[jira] Updated: (HADOOP-2478) [hbase] restructure how HBase lays out files in the file system

["Jim Kellerman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-2478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jim Kellerman updated HADOOP-2478:
----------------------------------

    Attachment: patch.txt

Although this won't go in until 0.17, let's get Hudson used to running it. He doesn't like most patches.

> [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
>
>
> 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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