Using virtual servers provides a more efficient and effective use of processing and storage resources that might otherwise be underutilized. Since one physical server may host several virtual server, consolidates the need for many physical devices, as shown in Figure 6-6. A virtual servers is one of several servers that may be configured on a host machine. Through a process known as virtualization, one host machine may be configured to operate as if it were several smaller, special-purpose servers. The IaaS provider operates data centers that contain high-end servers, each with multiple processors and terabytes of storage. Instead, businesses rent space and computing power from an IaaS provider. The fact that they are available in the Cloud is what matters.īusinesses are interested in Infrastructure as a Service because it allows them the ability to scale their applications without having to procure additional hardware resources. From the user's perspective, as shown in Figure 6-2, the location of the application and the data that it accesses are not important. Rather than storing data or installing applications on a user's own computer or on a company's own server, data is stored and applications are run on servers operated by companies such as Google, Amazon, Microsoft, and Salesforce. Customers pay as they go for the computing storage and resources that they actually use in a given period of time. Computing resources may be allocated dynamically as applications require additional bandwidth or processing power. Cloud computing service providers offer server space and processing on an as-needed, on-demand basis. Users of a Cloud computing service interact with and manage data and applications stored on servers located in a remote data center accessible via the Internet. The Cloud represents the Internet, as its frequent use in many computer network diagrams often suggests. Describes how applications are stored and deployed on a network of Internet servers.
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