The deployment model is an important aspect of cloud computing. A cloud deployment model is a specific
configuration of the environment’s variables, including storage capacity, ownership of the deployment
infrastructure, and accessibility. This implies that deployment models employed by businesses are based
on the ownership (i.e who controls the infrastructure) as well as the location of the infrastructure. For
businesses to opt for the right one that suits them best, they will need to consider their computing,
networking, and storage requirements, available resources, and business goals, as well as the pros and
cons of cloud deployment models.
The four basic forms of cloud computing are private, public, hybrid, and community cloud model
Here we will discuss the various deployment models of the cloud as well as their benefits and drawbacks.
- Public Cloud:
Public Cloud is the most frequent and well-known deployment model. A Public Cloud is a massive
data center that provides the same services to all of its customers. The services are available to
everyone and are widely used by the consumer segment. There is no requirement for user
organizations to purchase and maintain their own hardware because server infrastructure belongs
to service providers that manage it and administer shared resources. Provider companies offer
resources as a service both free of charge or on a pay-per-use basis via the Internet. Users can
scale resources as required.
For companies with little privacy concerns, the public cloud deployment approach is the best
option. Examples of prominent public cloud deployment strategies include IBM Cloud, Salesforce
Heroku, Microsoft Azure, Google App Engine, and Amazon Elastic Compute Cloud (Amazon EC2,
the top service provider according to ZDNet).
Advantages of the public cloud model:
Little to no setup cost: The entire infrastructure is completely subsidized by the cloud
service providers, thus there is no need to set up any hardware.
High/Dynamic scalability. Cloud capacity can easily be extended by companies as their
capacity requirements increase i.e. on-demand resources are accessible.
No maintenance: The maintenance work is done by the service provider (Not users).
Infrastructure Management is not required: Using the public cloud does not necessitate
infrastructure management. Having a third party running your cloud infrastructure is
convenient: you do not need to develop and maintain your software because the service
provider does it for you. In addition, the infrastructure setup and use are uncomplicated.
Disadvantages of the public cloud model:
Concerns around Data security and privacy issues exist. Although data accessibility is
easy, a public deployment model denies subscribers of knowing where their information
is stored and who has access to the stored data. This model does not provide complete
protection against cyber-attacks and may expose weaknesses.
Compromised dependability. Because the same server network is accessible to a wide
range of users, public clouds is susceptible to outages and malfunction, which can cause a
storage collapse in some instances.
Absence of customized service. Service providers have only standardized service options,
which is why they often fail to satisfy more complex business requirements
- Private Cloud
The private cloud deployment model is the contrast to the public cloud deployment model. It’s a
one-on-one environment for a single user (customer) where hardware is not shared with any
other customer. Their architecture is similar but the major difference between private and public
clouds is in how the hardware is handled. The private Cloud is also referred to as the “internal
cloud” or “Corporate Cloud” & it refers to the ability to access systems and services within a given
border or organization.
The cloud platform is implemented in a cloud-based secure environment that is protected by
powerful firewalls and under the supervision of an organization’s IT department. Invariably, the
server can be hosted externally or on the premises of the owner company. Regardless of their
physical location, these infrastructures are maintained on a designated private network and use
software and hardware that are intended for use only by the owner company. The private cloud
gives the greater flexibility of control over cloud resources.
The private cloud offers more options for tailoring the infrastructure to the needs of the business
than the public model does. A private model is best suited for firms that want to protect their
mission-critical operations or for organizations with dynamic needs.
Advantages of the private cloud model:
Data Security and Privacy: It is appropriate for keeping company information that only
authorized personnel have access to. Improved access and security can be obtained by
segmenting resources within the same infrastructure.
Customization: Unlike a public cloud deployment, a private cloud allows a company to
tailor its solution to match its unique requirements.
Improved Control: Businesses with this model have complete authority over service
integration, IT operations, policies, and user behavior.
Supports Legacy Systems: This model is intended for use with legacy systems that cannot
connect to the public cloud.
Disadvantages of the private cloud model:
The primary downside of the private cloud deployment approach is the high cost of
hardware, software, and staff training. As a result, this safe and flexible computer
deployment strategy is not appropriate for small businesses.
- Hybrid Cloud
Hybrid cloud computing provides the best of both worlds by combining the finest elements of the public
and private worlds with a layer of proprietary software. It enables businesses to mix and match the
aspects of the two categories that best meet their needs. With a hybrid solution, you may host the app in a
secure environment while benefiting from the cost benefits of the public cloud. Depending on their needs,
organizations can migrate data and applications between clouds by combining two or more cloud
deployment strategies.
The hybrid cloud deployment model not only safeguards and controls strategically important assets but
does so in a cost- and resource-effective way. In addition, this approach facilitates data and application
portability.
Advantages of Hybrid Cloud model
Improved security and privacy: Because data is properly separated, the risks of data theft
by intruders are greatly decreased.
Enhanced scalability and flexibility: Businesses with more flexibility can design
personalized solutions or customized solutions that match their particular needs.
Reasonable price: Because public clouds provide scalability, you’ll only be responsible for
paying for the extra capacity if you require it.
Disadvantages of Hybrid Cloud model
This model can effectively work only if data is appropriately classified by companies.
Maintenance: A hybrid cloud computing strategy may require additional maintenance thereby
resulting in a greater operational expense for companies
Difficult Integration: Data and application integration may be difficult when building a hybrid
cloud. It’s also true that combining two or more infrastructures will offset a significant upfront
cost.
- Community Cloud
It enables a collection of businesses to access systems and services. It is a distributed system formed by
combining the services of many clouds to meet the special demands of a community, industry, or
enterprise. The community’s infrastructure might be shared by organizations with similar interests or
duties. It is often handled by a third party or a collaboration of one or more community organizations.
The sole difference between a community deployment approach and a private deployment methodology is
the collection of users. Whereas a private cloud server is owned by a single firm, a community cloud is
shared by multiple enterprises with similar histories.
If all of the participating enterprises have the same security, privacy, and performance criteria, this multi-
tenant data center design can assist these businesses to improve their productivity, as in collaborative
projects. A centralized cloud simplifies project planning, administration, and execution. All users
contribute to the costs.
Advantages of the community cloud model:
Cost Effective: It is cost-effective when compared to the Private cloud model because the cloud is
shared by multiple organizations or communities.
Improved security, privacy, and reliability: Community cloud provides better security when
compared with the public cloud model.
Shared resources: It allows you to share resources, infrastructure, etc. with multiple
organizations.
Ease of data sharing and collaboration: It is suitable for both collaboration and data sharing.
Disadvantages of the community cloud model:
High cost compared to the public deployment model
Sharing of fixed storage and bandwidth capacity
Not commonly used yet
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