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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5424) Expired launching tasks affect small jobs' execution time
Date Fri, 06 Mar 2009 11:39:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679564#action_12679564

Vinod K V commented on HADOOP-5424:

May be we can 'speculatively' launch tasks by tracking the average completion time of tasks'
launching. Thoughts?

> Expired launching tasks affect small jobs' execution time
> ---------------------------------------------------------
>                 Key: HADOOP-5424
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5424
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Vinod K V
> Currently when a task is given to a TT, the JT doesn't mark the task as running till
the TT responds back to the JT. And within 10 mins(hard-coded), if the task doesn't come back,
then only the task gets relaunched. For small jobs, this is a lot of time.

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