You may need to upgrade, but 15.1 does just fine with multiple jobs in the cluster. Use conf.setNumMapTasks(int) and conf.setNumReduceTasks(int).
On 1/9/08 11:25 AM, "Xavier Stevens" <[EMAIL PROTECTED]> wrote: > Does Hadoop support running simultaneous jobs? If so, what parameters > do I need to set in my job configuration? We basically want to give a > job that takes a really long time, half of the total resources of the > cluster so other jobs don't queue up behind it. > > I am using Hadoop 0.14.2 currently. I tried setting > mapred.tasktracker.tasks.maximum to be half of the maximum specified in > mapred-default.xml. This shows the change in the web administration > page for the job, but it has no effect on the actual numbers of tasks > running. > > Thanks, > > Xavier >
