[jira] Commented: (HBASE-451) Remove HTableDescriptor from HRegionInfo

["Jean-Daniel Cryans (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12605609#action_12605609 ] 

Jean-Daniel Cryans commented on HBASE-451:
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This issue can be fixed using the HBase implementation of Zookeeper (see HBASE-546). What will be behind the interface can either be a new table TABLE or a file like Jim wrote. I prefer the file solution since it will work in the same way with ZK.

> Remove HTableDescriptor from HRegionInfo
> ----------------------------------------
>
>                 Key: HBASE-451
>                 URL: https://issues.apache.org/jira/browse/HBASE-451
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>    Affects Versions: 0.2.0
>            Reporter: Jim Kellerman
>
> There is an HRegionInfo for every region in HBase. Currently HRegionInfo also contains the HTableDescriptor (the schema). That means we store the schema n times where n is the number of regions in the table.
> Additionally, for every region of the same table that the region server has open, there is a copy of the schema. Thus it is stored in memory once for each open region.
> If HRegionInfo merely contained the table name the HTableDescriptor could be stored in a separate file and easily found.

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