org.apache.hadoop.mapreduce.task.reduce

Class MapHost

java.lang.Object

org.apache.hadoop.mapreduce.task.reduce.MapHost

@InterfaceAudience.LimitedPrivate(value="MapReduce")
@InterfaceStability.Unstable
public class MapHost
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapHost.State

Constructor Summary

Constructors

Constructor and Description
MapHost(String hostName, String baseUrl)

Method Summary

Methods

Modifier and Type	Method and Description
void	addKnownMap(TaskAttemptID mapId)
List<TaskAttemptID>	getAndClearKnownMaps()
String	getBaseUrl()
String	getHostName()
int	getNumKnownMapOutputs()
MapHost.State	getState()
MapHost.State	markAvailable() Called when the node is done with its penalty or done copying.
void	markBusy()
void	markPenalized()
void	penalize() Mark the host as penalized
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MapHost

public MapHost(String hostName,
       String baseUrl)

Method Detail

getState

public MapHost.State getState()

getHostName

public String getHostName()

getBaseUrl

public String getBaseUrl()

addKnownMap

public void addKnownMap(TaskAttemptID mapId)

getAndClearKnownMaps

public List<TaskAttemptID> getAndClearKnownMaps()

markBusy

public void markBusy()

markPenalized

public void markPenalized()

getNumKnownMapOutputs

public int getNumKnownMapOutputs()

markAvailable

public MapHost.State markAvailable()

Called when the node is done with its penalty or done copying.

Returns:

the host's new state

toString

public String toString()

Overrides:

toString in class Object

penalize

public void penalize()

Mark the host as penalized