Ryan Johnson Nikos Hardavellas Ippokratis Pandis Naju Mancheril Stavros Harizopoulos Kivanc Sabirli Anastassia Ailamaki Babak Falsafi To Share or Not To Share? 351-362 2007 conf/vldb/2007 VLDB http://www.vldb.org/conf/2007/papers/research/p351-johnson.pdf db/conf/vldb/vldb2007.html#JohnsonHPMHSAF07