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Date: Mon, 20 May 2013 20:15:18 +0000 (UTC)
From: "Arun C Murthy (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12648013.1368728159584.348704.1369080918471@arcas>
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Subject: [jira] [Commented] (YARN-689) Add multiplier unit to
 resourcecapabilities
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    [ https://issues.apache.org/jira/browse/YARN-689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13662322#comment-13662322 ] 

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

bq. All the nodes in a cluster have 3 GB. Because YARN does not yet allow us to set limits on disk IO, we don't want more than 3 containers on each node.

I'm sorry, this isn't making sense to me.

The reason we do multi-resource scheduling is to *stop* trying to come up with proxies. Why aren't we doing DRF? I'm not comfortable with this change.
                
> 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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