Private And Public Cloud Model


Public Cloud allows systems and services to be easily accessible to general public. The IT giants such as Google, Amazon and Microsoft offer cloud services via Internet. The Public Cloud Model is shown in the diagram below.

Benefits
There are many benefits of deploying cloud as public cloud model. The following diagram shows some of those benefits:

Public Cloud Model Benefits
Cost Effective
Since public cloud shares same resources with large number of customers it turns out inexpensive.

Reliability
The public cloud employs large number of resources from different locations. If any of the resources fails, public cloud can employ another one.

Flexibility
The public cloud can smoothly integrate with private cloud, which gives customers a flexible approach.

Location Independence
Public cloud services are delivered through Internet, ensuring location independence.

Utility Style Costing
Public cloud is also based on pay-per-use model and resources are accessible whenever customer needs them.

High Scalability
Cloud resources are made available on demand from a pool of resources, i.e., they can be scaled up or down according the requirement.

Disadvantages
Here are some disadvantages of public cloud model:

Low Security
In public cloud model, data is hosted off-site and resources are shared publicly, therefore does not ensure higher level of security.

Less Customizable
It is comparatively less customizable than private cloud.

Private Cloud allows systems and services to be accessible within an organization. The Private Cloud is operated only within a single organization. However, it may be managed internally by the organization itself or by third-party. The private cloud model is shown in the diagram below.

Benefits
There are many benefits of deploying cloud as private cloud model. The following diagram shows some of those benefits:

High Security and Privacy
Private cloud operations are not available to general public and resources are shared from distinct pool of resources. Therefore, it ensures high security and privacy.

More Control
The private cloud has more control on its resources and hardware than public cloud because it is accessed only within an organization.

Cost and Energy Efficiency
The private cloud resources are not as cost effective as resources in public clouds but they offer more efficiency than public cloud resources.

Disadvantages
Here are the disadvantages of using private cloud model:

Restricted Area of Operation
The private cloud is only accessible locally and is very difficult to deploy globally.

High Priced
Purchasing new hardware in order to fulfill the demand is a costly transaction.

Limited Scalability
The private cloud can be scaled only within capacity of internal hosted resources.

Additional Skills
In order to maintain cloud deployment, organization requires skilled expertise.
Private And Public Cloud Model Private And Public Cloud Model Reviewed by Joseph on May 01, 2018 Rating: 5

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