org.apache.hadoop.hbase.regionserver

Class DelimitedKeyPrefixRegionSplitPolicy

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hbase.regionserver.RegionSplitPolicy

org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy

org.apache.hadoop.hbase.regionserver.IncreasingToUpperBoundRegionSplitPolicy

org.apache.hadoop.hbase.regionserver.DelimitedKeyPrefixRegionSplitPolicy

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

Deprecated.

since 2.5.0 and will be removed in 4.0.0. Use RegionSplitRestriction, instead.

@Deprecated
 @InterfaceAudience.Private
public class DelimitedKeyPrefixRegionSplitPolicy
extends IncreasingToUpperBoundRegionSplitPolicy

A custom RegionSplitPolicy implementing a SplitPolicy that groups rows by a prefix of the row-key with a delimiter. Only the first delimiter for the row key will define the prefix of the row key that is used for grouping. This ensures that a region is not split "inside" a prefix of a row key. I.e. rows can be co-located in a region by their prefix. As an example, if you have row keys delimited with _, like userid_eventtype_eventid, and use prefix delimiter _, this split policy ensures that all rows starting with the same userid, belongs to the same region.

See Also:

KeyPrefixRegionSplitPolicy

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	delimiter Deprecated.
static String	DELIMITER_KEY Deprecated.
private static org.slf4j.Logger	LOG Deprecated.

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

initialSize

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

overallHRegionFiles

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

region

Constructor Summary

Constructors

Constructor and Description
DelimitedKeyPrefixRegionSplitPolicy() Deprecated.

Method Summary

Modifier and Type	Method and Description
protected void	configureForRegion(HRegion region) Deprecated. Upon construction, this method will be called with the region to be governed.
protected byte[]	getSplitPoint() Deprecated.
String	toString() Deprecated.

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

getSizeToCheck, shouldSplit

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

getDesiredMaxFileSize, isExceedSize, positiveJitterRate

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

canSplit, create, 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, wait, wait, wait

Field Detail

LOG

private static final org.slf4j.Logger LOG

Deprecated.

DELIMITER_KEY

public static final String DELIMITER_KEY

Deprecated.

See Also:

Constant Field Values

delimiter

private byte[] delimiter

Deprecated.

Constructor Detail

DelimitedKeyPrefixRegionSplitPolicy

public DelimitedKeyPrefixRegionSplitPolicy()

Deprecated.

Method Detail

toString

public String toString()

Deprecated.

Overrides:

toString in class IncreasingToUpperBoundRegionSplitPolicy

configureForRegion

protected void configureForRegion(HRegion region)

Deprecated.

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 IncreasingToUpperBoundRegionSplitPolicy

getSplitPoint

protected byte[] getSplitPoint()

Deprecated.

Overrides:

getSplitPoint in class RegionSplitPolicy

Returns:

the key at which the region should be split, or null if it cannot be split. This will only be called if shouldSplit previously returned true.