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

Interface MultiNodeLookupPolicy<N extends SchedulerNode>

All Known Implementing Classes:

ResourceUsageMultiNodeLookupPolicy

public interface MultiNodeLookupPolicy<N extends SchedulerNode>

This class has the following functionality.

Provide an interface for MultiNodeLookupPolicy so that different placement allocator can choose nodes based on need.

Method Summary

Modifier and Type	Method	Description
void	addAndRefreshNodesSet(java.util.Collection<N> nodes, java.lang.String partition)	Refresh working nodes set for re-ordering based on the algorithm selected.
java.util.Set<N>	getNodesPerPartition(java.lang.String partition)	Get sorted nodes per partition.
java.util.Iterator<N>	getPreferredNodeIterator(java.util.Collection<N> nodes, java.lang.String partition)	Get iterator of preferred node depends on requirement and/or availability.

Method Detail

getPreferredNodeIterator

java.util.Iterator<N> getPreferredNodeIterator(java.util.Collection<N> nodes,
                                               java.lang.String partition)

Get iterator of preferred node depends on requirement and/or availability.

Parameters:

nodes - List of Nodes

partition - node label

Returns:

iterator of preferred node

addAndRefreshNodesSet

void addAndRefreshNodesSet(java.util.Collection<N> nodes,
                           java.lang.String partition)

Refresh working nodes set for re-ordering based on the algorithm selected.

Parameters:

nodes - a collection working nm's.

partition - node label

getNodesPerPartition

java.util.Set<N> getNodesPerPartition(java.lang.String partition)

Get sorted nodes per partition.

Parameters:

partition - node label

Returns:

collection of sorted nodes