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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8306) Enhance TestJoinedScanners with ability to specify various parameters
Date Wed, 08 May 2013 16:33:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13652039#comment-13652039
] 

Ted Yu commented on HBASE-8306:
-------------------------------

FAST_DIFF encoding adds more computation to scanning. The intention was to exercise this commonly
used encoding when testing joined scanner performance.

Thanks for the review, Ram.
                
> Enhance TestJoinedScanners with ability to specify various parameters
> ---------------------------------------------------------------------
>
>                 Key: HBASE-8306
>                 URL: https://issues.apache.org/jira/browse/HBASE-8306
>             Project: HBase
>          Issue Type: Test
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Minor
>         Attachments: 8306-v1.txt, 8306-v5.txt, 8306-v6.txt, 8306-v7.txt, 8306-v7.txt
>
>
> Currently TestJoinedScanners uses fixed lengths of values for essential and non-essential
column families.
> The selection rate of SingleColumnValueFilter is fixed and distribution of selected rows
forms stripes.
> TestJoinedScanners can be enhanced in the following ways:
> 1. main() can be introduced so that the test can be run standalone
> 2. selection ratio can be specified by user
> 3. distribution of selected rows should be random
> 4. user should be able to specify data block encoding for the column families

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