Source

DocIRHadoop / How To.rst

Christos Kannas 9c2dbd3 


























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How To:
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Prerequisites
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Pyparsing (http://pyparsing.wikispaces.com/):
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- First install setuptools for Python to get easy_install: **sudo apt-get install python-setuptools**
- Then install pyparsing: **easy_install pyparsing**

Execute
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- Unzip the source code in a directory of your choice.
- Make sure that all mapper and reducer scripts located in DocIRHadoop/InvertIndex have permission for execution.
- Open a terminal.
- Export the path to the DocIrHadoop directory in PYTHONPATH environment variable: **export PYTHONPATH=/path/to/parent/of/DocIRHadoop:$PYTHONPATH**
- Go to parent of DocIRHadoop directory.
- In a second terminal go to Hadoop directory and start Hadoop (**bin/start-all.sh**).
- In the first terminal type: **python DocIRHadoop/run.py**
- At the first promt enter the full path of the location of the english-documents directory. Press Enter.
- Enter the name of the destination directory in HDFS. Press Enter.
- At this time you will see a lot of information of the execution of DocIRHadoop, especially for the MapReduce jobs.
- When the jobs for inverted indexing finish you will access the Search section.
- Here you type your queries, you see the job execution info.
- And then you get the result of the query.
- To Exit press Ctrl+D.