Cloud Computing Definition
In simple terms, cloud computing is renting instead of buying your IT. Rather than investing heavily in databases, software, and equipment, companies are opting to access their compute power via the internet and pay for it as they use it.
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Cloud Computing Basics
When a company chooses to “move to the cloud,” it means that its IT infrastructure is stored offsite, at a data center that is maintained by the cloud computing provider (such as Oracle). The cloud provider has the responsibility for managing the customer’s IT infrastructure, integrating applications, and developing new capabilities and functionality to keep pace with market demands.
For customers, cloud computing offers more agility, scale, and flexibility. Instead spending money and resources on legacy IT systems, customers are able to focus on more strategic tasks. Without making a large upfront investment, companies can quickly access the computing resources they need—and only pay for what they need.
Types of Cloud Computing
There are three different types of clouds: public, private, and hybrid. All of them vary in terms of the amount of management that is required from the customer as well as the level of security provided.
In a public cloud, the whole computing infrastructure is located on the premises of the cloud provider, who delivers these services to the customer over the internet. The customer does not have to maintain their own IT and can quickly add more users or computing power as needed. The cloud provider has multiple tenants sharing its IT infrastructure.
A private cloud is used exclusively by one organization. It could be hosted at the organization’s location or at the cloud provider’s data center. A private cloud provides the highest level of security and control.
As the name suggests, a hybrid cloud is a combination of both public and private clouds. Generally, the customer will host their business-critical applications on their own servers for more security and control, while their secondary applications will be stored at the cloud provider’s location.
The use of multiple cloud computing and storage devices in a single architecture. The customer may have mix of Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS) environments.