Configure the allocation model to specify the amount of provider virtual datacenter resources to allocate to the organization virtual datacenter.

Procedure

  1. Select the allocation model options.

    Not all of the models include all of the options.

    Option

    Action

    CPU allocation

    Enter the maximum amount of CPU, in GHz, to allocate to virtual machines running in the organization virtual datacenter. This option is available only for Allocation Pool and Reservation Pool allocation models.

    CPU resources guaranteed

    Enter the percentage of CPU resources to guarantee to virtual machines running in the organization virtual datacenter. You can overcommit resources by guaranteeing less than 100 percent. This option is available only for Allocation Pool and Pay-As-You-Go allocation models. The default value for Allocation Pool is 50 percent, and the default for Pay-As-You-Go is 20 percent. For an Allocation Pool allocation model, the percentage guarantee also determines what percentage of the CPU allocation is committed for this organization virtual datacenter.

    vCPU Speed

    Enter the vCPU speed in GHz. Virtual machines running in the organization virtual datacenter are assigned this amount of GHz per vCPU. This option is available only for Allocation Pool and Pay-As-You-Go allocation models.

    Memory allocation

    Enter the maximum amount of memory, in GB, to allocate to virtual machines running in the organization virtual datacenter. This option is available only for Allocation Pool and Reservation Pool allocation models.

    Memory resources guaranteed

    Enter the percentage of memory resources to guarantee to virtual machines running in the organization virtual datacenter. You can overcommit resources by guaranteeing less than 100 percent. This option is available only for Allocation Pool and Pay-As-You-Go allocation models. The default for Allocation Pool is 50 percent, and the default for Pay-As-You-Go is 20 percent. For an Allocation Pool allocation model, the percentage guarantee also determines what percentage of the memory allocation is committed for this organization virtual datacenter.

    Maximum number of VMs

    Enter the maximum number of virtual machines that can be created in the organization virtual datacenter.

  2. Click Next.

Configuring an Allocation Model

When you create an organization virtual datacenter, vCloud Director creates a vSphere resource pool based on the allocation model settings you specify.

Table 1. How Allocation Pool Settings Affect Resource Pool Settings When Single Cluster Allocation Pool is Enabled

Allocation Pool Setting

Allocation Pool Value

Resource Pool Setting

Resource Pool Value

CPU Allocation

25GHz

CPU Limit

25GHz

CPU % Guarantee

10%

CPU Reservation

2.5GHz

Memory Allocation

50 GB

Memory Limit

50GB

Memory % Guarantee

20%

Memory Reservation

10GB

Table 2. How Allocation Pool Settings Affect Resource Pool Settings When the Single Cluster Allocation Pool feature is Disabled

Allocation Pool Setting

Allocation Pool Value

Resource Pool Setting

Sub-Resource Pool Value

Committed Value for this Org VDC Across All Subresource Pools

CPU Allocation

25GHz

CPU Limit

Sum of the number of vCPU times vCPU frequency for all associated virtual machines

N/A

CPU % Guarantee

10%

CPU Reservation

Sum of the number of vCPU times vCPU frequency times percentage guarantee for CPU for all associated virtual machines

2.5GHz

Memory Allocation

50GB

Memory Limit

Sum of the configured memory size for all associated virtual machines

N/A

Memory % Guarantee

20%

Memory Reservation

Sum of the configured memory size times the percentage guarantee for memory for all associated virtual machines

10GB

Table 3. How Pay-As-You Go Settings Affect Resource Pool Settings

Pay-As-You-Go Setting

Pay-As-You-Go Value

Resource Pool Setting

Resource Pool Value

CPU % Guarantee

10%

CPU Reservation, CPU Limit

0.00GHz, Unlimited

Memory % Guarantee

100%

Memory Reservation, Memory Limit

0.00GB, Unlimited

Resource pools created to support Pay-As-You-Go organization virtual datacenters never have reservations or limits. Pay-As-You-Go settings affect only overcommitment. A 100 percent guarantee means overcommitment is impossible. The lower the percentage, the more overcommitment is possible.

Table 4. How Reservation Pool Settings Affect Resource Pool Settings

Reservation Pool Setting

Reservation Pool Value

Resource Pool Setting

Resource Pool Value

CPU Allocation

25GHz

CPU Reservation, CPU Limit

25GHz, 25GHz

Memory Allocation

50GB

Memory Reservation, Memory Limit

50GB, 50GB