Hi Pallavi, This doesn't sound right. Can you visit http://jobtracker:50030/scheduler?advanced and maybe send a screenshot? And also upload the allocations.xml file you're using?
It sounds like you've managed to set either userMaxJobsDefault or maxRunningJobs for that user to 1. -Todd On Thu, Jan 14, 2010 at 9:05 PM, Pallavi Palleti < pallavi.pall...@corp.aol.com> wrote: > Hi all, > > I am experimenting with fair scheduler in a cluster of 10 machines. The > users are given default values("0") for minMaps and minReduces in fair > scheduler parameters. When I tried to run two jobs using the same username, > the fair scheduler is giving 100% fair share to first job(needs 2 mappers) > and the second job(needs10 mappers) is in waiting mode though the cluster is > totally idle. Allowing these jobs to run simultaneously would take only 10% > of total available mappers. However, the second job is not allowed to run > till the first job is over. It would be great if some one can suggest some > parameter tuning which can allow efficient utilization of cluster. Efficient > I mean, allowing jobs to run when the cluster is idle rather letting them in > waiting mode. I am not sure whether setting "minMaps, minReduces" for each > user would resolve the issue. Kindly clarify. > > Thanks > Pallavi >