https://goo.gl/uaW60y In hadoop scheduler You can make a best effort line that runs applications when the bunch is underutilized. In Fair Scheduler, a line with weight 0.0 will just run applications if there is extra limit in the group. As it were, every one of the employments in the priority jobs line will be designated to start with, and afterward Fair Scheduler will assign any such extra ability to the best effort jobs queue In Fair Scheduler, a line with weight 0.0 will just run applications if there is extra limit in the bunch. At the end of the day, every one of the occupations in the priority jobs line will be designated to start with, and afterward Fair Scheduler will apportion any such extra ability to the best effort employments line. Hadoop training by Prwatech
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