Aaron Kimball wrote:
Finally, there's a third scheduler called the Capacity scheduler. It's similar to the fair scheduler, in that it allows guarantees of minimum availability for different pools. I don't know how it apportions additional extra resources though -- this is the one I'm least familiar with. Someone else will have to chime in here.
There's a dynamic priority scheduler in the patch queue, that I've promised to commit this week. Its the one with a notion of currency: you pay for your work/priority. At peak times, work costs more
https://issues.apache.org/jira/browse/HADOOP-4768
