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https://issues.apache.org/jira/browse/HBASE-27329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17584885#comment-17584885
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Andrew Kyle Purtell commented on HBASE-27329:
---------------------------------------------

That makes sense. 
All other encoding options apply to data blocks. The previous implementation of 
prefix tree encoding also applied to data blocks. 
It seems a bit weird that this one doesn’t.

If you want to proceed without data block support we should add the concept of 
index encoder which is separate from generic/data block encoding. Make it clear 
and intentional in the API and documentation.  No major concerns otherwise. 

> Introduce prefix tree index block encoding use less space
> ---------------------------------------------------------
>
>                 Key: HBASE-27329
>                 URL: https://issues.apache.org/jira/browse/HBASE-27329
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Lijin Bin
>            Priority: Major
>
> This index block encoding which use less space than the current 
> implementation.
>  Index block use it not data block.



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