13:30-14:30 : ExtremeGreen Keynote : Anne-Cécile Orgerie (CNRS, France) : "Energy efficiency in Cloud computing infrastructures"For the last few years, Cloud computing has emerged as an attractive technology leading towards new Internet usages. Its rapid expansion led to a fast growth of the number of datacenters used to power these non-virtual Clouds. Along with this growth comes a consequent increase in the electricity used by these systems. As this rising energy consumption is concerning and hampering Cloud expansion, energy-efficient techniques have been developed. In this talk, we will present the different techniques used to make Clouds greener at each level: from the hardware and infrastructure layers to the platform and software layers. Finally, we will propose some validations of these techniques and some ideas to further improve energy-efficiency.
14:30-15:30 : ExtremeGreen papers
Jukka K. Nurminen, Johan Strandman, Kalle Koskela and Tapio Niemi. "Computing Heaters - An Energy-efficient Way to Provide Computing Services"
Jason Mair, Zhiyi Huang, David Eyers and Yawen Chen. "Quantifying the energy efficiency challenges of achieving exascale computing"
15:30-16:00 : Break
16:00-17:00 : ExtremeGreen Invited Keynote : Ivan Rodero (Rutgers University, USA) : "Exploring Cyber-infrastructure Performance-Energy Behaviors for Big Data Analytics"The proliferation of digital data provides new opportunities in all areas of science, engineering and industry. However, the increasing data volumes and rates, and the associated costs in terms of latencies and energy, quickly dominate and limit data analytics applications ability to leverage this data in an effective and timely manner. Current efforts address this problem with innovative solutions such as in-memory analytics or the development of new architectures. Nevertheless, current solutions for big data analytics have important limitations that make these solutions infeasible for the next generation of cyber-infrastructure. This work focuses on understanding the performance-energy behaviors and limitations associated with data placement, data movement and data processing of big data analytics. Different use case scenarios are studied, from the system memory hierarchy to distributed environments. These studies suggest techniques and directions that can fundamentally enable big data analytics on ongoing cyber-infrastructure.
Call for Papers
Workshop description :
Improving the energy efficiency of large-scale distributed systems (e.g. data centres and Clouds) is a key challenge for both academic and industrial organizations. Although the topic has gained lots of attention over the past years, some of the proposed solutions often seem conservative and not easily applicable to large-scale systems. Their impact at large-scale remains to be proved. Hence, this workshop aims to provide a venue for discussion of ideas that can demonstrate "more than small % solution" to energy efficiency and their applicability to "real world".
After the success of ExtremeGreen2013
and ExtremeGreen2014 workshops, the ExtremeGreen2015 workshop will focus on scientific and industrial approaches and solutions that could have a large impact in terms of energy savings and energy efficiency. Clean-slate approaches and innovative solutions breaking conventional approaches are welcome. The workshop also welcomes submissions of work-in-progress papers on ideas that can have a large impact on improving the energy efficiency of large-scale distributed systems. The papers must provide preliminary results that demonstrate the originality and possible impact of the proposed solutions.
Submissions will be reviewed by an international group of experts in distributed systems and energy efficiency.
Topics of interests :
Green clouds
Energy efficiency of data centers
Green Grids
Green networks for large scale distributed systems
Energy efficiency of storage solutions
Energy-aware design and programming
Energy-efficient hardware and software architectures
Sustainable solutions in large scale distributed systems
Energy-efficient resource management tools
Energy-efficient scalable approaches
Experimental results of Green solutions
Important dates :
Papers due on : February 20, 2015 (extended, final firm deadline)
Author Notification : March 1, 2015
Final Papers Due : March 15, 2015
ExtremeGreen Workshop : 1 day between May 4 and 7, 2015
NESUS
IC1305 COST Action and 
XLCLOUD project
