org.apache.hadoop.hbase.rsgroup

类 RSGroupBasedLoadBalancer

java.lang.Object

org.apache.hadoop.hbase.rsgroup.RSGroupBasedLoadBalancer

所有已实现的接口:

org.apache.hadoop.conf.Configurable, ConfigurationObserver, LoadBalancer, RSGroupableBalancer, Stoppable

@InterfaceAudience.Private
public class RSGroupBasedLoadBalancer
extends Object
implements RSGroupableBalancer, LoadBalancer

GroupBasedLoadBalancer, used when Region Server Grouping is configured (HBase-6721) It does region balance based on a table's group membership. Most assignment methods contain two exclusive code paths: Online - when the group table is online and Offline - when it is unavailable. During Offline, assignments are assigned based on cached information in zookeeper. If unavailable (ie bootstrap) then regions are assigned randomly. Once the GROUP table has been assigned, the balancer switches to Online and will then start providing appropriate assignments for user tables.

字段概要

字段

限定符和类型	字段和说明
static String	HBASE_GROUP_LOADBALANCER_CLASS Config for pluggable load balancers

从接口继承的字段 org.apache.hadoop.hbase.rsgroup.RSGroupableBalancer

HBASE_RSGROUP_LOADBALANCER_CLASS

从接口继承的字段 org.apache.hadoop.hbase.master.LoadBalancer

BOGUS_SERVER_NAME

构造器概要

构造器

构造器和说明
RSGroupBasedLoadBalancer()
RSGroupBasedLoadBalancer(RSGroupInfoManager RSGroupInfoManager)

方法概要

方法

限定符和类型	方法和说明
List<RegionPlan>	balanceCluster(Map<ServerName,List<HRegionInfo>> clusterState)
List<RegionPlan>	balanceCluster(TableName tableName, Map<ServerName,List<HRegionInfo>> clusterState)
org.apache.hadoop.conf.Configuration	getConf()
Set<HRegionInfo>	getMisplacedRegions(Map<HRegionInfo,ServerName> regions)
Map<HRegionInfo,ServerName>	immediateAssignment(List<HRegionInfo> regions, List<ServerName> servers)
void	initialize()
boolean	isOnline()
boolean	isStopped()
void	onConfigurationChange(org.apache.hadoop.conf.Configuration conf)
void	postMasterStartupInitialize()
ServerName	randomAssignment(HRegionInfo region, List<ServerName> servers)
void	regionOffline(HRegionInfo regionInfo)
void	regionOnline(HRegionInfo regionInfo, ServerName sn)
Map<ServerName,List<HRegionInfo>>	retainAssignment(Map<HRegionInfo,ServerName> regions, List<ServerName> servers)
Map<ServerName,List<HRegionInfo>>	roundRobinAssignment(List<HRegionInfo> regions, List<ServerName> servers)
void	setClusterStatus(ClusterStatus st)
void	setConf(org.apache.hadoop.conf.Configuration conf)
void	setMasterServices(MasterServices masterServices)
void	stop(String why)
void	updateBalancerStatus(boolean status)

从类继承的方法 java.lang.Object

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

字段详细资料

HBASE_GROUP_LOADBALANCER_CLASS

public static final String HBASE_GROUP_LOADBALANCER_CLASS

Config for pluggable load balancers

另请参阅:

常量字段值

构造器详细资料

RSGroupBasedLoadBalancer

@InterfaceAudience.Private
public RSGroupBasedLoadBalancer()

RSGroupBasedLoadBalancer

@InterfaceAudience.Private
public RSGroupBasedLoadBalancer(RSGroupInfoManager RSGroupInfoManager)

方法详细资料

getConf

public org.apache.hadoop.conf.Configuration getConf()

指定者:

getConf 在接口中 org.apache.hadoop.conf.Configurable

setConf

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

指定者:

setConf 在接口中 org.apache.hadoop.conf.Configurable

setClusterStatus

public void setClusterStatus(ClusterStatus st)

指定者:

setClusterStatus 在接口中 LoadBalancer

setMasterServices

public void setMasterServices(MasterServices masterServices)

指定者:

setMasterServices 在接口中 LoadBalancer

balanceCluster

public List<RegionPlan> balanceCluster(TableName tableName,
                              Map<ServerName,List<HRegionInfo>> clusterState)
                                throws HBaseIOException

指定者:

balanceCluster 在接口中 LoadBalancer

抛出:

HBaseIOException

balanceCluster

public List<RegionPlan> balanceCluster(Map<ServerName,List<HRegionInfo>> clusterState)
                                throws HBaseIOException

指定者:

balanceCluster 在接口中 LoadBalancer

抛出:

HBaseIOException

roundRobinAssignment

public Map<ServerName,List<HRegionInfo>> roundRobinAssignment(List<HRegionInfo> regions,
                                                     List<ServerName> servers)
                                                       throws HBaseIOException

指定者:

roundRobinAssignment 在接口中 LoadBalancer

抛出:

HBaseIOException

retainAssignment

public Map<ServerName,List<HRegionInfo>> retainAssignment(Map<HRegionInfo,ServerName> regions,
                                                 List<ServerName> servers)
                                                   throws HBaseIOException

指定者:

retainAssignment 在接口中 LoadBalancer

抛出:

HBaseIOException

immediateAssignment

public Map<HRegionInfo,ServerName> immediateAssignment(List<HRegionInfo> regions,
                                              List<ServerName> servers)
                                                throws HBaseIOException

指定者:

immediateAssignment 在接口中 LoadBalancer

抛出:

HBaseIOException

randomAssignment

public ServerName randomAssignment(HRegionInfo region,
                          List<ServerName> servers)
                            throws HBaseIOException

指定者:

randomAssignment 在接口中 LoadBalancer

抛出:

HBaseIOException

getMisplacedRegions

public Set<HRegionInfo> getMisplacedRegions(Map<HRegionInfo,ServerName> regions)
                                     throws IOException

抛出:

IOException

initialize

public void initialize()
                throws HBaseIOException

指定者:

initialize 在接口中 LoadBalancer

抛出:

HBaseIOException

isOnline

public boolean isOnline()

regionOnline

public void regionOnline(HRegionInfo regionInfo,
                ServerName sn)

指定者:

regionOnline 在接口中 LoadBalancer

regionOffline

public void regionOffline(HRegionInfo regionInfo)

指定者:

regionOffline 在接口中 LoadBalancer

onConfigurationChange

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

指定者:

onConfigurationChange 在接口中 ConfigurationObserver

指定者:

onConfigurationChange 在接口中 LoadBalancer

stop

public void stop(String why)

指定者:

stop 在接口中 Stoppable

isStopped

public boolean isStopped()

指定者:

isStopped 在接口中 Stoppable

postMasterStartupInitialize

public void postMasterStartupInitialize()

指定者:

postMasterStartupInitialize 在接口中 LoadBalancer

updateBalancerStatus

public void updateBalancerStatus(boolean status)

指定者:

updateBalancerStatus 在接口中 LoadBalancer