FAWN (fast array of wimpy nodes) is a low-power server architecture for intensive input/output (IO) tasks.
Learn more:
MIT Technology Review provides more information in Netbook Chips Create a Low-Power Cloud.
This paper, written by FAWN creators David G. Andersen, Jason Franklin, Amar Phanishayee, Lawrence Tan and Vijay Vasudevan, describes how FAWN works.
16 Apr 2009