Presentation at PACT 2015

Recently, our colleague Patricia Arroba presented our latest research on energy efficiency in Cloud computing in the international conference PACT’15 that was held in San Francisco (CA).

Nowadays, data centers consume about 2% of the worldwide energy production, originating
more than 43 million tons of CO2 per year. Cloud providers need to implement an energy-efficient management of physical resources in order to meet the growing demand for their services and ensure minimal costs. From the application-framework viewpoint, Cloud  workloads present additional restrictions as 24/7 availability, and SLA constraints among others.  Also, workload variation impacts on the performance of two of the main strategies for energy-efficiency in Cloud data centers: Dynamic Voltage and Frequency Scaling (DVFS) and Consolidation.

Our work “DVFS-Aware Consolidation for Energy-Efficient Clouds” presents an energy optimization strategy that combines architecture level policies such as the Dynamic Voltage and Frequency Scaling (DVFS) of the CPU with the dynamic consolidation of virtual machines used to process applications on demand. We provide: 1) a DVFS policy that takes into account the trade-offs between energy consumption and performance degradation and 2) a novel consolidation algorithm that is aware of the frequency that would be necessary when allocating a Cloud workload in order to maintain QoS. Our results demonstrate that including DVFS awareness in workload management provides substantial energy savings of up to 39.14% for scenarios under dynamic workload conditions.

The international conference on Parallel Architectures and Compilation Techniques (PACT) is rated Core A in the ranking of conferences. This forum aims to bring together the latest research in the fields of architecture, compilers, programming languages ​​and applications, bringing together international researchers to discuss the future of new technologies from a theoretical and practical perspective.

The 24th edition was held in San Francisco (USA) on 18-21 October 2015 and has been a good opportunity to present, interact and learn about the latest research in this field.