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https://issues.apache.org/jira/browse/HBASE-9203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13744970#comment-13744970
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ramkrishna.s.vasudevan commented on HBASE-9203:
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For the indexhalf store file reader,
Yes, as i said in the above comment
bq.Mostly it will be the same data but the thing is we would read the HFile
twice to create the top and bottom files for the index region.
For the namespaces I think we could move index table to a namespace so that it
is not directly workable for the user something like a system table.
> Secondary index support through coprocessors
> --------------------------------------------
>
> Key: HBASE-9203
> URL: https://issues.apache.org/jira/browse/HBASE-9203
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.98.0
> Reporter: rajeshbabu
> Assignee: rajeshbabu
> Attachments: SecondaryIndex Design.pdf
>
>
> We have been working on implementing secondary index in HBase and open
> sourced on hbase 0.94.8 version.
> The project is available on github.
> https://github.com/Huawei-Hadoop/hindex
> This Jira is to support secondary index on trunk(0.98).
> Following features will be supported.
> - multiple indexes on table,
> - multi column index,
> - index based on part of a column value,
> - equals and range condition scans using index, and
> - bulk loading data to indexed table (Indexing done with bulk load)
> Most of the kernel changes needed for secondary index is available in trunk.
> Very minimal changes needed for it.
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