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https://issues.apache.org/jira/browse/HBASE-7716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell closed HBASE-7716.
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> Row Groups / Row Family / Entity Groups in HBase
> ------------------------------------------------
>
> Key: HBASE-7716
> URL: https://issues.apache.org/jira/browse/HBASE-7716
> Project: HBase
> Issue Type: New Feature
> Components: Client, regionserver
> Reporter: Enis Soztutar
> Priority: Major
> Attachments: Entity Groups in HBase.txt
>
>
> This issue is to discuss the possible addition to the HBase data model for
> "Row Groups".
> As we are nearing 1.0, discussing this for 0.98 seems the right time,
> especially given that we have custom region split policies, local
> transactions, and API overhaul around data types -> bytes.
> Row Groups are semantic groupings of rows in the Hbase data model. All rows
> within a given row group share the same row group key.
> Row groups are similar to column families in HBase or locality groups in
> BigTable, but transposed to rows instead of columns. All the rows within a
> row group physically belong together, and served by a single region. This
> means that region boundaries cannot split the row group.
> Row groups are not predefined, and are dynamic. There can be one row group
> per row.
> Row keys are fully optional, and backwards compatible.
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