# Add host pools (VDI)

To add a host pool:

1. In the RAS console, navigate to **Farm** > \<Site> > **VDIHost pools**.
2. Click the **Tasks** drop-down list above the **Host Pools** list and then click **Add** (or click the plus-sign icon). This opens the **Add VDI host pool** wizard.
3. Select **Enable Host pool in site** to enable the host pool. Specify the name and the description for the new host pool.
4. Click **Next**.
5. On the **Provisioning** page, select whether this host pool will contain template-based or standalone hosts:
   * **Template**: Hosts will be created dynamically from a template. You will need to create or select an existing template in the next step or later. Choosing **Template** as the provisioning type ensures a homogeneous host pool, which is recommended to provide consistent user experience across the host pool.
   * **Standalone**: Select one or more hosts that already exist. You'll be able to do it in the next step or you can do it later. Prior to adding hosts to host pools, ensure that hosts are domain joined and have network access to the domain environment. Note that the Standalone provisioning is considered "unmanaged" as it lacks some of the functionality, such as Autoscaling.
6. Depending on the selection made on the **Provisioning** page (above), do one of the following
   * **Standalone**: Select one or more hosts from the list to be included in the host pool (you can also add hosts to the pool later).
   * **Template**: Select a template from the list or click **Create new** to create a new template and specify the template settings. **Versions**: If you selected an existing template, select one of its versions.
7. Click **Next**.
8. (Templates only) On the **Provisioning** page, specify the following options:
   * **Template name**: Choose and type a template name.
   * **Host name**: A pattern to use when naming new hosts. For example, Windows10-RAS-%ID%.
   * **Number of hosts deployed on wizard completion**: The number of hosts to deploy once the template is created. Please keep in mind that this will take some time because the hosts will be created one at a time.
   * **Host state after the preparation**: Select the power state that should be applied to a host after it is prepared. Choose from **Powered on**, **Powered off**, or **Suspended**. Note that when the power state is set to **Power off** or **Suspended**, the number of running (fully ready and waiting for incoming connections) hosts is controlled by the **Keep available buffer** setting (see above). For example, let's say the **Maximum hosts** value is set at 200, the number of guest hosts deployed on wizard completion is 100, and the power state after preparation is **Powered off**. The result of such a configuration will be 100 clones deployed and powered off.
   * **Maximum hosts**: Specify the maximum number of hosts that can be created from this template.
   * (Only for templates created from VMware vCenter instances) Select one of the following:
     * If you want to create all hosts in the datastore that contains the template, select **Create hosts in the primary datastore**.
     * If you want to create hosts in several datastores, select **Create hosts in specific datastores**. If you select this option, you will be prompted to select the datastores in the **Datastores** list on the next page.&#x20;
   * (Only for templates created from AWS instances) **Virtual networks**: Select Availability Zones for the host pool. Choose from **Use the subnet associated with the template** and **Use specific subnets available in the VPC**. If you select **Use specific subnets available in the VPC**, then after clicking **Next** you can manaully select one or several Availability Zones.
   * **Autoscale settings**: Configure autoscale settings as described in [**Manage host pools (RD Session Hosts)**](/landing/ras-admin-guide/parallels-ras-21-administrators-guide/rd-session-hosts/manage-rd-session-hosts/manage-host-pools-rd-session-hosts.md).
9. Click **Next**.
10. On the **Host pool settings** page, specify the following options:
    * **On session**: Select when an action triggers.
    * **Perform action**: Select an action.
    * **After**: Select how much time must pass before action triggers.
11. Click **Next**.
12. On the **User profile** page, you can select from **Do not manage by RAS** (user profiles will not be managed) or **FSlogix**. Microsoft FSLogix Profile Container allows to maintain user context in non-persistent environments, minimize sign-in times and provides native profile experience eliminating compatibility issues. For complete instructions, please see [**User profile**](/landing/ras-admin-guide/parallels-ras-21-administrators-guide/rd-session-hosts/manage-rd-session-hosts/manage-hosts-rd-session-hosts/view-and-modify-rd-session-host-properties/user-profile.md).
13. Click **Next**.
14. (Standalone only) On the **Optimization** page, configure optimization as described in [**Optimization**](/landing/ras-admin-guide/parallels-ras-21-administrators-guide/rd-session-hosts/manage-rd-session-hosts/manage-hosts-rd-session-hosts/view-and-modify-rd-session-host-properties/optimization.md)**.**
15. On the **Summary** page, review the template summary information. You can click the **Back** button to correct some of the information if needed.
16. Finally, click **Finish** to create the host pool and close the wizard.


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