Desktop-Grids have been around since the very early days of Grid computing, scaling into the millions of PCs, well established as regular distributed computing infrastructure for many research projects. Desktop-Grids collect CPU cycles from PCs contributed by donors, by volunteers who are willing to support science and research. This paper focusses on the energy efficiency aspects of Desktop Grid computing: the Green Desktop Grid, as a task of the EU-FP7 DEGISCO project [20].
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