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

Class RegionBalancer

java.lang.Object

org.apache.iotdb.confignode.manager.load.balancer.RegionBalancer

public class RegionBalancer
extends Object

The RegionBalancer provides interfaces to generate optimal Region allocation and migration plans

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	RegionBalancer.RegionGroupAllocatePolicy

Constructor Summary

Constructors

Constructor	Description
RegionBalancer(IManager configManager)

Method Summary

Modifier and Type	Method	Description
CreateRegionGroupsPlan	genRegionGroupsAllocationPlan(Map<String,Integer> allotmentMap, TConsensusGroupType consensusGroupType)	Generate a RegionGroups' allocation plan(CreateRegionGroupsPlan)

Methods inherited from class java.lang.Object

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

Constructor Details

RegionBalancer

public RegionBalancer(IManager configManager)

Method Details

genRegionGroupsAllocationPlan

public CreateRegionGroupsPlan genRegionGroupsAllocationPlan(Map<String,Integer> allotmentMap,
 TConsensusGroupType consensusGroupType)
                                                     throws NotEnoughDataNodeException,
DatabaseNotExistsException

Generate a RegionGroups' allocation plan(CreateRegionGroupsPlan)

Parameters:

allotmentMap - Map<DatabaseName, RegionGroup allotment>

consensusGroupType - TConsensusGroupType of the new RegionGroups

Returns:

CreateRegionGroupsPlan

Throws:

NotEnoughDataNodeException - When the number of DataNodes is not enough for allocation

DatabaseNotExistsException - When some StorageGroups don't exist