title: In hadoop, how to verify number of map tasks running on each slave node individually?
body: <p>I have a Hadoop cluster with head node as master and 7 other nodes configured as slaves each have 8 cores and 8 GB memory. I am playing around with varying the parameter "mapred.tasktracker.map.tasks.maximum" and number of slaves in the slaves configuration file. Now, if my program has to run say 40 tasks, can I see how many tasks ran on each individual slave nodes in some log file or somewhere? Basically, I am looking for Map task distribution among different nodes.</p>