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From "Siqi Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5873) Measure bw of a single copy call and display the correct aggregated bw
Date Tue, 06 May 2014 19:09:17 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siqi Li updated MAPREDUCE-5873:
-------------------------------

    Status: Patch Available  (was: Open)

> 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
>
>
> 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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