Public Cloud

What is Public Cloud?

Public cloud is a form of cloud computing that involves third-party to own, host, operates and manage servers, storage, and apps for the public. Users pay as they go for these resources, reducing upfront infrastructure investment. Scalable, flexible, and cost-effective public cloud services allow enterprises to easily scale IT resources on demand. Public cloud users are relieved of maintenance, security, and updates as it executed public cloud providers.

  • How does public cloud work?
  • Core features of public cloud
  • Public cloud benefits
  • Public cloud service models
  • Public cloud modern applications
  • Public cloud security and compliance
  • HPE and public cloud
How does public cloud work?

How does public cloud work?

Public cloud is a type of computing model that offers consumers and businesses pay-per-use servers, storage, databases, networking, software, and more.

Public clouds are scalable, versatile, and cost-effective because users share them. Conversely, private clouds are business-specific and exclusively dedicated to a single business.

Here's how public cloud works:

  • Infrastructure as a service (IaaS): Public cloud providers offer VMs, storage, and networking. These resources can be provided and managed via API or online. Businesses can rapidly scale up or down without buying or maintaining hardware.
  • Platform as a service (PaaS): Public cloud platforms provide middleware, development tools, and runtime environments for application development, testing, and deployment. These services let developers construct and launch apps without infrastructure, accelerating app development and reducing time to market.
  • Software as a service (SaaS): Public cloud providers provide several software packages for subscription online. These programs cover CRM, ERP, productivity, and more productivity tools. SaaS software can be accessible online, eliminating installation and maintenance.
  • Elasticity and scalability: Public cloud infrastructures adjust to workloads. User resource allocation can be adjusted for traffic surges, seasonality, and other factors. With this flexibility, apps remain responsive amid peak demand.
  • Pay-per-use: Utility-based billing is common in public cloud computing. Users only pay for computing power, storage, bandwidth, and other services they use. This pay-per-use method optimizes IT spending by aligning usage to costs.
  • Global availability and redundancy: Public cloud providers have data centers worldwide, allowing clients to host applications closer to their target audience for lower latency and greater performance. These firms provide data availability and durability using redundant infrastructure and data replication.
  • Security and compliance: Public cloud providers safeguard customer data and infrastructure. They include security audits, encryption, IAM, compliance certifications, and network security. However, users must secure apps and data using recommended practices.

Public cloud is flexible and economical for companies not wanting to manage on-premises equipment. Outsourcing IT resources to reliable providers allows companies to focus on innovation and growth while using public cloud scalability, reliability, and security.

Core features of public cloud

Core features of public cloud

Public cloud services include the following essential features: 

On-demand scalable computing resources:

Public clouds can scale computer resources up or down in response to demand. This enables customers to swiftly and effortlessly modify their infrastructure to align with their workload needs.

  • Shared infrastructure and multi-tenancy:

The shared infrastructure used by public cloud services allows several users, also known as tenants, to use the same physical resources. This multi-tenancy architecture enables users to better utilize resources and share costs.

  • Network access and connectivity:

Users can access cloud resources and services from anywhere with a reliable connection, fostering user mobility. This network access facilitates remote work, seamless collaboration, and interaction with internet-based services. The title reflects the importance of both network access and connectivity in enabling a flexible and connected user experience.

  • Pay-per-use pricing model:

The standard pricing strategy used by public cloud providers is often referred to as pay-as-you-go or pay-per-usage. Customers pay for just the resources they really use, which promotes cost-effectiveness. Billing is based on the actual amount of resources used. Large upfront capital expenditures are not necessary with this concept, which also offers flexible cost management.

  • Self-service provisioning: 

Users can independently provision and configure cloud resources without contacting the service provider directly. Scalability and flexibility in resource management are encouraged by this self-service capability, which functions on an as-needed, self-driven basis.

  • Security: 

Within the public cloud, a shared responsibility paradigm controls security, involving collaboration between the user and the service provider. The cloud architecture provides strong security features, protocols, and certifications, guaranteeing a thorough approach to data and application protection. This recognition of shared accountability highlights the importance of security in the public cloud environment.

Public cloud benefits

Benefits of public cloud

Benefits of public cloud services: 

  • Cost-efficiency and resource optimization:

Users pay solely for the resources they use in public clouds. This removes capital-intensive hardware and infrastructure investments. The shared nature of public cloud resources also improves cost efficiency and makes better use of computer resources.

  • Flexibility and scalability: 

Users of public cloud services can adjust the capacity of their resources in response to fluctuations in demand. Businesses with fluctuating workloads require scalability and can modify their processing capacity without substantial planning or hardware investment.

  • Global accessibility and redundancy:

Public clouds allow users to access their data and apps from anywhere with an Internet service. Distributed teams and multinational enterprises benefit from global accessibility. Several public cloud providers offer redundancy and backup services to ensure data availability and reduce the risk of data loss.

