Hello, I was trying to execute the recommendation using movie lens data ( http://www.grouplens.org/node/73). The mahout code is running fine but the output files are being generated in LZ4 format. Does any one know how to uncompress this type of file in linux?
Cloudera version: cdh4.2 Linux version: Linux 2.6.18-348.6.1.el5 (red hat) Hadoop version: 2.0.0 Mahout Version: 0.7 Code used: /usr/bin/mahout recommenditembased --input mahout_recommender/ratings.csv --output mahout_recommender/output_data --tempDir mahout_recommender/tmp --usersFile mahout_recommender/users.txt --similarityClassname SIMILARITY_COOCCURRENCE Output files generated: [root@INFADDAD19 ~]# hdfs dfs -ls mahout_recommender/output_data Found 32 items -rw-r--r-- 3 root supergroup 0 2013-07-04 05:39 mahout_recommender/output_data/_SUCCESS drwxr-xr-x - root supergroup 0 2013-07-04 05:38 mahout_recommender/output_data/_logs -rw-r--r-- 3 root supergroup 9302 2013-07-04 05:38 mahout_recommender/output_data/*part-r-00000.lz4* -rw-r--r-- 3 root supergroup 8885 2013-07-04 05:38 mahout_recommender/output_data/*part-r-00001.lz4* -rw-r--r-- 3 root supergroup 10033 2013-07-04 05:38 mahout_recommender/output_data/*part-r-00002.lz4* It is generating around 29 LZ4 files but i am specifying only 3 here. Thank you. Regards, Sugato
