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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5873) Measure bw of a single copy call and display the correct aggregated bw
Date Wed, 15 Oct 2014 15:42:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172488#comment-14172488
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Jason Lowe commented on MAPREDUCE-5873:
---------------------------------------

+1 lgtm.  Committing this.

> Measure bw of a single copy call and display the correct aggregated bw
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5873
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5873
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Siqi Li
>            Assignee: Siqi Li
>         Attachments: MAPREDUCE-5873.v1.patch, MAPREDUCE-5873.v2.patch, MAPREDUCE-5873.v3.patch,
MAPREDUCE-5873.v4.patch, MAPREDUCE-5873.v5.patch, MAPREDUCE-5873.v6.patch, MAPREDUCE-5873.v9.patch
>
>
> Currently ShuffleScheduler in ReduceTask JVM status displays bandwidth. Its definition
however is confusing because it captures the time where there is no copying because there
is a pause between when new wave of map outputs is available.
> current bw is definded as (bytes copied so far) / (total time in the copy phase so far)
> It would be more useful 
> 1) to measure bandwidth of a single copy call.
> 2) display aggregated bw as long as there is at least one fetcher is in the copy call.



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