Difference between public private hybrid community cloud types
There are four main types of cloud computing deployment models that organizations can choose from based on their specific needs and requirements. These models define how cloud resources are utilized, managed and shared. They are public, private, hybrid and community cloud types. They differ in terms of ownership and control, resource sharing, security and compliance, scalability, cost models and use cases.
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.
➨Advantages : Cost effective due to shared resources and pay as you go pricing, scalable to handle varying workloads, outsourced management and maintenance
➨Disadvantages : Less control over security and compliance, limited customization, potential performance variability due to shared resources
Example of Public cloud:
•Amazon elastic compute cloud (EC2) •IBM SmartCloud Enterprise•Google AppEngine
•Windows Azure Services Platform
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.
➨Advantages : Enhanced control over data management and security aspects, Customizable as per needs, Can adhere to strict regulatory compliance
➨Disadvantages : Higher upfront costs and maintenance charges, limited scalability compared to public clouds, reduced cost savings due to dedicated resources
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.
➨Advantages : Flexibility to choose where to run different workloads, optimized resource utilization and cost efficiency, redundancy and
disaster recovery options.
➨Disadvantages : Complex to setup and manage, requires careful planning for data synchronization and security, potential
integration challenges between public and private components.
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 ) .
➨Advantages : Cost savings, Collaboration and resource pooling among members, tailored to meet specific regulations
➨Disadvantages : Limited scalability based on size of community, potential challenges in coordinating governance and management
Following table summarizes difference between public cloud, private cloud, hybrid cloud and community cloud types.
| Parameters | Public cloud | Private cloud | Hybrid cloud | Community cloud |
|---|---|---|---|---|
| Ownership | Third party provider owns and operates | Single organization owns and operates | Mix of public and private organizations operate | Shared by multiple organizations |
| Resource sharing | Shared among multiple customers | Dedicated to single organization | Shares resources between public and private clients | Shared among a specific community |
| Security | Low, Provider handles security measures | Most secured, Enhanced control over security measures | Moderate, Security varies as per deployment models | Secured, Security considerations specific to the community |
| Customization | Limited | High level inclucing control | Customizable as per requirements | Tailored to meet specific community needs |
| Scalability | High | varies as per implementation | scalable as oer public cloud resources | as per community's collective needs |
| Data location | Data stored in provider's data centers | Data stored on premises or in data centers | Data can be distributed across environments | Data stored as per community's requirements |
| Cost model | Pay as you go pricing | Higher upfront costs and maintenance | Cost savings through resource optimization | Shared cost among community members |
| Compliance | Limited control over compliance requirements | Adaptable to meet strict compliance needs | Can adhere to industry specific regulations | Tailored compliance for community's needs |
| Complexity | Lower complexity | More complex | Moderate to high | Moderate |
| Use cases | General purpose applications, web hosting etc. | Sensitive data, compliance driven workloads | Data synchronization, bursting, disaster recovery | Collaborative efforts among community members |
| Access | Internet | Intranet, VPN | Intranet, VPN | Intranet, VPN |
| Reliability | Moderate | Very high | Medium to high | Very high |
| Examples | Amazon EC2, Google AppEngine | VMWare, Microsoft KVM, Xen | IBM, HP, VMWare vCloud, Eucalyptus | SaS Community cloud, VMWare |
Conclusion : Each cloud type has distinct advantages and considerations. Hence organizations can choose the deployment model that best aligns with their business goals, security requirements, resource constraints and cost.
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