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From "Scott Chen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-2170) Send out last-minute load averages in TaskTrackerStatus
Date Tue, 09 Nov 2010 18:41:08 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930227#action_12930227
] 

Scott Chen commented on MAPREDUCE-2170:
---------------------------------------

Hey Harsh,
Why do we need to override getSystemLoadAverage()? The native one should also work for Linux
case, right?
{code}
  @Override
  public float getSystemLoadAverage() {
    readProcLoadAverageFile();
    return loadAverage;
  }
{code}


> Send out last-minute load averages in TaskTrackerStatus
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-2170
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2170
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>    Affects Versions: 0.22.0
>         Environment: GNU/Linux
>            Reporter: Harsh J Chouraria
>            Assignee: Harsh J Chouraria
>            Priority: Minor
>             Fix For: 0.22.0
>
>   Original Estimate: 0.33h
>  Remaining Estimate: 0.33h
>
> Load averages could be useful in scheduling. This patch looks to extend the existing
Linux resource plugin (via /proc/loadavg file) to allow transmitting load averages of the
last one minute via the TaskTrackerStatus.
> Patch is up for review, with test cases added, at: https://reviews.apache.org/r/20/

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