⊿ Point. {R} Glossary. ◢ Keyword: C. ▰ Sources. 〓 Books [B] ◥ University. {q} PhD. ⏫ THEMES. ⏫ Big Data. [B] Big Data. ⚫ USA. ↂ EndNote. ☝️ BD Dummies. Cloud Computing. Cloud computing metaphor: For a user, the network elements representing the provider-rendered services are invisible, as if obscured by a cloud. Cloud computing is a computing term or metaphor that evolved in the late 1990s, based on utility and consumption of computer resources. Cloud computing involves application systems which are executed within the cloud and operated through internet enabled devices. Purely cloud computing does not rely on the use of cloud storage as it will be removed upon users download action.
Clouds can be classified as public, private and hybrid.[1][2] Overview[edit] Cloud computing[3] relies on sharing of resources to achieve coherence and economies of scale, similar to a utility (like the electricity grid) over a network.[2] At the foundation of cloud computing is the broader concept of converged infrastructure and shared services. Cloud computing, or in simpler shorthand just "the cloud", also focuses on maximizing the effectiveness of the shared resources. Hybrid Cloud. Hybrid cloud is a cloud computing environment that uses a mix of on-premises, private cloud and third-party, public cloud services with orchestration between the two platforms. By allowing workloads to move between private and public clouds as computing needs and costs change, hybrid cloud gives businesses greater flexibility and more data deployment options. Hybrid cloud architecture Establishing a hybrid cloud requires the availability of: A public infrastructure as a service (IaaS) platform, such as Amazon Web Services, Microsoft Azure or Google Cloud Platform; The construction of a private cloud, either on premises or through a hosted private cloud provider; And adequate wide area network (WAN) connectivity between those two environments.
Typically, an enterprise will choose a public cloud to access compute instances, storage resources or other services, such as big data analytics clusters or serverless compute capabilities. Hybrid cloud benefits and use cases Hybrid cloud challenges. Private Cloud. The private cloud is defined as computing services offered either over the Internet or a private internal network and to selected users only instead of the general public. Also called an internal or corporate cloud, private cloud computing gives businesses many of the benefits of a public cloud, including self-service, scalability and elasticity, with the additional control and customisation available from dedicated resources over a computing infrastructure hosted on premises.
In addition, private clouds deliver a higher level of security and privacy through both company firewalls and internal hosting to ensure that operations and sensitive data are not accessible to third-party providers. One drawback is that the company’s IT department is held responsible for the cost and accountability of managing the private cloud. So private clouds require the same staffing, management and maintenance expenses as traditional data centre ownership.
Public Cloud. The public cloud is defined as computing services offered by third-party providers over the public Internet, making them available to anyone who wants to use or purchase them. They may be free of charge or sold on demand, allowing customers to only pay per usage for the CPU cycles, storage or bandwidth they consume. Unlike private clouds, public clouds can save companies from the expensive costs of having to purchase, manage and maintain on-premises hardware and application infrastructure – the cloud service provider is held responsible for all management and maintenance of the system. Public clouds can also be deployed faster than on-premises infrastructures and with an almost infinitely scalable platform. Every employee of a company can use the same application from any office or branch using their device of choice, as long as they can access the Internet.