| WordCount hadoop example: Inserts a bunch of words across multiple rows, |
| and counts them, with RandomPartitioner. The word_count_counters example sums |
| the value of counter columns for a key. |
| |
| The scripts in bin/ assume you are running with cwd of contrib/word_count. |
| |
| First build and start a Cassandra server with the default configuration*, |
| then run |
| |
| contrib/word_count$ ant |
| contrib/word_count$ bin/word_count_setup |
| contrib/word_count$ bin/word_count |
| contrib/word_count$ bin/word_count_counters |
| |
| In order to view the results in Cassandra, one can use bin/cassandra-cli and |
| perform the following operations: |
| $ bin/cassandra-cli |
| > connect localhost/9160; |
| > use wordcount; |
| > list output_words; |
| |
| The output of the word count can now be configured. In the bin/word_count |
| file, you can specify the OUTPUT_REDUCER. The two options are 'filesystem' |
| and 'cassandra'. The filesystem option outputs to the /tmp/word_count* |
| directories. The cassandra option outputs to the 'output_words' column family |
| in the 'wordcount' keyspace. 'cassandra' is the default. |
| |
| Read the code in src/ for more details. |
| |
| The word_count_counters example sums the counter columns for a row. The output |
| is written to a text file in /tmp/word_count_counters. |
| |
| *If you want to point wordcount at a real cluster, modify the seed |
| and listenaddress settings accordingly. |
