Feature comparison

The features of both schedulers have become similar over time. The current feature list and differences between the two schedulers is listed in the tables.

Supported Features

Feature List Capacity Scheduler Fair Scheduler Comments
Queues Hierarchical Queues yes yes
Elastic Queue Capacity for better resource sharing yes yes
Percentage Based Resource Configuration in Queues yes yes Percentages and absolute resources settings cannot be used simultaneous.
Auto Queue Creation yes yes
User Mapping (user/group to queue mapping) yes yes
CLI/REST API support to manage queues yes yes
Move applications between queues yes yes
Dynamic Queue creation/deletion/modification yes yes
Reservation support in queues yes yes
Authorization Authorization control (ACLs in Queues for submit/manage/admin) yes yes
Third party ACL control (Ranger) yes yes
Application Placement Node Labels support yes no
Hive placement integration yes yes
Node Attributes support yes no
Placement constraints support yes no Supported constraints are limited in the current implementation.
Node Locality yes yes
Locality Delay control yes yes
User limit quota management yes yes
AM resource quota management yes yes
Queue Priority yes no Indirectly managed through queue weights.
Maximum and Minimum allocation limit per container unit yes yes
Scheduling Asynchronous scheduling support yes yes Implementation differs between the schedulers and should not be treated as equivalent.
Multiple resource types support (CPU, Memory, GPU, and so on) yes yes
Queue Ordering Policies (Fair, FIFO, and so on) yes yes
Multiple container assignments per heartbeat yes yes
Preemption Inter Queue preemption support yes yes
Intra Queue preemption support yes yes
Reservation based preemption yes yes
Queue Priority based preemption yes no Queue weights are taken into account when preempting decisions are made.

Application

Support

First class Concept of application yes yes
Application priority yes yes
Application timeout yes yes
Moving Application across queues yes yes
High Availability stateful application recovery yes yes

Roadmap Features

Feature List Capacity Scheduler Fair Scheduler Comments
Queues Absolute Resource Configuration in Queues yes yes Percentages and absolute resources settings cannot be usedsimultaneously.
Application Placement Maximum number of applications no yes Indirectly managed through AM resource quotas.
Scheduling Application Size Based Fairness no yes