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From "Dan Washusen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2249) The PerformanceEvaluation read tests don't take the MemStore into account.
Date Tue, 23 Feb 2010 23:12:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837501#action_12837501
] 

Dan Washusen commented on HBASE-2249:
-------------------------------------

Oops, I missed a step...

# PerformanceEvaluation.Test#test gets the current time
# PerformanceEvaluation.Test#test calls PerformanceEvaluation.Test#testTimed
# PerformanceEvaluation.Test#testTimed calls PerformanceEvaluation.Test#testRow
# PerformanceEvaluation.Test#testRow opens the scanner and iterates over all rows in the result
set
# PerformanceEvaluation.Test#test calculates the difference between the start time and end
time and reports it as the elapsed time

> The PerformanceEvaluation read tests don't take the MemStore into account.
> --------------------------------------------------------------------------
>
>                 Key: HBASE-2249
>                 URL: https://issues.apache.org/jira/browse/HBASE-2249
>             Project: Hadoop HBase
>          Issue Type: Improvement
>    Affects Versions: 0.20.3
>            Reporter: Dan Washusen
>             Fix For: 0.20.4
>
>         Attachments: HBASE-2249.patch
>
>
> The write tests in the PerformanceEvaluation flush the MemStore after they complete,
as a result the read tests don't take the MemStore into account (because it's always empty).
 An optional flag could be provided when the performance evaluation starts that dictates if
the table should be flushed after a test completes.  This optional flag would allow changes
to the MemStore to be performance tested...

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