Session 5. Mixing and matching Public, Private and Hybrid Clouds for maximum benefits
Best of both/ Best of all regarding specific needs, based on the use of resources Hybrid cloud is simply a mix of private and public clouds. As it can be seen the root idea in this case is to combine the multiple (at least two) public and private clouds into one working unit. Hybrid cloud's infrastructure consists of two or more individual cloud types (private, community or public). They create a mix of internally and externally hosted services. Those clouds remain unique units, but they are connected together by standardized or proprietary technology enabling the data and application portability.
The hybrid cloud is a composition of two or more clouds (public, private or community) Sensitive applications are handled in an internal private cloud while others are practiced in a public cloud A primary advantage of a hybrid cloud model is that an organization only pays for extra compute resources when they are needed Such models remain in the separate places, have their own ID assigned, but are bound together into one unit. Such cloud environment is very popular in business, where most of customers want to have some control over quality of the provided cloud and hardly accept the fully dependence from cloud provider. A hybrid cloud may offer the standardized or proprietary access to data and applications, as well as application portability.
The hybrid model offers a variety of advantages, which are incorporated from both private and public models. The most key features for most of the companies are maintenance of relatively high level of security while maintaining price at reasonable level. Using this model an enterprise is able to keep its critical data and applications behind the firewall within the private cloud, while the less important resources may be placed in public unit. Another important factor forcing many companies to use hybrid solution is that private cloud is able to maintain high services availability by scaling up system with externally provisioned resources from a public cloud when there are rapid workload fluctuations or hardware failures.
This model handles cloud bursting where an application run in private cloud and bursts into public cloud when demand for its services spikes suddenly. This way an organization has to pay for additional resources only when load spikes occur and not having to maintain a larger infrastructure constantly. Hybrid cloud providers are: 3S, Beyond (Poland-based companies) or IBM Smart Cloud Foundation or Amazon Web Services (global solutions). Other examples of hybrid clouds include Windows Azure and VMware vcloud.
Public administrations prefer deploying cloud as private cloud model because: Higher security and privacy: Private cloud operations are not available to general public and resources are shared from distinct pool of resources, therefore, ensures high security and privacy. More control: Private clouds have more control on its resources and hardware than public cloud because it is accessed only within an organization. Cost and energy efficiency: Private cloud resources are not as cost effective as public clouds but they offer more efficiency than public cloud.