The different schedulers available in YARN are:
FIFO scheduler - This places applications in a queue and runs them in the order of submission (first in, first out). It is not desirable, as a long-running application might block the small running applications
Capacity scheduler - A separate dedicated queue allows the small job to start as soon as it is submitted. The large job finishes later compared to using the FIFO scheduler
Fair scheduler - There is no need to reserve a set amount of capacity since it will dynamically balance resources between all the running jobs
