Public Cloud: Definition, Features, Advantages, and Disadvantages

The Public cloud is a cloud deployment model that is delivered over the public internet to multiple users or customers by the third-party providers. This can be offered as a paid service or free of charge to anyone who wishes to purchase or use them.

Public cloud service providers may offer cloud-based services like Iaas (Infrastructure as a service), Paas (Platform as a service), and Saas (Software as a service) to users on monthly or pay-per-use charges providing no need to hosting these services on-site in their own data center.

Public Cloud can save customers or clients from the expensive costs of purchasing, managing, and maintaining on-premises hardware and infrastructure installation for which cloud service providers are held responsible for all maintenance and management of the system. Its deployment is faster than on-premises infrastructure and can be accessed remotely.

The worldwide market size of public cloud is increasing day by day and is expected to see a growth of 6.3% in 2020 to total $257.9 billion up from $242.7 billion in 2019, according to a research organisation Gartner, Inc.

List of major public Cloud providers

  • Amazon Web Services
  • Microsoft Azure
  • Google Cloud Platform
  • Alibaba Cloud
  • IBM
  • Oracle
  • SAP
  • Salesforce

Features

Scalability – Public Clouds are highly scalable in computing resources so that applications can respond seamlessly to fluctuations in inactivity.

Pay-per-use model – Public clouds work on a utility model that means customers can access the resources they need and only pay for what they use avoiding additional charges and wasted capacity.

Location Independence – Public Cloud services are available through the internet which ensures that the services are available remotely to the customers without disturbances.

Performance – Performance may fluctuate based on the server load because the same hardware is shared between many users experiencing traffic on the server.

Advantages

Cost-effective set-up – Public Cloud providers like Google, Amazon, and Microsoft have multiple data centers with updated and modernized hardware and software. This provides the freedom to customers for setting up their own administered resources reducing the high operational cost.

No maintenance – Public Cloud service providers provide all maintenance for hardware, software, and networks in the cloud. Thus, it allows customers not to worry about updating infrastructure, security, and other upgrades.

High reliability – Public Clouds are the combination of a vast network of servers that ensures against failure and smoothens the service.

Scalability – Public Cloud offers scalability enabling the customers to scale resources like bandwidth, RAM, and storage based on the business requirements and providing availabilities of resources on-demand to meet user’s business needs.

Flexibility – Cloud services like Iaas, Paas, Saas are ready to be used as a service by any internet-enabled device.  With the cloud data back up has become easier than before as all data are reflected in the data centers located at different locations.

Disadvantages

Performance – The performance of the network depends on internet connectivity. In Public Cloud, the same hardware is shared between multi-users that may affect performance because of the server load.

Security – Security and data privacy are always crucial. In Public Clouds, users don’t have control over infrastructure, and the service level policies and compliances are completely administered by providers.

Customisation – Customisation of resources and services is not possible.

The Last Corner

Adoption and reliance on the public cloud by businesses are increasing day by day and entrepreneurs are keener to shift data to the cloud to optimize workloads. As the cloud is a new age and trendy technology, and technology keeps on changing over time, the future of public cloud services or Cloud Computing may have services in Faas (Function as a service) also known as serverless computing, cognitive computing, and other new services along with or overcoming Iaas, Paas, Saas.

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