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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6083) TestFsck takes nearly 10 minutes to run - a quarter of the entire hdfs-test time
Date Fri, 19 Jun 2009 01:57:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721613#action_12721613
] 

Jakob Homan commented on HADOOP-6083:
-------------------------------------

bq. Surprisingly, the min is 126.07, which is outside 3sd. If we assume normal distribution,
the probability of getting it is < 0.003 but you got it in 1/16. What makes it running
so fast?
I messed up the chart, but the standard deviation for the test is high in general.

> TestFsck takes nearly 10 minutes to run - a quarter of the entire hdfs-test time
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-6083
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6083
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: test
>            Reporter: Jakob Homan
>
> run-test-hdfs was run repeatedly (n = 16) and the execution time of each test was recorded.
 Testfsck was by far the longest test, with a median run time of 564 seconds, nearly 10 minutes.
 This is a quarter of the entire time spent over the average 40 minute run for all the tests,
and much too long for any individual test.

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