接口 org.apache.hadoop.mapred.MapRunnable
的使用

使用MapRunnable的程序包

程序包	说明
org.apache.hadoop.mapred	A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapred.lib	Library of generally useful mappers, reducers, and partitioners.
org.apache.hadoop.streaming	Hadoop Streaming is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g.

org.apache.hadoop.mapred中MapRunnable的使用

实现MapRunnable的org.apache.hadoop.mapred中的类

限定符和类型	类和说明
class	MapRunner<K1,V1,K2,V2> Default MapRunnable implementation.

返回变量类型为MapRunnable的类型的org.apache.hadoop.mapred中的方法

限定符和类型	方法和说明
Class<? extends MapRunnable>	JobConf.getMapRunnerClass() Get the MapRunnable class for the job.

类型变量类型为MapRunnable的org.apache.hadoop.mapred中的方法参数

限定符和类型	方法和说明
void	JobConf.setMapRunnerClass(Class<? extends MapRunnable> theClass) Expert: Set the MapRunnable class for the job.

org.apache.hadoop.mapred.lib中MapRunnable的使用

实现MapRunnable的org.apache.hadoop.mapred.lib中的类

限定符和类型	类和说明
class	MultithreadedMapRunner<K1,V1,K2,V2> Multithreaded implementation for @link org.apache.hadoop.mapred.MapRunnable.

org.apache.hadoop.streaming中MapRunnable的使用

实现MapRunnable的org.apache.hadoop.streaming中的类

限定符和类型	类和说明
class	PipeMapRunner<K1,V1,K2,V2>