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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-2830) Need to instrument Hadoop to get comprehensive network traffic metrics
Date Sat, 19 Jul 2014 19:00:39 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Allen Wittenauer resolved HADOOP-2830.

    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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