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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-689) Add multiplier unit to resourcecapabilities
Date Tue, 21 May 2013 21:04:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13663399#comment-13663399
] 

Arun C Murthy commented on YARN-689:
------------------------------------

Also, other than the lack of clarity on the need for this feature; I want to point out that
I'm against this since this really complicates reservations etc. in a massive manner. For
e.g. let's say an AM wants 6.8G of RAM (with 1G min-size), another wants 5.9G - this means
that all schedulers have to assume significant complexity (and this now a best-fit problem)
for unclear gains.
                
> Add multiplier unit to resourcecapabilities
> -------------------------------------------
>
>                 Key: YARN-689
>                 URL: https://issues.apache.org/jira/browse/YARN-689
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: api, scheduler
>    Affects Versions: 2.0.4-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>         Attachments: YARN-689.patch, YARN-689.patch, YARN-689.patch
>
>
> Currently we overloading the minimum resource value as the actual multiplier used by
the scheduler.
> Today with a minimum memory set to 1GB, requests for 1.5GB are always translated to allocation
of 2GB.
> We should decouple the minimum allocation from the multiplier.
> The multiplier should also be exposed to the client via the RegisterApplicationMasterResponse

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