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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10161) Add a method to change the default value of dmax in hadoop.properties
Date Mon, 16 Dec 2013 09:34:09 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848958#comment-13848958
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Tsuyoshi OZAWA commented on HADOOP-10161:
-----------------------------------------

Fixed typos in description. Please fix it if you find my mistakes.

> Add a method to change the default value of dmax in hadoop.properties
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-10161
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10161
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 2.2.0
>            Reporter: Yang He
>         Attachments: HADOOP-10161_0_20131211.patch, hadoop-metrics.properties, hadoop-metrics2.properties
>
>
> The property of dmax in ganglia is a configurable time to rotate metrics. Therefore no
more value of the metric will be emit to the gmond, after 'dmax' seconds, then gmond will
destroy the metric in memory. In hadoop metrics framework , the default value is 0, which
means the gmond will never destroy the metric although the metric is disappeared. The gmetad
daemon also does not delete the rrdtool file. 
> We need to add a method to configure the default value of dmax for all metrics in hadoop.propertis.



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