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Posted to common-issues@hadoop.apache.org by "Hong Tang (JIRA)" <ji...@apache.org> on 2009/10/31 02:01:04 UTC

[jira] Created: (HADOOP-6350) We should have some mechanism to enforce metrics as part of the public API.

We should have some mechanism to enforce metrics as part of the public API.
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                 Key: HADOOP-6350
                 URL: https://issues.apache.org/jira/browse/HADOOP-6350
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Hong Tang


Metrics should be part of public API, and should be clearly documented similar to HADOOP-5073, so that we can reliably build tools on top of them.

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[jira] Commented: (HADOOP-6350) We should have some mechanism to enforce metrics as part of the public API.

Posted by "Hong Tang (JIRA)" <ji...@apache.org>.

    [ https://issues.apache.org/jira/browse/HADOOP-6350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772200#action_12772200 ] 

Hong Tang commented on HADOOP-6350:
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Some suggestions and requirements:
- Employ a similar scope and stability scheme as HADOOP-5073 to mark each metrics.
- Ensure the meanings of all metrics are clearly defined (e.g. whether it is a counter or gauge, what is the unit, what is the range of the values, etc).
- Ensure that changes to the metrics (addition, deletion, changing of names and/or meanings) can be automatically detected.


> We should have some mechanism to enforce metrics as part of the public API.
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-6350
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6350
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Hong Tang
>
> Metrics should be part of public API, and should be clearly documented similar to HADOOP-5073, so that we can reliably build tools on top of them.

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