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courses:mapreduce-tutorial:step-11 [2012/01/28 23:04]
majlis Added links to previous and next chapter. 		courses:mapreduce-tutorial:step-11 [2012/01/30 16:45]
dusek
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   wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-5-solution1.txt' -O 'step-11-wc-without-combiner.pl'   wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-5-solution1.txt' -O 'step-11-wc-without-combiner.pl'
 +  # NOW EDIT THE FILE
 +  # $EDITOR step-11-exercise.pl
   rm -rf step-11-out-wout; time perl step-11-wc-without-combiner.pl run /home/straka/wiki/cs-text-medium/ step-11-out-wout   rm -rf step-11-out-wout; time perl step-11-wc-without-combiner.pl run /home/straka/wiki/cs-text-medium/ step-11-out-wout
   less step-11-out-wout/part-*   less step-11-out-wout/part-*
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   wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-11-solution.txt' -O 'step-11-wc-with-perl-hash.pl'   wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-11-solution.txt' -O 'step-11-wc-with-perl-hash.pl'
 +  # NOW VIEW THE FILE
 +  # $EDITOR step-11-solution.pl
   rm -rf step-11-out-with-hash; time perl step-11-wc-with-perl-hash.pl run /home/straka/wiki/cs-text-medium/ step-11-out-with-hash   rm -rf step-11-out-with-hash; time perl step-11-wc-with-perl-hash.pl run /home/straka/wiki/cs-text-medium/ step-11-out-with-hash
   less step-11-out-with-hash/part-*   less step-11-out-with-hash/part-*
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 | Wordcount with combiner | 1min, 51sec | 51MB | | Wordcount with combiner | 1min, 51sec | 51MB |
 | Wordcount with hash in mapper | 1min, 14sec | 51MB | | Wordcount with hash in mapper | 1min, 14sec | 51MB |
-Using the combiner is beneficial, although manually combining the word occurrences in mapper manually is still faster.+Using the combiner is beneficial, although combining the word occurrences in mapper manually is still faster.
  
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