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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-689) Add multiplier unit to resourcecapabilities
Date Fri, 17 May 2013 23:49:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661159#comment-13661159
] 

Sandy Ryza commented on YARN-689:
---------------------------------

Consider this situation:
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.  We do, however, think it is reasonable
to run two 1.5 GB AMs on a node.  How would we specify this with only a multiplier?
                
> 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
>
>
> 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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