org.apache.hadoop.examples.terasort

类 TeraValidate

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.examples.terasort.TeraValidate

所有已实现的接口:

Configurable, Tool

public class TeraValidate
extends Configured
implements Tool

Generate 1 mapper per a file that checks to make sure the keys are sorted within each file. The mapper also generates "$file:begin", first key and "$file:end", last key. The reduce verifies that all of the start/end items are in order. Any output from the reduce is problem report.

To run the program: bin/hadoop jar hadoop-examples-*.jar teravalidate out-dir report-dir

If there is any output, something is wrong and the output of the reduce will have the problem report.

构造器概要

构造器

构造器和说明
TeraValidate()

方法概要

方法

限定符和类型	方法和说明
static void	main(String[] args)
int	run(String[] args) Execute the command with the given arguments.

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.conf.Configurable

getConf, setConf

构造器详细资料

TeraValidate

public TeraValidate()

方法详细资料

run

public int run(String[] args)
        throws Exception

从接口复制的说明: Tool

Execute the command with the given arguments.

指定者:

run 在接口中 Tool

参数:

args - command specific arguments.

返回:

exit code.

抛出:

Exception

main

public static void main(String[] args)
                 throws Exception

参数:

args -

抛出:

Exception