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courses:mapreduce-tutorial:step-4 [2012/01/28 11:49]
majlis Odstranen odkaz
courses:mapreduce-tutorial:step-4 [2012/01/29 23:24]
majlis
Line 17: Line 17:
 ===== Exercise ===== ===== Exercise =====
  
-Run a Hadoop job on ''/home/straka/wiki/cs-text-medium'', which uses counters to count the number of articles according to their first letter (ignoring the case and possible diacritics).+Run a Hadoop job on ''/home/straka/wiki/cs-text-medium'', which uses counters to count the number of articles according to their first letter (ignoring the case). You can download the template {{:courses:mapreduce-tutorial:step-4-exercise.txt|step-4-exercise.pl}}  and execute it. 
 +  wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-4-exercise.txt' -O 'step-4-exercise.pl' 
 +  rm -rf step-4-out-ex; perl step-4-exercise.pl run /home/straka/wiki/cs-text-medium/ step-4-out-ex 
 +  less step-4-out-ex/part-*
  
 +==== Solution ====
 +You can also download the solution {{:courses:mapreduce-tutorial:step-4-solution.txt|step-4-solution.pl}} and check the correct output.
 +  wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_media/courses:mapreduce-tutorial:step-4-solution.txt' -O 'step-4-solution.pl'
 +  rm -rf step-4-out-sol; perl step-4-solution.pl run /home/straka/wiki/cs-text-medium/ step-4-out-sol
 +  less step-4-out-sol/part-*
 +
 +----
 +
 +<html>
 +<table style="width:100%">
 +<tr>
 +<td style="text-align:left; width: 33%; "></html>[[step-3|Step 3]]: Basic mapper.<html></td>
 +<td style="text-align:center; width: 33%; "></html>[[.|Overview]]<html></td>
 +<td style="text-align:right; width: 33%; "></html>[[step-5|Step 5]]: Basic reducer.<html></td>
 +</tr>
 +</table>
 +</html>

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