As I understand it, 1) set the variable to 1 as you say, and 2) specify the number of workers to the number of nodes - 1 (for the master). When you run a job you can look at the 'map' link on the tasktracker ui to see all the workers plus master.
On Thu, Oct 30, 2014 at 7:11 AM, Matthew Saltz <[email protected]> wrote: > Hi everyone, > > Is there a good way (a configuration I'm guessing) to prevent more than one > worker from running per node? I saw in this thread to use > mapred.tasktracker.map.tasks.maximum=1, but that doesn't seem to be working. > Thanks for the help. > > Best, > Matthew > -- Matthew Cornell | [email protected] | 413-626-3621 | 34 Dickinson Street, Amherst MA 01002 | matthewcornell.org
