemptible instances.

Subscription.

Renew subscription instances You can specify the renewal period based on your business requirements. The expiration date of an instance after renewal cannot be later than the expiration date of the subscription dedicated host. For more information, see Limits.
No fees for stopped instances For more information, see No fees for stopped VPC instances. If the No fees for stopped instances feature is enabled, resources of the dedicated host, such as the vCPUs and memory, are released when an instance is stopped. The resources of the dedicated host are reallocated when the instance is restarted. For more information, see Billing of stopped ECS instances on dedicated hosts.
Switch the billing method from pay-as-you-go to subscription

The instance must meet the prerequisites before switching. For more information, see Switch the billing method from Pay-As-You-Go to Subscription.

In addition to these prerequisites, the expiration date of subscription ECS instances cannot be later than the expiration date of the dedicated host.
ECS instance families For more information, see Instance families. For more information about ECS instance families that are supported by DDH, see Dedicated host types.
Create an ECS instance For more information, see Create an ECS instance. For more information, see Create an ECS instance on a dedicated host.
Change the specifications of an ECS instance For more information, see Change configurations. For more information, see Upgrade or downgrade a subscription ECS instance.
Adjust Internet bandwidth For more information, see Adjust Internet bandwidth. For more information, see Adjust Internet bandwidth.
Assign public IP addresses For more information, see Assign a public IP address. For more information, see Assign a public IP address.
Release ECS instances
  • Pay-as-you-go ECS instances support manual and automatic release. For more information, see Release an instance.
  • A subscription ECS instance is automatically released if its subscription expires. A pay-as-you-go ECS instance is automatically released if you do no clear overdue payments within the allotted time.
If a subscription dedicated host is not renewed after expiration, ECS instances on the host are automatically released.