Leveraging utilization as performance metric for CDN enabled energy efficient internet of things. (December 2019)

• Record Type: Journal Article
• Authors: Ul Islam, Saif; Khattak, Hasan Ali; Pierson, Jean-Marc; Din, Ikram Ud; Almogren, Ahmad; Guizani, Mohsen; Zuair, Mansour
• Is Part Of: Measurement. Volume 147(2019)
• Publication Date: 2019-12
• Subjects: Content Distribution Networks -- CDN utility -- CDN utilization -- CDN Security -- Confidentiality -- Authentication; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2019.07.042
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Majority of the approaches developed to improve the performance of CDN utilize the CDN utility as a key metric to evaluate their effectiveness. CDN utility does not take into account the utilization of CDN resources. CDN utilization has a direct impact on the energy consumption of CDN resources and can be utilized as a tool to implement energy-aware policies in CDN environment. Hence, CDN utilization should be considered as an important metric to evaluate the performance of CDN policy. Abstract: The exponential increase in the Internet of Things (IoT) has drastically augmented the need for computing and storage resources. IoT devices generate massive data that requires to be efficiently stored and disseminated for further processing and decision making. Given this, Content Distribution Networks (CDN) play a vital role to store and serve contents through geographically distributed surrogate servers in an IoT environment. Thanks to the explosive rise in IoT devices, CDN installations are also significantly increasing, hence, consuming a substantial amount of energy. The dynamic energy consumption of CDN resources is proportional to their utilization. Therefore, it is very crucial to design and develop utilization aware policies and strategies for sustainable content distribution. In the literature, different approaches have been proposed to improve the CDN performance by improving CDN utility in terms of security, authentication, and confidentiality, etc. Whereas, these works largely neglect the efficient utilization of CDN resources. In this perspective, this paper investigates the fact that CDN utility does not reflect the utilization of CDN resources. For this purpose, a comprehensive analysis is performed by comparing both metrics - CDN utility and CDN utilization, under various CDN scenarios. The results show that CDN utilization exhibits lower values even if the CDN utility is showing promising results. Hence, we recommend to consider utilization as a major metric to evaluate the performance of a CDN policy.