1.2 Deployment Model
The following figure illustrates several deployment models for cloud computing.
For enterprises, the focus is on private and hybrid vCloud
environments.
For service providers, the focus is on public and hybrid vCloud
environments.
Figure 1. Deployment Models
The following are the commonly accepted definitions for cloud computing deployment models:
Private vCloud – The vC
loud infrastructure is operated solely for an organization and can
be managed by the organization or a third party. The infrastructure can
be located on-premises
or off-premises.
Public vCloud – The vC
loud infrastructure is made available to the general public or to a large industry group and is owned by an organization that sells vCloud services.
Hybrid vCloud – The vCloud
infrastructure is a composite of two or more vCloud
instances (private and public) that remain unique entities
but are bound together by standardized technology. This enables data and application portability,
for example, cloud bursting for load balancing between vCloud
instances. With a hybrid vC
loud, an organization gets the advantages of both, with
the ability to burst into the public vCloud when needed while maintaining critical assets on-premises.
Community vCloud – The vCloud infrastructure is shared by several organizations and supports a specific community that has shared concerns, such as
mission, security requirements, policy, and compliance considerations
. It can
be managed by the organizations or a third party, and can
be located
on-premises
or off-premises.
This document covers the following private, public, and hybrid vCloud deployment models:
Private vCloud – E
nterprise IT as a provider of vCloud services to consumers.
Hybrid vCloud – Enterprise IT as a consumer of public vCloud services,
extending
its own private capacity.
Public vCloud – S
ervice provider IT as a provider of vCloud services to a number of enterprise consumers.
Community vCloud service definition considerations and examples are not covered..