Compute Resources

You can manage compute resources for a desktop manager on the Compute Resources tab.

This tab shows the vCenter controlled by this desktop manager. It is only possible to assign one vCenter to any given desktop manager.

After a new Desktop Manager has been created, assign a Compute Resource and Resource Manager by doing one of the following.

• In most cases, assign a Compute Resource on the Compute Resources tab. When you do this, the system assigns the Resource Manager that is managing that Compute Resource to the Desktop Manager.
• If you are upgrading and have a Compute Resource managed by multiple Resource Managers, then attempting to assign the Compute Resource first fails. In this case, you must assign the Resource Manager first on the Desktop Manager's General tab and then assign an available Compute Resource on the Compute Resources tab.

Important: If both tenant appliances have been restored, you must reassign any Compute Resources to the tenant appliances. See Reassign a Compute Resource to a Tenant below.

Assign a Compute Resource to a Tenant

After a vCenter gets added as a desktop compute resource, it appears in the Available Compute Resources section of the Compute Resources tab.

Note: You cannot remove compute resources after they have been assigned.

To assign a compute resource to a tenant:

1. In the Available Compute Resources section, click Assign to assign the Virtual Center.

2. Select a compute resource in the Desktop Compute Resources dialog box.

   A capacity dialog box appears for the compute resource you selected.

3. Edit information as described in the following table.

   Field	Description
   Failover Hosts	Number of hosts 100% reserved for disaster recovery. This value must be lower than the value for Hosts Detected. If multiple hosts are detected, the default value is 1. If a single host is detected, the default value is 0.
   Host Headroom Percent	For the remaining hosts (those hosts not designated as Failover Hosts), enter the percentage of capacity to reserve for disaster recovery. The default value is 20. The value for Memory Available is equal to Memory Installed reduced by the percentage you enter for Host Headroom Percent. The value for CPUs Available is equal to CPUs Installed reduced by the percentage you enter for Host Headroom Percent.
   Memory Over allocation Ratio	This ratio determines the amount of virtual machine memory that the compute resource can allocate. For example, if the ratio is 4.0 and the memory capacity of the compute resource is 64 GB, then it supports up to 256 GB of virtual machine memory. The default value is 1.5.
   Virtual to Physical CPU Ratio	This ratio determines the number of virtual machine CPUs that the compute resource can allocate. For example, if the ratio is 8.0 and the number of physical CPU cores on the compute resource is 8, then it supports up to 64 virtual machine CPU cores. The default value is 10.
   Share this Compute Resource	To share the compute resource between two or more tenants, select this check box. Note: that this option must be selected at assignment time and cannot be changed later.
   Usage	Select one or more of the three options (Service, Tenant, Network). Select Service to install Service Provider and Resource Manager appliances on the cluster. Select Tenant to install Tenant and additional Desktop Manager appliances on the cluster. Select Network to install Network appliances like Unified Access Gateway and NSX Edge Gateway on the cluster. If you only have one cluster, select all three options.
   GPUs Frame Buffer Installed	The framebuffer installed on the compute resource cluster.

4. Click Save.

   If this compute resource is shared, the Partitioned Compute Resource dialog box displays. In this dialog box, set partition sizes for Memory and CPU, and click Save.

   Note: You can later view and edit these settings on the Quotas tab when editing a tenant.

Reassign a Compute Resource to a Tenant

After a vCenter is assigned, a reassign option appears. You can use this button to add a compute resource.

Note: You cannot remove compute resources after they have been assigned.

To reassign compute resources assigned to your tenant:

1. In the Assigned Compute Resources section, click Reassign next to the VCenter.

2. Select a compute resource in the Desktop Compute Resources dialog box.

   A capacity dialog box appears for the compute resource you selected.

3. Edit information as described in the following table.

   Field	Description
   Failover Hosts	Number of hosts 100% reserved for disaster recovery. This value must be lower than the value for Hosts Detected. The default value is 1.
   Host Headroom Percent	For the remaining hosts (those not designated as Failover Hosts), enter the percentage of capacity to reserve for disaster recovery. The default value is 20. The value for Memory Available is equal to Memory Installed reduced by the percentage you enter for Host Headroom Percent. The value for CPUs Available is equal to CPUs Installed reduced by the percentage you enter for Host Headroom Percent.
   Memory Over allocation Ratio	This ratio determines the amount of virtual machine memory that the compute resource can allocate. For example, if the ratio is 4.0 and the memory capacity of the compute resource is 64 GB, then it supports up to 256 GB of virtual machine memory. The default value is 1.5.
   Virtual to Physical CPU Ratio	This ratio determines the number of virtual machine CPUs that the compute resource can allocate. For example, if the ratio is 8.0 and the number of physical CPU cores on the compute resource is 8, then it supports up to 64 virtual machine CPU cores. The default value is 10.
   Usage	This setting indicates the purpose of the compute resource. You can select one or more of the following. Service - Compute to be used for Service and Management type VMs: Service Provider, Resource Managers, Tenant Appliances, Desktop Managers, vCenter appliances, Time Servers, NSX Controllers. Tenant - Compute to be used by tenants for their desktop service: Desktop Pool VMs, App Farm Server VMs, Unified Access Gateway appliances, AD and DHCP servers, and so on. Network - Compute resource role normally combined with Tenant Compute.
   GPUs Frame Buffer Installed	The framebuffer installed on the compute resource cluster.

4. Click Save.

   If this compute resource is shared, the Partitioned Compute Resource dialog box displays. In this dialog box, set partition sizes for Memory and CPU, and click Save.

   Note: You can later view and edit these settings on the Quotas tab when editing a tenant.

Unassign a Compute Resource from a Tenant

After the vCenter is assigned, an unassign option appears. You can use this option to remove a vCenter that was previously assigned.

To unassign a vCenter:

1. Select the Compute Resources tab.
2. In the Assigned Compute Resources section, click Unassign next to the Virtual Center.

After a vCenter is assigned, expanding the Desktop Managers tree displays the vCenter. Clicking on items in the tree under the vCenter shows information as described in Working with Compute Resources.