Cloud deployment models
Includes a combination of public, private, community, and traditional IT (enterprise) data-centers. Technically, when you connect one cloud to another cloud, or you connect to legacy datacenters and applications, you then have a hybrid cloud.
In essence a Hybrid Cloud usually begins as a Private Cloud that later extends integration to use one or more Public Cloud Service, or Platform offerings. Such a deployment model makes sense when firms have sensitive data that cannot be Cloudified, or regulatory requirements mandating data protection, storage and privacy protection [some FSA and other legislation makes it a requirement to have a physically available data center that can be audited, within a certain region or geography].
A cloud infrastructure operated for a single organization. The cloud can be managed by the organization or a third party, and it can be hosted on premises or at a third-party datacenter. Private clouds are typically more customizable than other forms of clouds because they are dedicated to and owned by one customer organization. Many private clouds are deployed within an existing on-premises datacenter.
Virtual private cloud (VPC)
A variation of public cloud wherein a segmented compartment of an otherwise public cloud infrastructure is dedicated to one customer. VPC offerings bring some of the price advantages of a large public cloud provider but with a bit more customization, security, and segmentation of VMs, storage, and networking. Variations of VPC include managed and unmanaged VMs and application services.
A cloud service offered to the general public. The cloud provider owns, manages, and operates all computing resources located within the provider’s facilities. Resources available to users are shared across all customers. Some cloud providers now offer higher, government- compliant security upgrades, which might use physically separate resources within provider data-centers. Customization is limited because the cloud is shared across many customers.
Hybrid cloud combining the above models
A cloud service that is a combination of two or more of the previously defined deployment models (public, private, VPC, or community). A common example is a private cloud that is connected to one or more third-party public-cloud service providers for certain applications such as email—all integrated by using a common cloud management and automation platform. To manage multiple cloud providers, a cloud management system or cloud-broker system is required.