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Dedicated Host:Create a dedicated host

Last Updated:May 24, 2024

You can select billing methods, regions, and host specifications based on your business requirements. This topic describes how to create a dedicated host in the Elastic Compute Service (ECS) console.


An Alibaba Cloud account is created and the required account information is provided. For more information, see Before you begin.


  1. Log on to the ECS console.

  2. In the left-side navigation pane, choose Instances & Images > icon1 > Dedicated Hosts.

  3. In the top navigation bar, select the region and resource group to which the resource belongs. 地域

  4. Click Create DDH.

  5. On the page that appears, configure the following settings.




    Billing Method

    You can choose between Subscription and Pay-as-you-go.

    For more information about billing, see Overview.


    Region and Zone

    The region and zone in which you want to create a dedicated host.

    For more information about regions and zones, see Regions and zones.

    China (Beijing)

    Dedicated Host Type

    The dedicated host type determines the instance family and the maximum number of ECS instances that you can deploy on the dedicated host. You can customize the vCPU-to-memory ratio for overprovisioned dedicated host types. This allows you to flexibly allocate computing resources when you create ECS instances.

    For more information, see Dedicated host types.


    ECS instances on local SSD type i2 dedicated hosts do not support self-service migration or automatic failover. If a local SSD dedicated host fails, you can

    submit a ticket to request a migration. However, the data on local SSDs will be lost after the migration.

    Compute Optimized Type c7

    Dedicated Host Name

    The name of the dedicated host. The name must be 2 to 128 characters in length, and can contain letters, digits, periods (.), underscores (_), colons (:), and hyphens (-). It must start with a letter.



    The number of dedicated hosts that you want to purchase.


    Other Settings

    Some features in this section may not be available to all dedicated host types. To view the features supported by your host, go to the DDH console.

    • Allow Automatic Deployment

      • If you select Allow Automatic Deployment, ECS instances are automatically deployed on dedicated hosts that have available resources. For more information, see Functions and features.

      • If you do not select Allow Automatic Deployment, you must specify a dedicated host when you create ECS instances.

      By default, Allow Automatic Deployment is selected.

    • Failover upon Host Failure

      • If you select Failover upon Host Failure, the ECS instances on the dedicated host are automatically migrated to a healthy dedicated host if the original dedicated host fails.

      • If you do not select this option, you must

        submit a ticket to apply for a new dedicated host if the original dedicated host fails.

      By default, the Failover upon Host Failure option is selected. You can change this setting after the dedicated host is created. For more information, see Configure auto failover.


      This feature is unavailable for dedicated hosts of the local SSD type.

    • CPU Overprovisioning Ratio: You can configure the CPU overprovisioning ratio only for the overprovisioned type. The CPU overprovisioning ratio affects the number of available vCPUs on a dedicated host. You can use the following formula to calculate the number of available vCPUs on a dedicated host of the overprovisioned type: Number of available vCPUs = Number of CPU cores × 2 × CPU overprovisioning ratio. In scenarios that do not require high CPU stability, such as development and test environments, you can increase the number of available vCPUs on a dedicated host by increasing the CPU overprovisioning ratio. This way, you can deploy more ECS instances of the same specification on the dedicated host and reduce the deployment cost.

      For example, the number of CPU cores on each g6s dedicated host is 52. If you set the CPU overprovisioning ratio of a g6s dedicated host to 4, the number of available vCPUs on the dedicated host is 416.


      For more information, see Dedicated host types.

    Keep the default settings.


    Select a subscription duration based on your business requirements.

    1 Month

    Terms of Service

    Read and select Dedicated Host Terms of Service.

    Select Dedicated Host Terms of Service.

  6. Click Preview.

  7. In the Preview dialog box, confirm the configurations and click Create Order.

  8. Complete the payment as prompted.


You can view the created dedicated host on the Host tab. If the dedicated host enters the Running state, it can be used as expected. If the created dedicated host does not appear on the Host tab, wait for a while and refresh the

What to do next

After a dedicated host is created, you can create ECS instances on the dedicated host. For more information, see Create ECS instances on a dedicated host.