A Comparison of Join Algorithms for Log Processing in MapReduce Spyros Blanas, Jignesh M. Patel Computer Sciences Department University of Wisconsin-Madison {sblanas,jignesh}@cs.wisc.edu Vuk Ercegovac, Jun Rao, Eugene J. Shekita, Yuanyuan Tian IBM Almaden Research Center {vercego,junrao,shekita,ytian}@us.ibm.com ABSTRACT The MapReduce framework is increasingly being used to analyze large volumes o