org.apache.hadoop.hbase.master.balancer

Class MaintenanceLoadBalancer

java.lang.Object

org.apache.hadoop.hbase.master.balancer.MaintenanceLoadBalancer

All Implemented Interfaces:

ConfigurationObserver, LoadBalancer, Stoppable

@InterfaceAudience.Private
public class MaintenanceLoadBalancer
extends Object
implements LoadBalancer

a balancer which is only used in maintenance mode.

Field Summary

Fields inherited from interface org.apache.hadoop.hbase.master.LoadBalancer

BOGUS_SERVER_NAME, HBASE_RSGROUP_LOADBALANCER_CLASS

Constructor Summary

Constructors

Constructor and Description
MaintenanceLoadBalancer()

Method Summary

Modifier and Type	Method and Description
List<RegionPlan>	balanceCluster(Map<TableName,Map<ServerName,List<RegionInfo>>> loadOfAllTable)
void	initialize()
boolean	isStopped()
void	onConfigurationChange(org.apache.hadoop.conf.Configuration conf)
void	postMasterStartupInitialize()
ServerName	randomAssignment(RegionInfo regionInfo, List<ServerName> servers)
void	regionOffline(RegionInfo regionInfo)
void	regionOnline(RegionInfo regionInfo, ServerName sn)
Map<ServerName,List<RegionInfo>>	retainAssignment(Map<RegionInfo,ServerName> regions, List<ServerName> servers)
Map<ServerName,List<RegionInfo>>	roundRobinAssignment(List<RegionInfo> regions, List<ServerName> servers)
void	setClusterInfoProvider(ClusterInfoProvider provider)
void	stop(String why)
void	updateBalancerStatus(boolean status)
void	updateClusterMetrics(ClusterMetrics st)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.master.LoadBalancer

updateBalancerLoadInfo

Constructor Detail

MaintenanceLoadBalancer

public MaintenanceLoadBalancer()

Method Detail

stop

public void stop(String why)

Specified by:

stop in interface Stoppable

isStopped

public boolean isStopped()

Specified by:

isStopped in interface Stoppable

updateClusterMetrics

public void updateClusterMetrics(ClusterMetrics st)

Specified by:

updateClusterMetrics in interface LoadBalancer

setClusterInfoProvider

public void setClusterInfoProvider(ClusterInfoProvider provider)

Specified by:

setClusterInfoProvider in interface LoadBalancer

balanceCluster

public List<RegionPlan> balanceCluster(Map<TableName,Map<ServerName,List<RegionInfo>>> loadOfAllTable)
                                throws IOException

Specified by:

balanceCluster in interface LoadBalancer

Throws:

IOException

roundRobinAssignment

public Map<ServerName,List<RegionInfo>> roundRobinAssignment(List<RegionInfo> regions,
                                                             List<ServerName> servers)
                                                      throws IOException

Specified by:

roundRobinAssignment in interface LoadBalancer

Throws:

IOException

retainAssignment

public Map<ServerName,List<RegionInfo>> retainAssignment(Map<RegionInfo,ServerName> regions,
                                                         List<ServerName> servers)
                                                  throws IOException

Specified by:

retainAssignment in interface LoadBalancer

Throws:

IOException

randomAssignment

public ServerName randomAssignment(RegionInfo regionInfo,
                                   List<ServerName> servers)
                            throws IOException

Specified by:

randomAssignment in interface LoadBalancer

Throws:

IOException

initialize

public void initialize()

Specified by:

initialize in interface LoadBalancer

regionOnline

public void regionOnline(RegionInfo regionInfo,
                         ServerName sn)

Specified by:

regionOnline in interface LoadBalancer

regionOffline

public void regionOffline(RegionInfo regionInfo)

Specified by:

regionOffline in interface LoadBalancer

onConfigurationChange

public void onConfigurationChange(org.apache.hadoop.conf.Configuration conf)

Specified by:

onConfigurationChange in interface ConfigurationObserver

Specified by:

onConfigurationChange in interface LoadBalancer

postMasterStartupInitialize

public void postMasterStartupInitialize()

Specified by:

postMasterStartupInitialize in interface LoadBalancer

updateBalancerStatus

public void updateBalancerStatus(boolean status)

Specified by:

updateBalancerStatus in interface LoadBalancer