org.apache.hadoop.hbase.regionserver

Class ConstantSizeRegionSplitPolicy

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.regionserver.RegionSplitPolicy

org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

Direct Known Subclasses:

IncreasingToUpperBoundRegionSplitPolicy

@InterfaceAudience.LimitedPrivate(value="Configuration")
public class ConstantSizeRegionSplitPolicy
extends RegionSplitPolicy

A RegionSplitPolicy implementation which splits a region as soon as any of its store files exceeds a maximum configurable size.

This is the default split policy. From 0.94.0 on the default split policy has changed to IncreasingToUpperBoundRegionSplitPolicy

Field Summary

Fields

Modifier and Type	Field and Description
private long	desiredMaxFileSize
private double	jitterRate
private static org.slf4j.Logger	LOG
protected boolean	overallHRegionFiles
private static Random	RANDOM

Fields inherited from class org.apache.hadoop.hbase.regionserver.RegionSplitPolicy

region

Constructor Summary

Constructors

Constructor and Description
ConstantSizeRegionSplitPolicy()

Method Summary

Modifier and Type	Method and Description
protected void	configureForRegion(HRegion region) Upon construction, this method will be called with the region to be governed.
(package private) long	getDesiredMaxFileSize()
protected boolean	isExceedSize(long sizeToCheck)
boolean	positiveJitterRate()
protected boolean	shouldSplit()

Methods inherited from class org.apache.hadoop.hbase.regionserver.RegionSplitPolicy

canSplit, create, getSplitPoint, getSplitPolicyClass, skipStoreFileRangeCheck

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

RANDOM

private static final Random RANDOM

desiredMaxFileSize

private long desiredMaxFileSize

jitterRate

private double jitterRate

overallHRegionFiles

protected boolean overallHRegionFiles

Constructor Detail

ConstantSizeRegionSplitPolicy

public ConstantSizeRegionSplitPolicy()

Method Detail

configureForRegion

protected void configureForRegion(HRegion region)

Description copied from class: RegionSplitPolicy

Upon construction, this method will be called with the region to be governed. It will be called once and only once.

Overrides:

configureForRegion in class RegionSplitPolicy

shouldSplit

protected boolean shouldSplit()

Specified by:

shouldSplit in class RegionSplitPolicy

Returns:

true if the specified region should be split.

getDesiredMaxFileSize

long getDesiredMaxFileSize()

positiveJitterRate

@InterfaceAudience.Private
public boolean positiveJitterRate()

isExceedSize

protected final boolean isExceedSize(long sizeToCheck)

Returns:

true if region size exceed the sizeToCheck