Package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair

Interface Summary

Interface	Description
AllocationFileLoaderService.Listener
WeightAdjuster	A pluggable object for altering the weights of apps in the fair scheduler, which is used for example by NewAppWeightBooster to give higher weight to new jobs so that short jobs finish faster.

Class Summary

Class	Description
AllocationConfiguration
AllocationFileLoaderService
AppSchedulable
FairScheduler	A scheduler that schedules resources between a set of queues.
FairSchedulerConfiguration
FifoAppComparator	Order AppSchedulable objects by priority and then by submit time, as in the default scheduler in Hadoop.
FSLeafQueue
FSParentQueue
FSQueue
FSQueueMetrics
FSSchedulerApp	Represents an application attempt from the viewpoint of the Fair Scheduler.
FSSchedulerNode
MaxRunningAppsEnforcer	Handles tracking and enforcement for user and queue maxRunningApps constraints
NewAppWeightBooster	A WeightAdjuster implementation that gives a weight boost to new jobs for a certain amount of time -- by default, a 3x weight boost for 60 seconds.
QueueManager	Maintains a list of queues as well as scheduling parameters for each queue, such as guaranteed share allocations, from the fair scheduler config file.
QueuePlacementPolicy
QueuePlacementRule
QueuePlacementRule.Default	Places all apps in the default queue
QueuePlacementRule.PrimaryGroup	Places apps in queues by primary group of the submitter
QueuePlacementRule.Reject	Rejects all apps
QueuePlacementRule.SecondaryGroupExistingQueue	Places apps in queues by secondary group of the submitter Match will be made on first secondary group that exist in queues
QueuePlacementRule.Specified	Places apps in queues by requested queue of the submitter
QueuePlacementRule.User	Places apps in queues by username of the submitter
Schedulable	A Schedulable represents an entity that can launch tasks, such as a job or a queue.
SchedulingPolicy

Exception Summary

Exception	Description
AllocationConfigurationException	Thrown when the allocation file for QueueManager is malformed.