This property is no longer used. You probably need either hadoop.tmp.dir or mapred.local.dir. The latter controls where map intermediates and partitioned reducer inputs go to, in MR.
>From within an Mapper or Reducer, if you want to use temporary files, you can use the regular Java API's File.createTempFile/etc., or refer to the mapred.child.tmp property from within the Mapper/Reducer, which refers to ./tmp (within the task's local working directory, a path derived out of mapred.local.dir by the framework). On Fri, Apr 27, 2012 at 11:38 AM, Satoshi Noto <nt3...@gmail.com> wrote: > Hi all, > > The default config mapred-default.xml has a property "mapred.temp.dir". > How to use "mapred.temp.dir" ? > > I did grep "mapred.temp.dir" to hadoop-0.20.2 sources, > but I could not get line from mapred sources. > > Is this property not used by mapreduce framework ? > And if we want to use temporary directory in mapreduce job, > we should use this property in own code ? > > > Regards, > Satoshi -- Harsh J
