The EPOC project: Energy Proportional and Opportunistic Computing system

15397International audienceWith the emergence of the Future Internet and the dawning of new IT models such as cloud computing, the usage of data centers (DC), and consequently their power consumption, increase dramatically. Besides the ecological impact, the energy consumption is a predominant criteria for DC providers since it determines the daily cost of their infrastructure. As a consequence, power management becomes one of the main challenges for DC infrastructures and more generally for large-scale distributed systems. In this paper, we present the EPOC project which focuses on optimizing the energy consumption of mono-site DCs connected to the regular electrical grid and to renewable energy sources

Two-Stage Passive Optical Pod Interconnects for Small Energy-Aware Data Centers

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Dimensioning of 112G Optical-Packet-Switching-Based Interconnects for Energy-Efficient Data Centers

International audienceWe present the dimensioning of an optical packet switching network for energy-efficient intra-data-center connections. Our approach relies on one or two interconnection stages derived from the time-wavelength-interleaved network concept and relying on fast wavelength-tunable lasers. We compare several options by numerical simulation to increase the bit rate of the intra-data-center links up to 112 Gbit/s. The analysis focuses on pulse-amplitude modulation (4 and 8 PAM), where a pre-distortion mechanism is introduced and three types of optical receivers are taken into account. Possible dispersion of device characteristics is taken into account. The single-stage system should enable us to connect 48 servers using 8 PAM and semiconductor-optical amplifier (SOA)-PIN in conjunction with a 62.5 GHz grid. In the two-stage configuration, this number increases up to 1488

Extended Passive Optical Pod Interconnect for Small Mono-site Data Centers

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Towards energy-proportional Clouds partially powered by renewable energy

International audienceWith the emergence of the Future Internet and the dawning of new IT models such as cloud computing, the usage of data centers (DC), and consequently their power consumption, increase dramatically. Besides the ecological impact, the energy consumption is a predominant criterion for DC providers since it determines the daily cost of their infrastructure. As a consequence, power management becomes one of the main challenges for DC infrastructures and more generally for large-scale distributed systems. In this paper, we present the EpoCloud prototype, from hardware to middleware layers. This prototype aims at optimizing the energy consumption of mono-site Cloud DCs connected to the regular electrical grid and to renewable-energy sources