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Liudvikas Kaklauskas; Vaida Zdanytė (2015)
Publisher: Klaipeda University
Journal: Computational Science and Techniques
Languages: English
Types: Article
Subjects: Electronic computers. Computer science, QA75.5-76.95

Cloud computing can be defined as a new style of computing in which dynamically scala-ble and often virtualized resources are provided as a services over the Internet. Advantages of the cloud computing technology include cost savings, high availability, and easy scalability. Voas and Zhang adapted six phases of computing paradigms, from dummy termi-nals/mainframes, to PCs, networking computing, to grid and cloud computing. There are four types of cloud computing: public cloud, private cloud, hybrid cloud and community. The most common and well-known deployment model is Public Cloud. A Private Cloud is suited for sensitive data, where the customer is dependent on a certain degree of security.

According to the different types of services offered, cloud computing can be considered to consist of three layers (services models): IaaS (infrastructure as a service), PaaS (platform as a service), SaaS (software as a service). Main cloud computing solutions: web applications, data hosting, virtualization, database clusters and terminal services. The advantage of cloud com-puting is the ability to virtualize and share resources among different applications with the objective for better server utilization and without a clustering solution, a service may fail at the moment the server crashes.

DOI: 10.15181/csat.v2i2.914

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