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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5726) Remove pre-emption from the capacity scheduler code base
Date Tue, 05 May 2009 07:36:30 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hemanth Yamijala updated HADOOP-5726:
-------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.20.1
     Release Note: Removed pre-emption from capacity scheduler. The impact of this change
is that capacities for queues can no longer be guaranteed within a given span of time. Also
changed configuration variables to remove pre-emption related variables and better reflect
the absence of guarantees.
     Hadoop Flags: [Incompatible change, Reviewed]
           Status: Resolved  (was: Patch Available)

I just committed this to trunk and branch 0.20. Thanks, Rahul !

> Remove pre-emption from the capacity scheduler code base
> --------------------------------------------------------
>
>                 Key: HADOOP-5726
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5726
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/capacity-sched
>            Reporter: Hemanth Yamijala
>            Assignee: rahul k singh
>             Fix For: 0.20.1
>
>         Attachments: cs-without-preemption-23-1-2009.patch
>
>
> In an effort to simplify the code base, we would like to remove the pre-emption related
code in the capacity scheduler. We would reintroduce this (possibly with some revisions to
the original design) after a while. This will be an incompatible change. Any objections ?

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