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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-333) we should have some checks that the sort benchmark generates correct outputs
Date Tue, 13 Feb 2007 05:23:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12472527
] 

Owen O'Malley commented on HADOOP-333:
--------------------------------------

Another reasonable check would be to join the input and output directories:

input dir: key, value -> (key,value), 1
output dir: key, value -> (key, value), 2

and ensure that you always have an equal number of 1's and 2's for each key,value pair.

> we should have some checks that the sort benchmark generates correct outputs
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-333
>                 URL: https://issues.apache.org/jira/browse/HADOOP-333
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>
> We should implement some checks of the input versus output of the sort benchmark to get
some correctness guarantees:
> 1. the number of records
> 2. the number of bytes
> 3. the output records are in fact sorted
> 4. the xor of the md5 of each record's key/value pair

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