01187nas a2200145   4500000000100000008004100001100001800042700002800060700001800088700001600106245009600122300001100218520079800229022001401027       2016                            d1 aLeila Sharifi1 aLlorenç Cerdà-Alabern1 aFelix Freitag1 aLuís Veiga00aEnergy Efficient Cloud Service Provisioning: Keeping Data Center Granularity in Perspective  a1–273 aThe cost of power and its associated delivery are becoming significant factors in the total expenditure of large-scale data centers. Numerous techniques have been proposed to address the energy efficiency issue in cloud systems. Recently, some efforts have been made to decentralize the cloud via distributing data centers in diverse geographical positions, at different scales. In this paper, we elaborate on the energy effectiveness of service provisioning on different cloud architectures, from a mega-data center to a nano data center, which provides the extreme decentralization in terms of cloud architecture, as well as P2P-clouds or community network clouds. We study the energy consumption through an analytical and simulation framework for video streaming and MapReduce applications.  a1572-9184