In this tutorial you will learn about the Public Cloud Model and its application with practical example.
Public Cloud Model
The public cloud model is a shared platform that is available to the entire public via an Internet connection. The public cloud model is a pay-as-you-go approach that is managed by a third party, i.e., a cloud service provider. Multiple users are using the same storage space in the public cloud at the same time. Businesses, colleges, government agencies, or a mix of these entities own, administer, and operate the public cloud. The public cloud includes Amazon Elastic Compute Cloud (EC2), Microsoft Azure, IBM’s Blue Cloud, Sun Cloud, and Google Cloud.
A public cloud is a platform that leverages the conventional cloud computing concept to make resources available to users remotely, such as virtual machines, applications, or storage. Public cloud services may be provided for free or via a variety of subscription or on-demand pricing models, including a pay-per-usage approach.
How does the public cloud function?
The public cloud is a different approach to application development than traditional on-premises IT systems. A third-party provider hosts scalable, on-demand IT resources and offers them to consumers over a network connection, either the public internet or a dedicated network, under the basic public cloud computing paradigm.
The infrastructure required to host and install workloads in the cloud is provided by the public cloud provider. It also provides tools and services to clients to assist them manage cloud applications, such as data storage, security, and monitoring.
Architecture of the Public Cloud Model
A public cloud is a completely virtualized system that transmits data over high-bandwidth network access. Providers utilize a multi-tenant architecture, which allows users – or tenants – to execute workloads on shared infrastructure and share computing resources. In the public cloud, a tenant’s data is conceptually segregated and kept distinct from the data of other tenants.
Cloud service providers operate in logically independent locations inside public cloud regions. These availability zones are often made up of two or more connected, highly available physical data centers. The following links detail the hundreds of AWS, Azure, and GCP regions and availability zones throughout the world.
The service model governs how much power the user has over specific components of the cloud. Cloud clients, for example, construct virtual computers, install operating systems, and control cloud networking configurations in IaaS installations. However, the cloud networking infrastructure is totally handled by the provider under PaaS and SaaS models.
Benefits of Using the Public Cloud Model
The following are some of the benefits of using the public cloud:
1) Low Price
Because it shares the same resources with a large number of customers, public cloud is less expensive than private or hybrid cloud.
2) No regard for location
Because its services are delivered over the internet, the public cloud is not limited to a single location.
3) Conserve Time
In the public cloud, the cloud service provider is responsible for managing and maintaining the data centers where data is stored, allowing cloud users to save time establishing connectivity, deploying new products, releasing product updates, configuring, and assembling servers.
4) Quick and simple setup
Organizations may simply purchase public cloud services via the internet and deploy and configure them remotely via the cloud service provider.
5) Business Flexibility
The capacity to elastically resize computer resources based on the needs of the company is provided by the public cloud.
6) Reliability and scalability
The public cloud provides consumers with scalable (simple to add and remove) and dependable (24*7 availability) services at a low cost.
Disadvantages of Public Cloud
1) Insufficient Security
Because resources are shared openly, the public cloud is less secure.
The performance of the public cloud is determined by the speed of internet access.
3) Less adaptable
The public cloud is less adaptable than the private cloud.