bin/hadoop job -set-reduce-capacity job_20151126032920_1142443 1000 調成map數 bin/hadoop job -set-priority job_20151126032920_1160549 VERY_HIGH 調整優先級 bin/hadoop job -set-map-capacity job_20151126032920_1142443 1000



--------------------------------------：$ bin/hadoop job???????????????????????????????????????????????? ?
Usage: JobClient <command> <args>
??????? [-submit <job-file>]
??????? [-status <job-id>]
??????? [-info <job-id>]
??????? [-counter <job-id> <group-name> <counter-name>]
??????? [-kill <job-id>]
??????? [-abort <job-id>]
??????? [-suspend <job-id> [hours]]
??????? [-recover <job-id> [-force] [-jobconf name=value] [-file local-path] [-cacheArchive] [-cacheFile]]
??????? [-set-priority <job-id> <priority>]. Valid values for priorities are: VERY_HIGH HIGH NORMAL LOW VERY_LOW
??????? [-set-map-capacity <job-id> <map-capacity> [ <vertex-id> ] ]
??????? [-set-reduce-capacity <job-id> <reduce-capacity> [ <vertex-id> ] ]
??????? [-set-map-over-capacity <job-id> <true/false> [ <vertex-id> ] ]
??????? [-set-reduce-over-capacity <job-id> <true/false> [ <vertex-id> ] ]
??????? [-events <job-id> <from-event-#> <#-of-events>]
??????? [-history <jobOutputDir>]
??????? [-list [all]]
??????? [-kill-task <task-id>]
??????? [-fail-task <task-id>]
??????? [-schedule-task <task-id>]
??????? [-input-add <job-id> <input>? [ <vertex-id> ] ]
??????? [-input-done <job-id>? [ <vertex-id> ] ]
??????? [-reload-limit-conf]
??????? [-idle-failover <job-id>]
Generic options supported are
-conf <configuration file>???? specify an application configuration file
-D <property=value>??????????? use value for given property
-fs <local|namenode:port>????? specify a namenode
-jt <local|jobtracker:port>??? specify a job tracker
-files <comma separated list of files>??? specify comma separated files to be copied to the map reduce cluster
-libjars <comma separated list of jars>??? specify comma separated jar files to include in the classpath.
-archives <comma separated list of archives>??? specify comma separated archives to be unarchived on the compute machines.

The general command line syntax is
bin/hadoop command [genericOptions] [commandOptions]

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