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Posted to issues@hbase.apache.org by "He Yongqiang (Assigned) (JIRA)" <ji...@apache.org> on 2012/03/05 21:07:57 UTC

[jira] [Assigned] (HBASE-5521) Move compression/decompression to an encoder specific encoding context

     [ https://issues.apache.org/jira/browse/HBASE-5521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

He Yongqiang reassigned HBASE-5521:
-----------------------------------

    Assignee: He Yongqiang
    
> Move compression/decompression to an encoder specific encoding context
> ----------------------------------------------------------------------
>
>                 Key: HBASE-5521
>                 URL: https://issues.apache.org/jira/browse/HBASE-5521
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>         Attachments: HBASE-5521.1.patch
>
>
> As part of working on HBASE-5313, we want to add a new columnar encoder/decoder. It makes sense to move compression to be part of encoder/decoder:
> 1) a scanner for a columnar encoded block can do lazy decompression to a specific part of a key value object
> 2) avoid an extra bytes copy from encoder to hblock-writer. 
> If there is no encoder specified for a writer, the HBlock.Writer will use a default compression-context to do something very similar to today's code.

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