Are you sure? AFAIK all mapred.xxx properties can be set via job config. I also read on yahoo tutorial that this property can be either set in hadoop-site.XML or job config. May be someone can confirm this who have really used this property.
Praveen On Jul 1, 2011, at 4:46 PM, "ext Anthony Urso" <[email protected]> wrote: > On Fri, Jul 1, 2011 at 1:03 PM, <[email protected]> wrote: >> Hi all, >> >> I am using hadoop 0.20.2. I am setting the property >> mapred.tasktracker.map.tasks.maximum = 4 (same for reduce also) on my job >> conf but I am still seeing max of only 2 map and reduce tasks on each node. >> I know my machine can run 4 maps and 4 reduce tasks in parallel. Is this a >> bug in 0.20.2 or am I doing something wrong? >> >> > > If I remember correctly, you have to set this in your hadoop-site.xml > and restart your job tracker and task trackers. > >> >> Configuration conf = new Configuration(); >> >> conf.set("mapred.tasktracker.map.tasks.maximum", "4"); >> >> conf.set("mapred.tasktracker.reduce.tasks.maximum", "4"); >> >> >> >> Thanks >> >> Praveen
