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Difference between Public cloud vs private cloud vs hybrid cloud vs community cloud


This page on public cloud vs private cloud vs hybrid cloud vs community cloud storage covers difference between public,private,hybrid and community cloud storage types. Also refer following sub-topics of cloud storage tutorial.
Main Page of tutorial  What is Cloud Storage  Types  Infrastructure  How does it work  traditional storage vs cloud storage  Service providers  cloud storage security  cloud computing tutorial 


Cloud storage architecture is mainly divided into two parts viz. cloud storage service providers and users of cloud service. The data storage is provided by service providers and the same is used by different type of users.

Cloud storage delivery models are of four types:
➨Public Cloud
➨Private Cloud
➨Hybrid Cloud
➨Community Cloud

Public Cloud

public cloud

The public cloud is the one in which cloud infrastucture services are provided to general public or large industry group over internet. In this cloud model, the infrastructure is not owned by user but by the organization which provides the cloud services.

The storage backup and retrieval services in this model are provided without any cost or as subscription or based on used basis.

Example of Public cloud:
•Amazon elastic compute cloud (EC2) •IBM SmartCloud Enterprise•Google AppEngine •Windows Azure Services Platform

Private Cloud

private cloud

The private cloud is the one in which cloud infrastructure is set aside for exclusive use by single organization. It is owned, managed and operated by organization, third party or combination of both. The cloud infrastructure in this model is provisioned on the premises of organization but hosted in data center owned by third party.

In private cloud, organizations will have advantages over public cloud as it provides greater flexibility of control over cloud resources to them. Moreover private cloud is useful in the storage applications where in security, latency and regulatory issues are of utmost concern.

Hybrid Cloud

hybrid cloud

As the name suggests, hybrid cloud is the combination of other cloud models viz. public cloud, private cloud or community cloud. This model takes advantages of all the models which are part of it. Hence it will have scalability, cost effectiveness and data security all in one model.

The disadvantage of this model is difficulty in implementing such a storage solution.

Community Cloud

community cloud

The model type community cloud shares the cloud infrastructure across several organizations to support specific community having common concerns. In this model, cloud infrastructure is provided on the premises or at the data center owned by third party. This is managed by participating organizations or third party.

Community cloud takes benefits of both public cloud (e.g. minimal shared infrastructure costs, pay per use basis billing) as well as private cloud (e.g. added privacy level, policy compliance ) .

Following table summarizes difference between public cloud, private cloud, hybrid cloud and community cloud types.


Cloud Storage Type Host Owner Access Users
Public cloud service provider service provider Internet public as individuals, organizations
Private cloud Enterprise (Third Party) Enterprise Intranet, VPN Business organizations
Hybrid cloud Enterprise (Third Party) Enterprise Intranet, VPN Business organizations
Community cloud Community (Third party) Community Intranet, VPN Community members

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