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The following page has been changed by AndrewHitchcock: http://wiki.apache.org/hadoop/HadoopStreaming The comment on the change is: fixed spelling error ------------------------------------------------------------------------------ * '''Use shell scripts rather than commands''' - The "-file shellMapper.sh" part isn't entirely necessary. You can simply use a clause like "-mapper 'sed | grep | awk'" or some such but complicated quoting is can introduce bugs. Wrapping the job in a shell script eliminates some of these issues. - * '''Don't expect shebangs to work''' - If you're going to run other scripts from inside your shell script, don't execpt a line like #!/bin/python to work. To be certain that things will work, run the script directly like "grep somethingInteresting | '''''perl''' perlScript'' | sort | uniq -c" + * '''Don't expect shebangs to work''' - If you're going to run other scripts from inside your shell script, don't expect a line like #!/bin/python to work. To be certain that things will work, run the script directly like "grep somethingInteresting | '''''perl''' perlScript'' | sort | uniq -c" == See Also == * HowToDebugMapReducePrograms
