Explain Cloud Deployment Models.

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 Cloud Deployment Models

The National Institute of Standards and Technology (NIST) identifies four cloud deployment modes public clouds, private clouds, community clouds, and hybrid clouds. A cloud deployment paradigm is characterized by where the infrastructure for the deployment is located and who controls that infrastructure. Choosing a deployment model is one of the most significant cloud deployment decisions you will make.

Each cloud deployment model addresses distinct organizational demands; thus, you must select a that addresses your organization's demands. Perhaps more importantly, each cloud deployment option has a particular value proposition and expenses associated with it. As a result, in many circumstances, your choice of a cloud deployment architecture may simply be a matter of cost. In any event, to make an informed selection, you must be familiar with the peculiarities of each setting.

Cloud deployment models describe how consumers can access cloud services. Following are the four cloud computing deployment models:

  • Public Cloud
  • Private Cloud
  • Community Cloud
  • Hybrid Cloud


Public Cloud

As the name implies, this sort of cloud deployment architecture caters to all customers who wish to subscribe to a computational resource, such as hardware (OS, CPU, memory, storage) or software (application server, database). Public clouds are most commonly used for application development and testing, non-mission critical functions such as file sharing, and e-mail service. Businesses that operate in industries with low privacy concerns choose to use the public cloud deployment strategy. The vast majority of public clouds contain large quantities of accessible space, allowing for simple expansion. For software development and collaborative projects, a public cloud is frequently recommended. Companies can create portable apps so that a project tested in the public cloud may be moved to the private cloud for production.

Popular cloud deployment strategies include Amazon Elastic Compute, Google AppEngine, IBM Blue, Microsoft Azure, Salesforce Heroku, and others.


The advantages of a public cloud are:

  • Unsophisticated setup and use
  • Easy access to data
  • Flexibility to add and reduce capacity
  • Cost-effectiveness
  • Continuous operation time
  • 24/7 running
  • Scalability
  • Eliminated need for software

The disadvantages of a public cloud:

  •  Data security and privacy
  • Compromised reliability
  • The lack of an individual approach

Private Cloud

  •  A private cloud, as the name implies, is primarily an infrastructure utilized enterprises.
  • Such infrastructure may be maintained by the organization itself to accommodate diverse user groups, or it may be maintained by a service provider on-site or off-site. Because of the financial investment required to acquire and operate private clouds, they are more expensive than public clouds. Private clouds, on the other hand, are more suited to handle enterprises' security and concerns today.
  • The cost of using public clouds is often minimal for the end-user, and no capital expenditure is required Because of the increased level of consolidation and resource pooling provided by private clouds, capital investment is required, but it is still less than the cost of owning and managing the infrastructure. In addition, private clouds provide additional security and compliance assistance than public clouds. As a result, some businesses may prefer to employ private clouds for mission-critical, secure applications and public clouds for basic functions like application development and testing environments and e-mail services.
  • Private solutions are also built by several service providers, including Amazon, IBM, Cisco, De and Red Hat. CloudBOX is a proprietary cloud solution developed by SaM solution.

The advantages of a private cloud: 

  • Individual development
  • Storage and network components are customizable High control over the corporate information
  • High security, privacy, and reliability

The disadvantages of a private cloud:

  • Cost intensiveness entails considerable expenses on hardware, software, and staff training.
  •  Not in the choice of small to medium companies.
  •  Only suitable for companies that seek to safeguard their mission-critical operations



COMMUNITY CLOUD

  • The sole difference between a community cloud deployment architecture and a private one is the collection of users. While a private type means that just one firm owns the server, a community type means that numerous firms with comparable backgrounds share the infrastructure and associated resources. Because enterprises have standardized security, privacy, and performance needs, this multi-tenant data center design assists businesses in meeting their business-specific goals. As a result, a community model is ideal for companies that collaborate on joint initiatives.
  • A community cloud helps project creation, administration, and implementation in this situation. Furthermore, the expenditures are shared by all users. This deployment strategy allows several organizations to share computer resources that are part of a community: for example, colleges working in certain areas of study or police forces within a country or state sharing computing resources. Access to a community cloud environment is often restricted to community members.

The advantages of a community cloud: 

  • Cost reduction
  • Improved security, privacy, and reliability 
  • Ease of data sharing and collaboration

The disadvantages of community cloud: 

  • Higher cost than that of a public one
  • Sharing of fixed storage and bandwidth capacity
  •  It is not widespread so far


Hybrid Cloud

  • A hybrid cloud, as is typical of any hybrid phenomena, combines the finest aspects of the three cloud computing deployment paradigms stated above - public, private, and community. It enables businesses to mix and matches the aspects of all three categories that best fit their needs.
  • A hybrid cloud is one in which an enterprise uses integrated private and public cloud infrastructure. Many businesses utilize this technique when they need to rapidly scale up their IT infrastructure, such as when using public clouds to complement the capacity available in a private cloud. For example, if an online store requires additional computer resources to run its web applications during the holiday season, such resources may be obtained through public clouds.
  • A corporation, for example, can balance its workload by placing mission-critical tasks on a secure private cloud and distributing fewer sensitive ones to a public cloud. It not only protects and controls strategically vital assets, but it does it in the most cost- and resource-effective manner feasible for each scenario. This method also makes data and application mobility easier.

The advantages of a hybrid cloud:

  • Improved security and privacy 
  • Enhanced scalability and flexibility



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