Oliver Senn wrote:
Hi,
Thanks for your answer.
I used these parameters. But they seem to limit only the number of
parallel maps and parallel reduces separately. They do not prevent the
scheduler from schedule one map and one reduce on the same task tracker
in parallel.
But that's the problem I'm trying to solve. Having at most one task
running on a task tracker at any time (never one map and one reduce
together on one task tracker).
You could do your own scheduler, if you really can't handle the things
in parallel
