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From "He Yongqiang (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5521) Move compression/decompression to an encoder specific encoding context
Date Mon, 05 Mar 2012 19:01:58 GMT
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


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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