org.apache.hadoop.hbase.favored

Class FavoredNodesManager

java.lang.Object

org.apache.hadoop.hbase.favored.FavoredNodesManager

@InterfaceAudience.Private
public class FavoredNodesManager
extends Object

FavoredNodesManager is responsible for maintaining favored nodes info in internal cache and META table. Its the centralized store for all favored nodes information. All reads and updates should be done through this class. There should only be one instance of FavoredNodesManager in Master. FavoredNodesPlan and favored node information from SnapshotOfRegionAssignmentFromMeta should not be used outside this class (except for may be tools that only read or test cases). All other classes including Favored balancers and FavoredNodeAssignmentHelper should use FavoredNodesManager for any read/write/deletes to favored nodes.

Constructor Summary

Constructors

Constructor and Description
FavoredNodesManager(MasterServices masterServices)

Method Summary

Modifier and Type	Method and Description
void	deleteFavoredNodesForRegions(Collection<HRegionInfo> regionInfoList)
static Set<HRegionInfo>	filterNonFNApplicableRegions(Collection<HRegionInfo> regions) Filter and return regions for which favored nodes is not applicable.
int	getDataNodePort()
List<ServerName>	getFavoredNodes(HRegionInfo regionInfo)
List<ServerName>	getFavoredNodesWithDNPort(HRegionInfo regionInfo)
RackManager	getRackManager()
Map<ServerName,List<Integer>>	getReplicaLoad(List<ServerName> servers)
void	initialize(SnapshotOfRegionAssignmentFromMeta snapshotOfRegionAssignment)
static boolean	isFavoredNodeApplicable(HRegionInfo regionInfo)
void	updateFavoredNodes(Map<HRegionInfo,List<ServerName>> regionFNMap)

Methods inherited from class java.lang.Object

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

Constructor Detail

FavoredNodesManager

public FavoredNodesManager(MasterServices masterServices)

Method Detail

initialize

public void initialize(SnapshotOfRegionAssignmentFromMeta snapshotOfRegionAssignment)
                throws HBaseIOException

Throws:

HBaseIOException

getDataNodePort

public int getDataNodePort()

getFavoredNodes

public List<ServerName> getFavoredNodes(HRegionInfo regionInfo)

isFavoredNodeApplicable

public static boolean isFavoredNodeApplicable(HRegionInfo regionInfo)

filterNonFNApplicableRegions

public static Set<HRegionInfo> filterNonFNApplicableRegions(Collection<HRegionInfo> regions)

Filter and return regions for which favored nodes is not applicable.

Parameters:

regions - - collection of regions

Returns:

set of regions for which favored nodes is not applicable

getFavoredNodesWithDNPort

public List<ServerName> getFavoredNodesWithDNPort(HRegionInfo regionInfo)

updateFavoredNodes

public void updateFavoredNodes(Map<HRegionInfo,List<ServerName>> regionFNMap)
                        throws IOException

Throws:

IOException

getReplicaLoad

public Map<ServerName,List<Integer>> getReplicaLoad(List<ServerName> servers)

deleteFavoredNodesForRegions

public void deleteFavoredNodesForRegions(Collection<HRegionInfo> regionInfoList)

getRackManager

public RackManager getRackManager()