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From Jim Kellerman <...@powerset.com>
Subject RE: [jira] Commented: (HADOOP-2478) [hbase] restructure how HBase lays out files in the file system
Date Thu, 10 Jan 2008 01:41:50 GMT
Stack tells me that code freeze for 0.16 is either late this week or early next. So no refactoring
yet.

---
Jim Kellerman, Senior Engineer; Powerset


> -----Original Message-----
> From: Bryan Duxbury (JIRA) [mailto:jira@apache.org]
> Sent: Wednesday, January 09, 2008 5:38 PM
> To: hadoop-dev@lucene.apache.org
> Subject: [jira] Commented: (HADOOP-2478) [hbase] restructure
> how HBase lays out files in the file system
>
>
>     [
> https://issues.apache.org/jira/browse/HADOOP-2478?page=com.atl
assian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557514#action_12557514
> ]
>
> Bryan Duxbury commented on HADOOP-2478:
> ---------------------------------------
>
> If this won't be fixed until 0.17, which is months away,
> should we apply my HStore refactor patch in the meantime?
>
> > [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: 0.17.0
> >            Reporter: Jim Kellerman
> >            Assignee: Jim Kellerman
> >             Fix For: 0.17.0
> >
> >         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,map
> > files}
> > {code}
> > It will be necessary to provide a migration script from
> current trunk to the new structure.
>
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