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

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

    [ https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12701640#action_12701640 ] 

stack commented on HBASE-451:
-----------------------------

I don't see any action on this issue.  Should we move to 0.21?

> 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
>             Fix For: 0.20.0
>
>
> 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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