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Posted to common-user@hadoop.apache.org by Doug Cutting <cu...@apache.org> on 2006/04/06 20:57:55 UTC

Re: Purpose of Job.jar

ennis Kubes wrote:
> I keep seeing references to job.jar files.  Can someone explain what the
> job.jar files are and are they only used in distributed mode?

They are only required for distributed operation.  They permit a job to 
provide code that is not installed on all nodes.  In general, user map 
and reduce code is packaged in a job.jar.

Doug