Abstract
Energy management in large scale distributed systems has an important role to minimize the contribution of Information and Communication Technology (ICT) industry in global CO2 footprint and to decrease the energy cost. Content Distribution Networks (CDNs) are one of the popular large scale distributed systems, in which the client requests are forwarded towards servers and are fulfilled either by surrogate servers or by the origin server, depending upon the contents availability and the CDN redirection policy. In this paper we explore the energy consumption in CDNs using different client redirection policies. We propose a new model to measure energy consumption in the CDN surrogates. The surrogate servers’ utilization is used as a key criteria to measure the consumed energy. We show the impact of minimizing the number of surrogate servers on the energy consumption and on the other performance evaluation parameters in CDNs (e.g. servers utilization, mean response time, byte hit ratio). We also exhibit, how the energy consumption and the other performance evaluation parameters are affected by the change in the number of content requests, i.e. by the traffic load.
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ul Islam, S., Pierson, JM. (2012). Evaluating Energy Consumption in CDN Servers. In: Auweter, A., Kranzlmüller, D., Tahamtan, A., Tjoa, A.M. (eds) ICT as Key Technology against Global Warming. ICT-GLOW 2012. Lecture Notes in Computer Science, vol 7453. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32606-6_6
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DOI: https://doi.org/10.1007/978-3-642-32606-6_6
Publisher Name: Springer, Berlin, Heidelberg
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