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...mrlapply - run lapply across a Hadoop cluster mrsubsetf - subset a file according to an R function mtapplyf - run a tapply on a file - mrmapreduce - run a map reduce algorithm on a file or group of files. The user provides a mapper and reducer. The are also some shared memory operations such as mrread,mrtake,mrput. Currently, it is at a proof of concept stage and much work is required before it is production ready. However, for the adventurous, it is possible to use it to process large data. For more information and examples please visit this page: http://www.stat.purdue.edu/~sguha/rhipe...