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Job Pools resource re-assignment does not work

Question asked by timo on Aug 12, 2012
Latest reply on Aug 16, 2012 by abhinav
jobs launched are ending up in same job pool and with in the pool they are queued. using scheduler dashboard changing jobs to shift to new job pool is not working and the jobs which came late in the queue are waiting for long running jobs to be finished. What is the optimal way to configure the job tracker to get optimal performance and all jobs are getting fare share of mappers and reducers this way long running task will take long time but job submitted with short run time can get its share and finish the job. Please post any pointers on best practices to configure job tracker.