Dedicated Host:Create a DDH

Procedure

1. Log on to the ECS console.

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

3. In the upper-left corner of the page, select a region and resource group.

4. Click Create DDH.

   If this is your first time creating a dedicated host, click Create Now.

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

   Parameter	Description	Example
   Billing Method	Select a billing method. Valid values: Subscription and 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)
   Host Type	The dedicated host type determines the instance families and number of ECS instances that you can run on the DDH. Oversubscription-enabled host types let you customize the vCPU-to-memory ratio, offering more flexibility when you create ECS instances. For more information about dedicated host types, see Dedicated host types. Important ECS instances on local SSD-type DDHs, such as i2, cannot be manually or automatically migrated if the host fails. If a local SSD-type DDH fails, you can submit a ticket to request a manual migration, but note that data on the local disks will be lost after the migration.	Compute-optimized c7
   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 create based on your requirements.	1
   Other Settings	Only some dedicated host types support the following features. The availability of these features depends on the selected dedicated host type. Automatic Deployment: Enabled: The system automatically deploys ECS instances on the DDH. For more information, see Configure automatic deployment. Disabled: You must manually deploy ECS instances by specifying this DDH when you create an instance. Default: Enabled. Automatic migration on host failure: Enabled: If the DDH fails, its ECS instances are automatically migrated to a healthy host. Disabled: If the DDH fails, you must submit a ticket to request a replacement. Default: Enabled. You can change this setting after the DDH is created. For more information, see Configure automatic migration for a DDH. Important Local SSD-type DDHs do not support automatic migration on host failure. CPU oversubscription ratio: This parameter is available only for oversubscription-enabled host types. The CPU oversubscription ratio determines the number of available vCPUs on a DDH. The number of available vCPUs is calculated by using the following formula: Number of available vCPUs = Number of physical CPU cores × 2 × CPU oversubscription ratio. For workloads that are not sensitive to CPU performance stability, such as in development and testing environments, you can increase this ratio to get more vCPUs. This lets you deploy more ECS instances of the same specifications and reduces per-unit deployment costs. For example, a g6s dedicated host has 52 physical CPU cores. If you set the CPU oversubscription ratio to 4, the total number of vCPUs displayed after the DDH is created is 416. Important For more information about oversubscription-enabled host types, see Dedicated host types.	Keep the default settings.
   Duration	Select the subscription duration based on your requirements.	1 Month
   Terms of Service	Read and select the terms of service.	Select Dedicated Host Terms of Service.

6. Review the host configuration, read the terms of service, and click Confirm Order.

7. In the Confirm Order dialog box, verify the configuration details and click Create Order.

8. Follow the on-screen instructions to complete the payment.