As the cloud paradigm grows in depth and breadth, more readers are approaching the topic for the first time, or from a new perspective. This blog is a basic review of cloud deployment models, to help orient newcomers and neophytes.
Most cloud deployments today are either private or public. It
is also possible to connect a private cloud and a public cloud to form a hybrid
A private cloud is for the exclusive use of an organization.
Enterprises, universities and government agencies throughout the world are
using private clouds. Some have designed, built and now manage their private
clouds. Others use a private cloud that was built by and is now managed by a
provider, hosted either onsite or at the provider’s datacenter. Because private
clouds are for exclusive use, they are usually the option chosen by
organizations with concerns about data security and guaranteed performance.
Public clouds are open to anyone with an Internet
connection. Because they require no capital investment from their users, they
are particularly attractive to companies with limited resources in less
regulated environments and for temporary workloads such as development and test
environments. Public clouds offer a
range of products, from end-user software packages to more basic services such
as databases or operating environments.
Public clouds may also offer cloud services such as a
disaster recovery for a private cloud, or the ability to “cloudburst” a
temporary workload spike from a private cloud to a public cloud. These are
examples of a hybrid cloud. These are most feasible when the private and public
clouds are built with similar technologies.
Usually people think of a public cloud in terms of a user
role, e.g., “Which public cloud should I consider using?” But someone needs to
own and manage that public cloud. The company who owns and operates a public
cloud is known as a public cloud provider. Oracle Database Cloud Service,
Amazon RDS, database.com and Savvis Symphony Database are examples of public
cloud database services.
When evaluating deployment models, be aware that you can use
any or all of the available options. Some workloads may be best-suited for a private cloud, some for a public
or hybrid cloud. And you might deploy
multiple private clouds in your organization. If you are going to combine multiple clouds, then you want to make sure
that each cloud is based on a consistent technology portfolio and architecture. This simplifies management and gives you the
greatest flexibility in moving resources and workloads among your different
Oracle’s portfolio of cloud products and services enables
both deployment models. Oracle can
manage either model. Universities,
government agencies and companies in all types of business everywhere in the
world are using clouds built with the Oracle portfolio. By employing a consistent portfolio, these
customers are able to run all of their workloads – from test and development to
the most mission-critical -- in a consistent manner: One Enterprise Cloud,
powered by Oracle.