Hi,
I am trying the smoke test for Hadoop (2.4.1). About “terasort”, below is my
test command, the Map part was completed very fast because it was split into
many subtasks, however the Reduce part takes very long time and only 1 running
Reduce job. Is there a way speed up the reduce phase by
You can set the number of reducers used in any hadoop job from the command
line by using -Dmapred.reduce.tasks=XX.
e.g. hadoop jar hadoop-mapreduce-examples.jar terasort
-Dmapred.reduce.tasks=10 /terasort-input /terasort-output
