I think that Anthony is right. Task capacity has to been set at
mapred-default.html, and restart the cluster.
Anthony Urso
2011/7/2 <praveen.pe...@nokia.com>
> 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" <antho...@cs.ucla.edu>
> wrote:
>
> > On Fri, Jul 1, 2011 at 1:03 PM, <praveen.pe...@nokia.com> 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
>
--
- Juwei
