Dedicated Host:Create a dedicated host

Procedure

1. Log on to the ECS console.

2. In the left-side navigation pane, choose Instances & Images > > Dedicated Hosts.

3. In the top navigation bar, select the region and resource group of the resource that you want to manage.

4. Click Create DDH.

   If this is the first time you create a dedicated host, click Create Now.

5. On the creation page, configure the following parameters.

   Parameter	Description	Example
   Billing Method	Select a billing method: Subscription or Pay-as-you-go. For more information about billing, see Billing overview.	Subscription
   Region and Zone	Select the region and zone where you want to create the DDH. For more information about regions and zones, see Regions and zones.	China (Beijing)
   Dedicated Host Type	The dedicated host type determines the ECS instance families and the number of ECS instances that you can run on the DDH. For overprovisioned dedicated host types, you can customize the vCPU-to-memory ratio to flexibly allocate computing resources when you create ECS instances. For more information about dedicated host types, see Dedicated host types. Important ECS instances on local SSD type dedicated hosts (such as local SSD type i2) do not support self-service migration or automatic failover. If a local SSD type DDH fails, you can submit a ticket to request a manual migration. However, the data on local SSDs is lost after the migration.	Compute-optimized c7
   Dedicated Host Name	Enter a name for the dedicated host. The name must be 2 to 128 characters in length. It must start with a letter or a Chinese character and can contain digits, periods (.), underscores (_), colons (:), and hyphens (-).	DDH-test
   Quantity	Select the number of DDHs to purchase, as needed.	1
   Tag	A tag is a case-sensitive key-value pair. To manage DDHs by group, add tags to the DDHs. For more information, see Tags.	Keep the default value
   Resource Group	Resource groups allow you to group the cloud resources that you own based on dimensions such as purpose, permission, and owner. This facilitates resource management for multiple users and projects within an enterprise. You can add the DDH to a resource group as needed. For more information about the scenarios of resource groups, see Resource groups.	Keep the default value
   Other Settings	Only some dedicated host types support the following features. The features displayed on the page prevail. Allow Automatic Deployment: Allow Automatic Deployment: The system automatically deploys ECS instances on the DDH. For more information, see Configure automatic deployment. Disallow Automatic Deployment: You must manually deploy ECS instances on the DDH. When you create an ECS instance, you must specify a DDH. Default value: Allow Automatic Deployment. Failover upon Host Failure: Enable Automatic Migration upon Host Failure: If a DDH stops due to a failure, its ECS instances are automatically migrated to a healthy DDH. Disabled automatic migration for host failures: If a DDH fails, you must submit a ticket to request a healthy DDH as a replacement. Default value: Enable Automatic Migration upon Host Failure. You can also modify this configuration after the DDH is created. For more information, see Configure automatic migration upon breakdown. Important Local SSD-equipped DDHs do not support automatic migration upon host failure. CPU Overprovisioning Ratio: Only overprovisioned dedicated host types support CPU overprovisioning. The CPU overprovisioning ratio affects the number of available vCPUs on a DDH. The number of available vCPUs on a DDH = Number of physical CPU cores × 2 × CPU overprovisioning ratio. For scenarios that do not require high CPU stability, such as development and test environments, you can increase the overprovisioning ratio. This increases the number of available vCPUs, which lets you deploy more ECS instances of the same type and reduces the unit deployment cost. For example, a g6s dedicated host has 52 physical CPU cores. If you set the CPU overprovisioning ratio to 4, the total number of vCPUs is 416 after the DDH is created. Important For more information about overprovisioned dedicated host types, see Dedicated host types.	Keep the default value
   Duration	Select a subscription duration as needed.	1 month
   Auto-renewal	Select whether to enable auto-renewal. Monthly subscription: The auto-renewal period is one month. Yearly subscription: The auto-renewal period is one year.	Disabled

6. Review the configurations, read and agree to the terms of service, and then click Preview.

7. Follow the on-screen instructions to complete the creation process.