ConstantSizeRegionSplitPolicy (Apache HBase 1.2.12 API)

All Classes

Summary:
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Constr |
Method

Detail:
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Constr |
Method

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 Random RANDOM
- Fields inherited from class org.apache.hadoop.hbase.regionserver.RegionSplitPolicy
  region

Constructor Summary

Constructors
Constructor and Description

ConstantSizeRegionSplitPolicy()

Method Summary

Methods
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()`
`boolean`	`positiveJitterRate()`
`protected boolean`	`shouldSplit()`

Methods inherited from class org.apache.hadoop.hbase.regionserver.RegionSplitPolicy
create, getSplitPoint, getSplitPolicyClass, skipStoreFileRangeCheck, 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
  - RANDOM
```
private static final Random RANDOM
```
  - desiredMaxFileSize
```
private long desiredMaxFileSize
```
  - jitterRate
```
private double jitterRate
```
- 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
```
public boolean positiveJitterRate()
```

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