Package org.apache.hadoop.hbase.master.balancer.replicas

Class ReplicaKeyCache

java.lang.Object

org.apache.hadoop.hbase.master.balancer.replicas.ReplicaKeyCache

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

@Private
public final class ReplicaKeyCache
extends Object
implements org.apache.hadoop.conf.Configurable

Field Summary

Fields

Modifier and Type	Field	Description
static final boolean	CACHE_REPLICA_KEYS_DEFAULT
static final String	CACHE_REPLICA_KEYS_KEY	ReplicaKey creation is expensive if you have lots of regions.
private org.apache.hadoop.conf.Configuration	conf
private static final Supplier<ReplicaKeyCache>	INSTANCE
static final int	REPLICA_KEY_CACHE_SIZE_DEFAULT
static final String	REPLICA_KEY_CACHE_SIZE_KEY	If memory is available, then set this to a value greater than your region count to maximize replica distribution performance.
private org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<RegionInfo,ReplicaKey>	replicaKeyCache

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ReplicaKeyCache()

Method Summary

Modifier and Type	Method	Description
org.apache.hadoop.conf.Configuration	getConf()
static ReplicaKeyCache	getInstance()
ReplicaKey	getReplicaKey(RegionInfo regionInfo)
void	setConf(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

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

Field Details

CACHE_REPLICA_KEYS_KEY

public static final String CACHE_REPLICA_KEYS_KEY

ReplicaKey creation is expensive if you have lots of regions. If your HMaster has adequate memory, and you would like balancing to be faster, then you can turn on this flag to cache ReplicaKey objects.

See Also:

• Constant Field Values

CACHE_REPLICA_KEYS_DEFAULT

public static final boolean CACHE_REPLICA_KEYS_DEFAULT

See Also:

• Constant Field Values

REPLICA_KEY_CACHE_SIZE_KEY

public static final String REPLICA_KEY_CACHE_SIZE_KEY

If memory is available, then set this to a value greater than your region count to maximize replica distribution performance.

See Also:

• Constant Field Values

REPLICA_KEY_CACHE_SIZE_DEFAULT

public static final int REPLICA_KEY_CACHE_SIZE_DEFAULT

See Also:

• Constant Field Values

INSTANCE

private static final Supplier<ReplicaKeyCache> INSTANCE

replicaKeyCache

private volatile org.apache.hbase.thirdparty.com.google.common.cache.LoadingCache<RegionInfo,ReplicaKey> replicaKeyCache

conf

private org.apache.hadoop.conf.Configuration conf

Constructor Details

ReplicaKeyCache

private ReplicaKeyCache()

Method Details

getInstance

public static ReplicaKeyCache getInstance()

getReplicaKey

public ReplicaKey getReplicaKey(RegionInfo regionInfo)

setConf

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

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

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

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable