The Green500 List: Year two

The Green500 turned two years old this past November at the ACM/IEEE SC|09 Conference. As part of the grassroots movement of the Green500, this paper takes a look back and reflects on how the Green500 has evolved in its second year as well as since its inception. Specifically, it analyzes trends in the Green500 and reports on the implications of these trends. In addition, based on significant feedback from the high-end computing (HEC) community, the Green500 announced three exploratory sub-lists: the Little Green500, the Open Green500, and the HPCC Green500, which are each discussed in this paper.