VMware vCloud Director Essentials by Lipika Pal

Author:Lipika Pal
Language: eng
Format: mobi, azw3, epub, pdf
Publisher: Packt Publishing
Published: 2014-08-24T21:00:00+00:00

Organization vDC allocation model

When creating an organization vDC, choosing an appropriate allocation model is important. The allocation model determines not only the commitment of provider vDC resources toward organization vDCs, but also how the provider bills the customer for those resources.

You can choose from the following three models:

The pay-as-you-go model: This is the easiest model to understand and administer. The simplest way to think of pay-as-you-go is paying for what you get. When vApp powers on, the resources are committed. If vApp is not powered on, then the customer is not billed for resources. Even though the customer is billed as soon as vApp is powered on, only a percentage of the resources are guaranteed. If you want to create a high-tier service offering, the pay-as-you-go model allows the provider to increase the guaranteed resources. The pay-as-you-go model is the only model in which you can specify the speed of virtual CPUs in vApp.

The allocation pool model: This configures a virtual container of resources. The allocation pool model allocates a subset of resources, but it guarantees to a tenant only a percentage of what has been allocated. Thus, the provider has the ability to overcommit resources.

The reservation pool model: This configures a physical container of resources. Think of it as a model in which the customer rents hardware for their exclusive use. The reservation pool model should be the most expensive allocation model offered to customers. The customer is in complete control of the resources that they use, and all resources are guaranteed. The model also offers customers the greatest amount of control. They have the same controls that a vSphere administrator would have over resource pool settings. Thus, over commitment is possible, but it is controlled by the customer.

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