Hi Mathijs,
Mathijs Homminga wrote:
We have some troubles with the reduce phase of our job.
Is it possible to re-execute the reduce tasks without the need to do all
map tasks again?
That the MR-framework already does... you don't have to re-execute
the maps for the *failed* reduces. Are you noticing something else?
What are the 'troubles' you allude to? Also with once we get
HADOOP-1127 in, you should try turing on 'speculative execution' - that
helps when some tasks are very slow w.r.t other similar tasks.
Arun
Thanks!
Mathijs Homminga
