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From "Subbu M Iyer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-451) Remove HTableDescriptor from HRegionInfo
Date Thu, 02 Jun 2011 18:15:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042955#comment-13042955
] 

Subbu M Iyer commented on HBASE-451:
------------------------------------

Hi Ted,

Could you please help me with posting a new review request?

I am getting the following error when I try to upload my patch.
"Unable to parse diff revision header '(revision
a13cc6087b9b0d6924c32d100b612eedf01fd3c4)'"

I am using Git for my version control. Do I need to do it through the RBTools?

Please let me know.

thanks
Subbu



> Remove HTableDescriptor from HRegionInfo
> ----------------------------------------
>
>                 Key: HBASE-451
>                 URL: https://issues.apache.org/jira/browse/HBASE-451
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>    Affects Versions: 0.2.0
>            Reporter: Jim Kellerman
>            Assignee: Subbu M Iyer
>            Priority: Critical
>             Fix For: 0.92.0
>
>         Attachments: 451_support_for_removing_HTD_from_HRI_trunk.txt, HBASE-451_-_First_draft_support_for_removing_HTD_from_HRI1.patch
>
>
> 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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