Mark, On Fri, May 20, 2011 at 10:17 AM, Mark question <[email protected]> wrote: > This is puzzling me ... > > With a mapper producing output of size ~ 400 MB ... which one is supposed > to be faster? > > 1) output collector: which will write to local file then copy to HDFS since > I don't have reducers.
A regular map-only job does not write to the local FS, it writes to the HDFS directly (i.e., a local DN if one is found). -- Harsh J
