Deployment Models

One of the most important model in the cloud services is – delivery models

1. Public Clouds: Public Clouds, also called as the real cloud by some purists, is the availability of cloud infrastructure to general public and accessible through the Internet. The infrastructure is owned by 3rd party service provider and is present outside the firewall of organizations using it. Multi-tenancy is the key differentiating factor here, which results in what we now call as Cloud Economics.

2. Private Clouds: Private Clouds are cloud infrastructure operated solely for an organization either by the IT of the organization or 3rd party. The infrastructure can be present inside of the organization’s firewall or operated in a 3rd party datacenter. Cloud economics will not be in play here but organizations can take advantage of other cloud characteristics like better utilization and elasticity.

3. Community Clouds: Community Clouds are cloud infrastructure shared by different organizations that supports specific community or verticals with shared needs. One or more of the participating organizations or a 3rd party may manage the infrastructure. The infrastructure can be present either inside the firewall or with 3rd party datacenters.

4. Hybrid Clouds: Hybrid Clouds are cloud infrastructure made up of two or more clouds (public, private, community) with one of them leveraged from a public cloud provider. These are independent cloud deployments that are bound together by standardized or proprietary technology that enables data and application portability. Usually, enterprises with a private cloud infrastructure tap into public clouds to push certain non-critical workloads in order to meet their sudden resource requirements