Cloud Computing Models
In the previous blog, we discussed the basics of cloud computing and the attributes that define a cloud compute model. Let us now look at some of the commonly used cloud computing models that are being adopted industry wide.
[caption id="attachment_137" align="aligncenter" width="300" caption="Four main deployment models of Cloud Computing"][/caption]
Technically there are three different types of cloud computing models.
Going back to our blog article (2), Cloud Computing is the methodology of providing on demand IT resources to customers satisfying the key attributes of elasticity, ubiquitous computing, utility model, self provisioning and available on demand.
Now based on the location of the technology supporting the cloud, the ‘compute\' models have been characterized as a public cloud or a private cloud or a hybrid cloud or a community cloud.
Public Cloud :
When the cloud computing infrastructure is located beyond the premises of the enterprise, and is accessed through a network which is either public or private in nature then such a model is called as a Public Cloud. Usually Public Clouds are provided by hosting centers and like. The access is provided through a secure connection on the public internet. The provider typically hosts cloud infrastructure for multiple organizations and provides Infrastructure as a Service, Platform as a Service or Software as a Service or a combination of any of these services to use the system. The best example for a Public Cloud model is the Amazon EC2 Cloud System. The user could purchase either a machine or a platform for a fee and continue to use it as desired and Amazon would provide a monthly bill.
Private Cloud :
When the cloud computing infrastructure is located within the premises of the enterprise, and is accessed through a secure private network then this type of model is termed as a private cloud. This is very beneficial for organizations who want to maximize the use of their resources and at the same time feel secure that their data is not leaving the enterprise\'s physical boundaries. These type of models are more prevalent when businesses in organizations pay for their IT resource usage. These type of systems are made possible by tools like VSPhere.
Hybrid Cloud :
When an enterprise decides to have a combination of a public, private or community cloud computing models for its needs then such a model is termed as a hybrid cloud.
Community Clouds :
When different organizations come together to satisfy their cloud computing requirements to achieve common goals like security or software versions then such a model is termed as community cloud.
Each model has its positives and negatives. What is important is that all of them provide the facility to adopt a cloud computing model to satisfy a particular organization\'s needs. An organization has to approach this model strategically to decide what is good for its needs. There are multiple integrators available to assist in the transition to the cloud.
One of the biggest and perhaps the most successful providers in the market today is Amazon. With it proprietary EC2 system, Amazon provides a host of functionalities and machine templates to easily provision servers and storage in a very short period of time. Through rigorous testing and development Amazon is now also hosting ERP software like SAP.
WFTCloud is one of the integrating solutions of bringing SAP on to the Amazon Cloud. The reason this organization has chosen SAP is due to its progression from an SAP infrastructure integrator to a cloud solution orchestrator.
In the next article we will delve more on SAP on the cloud as well as the challenges organizations have in moving this to the cloud and how WFT plays on important role in this.
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About the Author
WFTCloud is an initiative from Wharfedale Technologies, Inc to provide SAP access to its customers on a pay per use model. WFTCloud provides SAP systems on the cloud to end users using state of the art solutions. The company is located at New Jersey USA, providing SAP services to North America.
The company began its operations in year 2000 with a seed capital of 2 MM dollars.