Ying Lu 0002 Tarek F. Abdelzaher Avneesh Saxena Design, Implementation, and Evaluation of Differentiated Caching Services. 440-452 2004 15 IEEE Trans. Parallel Distrib. Syst. 5 http://doi.ieeecomputersociety.org/10.1109/TPDS.2004.1278101 db/journals/tpds/tpds15.html#LuAS04