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

Class GreedyLeaderBalancer

java.lang.Object

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

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

public class GreedyLeaderBalancer
extends AbstractLeaderBalancer

Leader distribution balancer that uses greedy algorithm

Field Summary

Fields inherited from class org.apache.iotdb.confignode.manager.load.balancer.router.leader.AbstractLeaderBalancer

CFD_POLICY, databaseRegionGroupMap, dataNodeStatisticsMap, GREEDY_POLICY, regionGroupIntersection, regionLeaderMap, regionLocationMap, regionStatisticsMap

Constructor Summary

Constructors

Constructor	Description
GreedyLeaderBalancer()

Method Summary

Modifier and Type	Method	Description
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.

Methods inherited from class org.apache.iotdb.confignode.manager.load.balancer.router.leader.AbstractLeaderBalancer

clear, initialize, isDataNodeAvailable, isRegionAvailable

Methods inherited from class java.lang.Object

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

Constructor Details

GreedyLeaderBalancer

public GreedyLeaderBalancer()

Method Details

generateOptimalLeaderDistribution

public 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)

Description copied from class: AbstractLeaderBalancer

Generate an optimal leader distribution.

Specified by:

generateOptimalLeaderDistribution in class AbstractLeaderBalancer

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