According to the NIST cloud computing has the following five characteristics: Cloud computing is categorized according to different service models: This is often represented in a pyramid stack model: IaaS are basic services providing virtual infrastructure, such as storage and computing capacities. Instead of buying expensive hardware, companies can rent the server capacities they need for their purposes.
In total, this saves resources because the capacity rented and used may be easily adapted to the actual need. Although the servers are located in data centers of the provider which the users cannot access, they are still responsible for administration and configuration. PaaS is the next logical step after IaaS. Companies can rent predefined platforms for software development in the cloud. This is often used for the development of applications.
(PDF) A Comparison between Cluster, Grid, and Cloud Computing
The provider of PaaS deals with administration and maintenance of the underlying infrastructure, so that the users can start programming right away. SaaS is what most people associate with the cloud. SaaS describes cloud-based application software, which the end-user can access from various devices.
Basically the software is rented all-inclusive: Therefore, you do not need to be particularly tech-savvy to use these cloud services. Everything is set up ready-to-use for you. You will interact with a user interface, which you usually cannot modify. SAP as well offers cloud-based systems for business processes. Further examples are the Google Apps and Microsoft Officeencouraging collaboration and productivity in teams.
Especially interesting for private users are probably cloud storage services, like Dropbox, Google Drive and OneDrive.
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If computers of the kind I have advocated become the computers of the future, then computing may someday be organized as a public utility, just as the telephone system is a public utility. The computer utility could become the basis of a new and important industry. John McCarthy, What the visionary computer specialist predicted as early as has long come true.
Week of Innovations PaaS for Technologically Advanced Solutions. Use Case of GMV with Jelastic Private Cloud In both, small businesses and large commercial companies, proceed moving their projects and services to the Cloud in order to gain higher performance and receive in-house management within private Top 5 Tips Not to Lose Your Memory In this article, we would like to share specifics of Java memory management and elasticity inside containers that are not evident at the first sight.
Jelastic Team Adventures in Germany: Participation at WHD.
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