org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies
Class ComputeFairShares

java.lang.Object
  org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies.ComputeFairShares

public class ComputeFairShares
extends Object

Contains logic for computing the fair shares. A Schedulable's fair share is Resource it is entitled to, independent of the current demands and allocations on the cluster. A Schedulable whose resource consumption lies at or below its fair share will never have its containers preempted.

Constructor Summary

ComputeFairShares()

Method Summary

static void	computeShares(Collection<? extends Schedulable> schedulables, org.apache.hadoop.yarn.api.records.Resource totalResources, ResourceType type) Compute fair share of the given schedulables.Fair share is an allocation of shares considering only active schedulables ie schedulables which have running apps.
static void	computeSteadyShares(Collection<? extends FSQueue> queues, org.apache.hadoop.yarn.api.records.Resource totalResources, ResourceType type) Compute the steady fair share of the given queues.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ComputeFairShares

public ComputeFairShares()

Method Detail

computeShares

public static void computeShares(Collection<? extends Schedulable> schedulables,
                                 org.apache.hadoop.yarn.api.records.Resource totalResources,
                                 ResourceType type)

Compute fair share of the given schedulables.Fair share is an allocation of shares considering only active schedulables ie schedulables which have running apps.

Parameters:

schedulables -

totalResources -

type -

computeSteadyShares

public static void computeSteadyShares(Collection<? extends FSQueue> queues,
                                       org.apache.hadoop.yarn.api.records.Resource totalResources,
                                       ResourceType type)

Compute the steady fair share of the given queues. The steady fair share is an allocation of shares considering all queues, i.e., active and inactive.

Parameters:

queues -

totalResources -

type -