A public cloud is a type of cloud architecture where a service provider makes resources available to the user via the internet. Resources may change by provider but may include storage capabilities, applications or virtual machines. Public cloud is allowed for scalability and resource sharing that would not be possible for a single company to achieve.
Public cloud architecture provides some resources for free. While companies need to pay for other resources by subscription or a pay-per-usage model. Cloud services are even available to singal users. And prices range depend on the user’s resource needs. Company with huge amounts of resources and data need to make a cloud migration strategy before choosing a cloud provider. In this blog, you get all information about public cloud.
What makes a cloud public?
Resourec Allocation: Tenants outside the service provider’s firewall share cloud services and virtual resources and data that come from the provider’s set of architecture, platforms, and software.
Management: At a low level, the service provider maintains the hardware underneath the cloud, supports the organization, and deal with the virtualization programming.
Use Agreements: Resources are circulated on an as-needed basis, but pay-as-you-go option are not necessary . However, Some compnies like the some research institutions using the Massachusetts Open Cloud use public clouds at free of cost.
Structure of Public Cloud
The infrastructure of the public cloud is a type of multi-tenant. This allows user to share the resources while the data remains isolated from other users. At the same time, This cloud architecture can be used to assemble a large range of data resources with low cost. Indeed, This allows users to have remote access to the cloud from anywhere . Because of this, sometimes device has to perform a less computation or no computation at all. The architecture of public clouds depends on the infrastructure being provided. In the market, Three most widely used models are:
Software as a service(SaaS) is a cloud model in which a service provider circulates software hosted in the cloud. Users access the resources via the internet. However, This eliminates the need for individual users to install software on their private machines. So, This reduces the hardware needs of the companies and make support and maintenance costs low.
Platform as a service(PaaS) is a computing model that allows companies to develop software without need of maintaining the underlying infrastructure. Basically, a supplier assembles and upholds an improved climate which it present to user through a broadband association. PaaS often contains version control and compile services as well as computing and storage resources.
In the Infrastructure as a Service (IaaS) cloud architecture, the hole set of data is outsourced by the companies to the cloud service provider. However, Everything is put on the server side ranging from the application hardware to the network hardware and even service virtualization is maintained. So, It makes the cloud adopting process easy. This makes cloud adoption simpler. As everything is hosted on the server-side, this infrastructure is cost-efficient than others by reducing the hardware and maintenance costs.
How does the public cloud work?
Public cloud is a different way of deploying application from traditional on-premises IT infrastructure. So, In the basic public cloud computing architecture, a third-party provider hosts scalable, on-demand IT resources. And delivers them to users over a network connection, that can be accessed via the public internet or a dedicated network. Following are the key features of public cloud:
➠ On-demand computing and Self-service provisioning
➟ Resource pooling
➠ Scalability and Rapid elasticity
➟ Option of pay-per use pricing
➠ Measured service
➟ Resiliency and Availability
➠ High security
➟ Access wide range of network
The public cloud service provider gives the infrastructure needed to host and deploy workloads in the cloud. It also provides tools and services to help customers manage cloud applications, such as data storage, security and monitoring. When choosing a cloud provider, companies can choose large, general use provider such as AWS, Microsoft Azure or Google Cloud Platform (GCP) or a smaller provider. General cloud providers provides broad availability and integration options and are applicable for multipurpose cloud needs.
Public cloud security
Modern public cloud providers alway give security very high priority and it shuld be. Cloud Providers employ specialized security staff to automate security features and monitor the system for anomalies. Because of strict policies other cloud platforms can not access user data. To get access to additional levels of security, companies can leverage a public cloud solution within a hybridized environment.
Public cloud Provider
Public cloud providers are Amazon, Google, Microsoft, IBM, Oracle, and others. Hundreds or thousands of people can access this resources. Google Cloud Platform’s public cloud architecture is a part of google cloud storage public services. For example, Gmail, Google Drive. like, A password protected email account. And this email is stored in shared hardware which is accessed by number of people. So, Below is the top public cloud service providers:
➠ Microsoft Azure ExpressRoute
➟ Google Cloud Interconnect
➟ Oracle Cloud FastConnect
➠ Alibaba Cloud
➟ Blue cloud by IBM
Every cloud provider offers wide range of services and suites on a various service categories like storage, compute and serverless. So, These services are almost similar and the usage depends on the need of the user. Here are the detailed list of categories:
Container: Microsoft offers container services like Azure Kubernetes Service, Azure Container Instances, Azure Container Registry. GCP services provides Google Cloud Run and Google Kubernetes Engine. However, AWS provides container services like Amazon Elastic Kubernetes Service, Amazon Elastic Container Service, AWS Fargate and Amazon Elastic Container Registry.
Storage: Various storage types are block, object, and file. Indeed, Microsoft storage offers Azure Disk for block storage, Azure Files for file storage, and Azure Blob for object storage. Amazon S3 object storage provides six storage tiers and each has different access frequency. However, AWS provides storage services like Amazon Elastic File System and Amazon Elastic Block Store.
Serverless: Azure Functions, AWS Lambda, and Google Cloud Functions provides serverless cloud service.
Compute: GCP IaaS service(Google Compute Engine) provides compute service. Amazon also provides is Amazon Elastic Compute Cloud (EC2) which offers computing capacity for EC2 instances. Microsoft provides compute service as Azure Virtual Machines.