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courses:mapreduce-tutorial:step-4 [2012/01/25 21:52] straka |
courses:mapreduce-tutorial:step-4 [2012/01/29 23:24] majlis |
===== Exercise ===== | ===== Exercise ===== |
| |
Run a Hadoop job on ''/home/straka/wiki/cs-text'', 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-* |
| |
{{.:step-4-solution.txt|Solution.pl}} | ==== 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> |