Package org.apache.hadoop.yarn.server.federation.policies.router

Class WeightedRandomRouterPolicy

java.lang.Object

org.apache.hadoop.yarn.server.federation.policies.AbstractConfigurableFederationPolicy

org.apache.hadoop.yarn.server.federation.policies.router.AbstractRouterPolicy

org.apache.hadoop.yarn.server.federation.policies.router.WeightedRandomRouterPolicy

All Implemented Interfaces:

ConfigurableFederationPolicy, FederationRouterPolicy

Direct Known Subclasses:

LocalityRouterPolicy

public class WeightedRandomRouterPolicy
extends AbstractRouterPolicy

This policy implements a weighted random sample among currently active sub-clusters.

Constructor Summary

Constructors

Constructor	Description
WeightedRandomRouterPolicy()

Method Summary

Modifier and Type	Method	Description
protected SubClusterId	chooseSubCluster(java.lang.String queue, java.util.Map<SubClusterId,SubClusterInfo> preSelectSubclusters)	This method is implemented by the specific policy, and it is used to route both reservations, and applications among a given set of sub-clusters.

Methods inherited from class org.apache.hadoop.yarn.server.federation.policies.router.AbstractRouterPolicy

getHomeSubcluster, getReservationHomeSubcluster, prefilterSubClusters, validate, validate

Methods inherited from class org.apache.hadoop.yarn.server.federation.policies.AbstractConfigurableFederationPolicy

getActiveSubclusters, getIsDirty, getPolicyContext, getPolicyInfo, reinitialize, setPolicyContext, setPolicyInfo

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.yarn.server.federation.policies.ConfigurableFederationPolicy

reinitialize

Constructor Detail

WeightedRandomRouterPolicy

public WeightedRandomRouterPolicy()

Method Detail

chooseSubCluster

protected SubClusterId chooseSubCluster(java.lang.String queue,
                                        java.util.Map<SubClusterId,SubClusterInfo> preSelectSubclusters)
                                 throws org.apache.hadoop.yarn.exceptions.YarnException

Description copied from class: AbstractRouterPolicy

This method is implemented by the specific policy, and it is used to route both reservations, and applications among a given set of sub-clusters.

Specified by:

chooseSubCluster in class AbstractRouterPolicy

Parameters:

queue - the queue for this application/reservation

preSelectSubclusters - a pre-filter set of sub-clusters

Returns:

the chosen sub-cluster

Throws:

org.apache.hadoop.yarn.exceptions.YarnException - if the policy fails to choose a sub-cluster