Did you restart your TaskTrackers after increasing the mapred.tasktracker.map.tasks.maximum value in mapred-site.xml? It is a TaskTracker property, not a per-job one.
On Sun, Sep 30, 2012 at 12:36 AM, Shing Hing Man <mat...@yahoo.com> wrote: > > Hi, > I am running Hadoop 1.03 in Pseudo distributed mode, on a quad core Xeon > processor with > hyper-threading enabled. > When I submit a job to process a file of size about 1.6 GB, only two > concurrent map tasks > are running. > I have set > mapred.tasktracker.map.tasks.maximum to 6. > In job.xml, > mapred.map.tasks =25 > mapred.min.split.size =0 > dfs.block.size = 64MB > How to increase the the number of concurrent map task ? > > Thanks in advance for any assistance ! > > Shing > -- Harsh J
