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Date: Tue, 18 Nov 2008 06:51:44 -0800 (PST)
From: "Amar Kamat (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-4623) Running tasks are not maintained by
 JobInProgress if speculation is off
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    [ https://issues.apache.org/jira/browse/HADOOP-4623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648615#action_12648615 ] 

Amar Kamat commented on HADOOP-4623:
------------------------------------

I ran gridmix on _trunk_ and _trunk+patch-v1.2_ and here are the results 
||type||time(secs)||
|trunk|2373|
|trunk+patch-v1.2|2556|
This patch takes ~3min more than trunk. I will benchmark this again and see if the results are consistent. 

> Running tasks are not maintained by JobInProgress if speculation is off
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-4623
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4623
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>         Attachments: HADOOP-4623-v1.1.patch, HADOOP-4623-v1.2.patch
>
>
> {{JobInProgress}} doesnt maintain any structure for running tasks if speculation is turned _off_.  {{getRunningMapCache()}} in {{JobInProgress}} exposes the running map cache. This api returns an empty {{Map}} if speculation turned off. 
> _Usage_ :
> {{CapicityScheduler}} requires a list of running tasks for both speculated and non-speculated jobs. See HADOOP-4558 to see how this issue affects {{CapacityScheduler}}.

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