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https://issues.apache.org/jira/browse/HBASE-5612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401110#comment-13401110
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alex gemini commented on HBASE-5612:
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for fixed-length data type(byte,integer,double etc),we can store key-length in
RLE encoding like RCFile's metedata did. for data type like String for column
"email" or "address" , we can use prefix compression or dictionary compression
to store most used word in hfile's head, this will both save memory and disk
space.
> Data types for HBase values
> ---------------------------
>
> Key: HBASE-5612
> URL: https://issues.apache.org/jira/browse/HBASE-5612
> Project: HBase
> Issue Type: Improvement
> Reporter: Mikhail Bautin
> Assignee: Mikhail Bautin
>
> In many real-life applications all values in a certain column family are of a
> certain data type, e.g. 64-bit integer. We could specify that in the column
> descriptor and enable data type-specific compression such as variable-length
> integer encoding.
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