Abstract
Cloud computing has emerged as a cutting-edge technology which is widely used by both private and public institutions, since it eliminates the capital expense of buying, maintaining, and setting up both hardware and software. Clients pay for the services they use, under the so-called Service Level Agreements (SLAs), which are the contracts that establish the terms and costs of the services. In this paper, we propose the CloudCost UML profile, which allows the modeling of cloud architectures and the users’ behavior when they interact with the cloud to request resources. We then investigate how to increase the profits of cloud infrastructures by using price schemes. For this purpose, we distinguish between two types of users in the SLAs: regular and high-priority users. Regular users do not require a continuous service, so they can wait to be attended to. In contrast, high-priority users require a constant and immediate service, so they pay a greater price for their services. In addition, a computer-aided design tool, called MSCC (Modeling SLAs Cost Cloud), has been implemented to support the CloudCost profile, which enables the creation of specific cloud scenarios, as well as their edition and validation. Finally, we present a complete case study to illustrate the applicability of the CloudCost profile, thus making it possible to draw conclusions about how to increase the profits of the cloud infrastructures studied by adjusting the different cloud parameters and the resource configuration.
Highlights
The importance of the cloud has increased enormously over the last few years, and currently it dominates the Information Technology (IT) markets
Contribution This paper extends the CloudCost Unified Modeling Language (UML) profile and the MSCC modeling tool – presented in (Bernal et al, 2019b) – by including the new features related to the analysis of profits, namely, the user types, costs per resource, discounts, offers, and compensations
We have proposed the CloudCost UML profile as a means for modeling a cloud infrastructure and the user interactions with the cloud service provider, with two different Service Level Agreements (SLAs) for the users
Summary
The importance of the cloud has increased enormously over the last few years, and currently it dominates the Information Technology (IT) markets. It is essential for cloud providers to be more competitive and to have the ability to manage their resources more effectively. With this goal in mind, the modeling and analysis of cloud systems can be a powerful tool for cloud providers to manage their. We have defined a UML 2.5 parameterized profile, named CloudCost, to model the architecture and interactions of a cloud system based on Service Level Agreements (SLAs) (Khan, 2016). UML is a standard of the Object Management Group (OMG) (OMG, 2016), and is designed to be a general-purpose, developmental, modeling language that provides a standard method to visualize the final design of a system
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