Private
cloud is a type of cloud computing that delivers similar advantages to
public cloud, including scalability and self-service, but through a
proprietary architecture. Unlike public clouds, which deliver services
to multiple organizations, a private cloud is dedicated to a single
organization.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDNA6QxOsY45U5TVnDqIHwnzQWzS2sRjl9sSWEU-ZaKRlQZOBAw8fQLNCqW5EnpnsW_d6jLrphcv-FWYDkVy_lBcPtDq84XSggYuTrmyOXwD0kVgKbgO0ZsewTkq65cN0a8VxjvJ0GMnRg/s400/private-cloud.png)
Public and private cloud deployment models differ. Public clouds, such as those fromAmazon Web Services or Google Compute Engine,
share a computing infrastructure across different users, business units
or businesses. However, these shared computing environments aren't
suitable for all businesses, such as those with mission-critical
workloads, security concerns, uptime requirements or management demands.
Instead, these businesses can provision a portion of their existing
data center as an on-premises -- or private -- cloud.
A private cloud provides the same basic benefits of public cloud. These
include self-service and scalability; multi-tenancy; the ability to
provision machines; changing computing resources on-demand; and creating
multiple machines for complex computing jobs, such as big data. Chargeback tools track computing usage, and business units pay only for the resources they use.
In addition, private cloud offers hosted services to a limited number of
people behind a firewall, so it minimizes the security concerns some
organizations have around cloud. Private cloud also gives companies
direct control over their data.
But private clouds have some disadvantages. For example, on-premises IT
-- rather than a third-party cloud provider -- is responsible for
managing the private cloud. As a result, private cloud deployments carry
the same staffing, management, maintenance and capital expenses as
traditional data center ownership. Additional private cloud expenses
include virtualization, cloud software and cloud management tools.
However, to reduce an organization's on-premises IT footprint, cloud providers, such asRackspace and VMware, can deploy private cloud infrastructures.
A business can also use a mix of a private and public cloud services with hybrid clouddeployment.
This allows users to scale computing requirements beyond the private
cloud and into the public cloud -- a capability called cloud bursting.
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