Package org.apache.hadoop.hbase.mapreduce

Class KeyValueSortReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<ImmutableBytesWritable,KeyValue,ImmutableBytesWritable,KeyValue>

org.apache.hadoop.hbase.mapreduce.KeyValueSortReducer

@Deprecated
@Public
public class KeyValueSortReducer
extends org.apache.hadoop.mapreduce.Reducer<ImmutableBytesWritable,KeyValue,ImmutableBytesWritable,KeyValue>

Deprecated.

Use CellSortReducer. Will be removed from 3.0 onwards

Emits sorted KeyValues. Reads in all KeyValues from passed Iterator, sorts them, then emits KeyValues in sorted order. If lots of columns per row, it will use lots of memory sorting.

See Also:

• HFileOutputFormat2

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor	Description
KeyValueSortReducer()	Deprecated.

Method Summary

Modifier and Type	Method	Description
protected void	reduce(ImmutableBytesWritable row, Iterable<KeyValue> kvs, org.apache.hadoop.mapreduce.Reducer<ImmutableBytesWritable,KeyValue,ImmutableBytesWritable,KeyValue>.org.apache.hadoop.mapreduce.Reducer.Context context)	Deprecated.

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run, setup

Methods inherited from class java.lang.Object

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

Constructor Details

KeyValueSortReducer

public KeyValueSortReducer()

Deprecated.

Method Details

reduce

protected void reduce(ImmutableBytesWritable row,
 Iterable<KeyValue> kvs,
 org.apache.hadoop.mapreduce.Reducer<ImmutableBytesWritable,KeyValue,ImmutableBytesWritable,KeyValue>.org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
InterruptedException

Deprecated.

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<ImmutableBytesWritable,KeyValue,ImmutableBytesWritable,KeyValue>

Throws:

IOException

InterruptedException