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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-727) Move the bin/hadoop jar command over to bin/mapred
Date Wed, 11 Nov 2009 19:52:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776613#action_12776613
] 

Todd Lipcon commented on MAPREDUCE-727:
---------------------------------------

bq. 'bin/hadoop job -submit' would be the same functionality as 'bin/hadoop jar', hence there
is no dissonance?

It seems strange to me from a user's perspective since the rest of the "job" commands target
single jobs, and that one could submit 0, 1, or N jobs.

Going a bit off-topic from this JIRA, I think a very useful mapred command line would be:
mapred job -submit -jar foo.jar -mapper com.mycorp.FooMapper -reducer com.mycorp.FooReducer
-input blah -output blah -inputformat blah -outputformat blah -numReducers 3 ...  this makes
sense as a generic "always one job submitted" interface, whereas we could keep "hadoop jar
foo.jar" to mean "run this jar with all of the hadoop environment stuff set up"

> Move the bin/hadoop jar command over to bin/mapred
> --------------------------------------------------
>
>                 Key: MAPREDUCE-727
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-727
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Arun C Murthy
>             Fix For: 0.21.0
>
>
> Currently 'bin/hadoop jar' is used to submit jobs, we should move it over to bin/mapred.

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