Customer (Organization) Administrator Perspective
The primary Capacity Management concern of the organization administrator is Capacity Management of the organization’s organization virtual datacenters.
VMware recommends that all organizations establish a Capacity Management process based on a standard unit of consumption. The recommended base Unit of Consumption for each resource important to Capacity Management from an organization administrator perspective is shown in the following table.
Table 12. Organization Virtual Datacenter Units of Consumption
Attribute | Variable | Value |
vCPU | PUC | 1 GHz |
Memory | MUC | 1GB |
Storage | DUC | 10GB |
Taking this approach enables more efficient Capacity Management because the vApp component virtual machine resource allocations are predefined in the service catalog, resulting in vCloud infrastructure resource consumption being more accurately predicted.
Each organization is provided with a finite quantity of resources (in the cases of the Allocation Pool and Reservation Pool consumption models) from one or more provider virtual datacenters in the form of organization virtual datacenters. This means that as the organization consumes the organization virtual datacenter resources, a trigger point needs to be defined to prompt actions to be taken to expand the organization virtual datacenter.
First, the resource consumption limits for an organization’s organization virtual datacenters need to be defined, with these limits defining when action needs to be taken to remove the potential capacity issue.
Table 13. Recommended Organization Virtual Datacenter Capacity Thresholds
Attribute | Variable | Limit | Description |
Organization virtual datacenter CPU peak utilization | CCPULimit | 80% | The limit for allocating CPU resources within the organization virtual datacenter before expansion is required. This value varies depending on the consumption model used. From an organization virtual datacenter perspective, reservation values should be considered equal to the amount of CPU allocated as reservation values are not available to the organization administrator. |
Organization virtual datacenter memory allocation limit | CmemLimit | 80% | The limit for allocating memory resources within the organization virtual datacenter before expansion is required. This value varies depending on the consumption model used. From an organization virtual datacenter perspective, reservation values should be considered equal to the amount of memory allocated as reservation values are not available to the organization administrator. |
The CPU and m
emory resources vary depending on the size of the contracted organization virtual datacenter
. Table 14 provides an example of the resources needed to calculate the organization virtual datacenter’s capacity.
Table 14. Sample Organization Virtual Datacenter Resource Allocation
Item | Variable | Value | Units |
Total organization virtual datacenter vCPU Units of Consumption | Sorgvirtual datacenter | 50 | GHz |
organization virtual datacenter Memory Allocation in Units of Consumption | Morgvirtual datacenter | 64 | GB |
The number of capacity units available within this organization virtual datacenter is found using the following equations.
Determining organization virtual datacenter memory units of consumption
Based on the information from the above tables, the total memory unit of consumption for the organization virtual datacenter is calculated as shown below.
This results in 51.2 memory units of consumption for the sample organization virtual datacenter.
Determining organization virtual datacenter CPU units of consumption
Based on the information from the above tables, the CPU units of consumption per organization virtual datacenter are calculated as shown below.
This results in 40 CPU units of consumption for this sample organization virtual datacenter.
