What is a public cloud?
These companies operate large data centers and make a subset of their resources, such as virtual machines and storage, available to the public over the internet. Users of the public cloud only pay for the resources they use and can scale their usage up or down as needed.
Public cloud services are often considered to be more cost-effective and scalable than traditional on-premises IT infrastructure.
Types of public cloud
There are several types of public cloud services that are offered by commercial cloud providers:
- Infrastructure as a Service (IaaS): This type of public cloud service provides users with virtualized computing resources, such as virtual machines (VMs), storage, and networking. IaaS is typically used by organizations that want to run their own software and applications on the cloud provider’s infrastructure. Examples include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP).
- Platform as a Service (PaaS): This type of public cloud service provides users with a platform for developing, running, and managing applications. PaaS typically includes a web server, a database, and other tools for developing and deploying applications. Examples of PaaS include AWS Elastic Beanstalk, Azure App Service, and Google App Engine.
- Software as a Service (SaaS): This type of public cloud service provides users with access to software applications that are run and managed by the cloud provider. SaaS applications are typically accessed through a web browser and do not require users to install any software on their own computers. Examples of SaaS include G Suite, Microsoft Office 365, and Salesforce.
- Function as a Service (FaaS): also known as Serverless computing, is a cloud computing model in which the cloud provider runs the server, and dynamically manages the allocation of machine resources, this is an event-driven computing model in which the cloud provider runs the server and dynamically manages the allocation of machine resources. AWS Lambda, Azure Functions, and Google Cloud Functions are some examples of FaaS.
These are some of the main types of public cloud services that are offered by commercial cloud providers. Depending on the provider, there can be additional services or variations on the types of services listed above.
Uses of public cloud
Public cloud services can be used for a variety of purposes, including:
- Cloud storage: Public cloud providers offer a wide range of storage options, such as object storage, block storage, and file storage, that can be used to store and manage data in the cloud.
- Virtual machines and containerization: Public clouds provide virtualized computing resources, such as virtual machines (VMs) and containers, that can be used to run and manage applications and services.
- Backup and disaster recovery: Public clouds can be used to store backup copies of data and applications, and to quickly recover from disasters or other disruptions.
- Big data processing: Public clouds offer powerful computing resources and storage that can be used to process large amounts of data and run complex analytics workloads.
- Development and testing: Developers can use public clouds to create test environments, build and deploy applications, and run automated tests.
- Hosting web applications: Public clouds can be used to host web applications and serve the traffic from the cloud.
- Internet of Things (IoT): Public clouds can be used to store and process data from IoT devices, and run machine learning algorithms on that data to gain insights and make predictions.
- Serverless computing: Public cloud providers offer serverless computing services, like AWS Lambda, Azure functions, and GCP Cloud functions, that allow to write and run code without the need to provision or manage servers.
These are just a few examples of the many ways that public cloud services can be used. Public clouds are extremely flexible and can be used to support a wide range of workloads and use cases.