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https://issues.apache.org/jira/browse/HADOOP-2830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HADOOP-2830.
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Resolution: Duplicate
I'm pushing this into 289 too.
> Need to instrument Hadoop to get comprehensive network traffic metrics
> ----------------------------------------------------------------------
>
> Key: HADOOP-2830
> URL: https://issues.apache.org/jira/browse/HADOOP-2830
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Runping Qi
>
> One of most often asked question regarding Hadoop performance is: was the job
> cpu bounded, or disk bounded, or network bounded.
> The first two parts can be answered based on metric data of individual
> machines, thus are relatively easy to answer.
> The third part is much harder, especially for a large cluster. To unswer the
> question, we need to know the followings:
> 1. The network traffic to and from the nodes in the cluster
> 2. The network traffic going between node pairs through the switch they share
> 3. The network traffic going through the back links between the switches
> With these data, we can get a better insight on the relationship between
> network bandwidth and hadoop performance.
> We need to instrument the Hadoop code to obtain the above data.
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