[jira] [Commented] (MAPREDUCE-2198) Allow FairScheduler to control the number of slots on each TaskTracker

["Scott Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105119#comment-13105119 ] 

Scott Chen commented on MAPREDUCE-2198:
---------------------------------------

Arun: Thanks for the comments. You are right. I guess this is not an issue since we have MRv2. Closing this now.


> Allow FairScheduler to control the number of slots on each TaskTracker
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2198
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2198
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: contrib/fair-share
>    Affects Versions: 0.23.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-2198-v2.txt, MAPREDUCE-2198.txt
>
>
> We can set the number of slots on the TaskTracker to be high and let FairScheduler handles the slots.
> This approach allows us to change the number of slots on each node dynamically.
> The administrator can change the number of slots with a CLI tool.
> One use case of this is for upgrading the MapReduce.
> Instead of restarting the cluster, we can run the new MapReduce on the same cluster.
> And use the CLI tool to gradually migrate the slots.
> This way we don't lost the progress fo the jobs that's already executed.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira