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From "Nick Rettinghouse (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4670) Improve the way job history files are managed
Date Tue, 03 Mar 2009 16:38:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678361#action_12678361
] 

Nick Rettinghouse commented on HADOOP-4670:
-------------------------------------------

We have an extremely high job rate. Sorting by YYYY/MM/DD/HH would be a great help. (We could
live with YYYY/MM/DD.)

> Improve the way job history files are managed
> ---------------------------------------------
>
>                 Key: HADOOP-4670
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4670
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>
> 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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