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From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-263) task status should include timestamps for when a job transitions
Date Wed, 09 Aug 2006 14:24:15 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-263?page=all ]

Sanjay Dahiya updated HADOOP-263:
---------------------------------

    Attachment: patch.txt

A new patch, now shows start, finish times for tasks and shuffle/sort finished time for reduce
tasks. 
few points, which should probably be separate issues. 
- TaskStatus, TeskReport replicate some status data which is present as member variables in
TaskTracker.TaskInProgress, TaskInProgress. We can reduce the duplication of data by maintaining
objects of TaskStatus and get/set from that directly, using simple composition. 
- The status string passed around needs to be a public static final String defined in TaskStatus
and used everywhere else, so it can be compared against reliably wrt future changes. Currently
its reduce > copy (...), reduce > sort, reduce > reduce.


> task status should include timestamps for when a job transitions
> ----------------------------------------------------------------
>
>                 Key: HADOOP-263
>                 URL: http://issues.apache.org/jira/browse/HADOOP-263
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.2.1
>            Reporter: Owen O'Malley
>         Assigned To: Sanjay Dahiya
>             Fix For: 0.6.0
>
>         Attachments: patch.txt, patch.txt
>
>
> It would help users to understand what happened if the task status included information
about when the task transitioned:
> Map:
>    started
>    finished
> Reduce:
>    started
>    shuffle finished
>    sort finished
>    finished

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