  • Accelerated innovation and development:

Public cloud services facilitate swift innovation by enabling rapid development and deployment of new applications and services. By eliminating the need for lengthy procurement cycles and infrastructure acquisition, businesses can swiftly adapt to evolving market demands. This agility fosters a competitive edge, allowing organizations to stay ahead in the dynamic landscape of technology and innovation.

Public cloud services offer cost-effectiveness, flexibility, and global accessibility to adapt to changing business requirements.

Public cloud service models

Public cloud service models

  • Infrastructure as a Service (IaaS):

IaaS provides virtualized computing resources over the internet, including networking, storage, and virtual machines. Users control this infrastructure's operating system, apps, and software, giving them more flexibility and customization options.

  • Platform as a Service (PaaS):

PaaS is a platform package that includes development tools and services. Here users can develop, deploy, and manage applications without worrying about the underlying infrastructure. It makes the development process simpler.

  • Software as a Service (SaaS):

SaaS delivers software applications online through a subscription model. Users access the software via a web browser, eliminating the need for local installations and maintenance. Examples include CRM programs, office suites, and email services.

  • Function as a Service (FaaS):

FaaS, or serverless computing, lets programmers run specific functions or code segments in response to events without managing the supporting infrastructure. The cloud provider handles function execution and scalability automatically. FaaS is beneficial for microservices and event-driven architectures.

Users can pick the service model that fits their needs, choosing from different levels of abstraction and management responsibilities provided by these models.

Public cloud modern applications

Public cloud modern applications

Modern applications hosted on public cloud platforms change software development, deployment, and management. These apps employ the cloud's scalability, agility, and cost-effectiveness to provide novel solutions worldwide. Modern public cloud apps' features and benefits are covered here:

  • Microservices architecture: Modern programs are often constructed using a microservices architecture, which divides complicated systems into smaller, autonomous services. Services interact via APIs and specialize in a certain function or feature. This design allows developers to iterate rapidly and react to changing needs because it is flexible, scalable, and durable.
  • Containerization and orchestration: Docker containers are essential to contemporary applications. Containers isolate application code, dependencies, and runtime environment for consistency. Container orchestration technologies like Kubernetes streamline development and operations by automating containerized application deployment, scaling, and administration.
  • DevOps practices: Modern application development emphasizes Dev-Ops teamwork to speed product delivery. Continuous integration (CI) and continuous delivery (CD) automate build, test, and deployment operations for fast, dependable releases. Teams can develop at scale with integrated DevOps tools and services on public cloud platforms.
  • Serverless computing: function as a service (FaaS) abstracts the infrastructure and lets developers write stateless functions. Users pay solely for computing resources used to execute, scale, and supply these functions on public clouds. Serverless designs optimize costs, scale automatically, and speed up application time-to-market.
  • Event-driven architecture: Modern programs use events to interact asynchronously. Meaningful system events generate actions and workflows. This decoupled design allows components to grow independently and withstand fluctuating workloads, improving flexibility, scalability, and resilience.
  • Data analytics and AI/ML integration: Modern apps can leverage public cloud platforms' powerful data analytics and AI/ML capabilities to glean insights, automate processes, and customize experiences. Managed databases, data lakes, analytics tools, and pre-trained AI models let developers innovate from enormous data sets.
  • Hybrid and multicloud  deployments: Modern apps use cloud providers and on-premises infrastructure to their advantage. Hybrid cloud solutions let enterprises protect sensitive data and compliance while using the public cloud's scale and flexibility. Redundancy, resilience, and vendor lock-in avoidance provide business continuity and agility with multicloud deployments.

Current public cloud apps use microservices, containerization, DevOps, serverless computing, event-driven architecture, data analytics, and hybrid/multicloud deployments to provide scalable, robust, and creative solutions. The public cloud helps firms speed digital transformation, business agility, and competitiveness in today's fast-paced market.

Public cloud security and compliance

Public cloud security and compliance

Public cloud services require several security and compliance procedures. These are the essential elements:

  • Privacy and data encryption measures:

Strong encryption techniques are frequently used by public cloud providers to safeguard data while it's in transit and at rest. By doing this, confidential data is protected from unwanted access. Furthermore, users can manage the location of their data storage through privacy features like data residency choices, which also take legal and regulatory needs into account. Furthermore, privacy controls, such as data residency choices, provide consumers discretion over where their data is maintained while meeting legal and regulatory obligations.

  • Compliance standards and regulations:

Public cloud services abide by several compliance guidelines and rules to satisfy regional and industry-specific needs. Some examples include HIPAA (Health Insurance Portability and Accountability Act), GDPR (General Data Protection Regulation), and other regulations. Cloud companies can provide compliance certificates as proof of their adherence to certain standards.

