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https://issues.apache.org/jira/browse/MAPREDUCE-323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879570#action_12879570
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Dick King commented on MAPREDUCE-323:
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On a separate issue, I received a suggestion that we have a distinguished file
extension such as {{.jhist}} for job history files.
{{FileSystem.globStatus(Path)}} can select the config {{.xml}} files, but
1: This is not perfect, as the text {{".xml"}} can inprinciple occur at the end
of a job history file name, and
2: the globbing language does not have a "give me all files _except_" operator.
> 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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