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From Pierre ANCELOT <pierre...@gmail.com>
Subject Dynamically set mapred.tasktracker.map.tasks.maximum from inside a job.
Date Wed, 30 Jun 2010 09:35:14 GMT
Hi everyone :)
There's something I'm probably doing wrong but I can't seem to figure out
I have two hadoop programs running one after the other.
This is done because they don't have the same needs in term of processor in
memory, so by separating them I optimize each task better.
Fact is, I need for the first job on every node
mapred.tasktracker.map.tasks.maximum set to 12.
For the second task, I need it to be set to 20.
so by default I set it to 12 and in the second job's code, I set this:

        Configuration hadoopConfiguration = new Configuration();

But when running the job, instead of having the 20 tasks on each node as
expected, I have 12....
Any idea please?

Thank you.

Ego sum quis ego servo
"Je suis ce que je prot├Ęge"
"I am what I protect"

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