Contributed by Steve Loughran. (cherry picked from commit ca8b80bf59c0570bb9172208d3a6c993a6854514)
DistCp (distributed copy) is a tool used for large inter/intra-cluster copying. It uses Map/Reduce to effect its distribution, error handling and recovery, and reporting. It expands a list of files and directories into input to map tasks, each of which will copy a partition of the files specified in the source list.