A cloud deployment model specifies how resources within the cloud are shared. Cloud deployment refers to the enablement of SaaS (software as a service), PaaS (platform as a service) or IaaS (infrastructure as a service) solutions that may be accessed on demand by end users or consumers.
From a business aspect, there are four different cloud deployment models which you can consider. This include:
- Private cloud,
- Public cloud,
- Community cloud and
- Hybrid cloud.
Each of these cloud models influences the corresponding key IT considerations, that include:
- Security and
Furthermore, redundancy, cost benefits from resource pooling, outsourced server management and low cost of entry are also the key business consideration. Following are the advantages and disadvantages of each of the four cloud deployment models:
Cloud Deployment Model: Private Cloud
The Private Cloud is owned by a specific entity and normally used only by that entity or one of its customers. The underlying technology in private cloud may reside on- or off-site. A private cloud offers increased security at a greater cost.
Private cloud solutions utilize infrastructure that is either owned and controlled by the organization, or they are able to contractually require those specific criteria be met by a vendor who manages the infrastructure.
Advantages of Private Cloud:
- Offers greater Security and Privacy.
- Offers more control over system configuration as per the company’s need.
Disadvantages of Private Cloud:
- Expensive when compared to public cloud.
- Requires IT Expertise.
Cloud Deployment Model: Public Cloud
The Public Cloud is available for use by the general public. It may be owned by a large organization or company offering cloud services. Becuase of its openness, the Public cloud network may be less secure, as compared to the Private Cloud. However, a public cloud is usually the least expensive solution.
Public cloud solutions are readily available from Google, Amazon, Microsoft, and others. Public cloud services are design to provide infrastructure and services to the public, and you, or your organization. Resources are shared in the public cloud by hundreds or thousands of people. Gmail email service from Google is one such good example of public cloud services.
Advantages of Public Cloud:
- Besides being a cost-effective solution it also offers greater scalability. Moreover, It offers reliability which means no single point of failure will interrupt your business critical services.
- Services like Software as a service (SaaS), Platform as a service (Paas), and Infrastructure as a service (Iaas) are easily available on Public Cloud platform as it can be accessed from anywhere through any Internet-enabled devices.
Disadvantages of Public Cloud:
- Public Cloud networks lack complete flexibility for new hardware expansion or integration as the platform depends on the platform provider.
- However, it is not recommended to use Public Cloud Network for the use of sensitive applications, as it provides no control over privacy and security.
Cloud Deployment Model: Community Cloud
The Community cloud is a fairly a new concept, where a cloud is being shared by two or more organizations (typically with shared business goals or concerns) and may help both the organization through cost benefits from resource pooling, outsourced server management and low cost of entry in the cloud.
Examples of Community cloud networks include such as schools within a university. The University of Illinois at Urbana-Champaign makes use of and facilitates the use of, cloud services for faculty, students, and staff.
Cloud Deployment Model: Hybrid Cloud
A Hybrid Cloud deployment model consists of two or more private, public or community clouds. Deploying a Hybrid cloud benefit the organization by offering scalability, reliability, security, and cost. This helps companies to maximize their efficiency and deliver better performance to clients.
In this hybrid model, companies can use the public cloud for transfer of non-confidential data and switch on to private cloud in case of sensitive data transfer or hosting of critical applications.
This model of cloud computing is gaining prominence in many businesses as it gives benefits to all the three other cloud deployment models. However, very few vendors actually provide a full end-to-end hybrid cloud solution.
Many offer critical pieces of the full solution that make them powerhouses in the hybrid cloud. Here are the top vendors in this space.
- Amazon Web Services,
- Microsoft Azure,
- VMware’s vSphere,
- Google Cloud Platform,
- Cisco Intercloud Fabric,
- Oracle Cloud, Rackspace, and IBM Bluemix.
Advantages of Hybrid Cloud:
- It is scalable and cost-efficient.
- It offers better security.
Disadvantages of Hybrid Cloud:
- Infrastructure Dependency.
- The possibility of a security breach through the public cloud.