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Posted to dev@avro.apache.org by "alex gemini (JIRA)" <ji...@apache.org> on 2012/11/06 14:46:13 UTC
[jira] [Created] (AVRO-1192) trevni should support RLE encoding
based on selectivity
alex gemini created AVRO-1192:
---------------------------------
Summary: trevni should support RLE encoding based on selectivity
Key: AVRO-1192
URL: https://issues.apache.org/jira/browse/AVRO-1192
Project: Avro
Issue Type: Improvement
Components: java
Affects Versions: 1.8.0
Reporter: alex gemini
Priority: Minor
it would be nice if trevni support run-length encoding. columnar format should first sort the columnar order based on selectivity .for higher selectivity column trenvi should support run-length encoding .more information will be found in paper "C-Store: A Column-oriented DBMS" section 3.1 :Encoding Schemes
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[jira] [Commented] (AVRO-1192) trevni should support RLE encoding
based on selectivity
Posted by "alex gemini (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/AVRO-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491467#comment-13491467 ]
alex gemini commented on AVRO-1192:
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It should also investigate current trevni block size 64k is appropriate for compression.Most columnar format is 1mb block size.
> trevni should support RLE encoding based on selectivity
> -------------------------------------------------------
>
> Key: AVRO-1192
> URL: https://issues.apache.org/jira/browse/AVRO-1192
> Project: Avro
> Issue Type: Improvement
> Affects Versions: 1.8.0
> Reporter: alex gemini
> Priority: Minor
> Labels: compression, performance
>
> it would be nice if trevni support run-length encoding. columnar format should first sort the columnar order based on selectivity .for higher selectivity column trenvi should support run-length encoding .more information will be found in paper "C-Store: A Column-oriented DBMS" section 3.1 :Encoding Schemes
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[jira] [Updated] (AVRO-1192) trevni should support RLE encoding
based on selectivity
Posted by "alex gemini (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/AVRO-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
alex gemini updated AVRO-1192:
------------------------------
Component/s: (was: java)
> trevni should support RLE encoding based on selectivity
> -------------------------------------------------------
>
> Key: AVRO-1192
> URL: https://issues.apache.org/jira/browse/AVRO-1192
> Project: Avro
> Issue Type: Improvement
> Affects Versions: 1.8.0
> Reporter: alex gemini
> Priority: Minor
> Labels: compression, performance
>
> it would be nice if trevni support run-length encoding. columnar format should first sort the columnar order based on selectivity .for higher selectivity column trenvi should support run-length encoding .more information will be found in paper "C-Store: A Column-oriented DBMS" section 3.1 :Encoding Schemes
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