SimpleTotalOrderPartitioner (Apache HBase 1.1.7 API)

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java.lang.Object
- org.apache.hadoop.mapreduce.Partitioner<ImmutableBytesWritable,VALUE>
- - org.apache.hadoop.hbase.mapreduce.SimpleTotalOrderPartitioner<VALUE>

Type Parameters:
VALUE -

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable
```
@InterfaceAudience.Public
@InterfaceStability.Stable
public class SimpleTotalOrderPartitioner<VALUE>
extends org.apache.hadoop.mapreduce.Partitioner<ImmutableBytesWritable,VALUE>
implements org.apache.hadoop.conf.Configurable
```
A partitioner that takes start and end keys and uses bigdecimal to figure which reduce a key belongs to. Pass the start and end keys in the Configuration using hbase.simpletotalorder.start and hbase.simpletotalorder.end. The end key needs to be exclusive; i.e. one larger than the biggest key in your key space. You may be surprised at how this class partitions the space; it may not align with preconceptions; e.g. a start key of zero and an end key of 100 divided in ten will not make regions whose range is 0-10, 10-20, and so on. Make your own partitioner if you need the region spacing to come out a particular way.

See Also:
START, END

Field Summary

Fields
Modifier and Type Field and Description

static String END
Deprecated.

static String START
Deprecated.

Constructor Summary

Constructors
Constructor and Description

SimpleTotalOrderPartitioner()

Method Summary

Methods
Modifier and Type	Method and Description
`org.apache.hadoop.conf.Configuration`	`getConf()`
`int`	`getPartition(ImmutableBytesWritable key, VALUE value, int reduces)`
`void`	`setConf(org.apache.hadoop.conf.Configuration conf)`
`static void`	`setEndKey(org.apache.hadoop.conf.Configuration conf, byte[] endKey)`
`static void`	`setStartKey(org.apache.hadoop.conf.Configuration conf, byte[] startKey)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- START
```
@Deprecated
public static final String START
```
  Deprecated.
  
  See Also:
  Constant Field Values
- END
```
@Deprecated
public static final String END
```
  Deprecated.
  
  See Also:
  Constant Field Values

Constructor Detail
- SimpleTotalOrderPartitioner
```
public SimpleTotalOrderPartitioner()
```

Method Detail

setStartKey

public static void setStartKey(org.apache.hadoop.conf.Configuration conf,
               byte[] startKey)

setEndKey

public static void setEndKey(org.apache.hadoop.conf.Configuration conf,
             byte[] endKey)

getPartition

public int getPartition(ImmutableBytesWritable key,
               VALUE value,
               int reduces)

Specified by:: getPartition in class org.apache.hadoop.mapreduce.Partitioner<ImmutableBytesWritable,VALUE>

getConf
```
public org.apache.hadoop.conf.Configuration getConf()
```
Specified by:

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

setConf
```
public void setConf(org.apache.hadoop.conf.Configuration conf)
```
Specified by:

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

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