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https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045615#comment-13045615
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Subbu M Iyer commented on HBASE-451:
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I have one open issue on this.
I need to address the cases when master crashes half way through the HRI
migration process. I would like to address it as part of another JIRA as 1. I
don't want to keep such a big change in my local with out commit for a long
time 2) Also, it is easier for me to work on this issue off trunk rather than
my local. (since I can be sure that everything else works and remains intact)
3) This will also help me keep my changes to a minimum and avoid a tedious
patch work.
Any thoughts/comments?
> 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,
> HBASE-451_-_Second_draft_-_Remove_HTD_from_HRI.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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