The name of a map task attempt is
attempt_201002092101_0063_m_N_X (N=1,.... # of map tasks)
and that of a reduce is
attempt_201002092101_0063_r_M_X where X is maybe 0,1,2 ..
(M =1 .... # o reduce tasks)
Thus during the map stage, the unique number is given by N or M.
Is there configuration variable so that I can get the name of this task file?
Then i can arrive at the components: date. job-number, task-#, task atempt #