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

Class PartitionBalancer

java.lang.Object

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

public class PartitionBalancer
extends Object

The SeriesPartitionSlotBalancer provides interfaces to generate optimal Partition allocation and migration plans

Constructor Summary

Constructors

Constructor	Description
PartitionBalancer(IManager configManager)

Method Summary

Modifier and Type	Method	Description
Map<String,DataPartitionTable>	allocateDataPartition(Map<String,Map<TSeriesPartitionSlot,TTimeSlotList>> unassignedDataPartitionSlotsMap)	Allocate DataPartitions
Map<String,SchemaPartitionTable>	allocateSchemaPartition(Map<String,List<TSeriesPartitionSlot>> unassignedSchemaPartitionSlotsMap)	Allocate SchemaPartitions
void	clearDataPartitionPolicyTable(String database)
void	clearPartitionBalancer()	Clear the PartitionBalancer when the current ConfigNode is no longer the leader.
void	reBalanceDataPartitionPolicy(String database)	Re-balance the DataPartitionPolicyTable.
void	setupPartitionBalancer()	Set up the PartitionBalancer when the current ConfigNode becomes leader.

Methods inherited from class java.lang.Object

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

Constructor Details

PartitionBalancer

public PartitionBalancer(IManager configManager)

Method Details

allocateSchemaPartition

public Map<String,SchemaPartitionTable> allocateSchemaPartition(Map<String,List<TSeriesPartitionSlot>> unassignedSchemaPartitionSlotsMap)
                                                         throws NoAvailableRegionGroupException

Allocate SchemaPartitions

Parameters:

unassignedSchemaPartitionSlotsMap - SchemaPartitionSlots that should be assigned

Returns:

Map<DatabaseName, SchemaPartitionTable>, the allocating result

Throws:

NoAvailableRegionGroupException

allocateDataPartition

public Map<String,DataPartitionTable> allocateDataPartition(Map<String,Map<TSeriesPartitionSlot,TTimeSlotList>> unassignedDataPartitionSlotsMap)
                                                     throws DatabaseNotExistsException,
NoAvailableRegionGroupException

Allocate DataPartitions

Parameters:

unassignedDataPartitionSlotsMap - DataPartitionSlots that should be assigned

Returns:

Map<DatabaseName, DataPartitionTable>, the allocating result

Throws:

DatabaseNotExistsException - If some specific Databases don't exist

NoAvailableRegionGroupException - If there are no available RegionGroups

reBalanceDataPartitionPolicy

public void reBalanceDataPartitionPolicy(String database)

Re-balance the DataPartitionPolicyTable.

Parameters:

database - Database name

setupPartitionBalancer

public void setupPartitionBalancer()

Set up the PartitionBalancer when the current ConfigNode becomes leader.

clearPartitionBalancer

public void clearPartitionBalancer()

Clear the PartitionBalancer when the current ConfigNode is no longer the leader.

clearDataPartitionPolicyTable

public void clearDataPartitionPolicyTable(String database)