Package org.apache.iotdb.confignode.manager.load.balancer.router.leader

Class AbstractLeaderBalancer

java.lang.Object

org.apache.iotdb.confignode.manager.load.balancer.router.leader.AbstractLeaderBalancer

Direct Known Subclasses:

GreedyLeaderBalancer, MinCostFlowLeaderBalancer

public abstract class AbstractLeaderBalancer
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CFD_POLICY
protected final Map<String,List<TConsensusGroupId>>	databaseRegionGroupMap
protected final Map<Integer,NodeStatistics>	dataNodeStatisticsMap
static final String	GREEDY_POLICY
protected final Set<TConsensusGroupId>	regionGroupIntersection
protected final Map<TConsensusGroupId,Integer>	regionLeaderMap
protected final Map<TConsensusGroupId,Set<Integer>>	regionLocationMap
protected final Map<TConsensusGroupId,Map<Integer,RegionStatistics>>	regionStatisticsMap

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractLeaderBalancer()

Method Summary

Modifier and Type	Method	Description
protected void	clear()
abstract Map<TConsensusGroupId,Integer>	generateOptimalLeaderDistribution(Map<String,List<TConsensusGroupId>> databaseRegionGroupMap, Map<TConsensusGroupId,Set<Integer>> regionLocationMap, Map<TConsensusGroupId,Integer> regionLeaderMap, Map<Integer,NodeStatistics> dataNodeStatisticsMap, Map<TConsensusGroupId,Map<Integer,RegionStatistics>> regionStatisticsMap)	Generate an optimal leader distribution.
protected void	initialize(Map<String,List<TConsensusGroupId>> databaseRegionGroupMap, Map<TConsensusGroupId,Set<Integer>> regionLocationMap, Map<TConsensusGroupId,Integer> regionLeaderMap, Map<Integer,NodeStatistics> dataNodeStatisticsMap, Map<TConsensusGroupId,Map<Integer,RegionStatistics>> regionStatisticsMap)
protected boolean	isDataNodeAvailable(int dataNodeId)
protected boolean	isRegionAvailable(TConsensusGroupId regionGroupId, int dataNodeId)

Methods inherited from class java.lang.Object

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

Field Details

GREEDY_POLICY

public static final String GREEDY_POLICY

See Also:

• Constant Field Values

CFD_POLICY

public static final String CFD_POLICY

See Also:

• Constant Field Values

regionGroupIntersection

protected final Set<TConsensusGroupId> regionGroupIntersection

databaseRegionGroupMap

protected final Map<String,List<TConsensusGroupId>> databaseRegionGroupMap

regionLocationMap

protected final Map<TConsensusGroupId,Set<Integer>> regionLocationMap

regionLeaderMap

protected final Map<TConsensusGroupId,Integer> regionLeaderMap

dataNodeStatisticsMap

protected final Map<Integer,NodeStatistics> dataNodeStatisticsMap

regionStatisticsMap

protected final Map<TConsensusGroupId,Map<Integer,RegionStatistics>> regionStatisticsMap

Constructor Details

AbstractLeaderBalancer

protected AbstractLeaderBalancer()

Method Details

initialize

protected void initialize(Map<String,List<TConsensusGroupId>> databaseRegionGroupMap,
 Map<TConsensusGroupId,Set<Integer>> regionLocationMap,
 Map<TConsensusGroupId,Integer> regionLeaderMap,
 Map<Integer,NodeStatistics> dataNodeStatisticsMap,
 Map<TConsensusGroupId,Map<Integer,RegionStatistics>> regionStatisticsMap)

isDataNodeAvailable

protected boolean isDataNodeAvailable(int dataNodeId)

isRegionAvailable

protected boolean isRegionAvailable(TConsensusGroupId regionGroupId,
 int dataNodeId)

clear

protected void clear()

generateOptimalLeaderDistribution

public abstract Map<TConsensusGroupId,Integer> generateOptimalLeaderDistribution(Map<String,List<TConsensusGroupId>> databaseRegionGroupMap,
 Map<TConsensusGroupId,Set<Integer>> regionLocationMap,
 Map<TConsensusGroupId,Integer> regionLeaderMap,
 Map<Integer,NodeStatistics> dataNodeStatisticsMap,
 Map<TConsensusGroupId,Map<Integer,RegionStatistics>> regionStatisticsMap)

Generate an optimal leader distribution.

Parameters:

databaseRegionGroupMap - RegionGroup held by each Database

regionLocationMap - All RegionGroups the cluster currently have

regionLeaderMap - The current leader distribution of each RegionGroup

dataNodeStatisticsMap - The current statistics of each DataNode

regionStatisticsMap - The current statistics of each Region

Returns:

Map<TConsensusGroupId, Integer>, The optimal leader distribution