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Posted to mapreduce-issues@hadoop.apache.org by "Bochun Bai (JIRA)" <ji...@apache.org> on 2011/07/27 13:23:09 UTC
[jira] [Created] (MAPREDUCE-2734) DistCp with FairScheduler assign
all map tasks in one TT
DistCp with FairScheduler assign all map tasks in one TT
--------------------------------------------------------
Key: MAPREDUCE-2734
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2734
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: distcp
Affects Versions: 0.21.0
Reporter: Bochun Bai
1 Using FairScheduler.
2 distcp a directory contains 5 files.
The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
It should be assigned different, like the original JobQueueScheduler.
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[jira] [Commented] (MAPREDUCE-2734) DistCp with FairScheduler
assign all map tasks in one TT
Posted by "Bochun Bai (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071657#comment-13071657 ]
Bochun Bai commented on MAPREDUCE-2734:
---------------------------------------
I will check how the HEAD version works.
> DistCp with FairScheduler assign all map tasks in one TT
> --------------------------------------------------------
>
> Key: MAPREDUCE-2734
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2734
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: distcp
> Affects Versions: 0.21.0
> Reporter: Bochun Bai
>
> 1 Using FairScheduler.
> 2 distcp a directory contains 5 files.
> The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
> It should be assigned different, like the original JobQueueScheduler.
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For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Updated] (MAPREDUCE-2734) DistCp with FairScheduler assign
all map tasks in one TT
Posted by "Bochun Bai (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Bochun Bai updated MAPREDUCE-2734:
----------------------------------
Priority: Trivial (was: Major)
> DistCp with FairScheduler assign all map tasks in one TT
> --------------------------------------------------------
>
> Key: MAPREDUCE-2734
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2734
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: distcp
> Affects Versions: 0.21.0
> Reporter: Bochun Bai
> Priority: Trivial
>
> 1 Using FairScheduler.
> 2 distcp a directory contains 5 files.
> The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
> It should be assigned different, like the original JobQueueScheduler.
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For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Updated] (MAPREDUCE-2734) DistCp with FairScheduler assign
all map tasks in one TT
Posted by "Bochun Bai (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Bochun Bai updated MAPREDUCE-2734:
----------------------------------
Component/s: (was: distcp)
jobtracker
Assignee: Bochun Bai
> DistCp with FairScheduler assign all map tasks in one TT
> --------------------------------------------------------
>
> Key: MAPREDUCE-2734
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2734
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobtracker
> Affects Versions: 0.21.0
> Reporter: Bochun Bai
> Assignee: Bochun Bai
> Priority: Trivial
>
> 1 Using FairScheduler.
> 2 distcp a directory contains 5 files.
> The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
> It should be assigned different, like the original JobQueueScheduler.
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[jira] [Commented] (MAPREDUCE-2734) DistCp with FairScheduler
assign all map tasks in one TT
Posted by "Bochun Bai (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078554#comment-13078554 ]
Bochun Bai commented on MAPREDUCE-2734:
---------------------------------------
Turning mapred.fairscheduler.assignmultiple=false solves the problem.
There is no component like contrib/fair-scheduler. I move this issues to the jobtracker.
Considering two possible improvement:
1. document this parameter in mapreduce/src/docs/src/documentation/content/xdocs/fair_scheduler.xml
2. change the default value to false.
> DistCp with FairScheduler assign all map tasks in one TT
> --------------------------------------------------------
>
> Key: MAPREDUCE-2734
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2734
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobtracker
> Affects Versions: 0.21.0
> Reporter: Bochun Bai
> Assignee: Bochun Bai
> Priority: Trivial
>
> 1 Using FairScheduler.
> 2 distcp a directory contains 5 files.
> The DistCp job will launch 5 map tasks, and FairScheduler assign them to one TaskTracker.
> It should be assigned different, like the original JobQueueScheduler.
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