Cloud computing can be divided into three different models: public, hybrid, and private. While the three models have common traits and also they have different key features that might make one model a better choice to meet your business’ IT needs.
Public cloud computing is the traditional model. In this model, vendors dynamically allocate resources (hard drive space, RAM, and processor power) on a per-user basis through web applications to the general public by a public cloud vendors and is hosted at the vendor’s premises. These services are free or offered on a pay-per-use model. Here the consumers doesn’t know where the infrastructure is hosted. Sales force and ADP are two vendors that offer public cloud computing services.
Public cloud service providers like Microsoft and Google own and operate the infrastructure and offer access only via Internet The computing infrastructure is shared between organizations.
- You can access unlimited data from anywhere as long as you have internet connection and a compatible device such as a smart phone or laptop computer.
- Public cloud computing is negotiable to meet your business’ growing data storage and processing needs.
Private cloud, also known as internal cloud computing, is more expensive and are considered more secure than public clouds. Private cloud is a cloud structure that runs alone for a single organization and can not be shared with other organizations.
There are two types of private clouds: On-premise private clouds and externally hosted private clouds. Externally hosted private clouds are also solely used by one organization, but are hosted by a third party specializing in cloud infrastructure. Externally hosted private clouds are cheaper than On-premise private clouds.
Increased data security, simple compliance enforcement, customized IT network control are the key characteristics of Private cloud.
Hybrid cloud is also known as cloud bursting. It is a combination of two or more clouds such as private and public clouds. In this model, all models are unique but bound together offering many benefits. Organizations and individuals use their computing infrastructure for normal usage but access the cloud for peak load requirements for handling gracefully.
When it comes to in-house applications, hybrid clouds may not be that effective. They generally lack flexibility, security, and certainty.
This architecture requires both on-premises resources and remote server based cloud infrastructure. To deploy hybrid cloud, organizations need both hardware and software for storing data, manipulating data and also to interact with the hosted solution.