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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2478) [hbase] restructure how HBase lays out files in the file system
Date Sun, 13 Jan 2008 13:01:10 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558396#action_12558396
] 

Hudson commented on HADOOP-2478:
--------------------------------

Integrated in Hadoop-Nightly #364 (See [http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/364/])

> [hbase] restructure how HBase lays out files in the file system
> ---------------------------------------------------------------
>
>                 Key: HADOOP-2478
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2478
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: contrib/hbase
>    Affects Versions: 0.16.0
>            Reporter: Jim Kellerman
>            Assignee: Jim Kellerman
>             Fix For: 0.16.0
>
>         Attachments: patch.txt, patch.txt, patch.txt
>
>
> Currently HBase has a pretty flat directory structure. For example:
> {code}
>  /hbase/hregion_70236052/info
> /hbase/hregion_70236052/info/info/4328260619704027575
> /hbase/hregion_70236052/info/mapfiles/4328260619704027575
> /hbase/hregion_70236052/info/mapfiles/4328260619704027575/data
> /hbase/hregion_70236052/info/mapfiles/4328260619704027575/index
> {code}
> All the region directories are under the root directory, and with encoded region names,
it is impossible to determine what table a region belongs to. This should be restructured
to:
> {code}
> /root-directory/table-name/encoded-region-name/column-family/{info,mapfiles}
> {code}
> It will be necessary to provide a migration script from current trunk to the new structure.

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