caa a22 4500 445851597 CHVBK 20180317145415.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s11227-011-0588-2 doi (NATIONALLICENCE)springer-10.1007/s11227-011-0588-2 Power saving-aware prefetching for SSD-based systems [Elektronische Daten] [Laura Prada, Javier Garcia, J. Garcia, Jesus Carretero] Energy saving for computing systems has recently become an important and worrying need. Energy demand has been increasing in many systems, especially in data centers and supercomputers. This article considers the problem of saving energy on storage systems taking advantage of SSD drives. SSD and magnetic disk devices offer different power characteristics, being SSD drives much less power consuming than conventional magnetic disk drives. This paper presents the design and evaluation of a novel power consumption-aware prefetching mechanism for hybrid storage systems. The prefetching mechanism aims to reduce the power consumption of high performance storage subsystems. Every disk access request is absorbed by an associated SSD device, and only when the SSD device is full, requests are forwarded to the disk in background. We have evaluated the proposed approach with the help of both synthetic and realistic workloads. The experimental results demonstrate that our solution achieves significant reduction in energy consumption. Additionally, the performance evaluation shows that our solution may bring a substantial I/O performance benefit. Springer Science+Business Media, LLC, 2011 Energy-efficient computing nationallicence High-performance computing nationallicence Prefetching nationallicence Solid-state disk nationallicence Prada Laura Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut Garcia Javier Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut Garcia J. Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut Carretero Jesus Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut The Journal of Supercomputing Springer US; http://www.springer-ny.com 58/3(2011-12-01), 323-331 0920-8542 58:3<323 2011 58 11227 https://doi.org/10.1007/s11227-011-0588-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11227-011-0588-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prada Laura Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut NATIONALLICENCE 700 1- Garcia Javier Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut NATIONALLICENCE 700 1- Garcia J. Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut NATIONALLICENCE 700 1- Carretero Jesus Computer Architecture, Communications and Systems Group (ARCOS), University Carlos III, Avda. Universidad 30, 28911, Madrid, Spain aut NATIONALLICENCE 773 0- The Journal of Supercomputing Springer US; http://www.springer-ny.com 58/3(2011-12-01), 323-331 0920-8542 58:3<323 2011 58 11227 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer