running MapReduce hadoop on multi node cluster

Discussion created by hamzaa on Jun 24, 2016
Latest reply on Jun 24, 2016 by hamzaa

I have cluster in amazon (EMR), cluster with 3 node [1master ,2 slaves],when run program with 100 mappers and 1 reducer,don't found any change in time in run program.

how run parallel map tasks on two slaves?