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courses:mapreduce-tutorial:step-5 [2012/01/24 19:04]
straka vytvořeno 		courses:mapreduce-tutorial:step-5 [2012/01/24 22:08]
straka
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-====== MapReduce Tutorial : ======+====== MapReduce Tutorial : Basic reducer ====== 
 + 
 +<file perl reducer.pl> 
 +#!/usr/bin/perl 
 +  
 +package Mapper; 
 +use Moose; 
 +with 'Hadoop::Mapper'; 
 +  
 +sub map { 
 +  my ($self, $key, $value, $context) = @_; 
 +  
 +  $context->write($key, $value); 
 +} 
 +  
 +package Main; 
 +use Hadoop::Runner; 
 +  
 +my $runner = Hadoop::Runner->new( 
 +  mapper => Mapper->new(), 
 +  input_format => 'TextInputFormat', 
 +  output_format => 'TextOutputFormat', 
 +  output_compression => 0); 
 +  
 +$runner->run(); 
 +</file> 

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