There are four ways to deploy and integrate cloud services into your application architecture and infrastructure:
Public Cloud
Private Cloud
Hybrid Cloud
Community Cloud
Public Cloud:
The public cloud is the most common approach that is open to all organizations. All resources, such as servers and disks, are owned and managed by the cloud provider in the public cloud. Microsoft Azure is an example. The cloud service provider carries out the maintenance, operation, and monitoring. The physical hardware is shared with other organizations, and your view is virtualized. Your data is secure and isolated. However, the cloud provider decides where it is stored and where your logic runs. The primary advantage of this approach is the lower cost, scalability, and flexibility. You are only required to pay for what you use, you scale on demand based on your need, and there is no need to purchase and maintain expensive hardware.
Why Public Cloud?
Several applications allow you to use the public cloud:
Service Consumption – Service consumption through an on-demand or subscription model charges you only for the CPU usage, storage, and other resources that you have used or reserved for use in the future
No hardware requirement – With the public cloud, there is no requirement to purchase, maintain, or manage the physical architecture and infrastructure
Automation – It provides a quick response by using a web portal or scripts
Geographical distribution – With this cloud approach, you can store data in the location nearest to your user without having to maintain data centers
Minimize Hardware Monitoring – You are free from hardware maintenance with a public cloud, as the service provider is responsible for this.
Private Cloud:
The second approach is called a private cloud. This is where computing resources are used exclusively by a business or organization. It can be physically located on-premises or managed by a cloud provider. The maintenance, operation, and monitoring come under the private network owned by that organization. In addition to scalability and reliability, it has very high-level security. Microsoft Azure supports a private cloud through Azure Stack, bringing Azure infrastructure into your own data center. A private cloud allows for more security and control. This might be necessary for legal compliance.
For example: government agencies or financial institutions may have more stringent data storage requirements that require a private cloud.
Why Private Cloud?
Several applications allow you to use the private cloud:
Pre-Existing Environment – Private cloud allows using an existing operating environment with solution expertise
Legacy Application – Private cloud can be used to handle business-critical legacy applications
Data Authority and Security – This cloud can be used to secure data
Hybrid Cloud:
A hybrid cloud allows a user to access both public and private cloud resources within a single access environment. In a hybrid cloud, some of your data and applications run on your private infrastructure and some run in Azure on the public cloud. This cloud model can be used in various ways, such as a migration approach to gradually transition your app and services out of your private data center into Azure. This allows for better testing and easier migration. This cloud model can also be used for segmenting work. You can connect to the environment together with a secure private network to pass data back and forth. Part of the data is processed in your private local infrastructure, and the rest is processed in the cloud. In this case, the hybrid cloud can be used for cloud bursting. You can upload work to the cloud whenyour internet data center hits the maximum workload. You can then scale and burst up workloads to leverage Azure and then drop back down to internal resources when the load returns to normal.
Why Hybrid Cloud?
Several applications allow you to use a hybrid cloud:
Existing Hardware Investment – Most businesses prefer to use their existing hardware and operating environment
Use for Regulation – Most regulatory frameworks require their data to remain physically located.
Easy Migration – With this cloud, you can shift data from on-premises to the cloud when required
Community Cloud:
This model allows the user to access the group of organizations for its services. It can provide a sharing mechanism, but its security is higher than a public cloud and lower than a private cloud.
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