Hi, I was going through the job schedulers of Hadoop and could not see any major operational difference between the capacity scheduler and the fair share scheduler apart from the fact that fair share scheduler supports preemption and capacity scheduler doesn't.
Another thing is the former creates logical pools based on certain attribute like username , user group etc and the later has a notion of job queues. Can someone point me to any other major differences between these two types of schedulers. Another question in this regard is the capacity scheduler uses a FIFO queue.So its still possible that a high priority long running job using all the capacity allocated to the queue to block all the other jobs after it in the queue.I think this is the expected behavior , but wanted to confirm. Thanks, Rahul
