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Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
courses:mapreduce-tutorial:step-3 [2012/01/30 00:37] straka Improving package names of Perl programs. |
courses:mapreduce-tutorial:step-3 [2012/01/31 09:40] straka Change Perl commandline syntax. |
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Resulting script can be executed locally in a single thread using | Resulting script can be executed locally in a single thread using | ||
- | perl script.pl | + | perl script.pl |
- | All files in input_directory | + | Input can be either file or a directory -- in that case, all files in this directory |
+ | === 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 ===== |