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vCloud Private Service

  • This service is given by Vmware to Cloud providers, allowing them (the cloud providers) to sell cloud services to customers

Use Cases

  • there are three types of cloud services uses, from a customer perspective, in terms of resource utilization:
    • High elasticity: bursty
    • Transient state: occasional bursty, seasonal, event-based (like pre-holiday periods)
    • Steady state: predictable amount of data and resources, mission-critical data. This is common for most companies
  • With each of these use cases, there’s a service offering and a correspondant Allocation Model

Private Cloud Service Offerings
  • Basic: customer is charged on VM basis, and per hour of usage
  • Committed: Customer has a guaranteed percentage and a total allocation value. when customer resource usage bursts, it can reach up to the total allocation value but no more. This is only possible if there are available shared resources of course.
  • Dedicated: customer has dedicated resources for his cloud environment, i.e. no other customers shares them with him. Besides, customer has complete control over his resources

Cloud Consumption/Allocation Models
Allocation models map to each service offering and to each use case. With each model, the provider creates an allocation threshold (resource usage limit) and a guarantee threshold (resource usage reservation)
  • Allocation Pool
    • customer has a resource reservation set (kind of a minimum guaranteed). If resource utilization exceeds the limit, the customer is charged for that.
    • the vSphere Admission Control feature ensures that, before each VM is started, it has enough resources

    • Pay-as-you-Go (PAYG) model
      • customer is charged only when vApps are deployed to his Org vDC
      •   limits and reservations are set at the VM level only:
          • there can only be reservations for memory,
          • there can be reservations and limits set for CPU


      • Reservation Pool
        • the allocation and the guarantee are set at the resource pool level (think REServation pool > RESource pool)
        • resources are consumed as long as there still are resources in the resource pool
        • the max number of VMs is dictated by the amount of resources in the resource pool of the Org vDC 

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