类 org.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase
的使用

使用ValueAggregatorJobBase的程序包

程序包	说明
org.apache.hadoop.mapred.lib.aggregate	Classes for performing various counting and aggregations.

org.apache.hadoop.mapred.lib.aggregate中ValueAggregatorJobBase的使用

org.apache.hadoop.mapred.lib.aggregate中ValueAggregatorJobBase的子类

限定符和类型	类和说明
class	ValueAggregatorCombiner<K1 extends WritableComparable,V1 extends Writable> This class implements the generic combiner of Aggregate.
class	ValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable> This class implements the generic mapper of Aggregate.
class	ValueAggregatorReducer<K1 extends WritableComparable,V1 extends Writable> This class implements the generic reducer of Aggregate.