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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1004) yarn.scheduler.minimum|maximum|increment-allocation-mb should have scheduler
Date Wed, 31 Jul 2013 18:15:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-1004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725530#comment-13725530
] 

Vinod Kumar Vavilapalli commented on YARN-1004:
-----------------------------------------------

bq.  maximum-allocation is just for consistency. My thought is that it should be scheduler-specific
because it's up to the scheduler to honor the config. Someone could write a new scheduler
and not handle it.
I haven't been following the FifoScheduler changes but this is wrong. All schedulers should
honor this. Otherwise app-writers won't know what can be honoured and what cannot be.

Seems like it is already agreed that min is specific to scheduler. Even there I'd make the
same argument.
                
> yarn.scheduler.minimum|maximum|increment-allocation-mb should have scheduler
> ----------------------------------------------------------------------------
>
>                 Key: YARN-1004
>                 URL: https://issues.apache.org/jira/browse/YARN-1004
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.1.0-beta
>            Reporter: Sandy Ryza
>
> As yarn.scheduler.minimum-allocation-mb is now a scheduler-specific configuration, and
functions differently for the Fair and Capacity schedulers, it would be less confusing for
the config names to include the scheduler names, i.e. yarn.scheduler.fair.minimum-allocation-mb,
yarn.scheduler.capacity.minimum-allocation-mb, and yarn.scheduler.fifo.minimum-allocation-mb.
> The same goes for yarn.scheduler.increment-allocation-mb, which only exists for the Fair
Scheduler, and yarn.scheduler.maximum-allocation-mb, for consistency.
> If we wish to preserve backwards compatibility, we can deprecate the old configs to the
new ones. 

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