3. Choosing a vCloud Consumption Model : 3.1 Consuming vCloud Services
3.1 Consuming vCloud Services
The following vCloud service offerings apply to both private and public vCloud, but each has a different impact on consumption. Choose the service offering that best supports your use cases.
*Basic service offering (unreserved pay-per-use class) – Designed for quick-start pilot projects and workloads, such as software testing, that do not need reservations or guaranteed performance.
*Committed service offering (subscription model) – Provides reserved compute resources with the ability to burst above committed levels if additional capacity is available. It offers predictable performance by reserving resources for workloads within a multitenant infrastructure while enabling access to more resources as they become available.
*Dedicated service offeringProvides dedicated compute resources, sometimes known as a virtual private cloud. It offers predictable performance by reserving dedicated resources. This service offering can help to support SLAs for Tier 1 applications. Under this service offering, end users with appropriate privileges have flexibility in modifying compute allocations to the vApps and virtual machines.
Service classes are designed to help consumers move their workloads to a vCloud. Any existing VMware virtual machine or virtual application (vApp) can be run with little or no modification in a public vCloud. Compatibility with existing enterprise VMware deployments is a key design objective. There is no requirement to deploy a private vCloud to realize the benefits of vCloud computing because any VMware-based virtualized infrastructure is compatible.
All vCloud consumption models are fundamentally based on vCloud Director allocation models, regardless of the name or branding attached to a given service offering.