[jira] Issue Comment Edited: (HADOOP-3062) Need to capture the metrics for the network ios generate by dfs reads/writes and map/reduce shuffling and break them down by racks

["Chris Douglas (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-3062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623533#action_12623533 ] 

chris.douglas edited comment on HADOOP-3062 at 8/18/08 6:44 PM:
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Updated based on Nicholas's feedback, i.e. added {{isInfoEnabled}} guards around appropriate log stmts. Also removed the irrelevant replication log message. I'll commit this if Hudson doesn't object.

      was (Author: chris.douglas):
    Updated based on Nicholas's feedback, i.e. added {{isInfoEnabled}} guards around appropriate log stmts. Also removed the irrelevant replication log message.
  
> Need to capture the metrics for the network ios generate by dfs reads/writes and map/reduce shuffling  and break them down by racks 
> ------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3062
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3062
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: Runping Qi
>            Assignee: Chris Douglas
>             Fix For: 0.19.0
>
>         Attachments: 3062-0.patch, 3062-1.patch, 3062-2.patch
>
>
> In order to better understand the relationship between hadoop performance and the network bandwidth, we need to know 
> what the aggregated traffic data in a cluster and its breakdown by racks. With these data, we can determine whether the network 
> bandwidth is the bottleneck when certain jobs are running on a cluster.

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