Hello Bikash, The tasks run on the tasktracker, so that is where you'll need to look for the process ID -- not the JobTracker/client.
Crudely speaking, $ ssh tasktracker01 # or whichever. $ jps | grep Child | cut -d " " -f 1 # And lo, PIDs to play with. On Thu, Sep 29, 2011 at 12:15 AM, bikash sharma <sharmabiks...@gmail.com> wrote: > Hi, > Is it possible to get the process id of each task in a MapReduce job? > When I run a mapreduce job and do a monitoring in linux using ps, i just see > the id of the mapreduce job process but not its constituent map/reduce > tasks. > The use case is to monitor the resource usage of each task by using sar > utility in linux with specific process id of task. > > Thanks, > Bikash > -- Harsh J
