Gu wrote:
How can I use in some case MultithreadedMapRunner, and in some case
MapRunner for different jobs?
Use JobConf#setMapRunnerClass() on jobs that you want to override the
default MapRunner, with, e.g. MultithreadedMapRunner.
Do I have to use one hadoop-site.xml for one job? But I want to all jobs in
one jobs.jar?
The job.xml is generated from a JobConf is independent of the job.jar,
so you can use a single hadoop-site.xml and a single job.jar with
multiple jobs whose other JobConf parameters vary.
Doug
