AFAIK 0.15.x does not support different mapred.tasktracker.tasks.maximum per node. It's a per cluster setting. So whatever's in you hadoop-site.xml is what will be used.
I think this is something coming in 0.16.x though. Espen On 12/3/07, Jason Venner <[EMAIL PROTECTED]> wrote: > We have jobs that require different resources and as such saturate our > machines at different levels or parallelization. > What we want to do in the driver is set the number of simultaneous jobs > per node. > > JobClient client = new JobClient(); > Configuration configuration = new Configuration(); > configuration.setInt( "mapred.tasktracker.tasks.maximum", 7); > JobConf conf = new JobConf(configuration,MergeNewSeenDriver.class); > > System.err.println( "configured maximum tasks is " + conf.get( > "mapred.tasktracker.tasks.maximum" )); > > But this doesn't seem to work. The only success we have had is using > multithreaded map runner, but then we don't get to run multiple reduces > at a time on the machines. > > Any suggestions? >
