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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-352) Make Hive support column based storage
Date Wed, 22 Apr 2009 08:32:47 GMT

     [ https://issues.apache.org/jira/browse/HIVE-352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-352:
------------------------------

    Attachment: 4-22 performance.txt
                4-22 progress.txt
                hive-352-2009-4-22.patch

4-22 progress.txt describes latest modifications hive-352-2009-4-22.patch made.
4-22 performance.txt gives a simple test results, which can be reproduced by running org.apache.hadoop.hive.ql.io.PerformTestRCFileAndSeqFile
(it uses LocalFileSystem). I am not quite confident with the RCFile's read performance, the
results show it does much better than SequenceFile. Are there some bugs?  I tested with TestRCFile
and three added .q files, they all passed in my local.

> Make Hive support column based storage
> --------------------------------------
>
>                 Key: HIVE-352
>                 URL: https://issues.apache.org/jira/browse/HIVE-352
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>         Attachments: 4-22 performance.txt, 4-22 progress.txt, hive-352-2009-4-15.patch,
hive-352-2009-4-16.patch, hive-352-2009-4-17.patch, hive-352-2009-4-19.patch, hive-352-2009-4-22.patch,
HIve-352-draft-2009-03-28.patch, Hive-352-draft-2009-03-30.patch
>
>
> column based storage has been proven a better storage layout for OLAP. 
> Hive does a great job on raw row oriented storage. In this issue, we will enhance hive
to support column based storage. 
> Acctually we have done some work on column based storage on top of hdfs, i think it will
need some review and refactoring to port it to Hive.
> Any thoughts?

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