  • Security controls and identity management:

Platforms for public clouds offer a variety of identity management and security capabilities. This entails using firewalls, access restrictions, and network security measures to prevent unwanted access. By allowing companies to manage and restrict user access to resources, identity, and access management (IAM) solutions may help avert security lapses.

  • Monitoring and Incident Response:

It is essential to continuously monitor cloud systems to identify and address security problems. Most public cloud providers include tracking tools for system behavior, user activities, and possible threats. The procedures to be followed in the event of a security issue are outlined in incident response plans, which assist to lessen the effects and stop them from happening again.

The goal of public cloud providers' implementation of these security and compliance procedures is to establish a reliable and safe environment in which customers may store their data and applications. In turn, users have a say in configuring and maintaining these security elements to suit their unique requirements and compliance standards.

HPE and public cloud

HPE and public cloud

Technology is changing quickly, so organizations must keep ahead to be competitive. HPE GreenLake, OpsRamp, a Hewlett Packard Enterprise company  and HPE Ezmeral Data Fabric Software have become essential tools for enterprises to manage contemporary IT architecture with agility and efficiency.

  • HPE GreenLake: HPE GreenLake delivers cloud computing to on-premises infrastructure with flexible consumption-based IT procurement. HPE GreenLake lets companies pay-per-use for HPE hardware, software, and services, aligning IT expenditures with use. This enables enterprises to scale resources up or down while maintaining on-premises infrastructure security and control.
  • OpsRamp: For hybrid and multicloud settings, OpsRamp is a cutting-edge IT operations management platform that offers centralized visibility, monitoring, and automation. OpsRamp consolidates monitoring tools and procedures to help IT teams find and fix issues throughout an infrastructure stack, from on-premises data centers to public cloud services. This unified strategy streamlines processes, boosts efficiency, and increases IT service dependability.
  • HPE Ezmeral Data Fabric Software: This distributed data fabric helps enterprises manage and analyze data across hybrid and multicloud systems.  HPE Ezmeral Data Fabric Software stores, processes, and queries enormous amounts of data on a scalable and robust platform based on Apache Hadoop and Apache Spark. Data replication, tiered storage, and data lifecycle management help enterprises get insights from their data while assuring data consistency and availability across IT settings.

Public cloud vs. private cloud vs. hybrid cloud


Public cloud

Private cloud

Hybrid cloud

Ownership and management

Owned and operated by third-party cloud service provider.

Owned and operated by a single organization, either on-premises or by a third-party provider exclusively for that organization.

Combines elements of both public and private clouds, allowing data and applications to be shared between them.


Accessible over the internet, providing global availability and scalability.

Accessible via a private network, providing enhanced security and control over data.

Provides the flexibility to use both public and private resources based on specific needs and workload characteristics.

Cost structure

Typically follows a pay-as-you-go or subscription-based pricing model, eliminating upfront hardware costs.

Involves higher upfront costs due to infrastructure investment but may lead to lower operational costs over time.

Offers a mix of pay-as-you-go and upfront investment, providing cost and budget flexibility.


Offers on-demand scalability, allowing users to easily scale resources up or down based on requirements.

Offers scalability, but expansion may require additional infrastructure investment.

Enables dynamic scaling by utilizing public cloud resources for variable workloads while maintaining sensitive data on the private cloud.

Resource sharing

Resources are shared among multiple users (multi-tenancy model), promoting cost efficiency.

Resources are dedicated to a single organization, ensuring more control and customization.

Combines the benefits of public cloud efficiency and private cloud customization, allowing for a tailored approach to resource allocation.

Security and compliance

Security measures are implemented by the provider, and compliance is often addressed through certifications.

Organizations have greater control over security measures, allowing for customization based on specific compliance requirements.

Security measures vary based on the chosen combination, allowing organizations to meet specific compliance requirements.

Differences between public cloud services and on-site IT infrastructure

Understanding the differences between public cloud services and on-site IT infrastructure is crucial when contemplating cloud computing.

Public cloud

Typical on-site IT infrastructure

Resources are hosted and managed by third-party providers.

Resources are hosted and managed within the organization's premises.

Scalability is dynamic, allowing for easy resource scaling based on demand. 

Scalability often requires upfront investment in hardware and may be limited by physical constraints.

Pay-as-you-go pricing model where users pay for resources consumed.

Capital expenditure is required for hardware purchases, with ongoing operational costs for maintenance and upgrades.

Offers greater flexibility and accessibility, enabling remote access from anywhere with an internet connection.

Accessibility may be limited to on-site or via VPN, restricting remote access.

Provides redundancy and high availability through distributed data centers.

Relies on local backups and failover systems for redundancy, which may be less robust.

Security measures are managed by the cloud provider, often with advanced security features.

Security measures are managed internally, requiring dedicated resources and expertise.

HPE hybrid cloud

Related topics

Hybrid cloud

Private cloud

Multi cloud