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https://issues.apache.org/jira/browse/MAPREDUCE-323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877425#action_12877425
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Allen Wittenauer commented on MAPREDUCE-323:
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This should work just like core dump configuration options. A pattern is
provided via an option and the system replaces the pattern's parameters with
the job's unique values. This way everyone can get what they want in a very
simple interface. Hard-coding a log file name is something that we shouldn't
be doing anyway.
> -1. There is no point supporting configuration options which are clearly
> infeasible in several cases.
If we stop hard coding log file names and use pattern substitution, then this
isn't the case anymore.
> Improve the way job history files are managed
> ---------------------------------------------
>
> Key: MAPREDUCE-323
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-323
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Amar Kamat
> Assignee: Dick King
> Priority: Critical
>
> Today all the jobhistory files are dumped in one _job-history_ folder. This
> can cause problems when there is a need to search the history folder
> (job-recovery etc). It would be nice if we group all the jobs under a _user_
> folder. So all the jobs for user _amar_ will go in _history-folder/amar/_.
> Jobs can be categorized using various features like _jobid, date, jobname_
> etc but using _username_ will make the search much more efficient and also
> will not result into namespace explosion.
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