Let us go through the overview of schedulers. YARN supports three types of Schedulers – FIFO Scheduler, Fair Scheduler, and Capacity Scheduler.
- FIFO Scheduler – default with plain vanilla Hadoop and typically used for exploratory purposes.
- Fair Scheduler – Resources will be allocated to all the subsequent jobs in Fair Manner, default with Cloudera distribution.
- Capacity Scheduler – Nothing but FIFO Scheduler within each queue, default with Hortonworks distribution.