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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
courses:mapreduce-tutorial:step-7 [2012/01/29 20:52] straka |
courses:mapreduce-tutorial:step-7 [2012/01/29 23:52] majlis |
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wget --no-check-certificate ' | wget --no-check-certificate ' | ||
/ | / | ||
+ | # NOW VIEW THE FILE | ||
+ | # $EDITOR step-7-wordcount.pl | ||
rm -rf step-7-out-sol; | rm -rf step-7-out-sol; | ||
less less step-7-out-sol/ | less less step-7-out-sol/ | ||
Remarks: | Remarks: | ||
* The reducers seem to start running before the mappers finish. In the web interface, the running time of reducers is divided into thirds: | * The reducers seem to start running before the mappers finish. In the web interface, the running time of reducers is divided into thirds: | ||
- | * during the first 33%, the mapper outputs are copied to the machine where reducer runs | + | * during the first 33%, the mapper outputs are copied to the machine where reducer runs. |
- | * during the second 33%, the (key, value) pairs are sorted | + | * during the second 33%, the (key, value) pairs are sorted. |
- | * during the last 33%, the user-defined reducer runs | + | * during the last 33%, the user-defined reducer runs. |
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