Cloud Deployment Models

In cloud computing, we have access to a shared pool of computer resources (servers, storage, programs, and so on) in the cloud. You simply need to request additional resources when you require them. Getting resources up and running quickly is a breeze thanks to the clouds. It is possible to release resources that are no longer necessary. This method allows you to just pay for what you use. Your cloud provider is in charge of all upkeep. It functions as a virtual computing environment with a deployment architecture that varies depending on the amount of data you want to store and who has access to the infrastructure. 

Deployment Models 

The cloud deployment model identifies the specific type of cloud environment based on ownership, scale, and access, as well as the cloud’s nature and purpose. The location of the servers you’re utilizing and who controls them are defined by a cloud deployment model.

Different types of cloud computing deployment models are:

1. Public cloud 
2. Private cloud
3. Hybrid cloud
4. Community cloud
5. Multi-cloud 

Public Cloud 

The public cloud makes it possible for anybody to access systems and services. The public cloud may be less secure as it is open to everyone. The public cloud is one in which cloud infrastructure services are provided over the internet to the general people or major industry groups. The infrastructure in this cloud model is owned by the entity that delivers the cloud services, not by the consumer. It is a type of cloud hosting that allows customers and users to easily access systems and services. This form of cloud computing is an excellent example of cloud hosting, in which service providers supply services to a variety of customers. In this arrangement, storage backup and retrieval services are given for free, as a subscription, or on a per-user basis. Example: Google App Engine etc.

Advantages of Public Cloud Model:

• Minimal Investment: Because it is a pay-per-use service, there is no substantial upfront fee, making it excellent for enterprises that require immediate access to resources.
• No setup cost: The entire infrastructure is fully subsidized by the cloud service providers, thus there is no need to set up any hardware.
• Infrastructure Management is not required: Using the public cloud does not necessitate infrastructure management.
• No maintenance: The maintenance work is done by the service provider (Not users).
• Dynamic Scalability: To fulfill your company’s needs, on-demand resources are accessible. 

Disadvantages of Public Cloud Model:

• Less secure: Public cloud is less secure as resources are public so there is no guarantee of high-level security.
• Low customization: It is accessed by many public so it can’t be customized according to personal requirements. 

Private Cloud 

The private cloud deployment model is the exact opposite of the public cloud deployment model. It’s a one-on-one environment for a single user (customer). There is no need to share your hardware with anyone else. The distinction between private and public clouds is in how you handle all of the hardware. It is also called the “internal 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. The private cloud gives greater flexibility of control over cloud resources.

Advantages of Private Cloud Model:

• Supports Legacy Systems: This approach is designed to work with legacy systems that are unable to access the public cloud. 
• Customization: Unlike a public cloud deployment, a private cloud allows a company to tailor its solution to meet its specific needs.

Disadvantages of Private Cloud Model:

• Less scalable: Private clouds are scaled within a certain range as there is less number of clients.
• Costly: Private clouds are more costly as they provide personalized facilities.

Hybrid Cloud 

By bridging the public and private worlds with a layer of proprietary software, hybrid cloud computing gives the best of both worlds. With a hybrid solution, you may host the app in a safe environment while taking advantage of the public cloud’s cost savings. Organizations can move data and applications between different clouds using a combination of two or more cloud deployment methods, depending on their needs. 

Advantages of Hybrid Cloud Model:

• Flexibility and control: Businesses with more flexibility can design personalized solutions that meet their particular needs.
• Cost: 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:

• Difficult to manage: Hybrid clouds are difficult to manage as it is a combination of both public and private cloud. So, it is complex.
• Slow data transmission: Data transmission in the hybrid cloud takes place through the public cloud so latency occurs.

Community Cloud

It allows systems and services to be accessible by a group of organizations. It is a distributed system that is created by integrating the services of different clouds to address the specific needs of a community, industry, or business. The infrastructure of the community could be shared between the organization which has shared concerns or tasks. It is generally managed by a third party or by the combination of one or more organizations in the community. 

Advantages of Community Cloud Model:

• Cost Effective: It is cost-effective because the cloud is shared by multiple organizations or communities.
• Security: Community cloud provides better security.
• Shared resources: It allows you to share resources, infrastructure, etc. with multiple organizations.
• Collaboration and data sharing: It is suitable for both collaboration and data sharing.

Disadvantages of Community Cloud Model:

• Limited Scalability: Community cloud is relatively less scalable as many organizations share the same resources according to their collaborative interests. 
• Rigid in customization: As the data and resources are shared among different organizations according to their mutual interests if an organization wants some changes according to their needs they cannot do so because it will have an impact on other organizations.

Multi-cloud 

We’re talking about employing multiple cloud providers at the same time under this paradigm, as the name implies. It’s similar to the hybrid cloud deployment approach, which combines public and private cloud resources. Instead of merging private and public clouds, multi-cloud uses many public clouds. Although public cloud providers provide numerous tools to improve the reliability of their services, mishaps still occur. It’s quite rare that two distinct clouds would have an incident at the same moment. As a result, multi-cloud deployment improves the high availability of your services even more. 

Advantages of a Multi-Cloud Model:

• You can mix and match the best features of each cloud provider’s services to suit the demands of your apps, workloads, and business by choosing different cloud providers. 
• Reduced Latency: To reduce latency and improve user experience, you can choose cloud regions and zones that are close to your clients. 
• High availability of service: It’s quite rare that two distinct clouds would have an incident at the same moment. So, the multi-cloud deployment improves the high availability of your services. 

Disadvantages of Multi-Cloud Model:

• Complex: The combination of many clouds makes the system complex and bottlenecks may occur.
• Security issue: Due to the complex structure, there may be loopholes to which a hacker can take advantage hence, makes the data insecure.