| 69 | | {{{ |
| 70 | | ~/hadoop-0.18.2$ bin/hadoop jar /home/jazz/hadoop-0.18.2/hadoop-0.18.2-examples.jar wordcount |
| 71 | | ERROR: Wrong number of parameters: 0 instead of 2. |
| 72 | | wordcount [-m <maps>] [-r <reduces>] <input> <output> |
| 73 | | Generic options supported are |
| 74 | | -conf <configuration file> specify an application configuration file |
| 75 | | -D <property=value> use value for given property |
| 76 | | -fs <local|namenode:port> specify a namenode |
| 77 | | -jt <local|jobtracker:port> specify a job tracker |
| 78 | | -files <comma separated list of files> specify comma separated files to be copied to the map reduce cluster |
| 79 | | -libjars <comma separated list of jars> specify comma separated jar files to include in the classpath. |
| 80 | | -archives <comma separated list of archives> specify comma separated archives to be unarchived on the compute machines. |
| 81 | | |
| 82 | | The general command line syntax is |
| 83 | | bin/hadoop command [genericOptions] [commandOptions] |
| 84 | | }}} |
| 85 | | * Wordcount 的原始碼 |
| 86 | | {{{ |
| 87 | | jazz@drbl:~/hadoop-0.18.2/src$ vi examples/org/apache/hadoop/examples/WordCount.java |
| 88 | | }}} |
