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Hola Hadoop

Hola Hadoop. 0. Clean-Up The Hard-disks. Delete tmp / folder from workspace/mdp-lab3 Delete unneeded downloads. 0. Peligro !.

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Hola Hadoop

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  1. Hola Hadoop

  2. 0. Clean-Up The Hard-disks • Delete tmp/ folder from workspace/mdp-lab3 • Delete unneeded downloads

  3. 0. Peligro! Please pleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleaseplease please pleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleaseplease

  4. 0. Peligro! … please pleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleaseplease please pleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleasepleaseplease

  5. Peligro! … please

  6. Peligro! … please be careful of what you are doing! • Think twice before: rm mv cp kill emacs/vim/… configuration files

  7. Peligro! … please.

  8. cluster.dcc.uchile.cl

  9. 1. Download tools • http://aidanhogan.com/teaching/cc5212-1/tools/ • Unzip them somewhere you can find them

  10. 2. Log-in PuTTy 1 2 3

  11. 3. Open DFS Browser http://cluster.dcc.uchile.cl:50070/

  12. 3. PuTTy: Upload data to HDFS • hadoop fs -ls / • hadoop fs -ls /uhadoop • hadoop fs -mkdir /uhadoop/[username] • [username] = first letter first name, last name (e.g., “ahogan”) • cd /data/hadoop/hadoop/data/ • hadoop fs -copyFromLocal /data/hadoop/hadoop/data/es-abstracts.txt /uhadoop/[username]/es-abstracts.txt

  13. Note on namespace • If you need to disambiguate local/remote files • HDFS file • hdfs://cm:9000/uhadoop/… • Local file • file:///data/hadoop/...

  14. 4. Let’s Build Our First MapReduce Job • Hint: Use Monday’s slides for “inspiration” • http://aidanhogan.com/teaching/cc5212-1/ • Implement map(.,.,.,.) method • Implement reduce(.,.,.,.) method • Implement main(.) method

  15. 5. Eclipse: Build jar Right Click build.xml > dist (Might need to make a dist folder)

  16. 6. WinSCP: Copy .jar to Master Server 1 2 3 Don’t save password! 4

  17. 6. WinSCP: Copy .jar to Master Server

  18. 6. WinSCP: Copy .jar to Master Server • Create dir: /data/2014/uhadoop/[username]/ • Copy your mdp-lab4.jar into it

  19. 7. Putty: Run Job • hadoop jar /data/2014/uhadoop/[username]/mdp-lab4.jar WordCount /uhadoop/[username]/es-abstracts.txt /uhadoop/[username]/wc/ All one command!

  20. 8. Look at output • hadoop fs -ls /uhadoop/[username]/wc/ • hadoop fs -cat /uhadoop/[username]/wc/part-00000 | more • hadoop fs -cat /uhadoop/[username]/wc/part-00000 | grep -e "^de" | more All one command! Look for “de” … 4575144 occurrences in local run

  21. 9. Look at output through browser http://cluster.dcc.uchile.cl:50070/

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