Panacea: towards holistic optimization of MapReduce applications.

ABSTRACTMapReduce has emerged as one of the most popular programming models for data parallel enterprise applications. Despite advances in runtime, the opportunities for optimizing MapReduce applications remain largely unexplored. In this paper, we present a framework for performing holistic compiler optimizations on legacy MapReduce applications. We have identified and implemented two optimizations and evaluated them with a set of Hadoop applications on a cluster of Xeon servers. Our experiments show that performance gains of more than 3X can be achieved without user involvement.