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Essentials of MapReduce
Mastering Hadoop Map-reduce for Data Analysis
Shashank Tiwari
blog: shanky.org | twitter: @tshanky
st@treasuryofideas.com

2. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Understanding Map Reduce

3. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Understanding Map Reduce

4. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Understanding Map Reduce

5. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Understanding Map Reduce

6. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Understanding Map Reduce

7. Confidential, for personal use only. All original content copyright owned by Treasury of Ideas LLC.
Copyright for all other & referenced work is retained by their respective owners.
Walk Through a Map Reduce Example
• A mapper class that emits key/value pairs.
• A reducer class that takes the values emitted from mapper and manipulates it
to create aggregations. In the data upload example, the mapper only inserts
the data into an HBase table.
• A driver class that puts the mapper class and the reducer class together.
• A class that triggers the job in its main method
• NYSE HLOC Data Hadoop MapReduce

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Copyright for all other & referenced work is retained by their respective owners.
Questions?
• blog: shanky.org | twitter: @tshanky
• st@treasuryofideas.com