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courses:mapreduce-tutorial:step-3 [2012/01/30 00:37] straka Improving package names of Perl programs. |
courses:mapreduce-tutorial:step-3 [2012/01/30 13:51] straka |
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| All files in input_directory are processes. The output_directory must not exist. | All files in input_directory are processes. The output_directory must not exist. | ||
| + | === Standard input and output === | ||
| + | Standard input and standard output of the Perl script are used to communicate with the Hadoop framework. Therefore you should use standard error output if you want to print some debugging output using '' | ||
| ===== Exercise ===== | ===== Exercise ===== | ||