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https://issues.apache.org/jira/browse/HBASE-5521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13232101#comment-13232101
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Phabricator commented on HBASE-5521:
------------------------------------
heyongqiang has commented on the revision "HBASE-5521 [jira] Move
compression/decompression to an encoder specific encoding context".
will address the java doc etc comments.
INLINE COMMENTS
src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java:61 It
will also do the compression.
The internalEncodeKeyValues() only does the encoding. but compressKeyValues
will do encoding (by calling internalEncode...) and compress in postEncoding().
REVISION DETAIL
https://reviews.facebook.net/D2097
> 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
> Fix For: 0.96.0
>
> Attachments: HBASE-5521.1.patch, HBASE-5521.D2097.1.patch,
> HBASE-5521.D2097.2.patch, HBASE-5521.D2097.3.patch, HBASE-5521.D2097.4.patch,
> HBASE-5521.D2097.5.patch, HBASE-5521.D2097.6.patch, HBASE-5521.D2097.7.patch,
> HBASE-5521.D2097.8.patch, HBASE-5521.D2097.9.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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